BODY BUILDER MANUAL - GM UPFITTER...ZW2 Window Pkg, RR Doors ZW3 WINDOW-PKG, PASSENGER SIDE ONLY ZW6 WINDOW-PKG, RH & LH SIDE DOORS ZW9 Body Equipment - Chassis Body ZY1 Solid Color

BODY BUILDER MANUAL FOR

2015 CHEVROLET CITY EXPRESS

ELECTRICAL SECTION

Revision 1.2 www.gmupfitter.com 10/20/2015

http://www.gmupfitter.com/

Note to User: As part of our mission to provide an up-to-date website that includes detailed Body Builder Manuals, Technical Bulletins, and Best Practice Manuals, we are now using sectional excerpts directly from the General Motors Service Information publications for our Electrical Body Builder Manuals. You will note that the section numbers are non-sequential as we have provided only those that are believed to be the most pertinent to the Upfitter community and best suited to their needs.* This new usage of the Service Information provides the opportunity for us to remain consistent with the changes that take place throughout the model year and to provide you updated information in a more timely fashion.

* If you would like to have access to all of the electrical Service Information, please apply for a subscription from ACDelco at

http://acdelcotechconnect.com/html/tss_tech_esi.jsp

http://acdelcotechconnect.com/html/tss_tech_esi.jsp

General InformationGeneral InformationIntroductionVehicle, Engine and Transmission ID and VIN Location, Derivative and Usage

The VIN plate is the legal identifier of the vehicle. The VIN plate (1) is located on the upper left corner of the instrument panel (I/P) and can be seen through the windshield from the outside of the vehicle:

Vehicle Identification Number (VIN) System

Position Definition Character Description

1 WMI 3 3 = Built in Mexico

N = Manufactured by Nissan for General Motors

6 = Truck2

WMI

N

3 = Built in Mexico


6 = Truck

3

WMI

6

3 = Built in Mexico


6 = Truck

4 Make/Engine 3 Chevrolet with L0A engine

5 Series M City Express

6

Series

0

City Express

7 Trim Level/Vehicle Type Y/Z Y = LS, Cargo Van

Z = LT, Cargo Van

8 Safety Devices N 2 Seating Capacity, 2WD, Class C “60”, Driver & Passenger,3-Point Manual Belts, Frontal Air Bags, Side Air Bags, &Curtain Side Air Bags

9 Check Digit X (0 to 9 or X) The code for the check digit is determined by amathematical computation.

10 Model Year F 2015 Model Year

11 Plant Location K NME – Curenevaca Mexico

12–17 Plant Sequence Number — Plant Sequence Number

Engine Identification PlateRefer to CELL Link Error - Link target cell (cell ID 128620) is invalid for this publication.

Transmission Identification Plate

10/15/2015 - VERSION 1.2 2016 CHEVROLET CITY EXPRESS CARGO VAN ELECTRICAL SECTION 1 / 473

Refer to CELL Link Error - Link target cell (cell ID 254835) is invalid for this publication.


Vehicle Certification, Tire Placard, Anti-Theft, and Service Parts ID Label

Vehicle Certification, Tire Placard, Anti-Theft, and Service Parts ID Label

Callout Description

Vehicle Certification LabelThe vehicle certification label is located on the driver door and displays the following assessments:

• Gross Vehicle Weight Rating (GVWR)

• Gross Axle Weight Rating (GAWR), front and rear

• The gross vehicle weight (GVW) is the weight of the vehicle and everything it carries. The GVW must not exceed the GVWR. Include thefollowing items when figuring the GVW:

– The base vehicle weight (factory weight)

– The weight of all vehicle accessories

– The weight of the driver and the passengers

– The weight of the cargo

1 Date of Manufacture (Mo/Yr)

2 Name of Manufacturer

3 Gross Vehicle Weight Rating

4 Gross Axle Weight Rating (Front, Rear)


5 Canadian Safety Mark (w/RPO Z49)

6 Certification Statement

7 Vehicle Class Type (Pass Car, etc.)

8 Vehicle Identification Number

Tire PlacardThe tire placard label is located on the driver side B pillar and displays the following assessments:

9 Specified Occupant Seating Positions

10 Maximum Vehicle Capacity Weight

11 Tire Pressure, Front, Rear, and Spare (Cold)

12 Original Equipment Tire Size

Service Parts ID LabelThe vehicle service parts identification label is located on the rear compartment floor. The label is use to help identify the vehicle original partsand options.

13 Vehicle Option Content

14 Vehicle Identification Number

15 Engineering Model Number (Vehicle Division, Line and Body Style)

16 Interior Trim Level and Decor

17 Exterior (Paint Color) WA Number

18 Paint Technology

Anti-Theft Label

19 The Federal law requires that General Motors label certain body parts on this vehicle with the VIN. The purpose of the law is toreduce the number of motor vehicle thefts by helping in the tracing and recovery of parts from stolen vehicles.

Labels are permanently affixed to an interior surface of the part. The label on the replacement part contains the letter R, themanufacturer's logo, and the DOT symbol.

The anti-theft label must be covered before any painting, and rustproofing procedures, and uncovered after the procedures.Failure to follow the precautionary steps may result in liability for violation of the Federal Vehicle Theft Prevention Standard andpossible suspicion to the owner that the part was stolen.


RPO Code ListThe following table provides the description of the RPO codes that are available on the vehicle. The vehicles RPO list is printed on the Service Parts Identification Label.

RPO Code List

RPO Description

1LS Package

1LT Package, with LT badge

2QU Black

5AZ ACCESSORY - UNIVERSAL SAFETY KIT

9C6 GVW Rating - 4,751 LBS

A31 Windows - Power

ACO IDENTIFICATION-ACCESSORY CATALOGOFFERING

AG6 Seat - 4-Way Passenger Seat (Slide and Recline)

AH4 Seat - 6-Way Driver Seat (Slide, Recline, andHeight)

AK5 Airbags - Driver and Passenger Front

AS5 Seats w/ Driver armrest - Dual Cloth Bucket

ASF Airbag - 1st Row Front Side and Curtain Airbag

ATG Remote Keyless Entry (2 FOBs)

AU3 Door Locks - Power

AXK Vehicle Type- Truck

B31 Vinyl Flooring - 1st Row

C49 Eletronic RR Defogger (60% Rear door only)

C60 Air Conditioning (Manual Control)

CWM Technology Package

D31 Mirror Inside Rear view

D72 Door Handles - Black

D75 Door Handles - Body Color

DAP Mirror - Outside Black- Manual Adjust and Fold

DE5 Mirror - Body Color

DR6 Mirror - Outside Heated w/Power

EF7 Country United States America (USA)

FE9 Federal Emission Certification


FHO Vehicle fuel Galsoline E10

GQX White

GR1 Blue

I15 Engineering Year 2015

J0U Red

J6M Brakes Pwr, FRT Disc, RR Drum

JE5 Antilock Brakes (ABS)

JFA Parking Brake (Foot)

JL4 Control Active Brake

K0U Silver

K34 Eletronic Cruise Control

KG4 GENERATOR-150 AMP

L0A Engine - Gas 4 cyl, 2.0L, I4, City Express Only

MAH MARKETING AREA-US, PUERTO RICO/USVI

MBC MARKETING AREA-CANADA

MRA Transmission - CVT - Front Wheel Drive

NB8 California Emission Override

NB9 EMISSION OVERRIDE-EMISSIONS OVERRIDE,STATE-SPECIFIC

NC7 Federal Emission Override

NE1 Geographically Restricted Registration Emissionfor Vehicles up to 14,000 lbs GVW

NK5 Steering Wheel - Standard

NME Plant Code - Curenevaca

NT7 Federal Emission Certification, Tier 2

NU5 California Emission Override BIN 4

NUA California Emission Override 150K LEV 2

PB1 15" Wheel Covers

QTY Tire ALL - 185/60R15C 94/92T TL

RBI Tire Spare - Full Size with Steel Wheel

RRG 15" Aluminum Wheel

RRJ 15" Steel Wheel


RWU ACCESSORY-CARGO AREA ORGANIZER -COLLAPSIBLE

RYT ACCESSORY - FIRST AID KIT

T4A Front Headlamp - Halogen

T61 Daytime Running Lamps

TGA Language Control-English, French, Spanish

TL8 Grille - Dark Silver with Black Accents

U19 Speedometer, Miles/Kilo

U1B Radio-AM/FM CD Player



U2J XM Radio Delete

U2K XM Radio

U73 Fixed Radio Antenna

UAD Speakers FR (6.5") - 2

UD7 Rear Park Assist

UE0 OnStar® Delete

UF2 Lamp - Dome & Cargo (different than Aries base)

UFA Outside Temperature Display

UHV Radio-AM/FM Nav, DVD-Rom, CAF, HDD, USB,RSA, RSE

UJM Tire Pressure Monitoring with outside fill levelwarning

UP9 Bluetooth w/Steering Wheel Controls

UPF Bluetooth w/Steering Wheel Controls

USR USB Receptacle

UVC Rear Vision Camera

V22 Grille - Chrome with Black Accents

V34 Bumpers - Black FR and RR

V35 Bumpers - Body Color FR and RR

V8D Vehicle Statement - US

V8E Vehicle Statement - Canada

VAV ACCESSORY-FLOOR MATS - ALL WEATHER




VK3 Front License Plate Bracket- w/Front MountingPkg

VT7 Owners Manual - English, French Language

WBP Appearance Package

WMF Vin Model Year 2015

X88 Market Brand-Chevrolet

YA2 Door - Sliding RH and LH 2nd Row (no delete -manual only)

YF5 California Emission Certification

YM8 IDENTIFICATION-LIMITED PERSONALIZATIONOPTION (LPO)

Z49 Canada

ZW2 Window Pkg, RR Doors

ZW3 WINDOW-PKG, PASSENGER SIDE ONLY

ZW6 WINDOW-PKG, RH & LH SIDE DOORS

ZW9 Body Equipment - Chassis Body

ZY1 Solid Color


Body SystemsFixed and Moveable WindowsSchematicandRoutingDiagramsMoveable Window Schematics

Power Window

LO

C

DES

C

B+

DA09YE

10

DA09YE

B+

2

DA35YE

1 1

PD13BN

PD14L-BU

PA02D-BU

10

PA01PK

1

PA01PK

PA10D-GN

4

14

PA05PK

6

9

PA07WH

5

13

PA06BN

2

5

PA09GY

3

11

PA08D-BU

1

8

M

PA16D-GN

4

10

PA15PK

6

7

PA14WH

5

9

PA13BN

2

2

3

8

PA18D-BU

1

6

M

PA19YE

PA17PK1

PA20L-BU12

PA20L-BU

3

PDE1BK

PD13L-GN

PD14L-BU

PA02D-BU

PA01PU

PA20L-BU

PA17PK

B+ B+

4 5 15 12 11

IGN B+

X2

X3

PAE2BK

11

PAE1BK

15

X2

F10UB40A

91AX201

F13DA10A

G204 G205

J31017X307 18

512X500 6 25X600

X50BFuse Block -UnderhoodAuxiliary

K9BodyControlModule

X51AFuseBlock -InstrumentPanel

B28DDoor AjarSwitch -Driver

B28PDoor AjarSwitch -Passenger

S101DDoor Lock/WindowSwitch -Driver

M74DWindowMotor -Driver

S101PDoor Lock/WindowSwitch -Passenger

M74PWindowMotor -Passenger

A90Logic

A90Logic

A90Logic

A90Logic


Defogger Schematics

Defogger

LO

C

DES

C

B+

NA01BN

5

NA01RD

13

HAE1BK

NA03GY

NA01BN

1

NAE1BK

1

KC02L-BU

KCE2BK

KC03L-BU

KC02L-BU

12

KC01BN

11X1

C49

NA02BN

14

NA01RD/WH

NA01RD/WH

NA01RD

KCE3BK

KC03L-BU

KC02L-BU

X8

X1

X2

DE5/DR6

KC03BK

KC02BK

F29UA20A

10AX201

1X308

2X906

G901G204

F6DA10A

10X501 10X601

G205

4X403

J204J203

G204

2X510 2X610

X50AFuse Block -Underhood

KR5RearDefoggerRelay

E18RearDefoggerGrid


E17DOutside RearviewMirror Glass - Driver

A9AOutsideRearviewMirror -Driver

A9BOutsideRearviewMirror -Passenger

E17POutside RearviewMirror Glass -Passenger

K9BodyControlModule

KR73IgnitionMainRelay

A90Logic

A26HVACControls


DescriptionandOperationPower Windows Description and Operation

Power Window System ComponentsThe power window system consists of the following components:

• Driver window switch

• Front passenger window switch

• Window regulator motors in each of the doors

Power Window System ControlsThe power window system can be controlled by a power window up or down switch activation.

Window Operation and the Driver Window SwitchThe driver power window switch contains individual window switches for each of the power windows. All windows may be controlled up and down from the driver power window switch. The passenger power window switch (or rearwindow switches if equipped) will only control the up and down operation of their respective power window. The passenger power window contains a reversible power window motor. The direction the window travels is dependentupon the polarity of the control circuits. By reversing polarity of the control circuits the window motor will move up or down. The passenger power window motor is internally circuit breaker protected.

Driver Express Up and Express Down Power Window MotorThe driver power window is controlled by the driver door lock/window switch using inputs from the driver door lock/window switch. The window switch circuits are grounded in the driver door lock/window switch and when active acontrol circuit is switched to B+. The driver door lock/window switch also uses inputs from 2 Hall effect sensors located within the motor. The Hall effect sensors enable the driver door lock/window switch to monitor the windowposition and motor speed for use as an anti-pinch safety feature.

Passenger Express Up and Express Down Power Window MotorThe passenger power window is controlled by the passenger window switch. The window switch circuits are grounded in the passenger window switch and when active a control circuit is switched to B+. The passenger windowswitch also uses inputs from 2 Hall effect sensors located within the motor. The Hall effect sensors enable the passenger window switch to monitor the window position and motor speed for use as an anti-pinch safety feature.


Rear Window Defogger Description and Operation

Rear Window Defogger System ComponentsThe rear window defogger system consist of the following components:

• HVAC controls switch assembly

• Body control module (BCM)

• Rear defogger relay

• Rear window grid

• Driver outside rearview mirror

• Passenger outside rearview mirror

• Underhood fuse block

Rear Window Defogger OperationBattery positive voltage is supplied through the F29UA fuse, in the underhood fuse block, to the rear defogger relay switched input. Control and ground for the rear defogger relay is provided by underhood fuse block. The BCMsupplies 12 volts to the rear window defogger switch signal circuit to the HVAC controls switch assembly. When you depress the rear window defogger switch, the rear window defogger switch pulls the signal circuit low. The BCMwill detect the voltage drop in the signal circuit and will then send a serial data message to the underhood fuse block to energize the rear defogger relay. The contacts within the rear defogger relay will close providing B+ voltageto the rear defogger indicator, the rear defogger grid and if equipped, to the driver and passenger heated outside rearview mirrors.

When you start the engine and press the rear window defogger switch for the first time, the defogger cycle lasts for 15 minutes. Further operation results in 7.5 minute defogger cycles. The rear defogger feature will not time out ifvehicle speed is above 80 km/h (50 mph). The defogger cycle resets to 15 minutes when you cycle the ignition to the OFF position and then to the ON position.


Body SystemsHornsSchematicandRoutingDiagramsHorn Schematics

Horn

LO

C

DES

C

B+

5X1

1

MH02RD

MH02D-GN

6X3

MH03D-GN

1

3

MHE1BK

1

2

MH02RD

MH01GY

PF23RD

7X1

MH02RD

-ATG ATG

X1

X2

F25UB10A

G102

7AX201

J128


KR3HornRelay

P12Horn

X85Steering Wheel AirBag Coil

S33HornSwitch

A90Logic



Body SystemsLightingSchematicandRoutingDiagramsHeadlights/Daytime Running Lights (DRL) Schematics

DRL Controls and Indicators

LO

C

DES

C

PD08PK

7

17

PD09D-BU

2

18

PD10BN

10

19

PD07D-GN

16

16

PD06VT

14

15

PD05BN

15

29

PD04YE

12

28

PD03WH

9

27

PD02RD

11

26

PD01OG

13

25

3 4 5 2 1

5 4 3 2 1

X1

S78Turn Signal/MultifunctionSwitch

P16InstrumentCluster

A90Logic

K9BodyControlModule


DRL - USA

B+

5 1

3 2

B+

LA42L-GN

LA42L-GN

LA43L-GN

LA41PK

1X1

LA45L-BU

1

2X4

LA03YE3

LA40RD

2

LA07PK

5

LA07PK

LA44PK

LA06WH

1

31X8 5X5

5 1

3 2

LO

C

DES

C

DAE2BK

DAE1BK

LAE1BK

LAE2BK

LAE3BK

2

LA05D-GN

3

4

42 2

2

2

2

1 1

1 1

1

F27UB10A

F42UA15A

F40UA10A

F39UA10A

F41UA15AJ124

G102 G101

J100

X70ARelayBlock -Underhood

E13RHeadlamp -Right

E13LHeadlamp -Left

KR42CDaytimeRunningLampsRelay 1

X50BFuse Block -UnderhoodAuxiliary KR49

HeadlampLow BeamRelay

KR48HeadlampHigh BeamRelay

A90Logic

KR42DDaytimeRunningLampsRelay 2




DRL - Canada

B+

4 5 1

3 2

B+

LA42L-GN

LA42L-GN

LA41PK

1X1

LA03YE

3

5X4

LA45L-BU1

LA40RD

2

LA04PK

2

LA04PK

LA06WH

1

31X8 5X5

5 1

3 2

LAE2BK

2

LO

C

DES

C

LA43L-GN

DAE2BK

DAE1BK

LAE1BK

LAE3BK

LA44PK

LA05D-GN

4

3

2 2 2

2 2

1 1

1 1

F27UB10A

F40UA15A

G101

F42UA15A

F39UA10A

F41UA10AJ124

G102

J100


E13RHeadlamp -Right

E13LHeadlamp -Left

KR42CDaytimeRunningLampsRelay 1

X50BFuse Block -UnderhoodAuxiliary KR49

HeadlampLow BeamRelay

KR48HeadlampHigh BeamRelay

A90Logic

KR42DDaytimeRunningLampsRelay 2




Exterior Lights Schematics

Controls and Indicators

LO

C

DES

C

LD01D-BU

32

1

2

LEE2BK

PD08PK

PD09D-BU

PD10BN

PD07D-GN

PD06VT

PD05BN

PD04YE

PD03WH

PD02RD

PD01OG

345 2 1

5 4 3 12

X1

19X1 18 17 16 15 29 28

10 2 7 16 14 15 12 9 11 13

27 26 25

MP19D-BU

LD01D-BU

G205

J225



A90Logic

S26HazardWarningSwitch

K9BodyControlModule

Tire PressureMonitoring

SystemSchematics


Park Lamps

LO

C

DES

C

LDE8BK

LDE7BK

LLE1BK

1

2

LLE2BK

1

LL02PU2

LTE2BK

LTE1BK

1

LT05YE

2

2

B+

LT06YE

3

2

1

LL01PU

LL01OG

LL01PU

LL01VT

LT02PU

4

LT02PU

LT02PU

1

2

LT02PU

X6

LT02VT

LT03VT

MIN MIN

G G

LT02GY

LT03GY

G101 G102 G901 G305

F34UA10A

JX202

8X305

8AX201

1X905

6X402

J901

J302

6X410 6X420


E7LLicense Plate Lamp- Left

E7RLicense Plate Lamp -Right

A90Logic

E4NPark/TurnSignalLamp -Left

E4PPark/TurnSignalLamp -Right

K9BodyControlModule

KR60Tail LampsRelay

E5AATail/StopLamp - Left

E5ABTail/StopLamp -Right


Turn Lamps

LO

C

DES

C

LD18VT

9

3

LD09WH

8

LD10VT

LD17WH

LD10PU

LD09WH

LD18VT

LD09WH

LD10D-GN

LD17WH

LDE8BK

1

LTE1BK

LTE2BK

LDE7BK

1

3

X3

GND

MAJ MAJ

GND

LD09WH

LD10L-GN

14AX201 15AX201

G102 G302 G305 G101

J206 J207

4X410 4X420

25X305 24

K9BodyControlModule

E4RRTurn

SignalLamp -

RightRear

E4LRTurn

SignalLamp -

Left Rear

E4NPark/Turn

SignalLamp -

Left

E4PPark/Turn

SignalLamp -

Right


Stop Lamps

LO

C

DES

C

LTE2BK

4

LS01D-BU

3

LS02RD

LS04RD

4

B+

LS01D-BU

LS02RD

LS02RD

LSE1BK

1

LS03RD

LS04RD

LS04RD

24

LS02RD

23LS02RD

PD38RD

12X1

BS32RD

30X1

AC90RD

E3X3

21 22

LS02RD

MAJ

G

LTE1BK

G

MAJ

LS02RD

LS03RD

F11DA10A

92AX201

G901

15X402

1X907

G305

93AX201

JX101

J303

3X306

J227

G302

5X420 5X410

B103StopLampSwitch

E6CenterHighMountedStopLamp


K9BodyControlModule

K17ElectronicBrakeControlModule

K20EngineControlModule

E5ABTail/StopLamp -Right

E5AATail/StopLamp - Left


Back-up Lamps

LR01L-BU

7

11X4

LR01L-BU

LR01L-BU

LR04D-GN

BA34D-GN

13

LR03YE

LR04D-GN

LR04D-GN

LR04D-GN

LR04YE

LTE1BK

LTE2BK

LO

C

DES

C

F4

22

8

P

RN D

L

3

2

RA14D-GN

BA34D-GN

LR04YE

FD03D-GN/WH

2

1

2

1

LR03WH

LR04WH

JX101

20BX150

G302G305

F44UA10A

16BX150

1AX201

10X305

JX102

J226

J304

1X420 1X410

E5ABackupLamp -Left

E5BBackupLamp -Right

K71TransmissionControlModule



B81Park/NeutralPositionSwitch

ObjectDetection

Schematics


Interior Lights Schematics

Door Switch Controls

PD40WH

7

2

PD15L-GN

2

1

PD14L-BU

5

1

PD13BN

4

1

PD16GY

3

1

PDE8BK

1

PD40WH

PD15L-GN

PD14L-BU

PD13L-GN

PD16D-GN

PD40WH

PD15L-GN

PD16L-GN

LO

C

DES

C

X3

G901

2X303 2X302 5X402

1918 2017X307 21

B28CDoor AjarSwitch -RearCargo

B28FDoor AjarSwitch -RightSliding



B28EDoor AjarSwitch -LeftSliding

K9BodyControlModule


Controls and Courtesy Lamps

LO

C

DES

C

DOORON

3

5

LG01YE

LG02BN

LGE1BK

4

PA02D-BU

12

10

PA01PK

11

1

PA17PK

1

PA17PK

PA01PK

PA01VT

PAE1BK

15

PAE2BK

11

LG03D-BU

LG04BN

PA02D-BU

LG01D-BU

3

LG01D-BU

LG01D-BU

LG02BN

5

LG02BN

1

LI03D-BU

X1

LI02BN

1X2

X2

LG02BN

1X1

1X2

G301

J211

G204 G205

2X600

J305

J306

12X500 5

29X305 30

1X304 2


A90Logic A90Logic


E37RDome/ReadingLamps -Rear

K9BodyControlModule

E37MDome/ReadingLamps -Middle

E37FDome/ReadingLamps -Front


Interior Lights Dimming Schematics

Illumination Controls

LO

C

DES

C

B+ B+ B+

DA09YE

10

DA35YE

2 23X1

18 20

38MAE2BK

39LEE2BK

2

LT02VT

4X6

LT02VT

15X5 X8

PD08PK

7

17

PD09D-BU

2

18

PD10BN

10

19

PD07D-GN

16

16

PD06VT

14

15

PD05BN

15

29

PD04YE

12

28

PD03WH

9

27

PD02RD

11

26

PD01OG

13

25

345 2 1

5 4 3 2 1

MAE1BK

MAE3BK

40

B+ B+ IGN

X1 15X2

DAE1BK

DA09YE

PDE1BK

IGN B+

IGN II/III

DA37OG

B+

DAE2BK

DA19OG

X2

MA02WH

MA02WH

K34 -K34

MA02WH

MA01L-GN

PD32L-GN

F10UB40A

F13DA10A

F10DA10A

F1DA10A

F3DA10A

91AX201

A

69AX201

G205G204 G204

J210

F34UA10A

B

J205

J236 J203


K9BodyControlModule

X50BFuse Block-UnderhoodAuxiliary

KR60TailLampsRelay


A90Logic


A90Logic



Illumination

LO

C

DES

C

LT02VT

2

LEE2BK

11

3

LD07VT

4

8

CA06VT

3

1X2

CAE2BK

13

2X1

CA06YE

8X3 7

CAE2PK

CA06YE

CAE2PK

CA06YE

HAE4BK

16

7

HA30BN

6

15

FC02VT

4

8

7

BS48VT

5

4

BSE6BK

15

3

7

CAE2PK

8 (U1B+UPF)X1

9X1

13 (CWM)X2

LEE2BK

12

FD20RD/BU

1

FD21BN

4

RA03VT

RA03VT

-UD7 UD7

RAE1BK

17

FCE2BK

14

JX202

A

B

G205

J220

J219

J237 S26HazardWarningSwitch

X85SteeringWheel AirBag Coil

S3TransmissionShift Lever

S75TractionControlSwitch

A11Radio

S107Parking AssistOn/Off Switch

S70LSteeringWheelControlsSwitch -Left

S70RSteeringWheelControlsSwitch -Right

A26HVACControls


DescriptionandOperationExterior Lighting Systems Description and Operation

The exterior lighting system consist of the following lamps:

• Backup lamps

• Daytime running lamps

• Hazard warning lamps

• Headlamps

• Park, tail, and license lamps

• Stop lamps

• Turn signal lamps

Low Beam Headlamps – USAFor headlamp operation, the body control module (BCM) monitors two signal circuits from the turn signal/multifunction switch. When the turn signal/multifunction switch is placed in the OFF position, the turn signal/multifunctionswitch headlamps OFF signal circuit is grounded, indicating to the BCM that the exterior lamps should be turned OFF. With the turn signal/multifunction switch in the PARK LAMPS position, the turn signal/multifunction switchpark lamps ON signal circuit is grounded, indicating that the park lamps have been requested. When the turn signal/multifunction switch is in the HEADLAMP position, both the turn signal/multifunction switch park lamps ONsignal circuit and the turn signal/multifunction switch headlamps ON signal circuit are grounded. The BCM responds to the low beam request by sending a serial data message to the underhood fuse block internal logic modulerequesting the low beams be applied. The underhood fuse block logic module responds by applying ground to the low beam relay control circuit which energizes the low beam relay. With the low beam relay energized, the switchcontacts close allowing battery voltage to flow through the low beam fuses. The right low beam control circuit supplies voltage to the daytime running lamps relay 2 coil energizing the relay coil. With the relay coil energized, therelay switch contacts close allowing voltage to flow through to the right low beam headlamp. With the left and right low beam headlamps supplied with voltage, the low beam headlamps illuminate.

Low Beam Headlamps – CanadaFor headlamp operation, the body control module (BCM) monitors two signal circuits from the turn signal/multifunction switch. When the turn signal/multifunction switch is placed in the OFF position, the turn signal/multifunctionswitch headlamps OFF signal circuit is grounded, indicating to the BCM that the exterior lamps should be turned OFF. With the turn signal/multifunction switch in the PARK LAMPS position, the turn signal/multifunction switchpark lamps ON signal circuit is grounded, indicating that the park lamps have been requested. When the turn signal/multifunction switch is in the HEADLAMP position, both the turn signal/multifunction switch park lamps ONsignal circuit and the turn signal/multifunction switch headlamps ON signal circuit are grounded. The BCM responds to the low beam request by sending a serial data message to the underhood fuse block internal logic modulerequesting the low beams be applied. The underhood fuse block logic module responds by applying ground to the low beam relay control circuit which energizes the low beam relay. With the low beam relay energized, the switchcontacts close allowing battery voltage to flow through the low beam fuses. Battery voltage is then applied from the fuses, through the low beam control circuits illuminating the low beam headlamps.

High Beam Headlamps – USAThe high beam and flash to pass functions are contained within the turn signal/multifunction switch. The BCM provides the turn signal/multifunction switch with two signal circuits, the high beam signal circuit and the flash to passsignal circuit. When the low beam headlamps are ON and the turn signal/multifunction switch is placed in the high beam position, ground is applied to the BCM through the high beam signal circuit. The BCM responds to the highbeam request by sending a serial data message to the underhood fuse block internal logic module requesting the high beams be applied. The underhood fuse block logic module responds to the high beam request by applyingground to the high beam relay control circuit which energizes the high beam relay. With the high beam relay energized, the switch contacts close allowing battery voltage to flow through the high beam fuses to the high beamcontrol circuits illuminating the high beam headlamps.

High Beam Headlamps – CanadaThe high beam and flash to pass functions are contained within the turn signal/multifunction switch. The BCM provides the turn signal/multifunction switch with two signal circuits, the high beam signal circuit and the flash to passsignal circuit. When the low beam headlamps are ON and the turn signal/multifunction switch is placed in the high beam position, ground is applied to the BCM through the high beam signal circuit. The BCM responds to the highbeam request by sending a serial data message to the underhood fuse block internal logic module requesting the high beams be applied. The underhood fuse block logic module responds to the high beam request by applyingground to the high beam relay control circuit which energizes the high beam relay. With the high beam relay energized, the switch contacts close allowing battery voltage to flow through the high beam fuses to the high beamcontrol circuits. The right high beam control circuit supplies voltage to the daytime running lamps relay 2 coil energizing the relay coil. With the relay coil energized, the relay switch contacts close allowing voltage to flow through tothe right high beam headlamp. With the left and right high beam headlamps supplied with voltage, the high beam headlamps illuminate.

Daytime Running Lamps – USAWhen the turn signal/multifunction switch is placed in the OFF position, the turn signal/multifunction switch headlamps OFF signal circuit is grounded, indicating to the body control module (BCM) that the exterior lamps should beturned OFF. The BCM responds to the exterior lamps OFF request by sending a serial data message to the underhood fuse block internal logic module requesting all exterior lamps be turned OFF. The underhood fuse block logicmodule responds by turning OFF all exterior lamps and at the same time applying ground to the daytime running lamps relay 1 control circuit energizing the relay. With the daytime running lamps relay 1 energized, the switchcontacts close allowing battery voltage to back feed through the right high beam ground circuit to the right high beam headlamp. The voltage continues through the right high beam to the left and right high beam fuses whichsupply the left high beam. The left high beam provides the ground path that completes the circuit which causes the left and right high beam headlamps to illuminate for daytime running lamp operation.

When the turn signal/multifunction switch is placed in the PARK or HEAD positions, the underhood fuse block logic module removes ground from the daytime running lamps relay 1 control circuit which de-energizes the relay.With the daytime running lamps relay 1 de-energized, the switch contacts open. With the switch contacts in the open position the circuit becomes the ground path for the right headlamp for normal low/high beam operation.

Daytime Running Lamps – CanadaWhen the turn signal/multifunction switch is placed in the OFF position, the turn signal/multifunction switch headlamps OFF signal circuit is grounded, indicating to the body control module (BCM) that the exterior lamps should beturned OFF. The BCM responds to the exterior lamps OFF request by sending a serial data message to the underhood fuse block internal logic module requesting all exterior lamps be turned OFF. The underhood fuse block logicmodule responds by turning OFF all exterior lamps and at the same time applying ground to the daytime running lamps relay 1 control circuit energizing the relay. With the daytime running lamps relay 1 energized, the switchcontacts close allowing battery voltage to back feed through the right low beam ground circuit to the right low beam headlamp. The voltage continues through the right low beam to the left and right low beam fuses which supplythe left low beam. The left low beam provides the ground path that completes the circuit which causes the left and right low beam headlamps to illuminate for daytime running lamp operation.

When the turn signal/multifunction switch is placed in the PARK or HEAD positions, the underhood fuse block logic module removes ground from the daytime running lamps relay 1 control circuit which de-energizes the relay.With the daytime running lamps relay 1 de-energized, the switch contacts open. With the switch contacts in the open position the circuit becomes the ground path for the right headlamp for normal low/high beam operation.

Flash to PassWhen the turn signal/multifunction switch is momentarily placed in the flash to pass position, ground is applied to the BCM through the flash to pass signal circuit. The BCM responds to the flash request by sending a serial data


message to the underhood fuse block internal logic module requesting the high beams be applied. The underhood fuse block logic module responds to the flash to pass request by applying ground to the high beam relay controlcircuit which energizes the high beam relay illuminating the high beams for a brief moment or until the flash to pass switch is released.

Hazard LampsThe hazard flashers may be activated in any power mode. The hazard warning switch signal circuit is momentarily grounded when the hazard warning switch is pressed. The body control module (BCM) responds to the hazardwarning switch signal input by sending a serial data message to the internal logic module of the underhood fuse block. The internal logic at the underhood fuse block responds by supplying battery voltage to all four turn signallamps in an ON and OFF duty cycle. When the hazard warning switch is activated, the BCM sends a serial data message to the instrument cluster requesting both turn signal indicators to be cycled ON and OFF.

Park, Tail, and License LampsWith the park lamps ON, the Body Control Module (BCM) sends a serial data message to the underhood fuse block internal logic module requesting the park lamps be commanded on. The underhood fuse block internal logicmodule responds to the request by applying ground to the tail lamps relay coil energizing the coil. With the tail lamps relay coil energized, the relay switch contacts close allowing battery voltage to flow through the relay switchcontacts to the F34 UA fuse on to the front and rear parks lamps as well as the interior components that have backlighting.

Stop LampsThe stop lamp switch is used to sense the action of the driver application of the brake pedal. Battery voltage is supplied to the stop lamp switch at all times through the F11 DA fuse located in the instrument panel fuse block.When the brakes are applied, the stop lamp switch contacts close allowing battery voltage to flow through the left and right stop lamp control circuits as well as the center high mounted stop lamp control circuit illuminating the leftand right stop lamps and the center high mounted stop lamp. Once the driver releases the brake pedal, the stop lamp switch contacts open and battery voltage is removed from the stop lamps control circuit.

Turn Signal LampsGround is applied at all times to the turn signal/multifunction switch. The turn signal lamps may only be activated with the ignition switch in the ON or START positions. When the turn signal/multifunction switch is placed in eitherthe TURN RIGHT or TURN LEFT position, ground is applied to the body control module (BCM) through either the right turn or left turn signal switch signal circuit. The BCM responds to the turn signal switch input by applying apulsating voltage to the front and rear turn signal lamps through there respective control circuits. When a turn signal request is received by the BCM, a serial data message is sent to the instrument panel requesting the respectiveturn signal indicator be pulsed ON and OFF.

Backup LampsWith the ignition ON, battery voltage is supplied to the backup lamp switch through the F44 UA fuse located in the underhood fuse block. With the ignition ON and the transmission in the reverse position, the backup lamp switchcontacts close allowing battery voltage to flow through the backup lamps control circuit illuminating the backup lamps. Once the driver moves the gear selector out of the reverse position, the backup lamp switch contacts openand battery voltage is removed from the backup lamps control circuit. The engine must be running for the backup lamps to operate.

Battery Run Down Protection/Inadvertent Power

To provide battery run down protection, the exterior lamps will be deactivated automatically under certain conditions. The BCM monitors the state of the turn signal/multifunction switch. If the park or headlamp switch is ON whenthe ignition switch is placed in either the CRANK or RUN position and then placed in the OFF position, the BCM initiates a 5 minute timer. At the end of the 5 minutes, the BCM will turn off the control power output to the parklamp controls as well as the headlamp relay coils, deactivating the exterior lamps. This feature will be cancelled if any power mode other than OFF becomes active or the turn signal/multifunction switch status changes.


Interior Lighting Systems Description and Operation

Interior Courtesy LampsThe interior courtesy lighting system consist of following components:

• Dome lamps

• Reading lamps

• Rear compartment courtesy lamp

Dome LampsThe dome lamp switch has 3 positions: DOOR, OFF, and ON. The ON position provides a ground for continuous operation and the dome lamps will remain illuminated until the switch is placed in either the DOOR or OFF position.When in the DOOR position, the dome lamps operation is controlled by the body control module (BCM). When any door is opened, the door ajar switch contacts close and the BCM receives a door-open input. The BCMilluminates the dome lamps when any door is opened or a door lock/unlock request is activated with the key fob. After all doors have been closed, the dome lamps will remain illuminated approximately 3 seconds after the last doorcloses. When the driver places the dome lamp switch in the OFF position, the dome lamps will be disabled. In the event that the dome lamps were to remain illuminated for more than 10 minutes with the vehicle ON/OFF switchin the OFF position, the BCM will deactivate the dome lamps control circuit to prevent total battery discharge.

Reading LampsThe body control module (BCM) supplies battery voltage to the front reading lamp via the courtesy lamp control circuit. The front reading lamps are controlled by individual switches that are activated by the operator whenadditional cabin lighting is required. In the event that any of these courtesy lamps were to remain illuminated for more than 10 minutes with the ignition switch in the OFF position, the BCM will deactivate the courtesy lamp controlcircuit to prevent total battery discharge.

Rear Compartment Courtesy LampWhen the rear compartment is opened, the rear compartment lid latch opens providing a rear compartment open input signal to the BCM. The BCM responds by applying battery voltage to the rear compartment courtesy lampcontrol circuit illuminating the rear compartment courtesy lamp.

Keyless Entry Interior IlluminationWhen the operator uses the keyless entry transmitter in order to unlock the doors, the BCM receives a door-unlock signal. The BCM must receive inputs from various systems that indicate that the ignition switch is OFF, thecourtesy lamp switch is OFF, and all doors are closed before the BCM will activate the interior lamps. After all doors have been closed, the courtesy lamps will turn OFF immediately if the ignition switch is turned to the ONposition, the door locks are LOCKED, or approximately 20 seconds after the last door closes. The BCM will turn off the courtesy lamps through the theater dimming feature.

Interior Component BacklightingThe interior component backlighting system consist of following components:

• Hazard switch

• HVAC control switch assembly

• Instrument cluster

• Radio

• Steering wheel control switch – left

• Steering wheel control switch – right

• Traction control switch

• Transmission shift leverWith the park lamps ON, the Body Control Module (BCM) sends a serial data message to the underhood fuse block internal logic module requesting the park lamps be commanded on. The underhood fuse block internal logicmodule responds to the request by applying ground to the tail lamps relay coil energizing the coil. With the tail lamps relay coil energized, the relay switch contacts close allowing battery voltage to flow through the relay switchcontacts to the F34 UA fuse on to the front and rear parks lamps as well as the interior components that have backlighting. The instrument cluster receives the park lamps request via serial data from the underhood fuse blockinternal logic module and responds by applying ground to the interior backlighting control circuit. With ground applied to the interior backlighting control circuit all components with backlighting on the circuit illuminate.

Battery Rundown Protection/Inadvertent PowerTo provide battery run down protection, the interior lamps will be deactivated automatically under certain conditions. In the event that any of these lamps were to remain illuminated for a period of more than 10 minutes with theignition switch in the OFF position, the BCM will deactivate the inadvertent power supply voltage circuit to prevent total battery discharge. If the ignition switch is turned to any position other than OFF, or if a lamp switch isactivated during this 10 minute period, the timer resets for another 10 minutes.


Body SystemsMirrorsSchematicandRoutingDiagramsOutside Rearview Mirror Schematics

Power, Ground, Power Mirror Switches and Motors

LO

C

DES

C

IGN I/II

RA02D-BU

KAE1BK

12

KA06D-GN

5

KA05PK

6

KA07GY

2

KA06D-GN

KA05PK

KA07GY

KA03L-GN

4

KA02WH

73

KA03L-GN

KA02WH

KA04RD

KA04RD

KA01D-BU

13

M M M M

KA06L-GN

KA05D-BU

KA07YE

KA03L-GN

KA02D-BU

KA04YE

F5DA10A

G204

J232

5X501 3 4 5X601 3 4

8X510 6 7 8X610 6 7


S52OutsideRearviewMirrorSwitch

M77DOutsideRearviewMirrorMotor -Driver


M77POutsideRearviewMirrorMotor -Passenger



DescriptionandOperationOutside Mirror Description and Operation

Power Mirror System ComponentsThe power mirror system consists of the following components:

• Outside rearview mirror switch

• Mirror selector switch

• Driver outside rearview mirror

• Passenger outside rearview mirrorEach of the outside rearview mirror contains two motors. The vertical motor operates the mirror in the up and down directions, and the horizontal motor operates the mirror in the left and right directions.

Power Mirros Without A45 Block Diagram

S52OutsideRearviewMirrorSwitch



Power Mirror System ControlsThe outside rearview mirror switch is a four position directional switch: Up, Down, Left and Right.

The mirror select switch is a three position switch: left, neutral/fold, and right.

Power Mirror System OperationThe outside rearview mirror switch receives battery voltage from the underhood fuse block The power mirror switch also receives a constant ground.

The four positions of the direction switch have dual switch contacts. Each of the contacts are connected to opposing sides of the appropriate power mirror motors through the selector switch. The selector switch completes thesecircuits depending on the position of the selector switch, L or R.

If the selector switch is placed in the L position and the up switch is pressed, battery voltage will be supplied to the left outside rearview mirror vertical motor through the left mirror motor vertical control circuit and ground throughthe left mirror motor common control circuit. If the down switch is pressed, battery voltage will be supplied to the left outside rearview mirror vertical motor through the left mirror motor common control circuit and ground throughthe left mirror motor vertical control circuit.

The remainder of the mirror functions operate in the same manner as described above. Placing the power mirror switch in opposing positions, left/right or up/down, will reverse the polarity to the mirror motor, reversing the directionof movement.

Heated Mirrors (If Equipped)The heated mirrors are controlled through the rear defog relay. Whenever the rear window defogger is turned on battery voltage is supplied to the mirror heater elements through the left and right mirror heater element controlcircuits.


Body SystemsVehicle AccessSchematicandRoutingDiagramsDoor Lock/Indicator Schematics

Door Lock Switches

PD11RD

5

PD12PU

8

6

PD17PK

6

13

PD28BK

14

5

PD11RD

7

PD30PU

4

LO

C

DES

C

PAE2BK

11

PAE1BK

15

PDE7BK

4

PD29RD

PD30PU

PD12PU

PD12VT

PD11RD

PD17WH

PD28WH

PD29RD

9X1

J213

G205

J212

G204

2X500 112X601 1 2X501 1

A90Logic


A90Logic

B29DDoorLock KeyCylinderSwitch -Driver


K9BodyControlModule

A23DDoorLatchAssembly- Driver


Actuators

LO

C

DES

C

PD23YE

PD22D-BU

M

PD19D-GN

1

2

PD21YE

13

PD21WH

PD27YE

PD27YE

PD23YE

2

PD25YE

1

3

14

PD18BN

1

PD25YE

PD24BU

M

PD18D-BU

PD24D-BU

6

PD20BNBN

PD26D-BU

PD20D-BU

PD26D-BU/WH

PD26D-BU

PD21YE

PD19WH

PD27YE

PD27YE

PD18D-BU

PD22D-BU

PD24D-BU

PD24D-BU

MMMM

6

5

3

2

M

X2

1X600

5X306

3X500 4X600

4X500 5X403

2X403

J217

J311

J312

J218

6X306 4


M14FDoor Lock Actuator- Right Sliding

M14EDoor LockActuator - LeftSliding

K9BodyControlModule

X87LBSliding Door Jamb ContactPlate - Left Body

X87RBSliding Door Jamb ContactPlate - Right Body

X87LBSliding Door Jamb ContactPlate - Left Body

X87RBSliding Door Jamb ContactPlate - Right Body

M14CDoor LockActuator -RearCargo

M13Door LatchAssembly -Rear Cargo


M14CDoor LockActuator -RearCargo

M14PDoor LockActuator -Passenger

M14PDoor LockActuator -Passenger

A23PDoor LatchAssembly -Passenger

M13Door LatchAssembly -Rear Cargo

M14DDoorLockActuator- Driver

X87LDSlidingDoor JambContactPlate -Left Door

X87RBSlidingDoor JambContactPlate -Right Body


Door Switch Controls

LO

C

DES

C

PD40WH

7

1

PD15L-GN

2

1

PD14L-BU

5

1

PD13BN

1

PD16GY

3

1

PDE8BK

2

PD40WH

PD15L-GN

PD14L-BU

PD13L-GN

PD16GY

PD40WH

PD15L-GN

PD16L-GN

4X3

G901

2X303 2X302

5X402

1918 2017X307 21

B28CDoor AjarSwitch -RearCargo

B28FDoor AjarSwitch -RightSliding



B28EDoor AjarSwitch -LeftSliding

K9BodyControlModule


DescriptionandOperationDoor Ajar Indicator Description and Operation

Door Ajar Indicator System ComponentsThe door ajar indicator system consists of the following components:

• The body control module (BCM)

• The instrument panel cluster (IPC)

• The driver information center (DIC)

• The door ajar switch

Door Ajar OperationThe body control module (BCM) receives a discrete input from the door ajar switch to indicate the status of the door. The BCM then communicates this status to the instrument panel cluster (IPC) via GMLAN serial data. TheIPC, upon receipt of this message, will illuminate the door ajar message in the driver information center (DIC) and also send a GMLAN serial data message to the radio to activate the door ajar audible warning when the followingconditions are met:

• The transmission is shifted out of PARK.

• The vehicle speed is greater than 8 km/h (5 mph).


Power Door Locks Description and Operation

Door Lock System ComponentsThe power door lock system consists of the following components:

• Driver door lock switch

• Passenger door lock switch

• Key cylinder switch

• Body control module (BCM)

• Driver door latch assembly

• Passenger door lock actuator

• Left sliding door lock actuator

• Right sliding door lock actuator

• Rear cargo door lock actuator

Door Lock and Unlock OperationThe BCM supplies a 1.5 V signal to each of the door lock and door unlock signal circuits. When the door lock switches are in the open position, the voltage level in the signal circuit will be near 1.5 V. When any door lock switchis pressed to the lock or unlock position, the voltage level in the appropriate signal circuit will drop to 0 V and the BCM will detect the voltage drop and command the door lock actuators to perform the requested lock or unlockcommand.

The BCM powers the reversible door lock actuators by providing battery positive voltage and ground to the appropriate lock and unlock control circuits of the door lock actuators. The lock and unlock control circuits of the rearcargo door, the sliding door and passenger door lock actuators are all connected together. Transitioning of the lock actuators to the lock or unlocked position depends upon which control circuits receive voltage and which controlcircuits receive ground.

The following three circuits are used to operate the lock and unlock control system:

• Driver door unlock

• Passenger/side/rear door unlock

• All door lockThe driver door lock actuator is isolated so it can be unlocked by itself using the keyless entry transmitter.


Body SystemsWipers and WashersSchematicandRoutingDiagramsWiper/Washer Schematics

Wiper and Washer Motor Controls

B+

DA44D-BU

2X1

DA45PK

3 4X1

WA11D-GN2

WA12YE

1

1

WA11D-GN

WA12YE

PD05BN

15PD09D-BU

2PD06VT

14PD07D-GN

16PD04YE

12PD01OG

13PD10BN

10PD08PK

7PD03WH

9PD02RD

11

WAE2BK

WAE1BK

DAE2BK

DAE1BK

LO

C

DES

C

B+

5

4

29X1 18

1

15

2

16

4 1

5 3

3 2

IGN II/III

DA37OG

DA37OG

5X5 1X8

8

28 25 19 17 27 26

4X5

WA03YE

1

12

WA02WH

5

5

WA04RD

4

2

M

X6

MF33UA30A

99AX201

G204G102G201

F1DA10A

F4DA10A

26AX201 100A



KR12BWindshieldWiperRelay

A90Logic

KR12CWindshieldWiperSpeedControlRelay

DataCommunication

Schematics


K9BodyControlModule


G24WindshieldWasher Pump

M75WindshieldWiper Motor


DescriptionandOperationWiper/Washer System Description and Operation

Wiper/Washer System ComponentsThe wiper/washer system consists of the following electrical components:

• Windshield Wiper Relay

• Windshield Wiper Speed Control Relay

• Windshield Washer Pump

• Windshield Wiper Motor

• Windshield Wiper/Washer Switch

• Body Control Module (BCM)

• Windshield Washer Fluid Level Switch

• Instrument Cluster

• Underhood Fuse Block (Contains Windshield Washer Pump PCB Relay)

Modes of OperationThe normal wiper system function positions are as follows:

• INTERMITTENT

• LOW

• HIGH

• WASH

Windshield Wiper SystemThe body control module (BCM) controls the wiper motor via printed circuit board (PCB) relays (Windshield Wiper Relay and Windshield Wiper Speed Control Relay). The BCM determines the wipe/wash system mode of operationby monitoring several signals from the Windshield Wiper/Washer Switch.

The Windshield Wiper operates through the BCM.

1. BCM reads the combination switch position and transmits the front wiper request signal (LO/High/Intermittent/Park) to underhood fuse block using CAN communication.

2. BCM transmits the front wiper request signal (LO/High/Intermittent/Park) to underhood fuse block using CAN communication

3. Underhood fuse block turns ON the front wiper relay

4. The front wiper operates as LO/High/Intermittent/Park based on the wiper switch request.

High Speed Wiper Operation

1. BCM reads the combination switch position (front wiper switch in HI) and transmits the front wiper request signal High to underhood fuse block using CAN communication.

2. BCM transmits the front wiper request signal High to underhood fuse block using CAN communication

3. Underhood fuse block turns ON the front wiper speed relay and the front wiper high relay

Low Speed Wiper Operation

1. BCM reads the combination switch position (front wiper switch in LO) and transmits the front wiper request signal Low to underhood fuse block using CAN communication.

2. BCM transmits the front wiper request signal Low to underhood fuse block using CAN communication

3. Underhood fuse block turns ON the front wiper relay and the front wiper relay and the front wiper Low speed.

Intermittent Wiper Operation

1. BCM reads the combination switch position (front switch is turned INT) and transmits the front wiper request signal intermittent to underhood fuse block using CAN communication.

2. BCM transmits the front wiper request signal intermittent to underhood fuse block using CAN communication

3. Underhood fuse block turns ON the front wiper relay only once.

4. BCM detects stop position of the front wiper motor based on the front wiper stop position signal received from Underhood fuse block

5. BCM transmits the front wiper request signal (INT) again after the delay interval

Wiper Park Operation

1. BCM reads the combination switch position (front wiper switch in OFF) and transmits the front wiper request signal intermittent to underhood fuse block using CAN communication.

2. BCM monitors wiper switch position by combination switch reading position function

3. BCM stops transmitting the front wiper request signal to the Underhood fuse block

4. Underhood fuse block detects the front wiper auto stop signal from the position of the front wiper motor.

5. When the front wiper request signal is stopped, Underhood fuse block turns ON the front wiper relay until the front wiper motor returns to the stop position.


6. Underhood fuse block turns the front wiper relay OFF when the front wiper motor has reached the stop position.

Wiper Block Diagram


K9BodyControlModule


M75WindshieldWiper Motor

Windshield Washer SystemThe windshield washer pump is not controlled by the BCM, it is only controlled the turn signal multifunction switch. The BCM receives the washer switch signal, but only to send the underhood fuse block a message to control thewipers during the wash.

The body control module (BCM) monitors the switch signal request during the wash request in order to operate the wiper.

When Ignition is on, Battery voltage is supplied. the B+ supply voltage to the windshield washer pump through a 10 A circuit breaker located in the instrument panel fuse block. When the washer switch is pressed, battery voltageis applied through the switch contacts the windshield washer pump control circuit to operate the wash. When the washer switch is in a inactive state, the switch contacts are opened to the switch ground circuit.

Diagnostic AidsNote: The windshield washer pump uses washer fluid as a coolant and lubricant, do not activate washer pump for long periods without washer fluid in the windshield washer bottle as the washer pump will overheat and become

damaged.

If the windshield washer pump activates but does not spray fluid, inspect for the following:

• Disconnected washer hose

• Cut or perforated washer hose

• Obstructed washer hose

• Dirt or debris in washer bottle obstructing washer pump inlet

• Obstructed washer nozzles


Washer Block Diagram


G24WindshieldWasherPump

Washer Fluid Level IndicatorThe check washer fluid message is controlled by the instrument cluster using signal from the Windshield Washer Fluid level Sensor. The washer fluid level signal circuit is supplied voltage through a resistor then monitored withinthe instrument cluster. The Windshield Washer Fluid level Sensor is normally close so the instrument cluster detects voltage on the Windshield Washer Fluid level Sensor signal circuit whenever the washer fluid level sensor isnot low. When the washer fluid reaches the point where the driver should be informed that the washer fluid is low, the washer fluid level sensor opens. When the washer fluid level sensor is closed the washer fluid level signalcircuit voltage is pulled low, and the instrument cluster displays the LOW WASHER FLUID INDICATOR message on the driver information center. In order to prevent the LOW WASHER FLUID INDICATOR message from beingdisplayed while sloshing is occurring in the washer fluid container, the instrument cluster is programed with a 1 min delay before changing states of the check washer fluid message during an ignition cycle.


Washer Fluid Level Block Diagram


B118BWindshieldWasherFluid LevelSwitch


BrakesAntilock Brake SystemDescriptionandOperationABS Description and OperationElectronic Brake Control Module is integrated with the Brake Pressure Modulator and comprehensively controls stabilitrak function, TCS function, ABS function and EBD function.

Electronic Brake Control Module

• Brake fluid pressure is controlled according to signals from each sensor.

• If malfunction is detected, the system enters fail-safe mode.ACTUATORThe following components are integrated with ABS actuator.

• PumpReturns the brake fluid reserved in reservoir to master cylinder by reducing pressure.

• MotorActivates the pump according to signals from ABS actuator and Electronic Brake Control Module .

• Motor RelayOperates the motor ON/OFF according to signals from ABS actuator and Electronic Brake Control Module .

• Actuator Relay (Main Relay)Operates each valve ON/OFF according to signals from ABS actuator and Electronic Brake Control Module .

• ABS IN ValveSwitches the fluid pressure line to increase or hold according to signals from control unit.

• ABS OUT ValveSwitches the fluid pressure line to increase, hold or decrease according to signals from control unit.

• Cut Valve 1, Cut Valve 2Shuts off the ordinary brake line from master cylinder, when stabilitrak function and TCS function are activated.

• Suction Valve 1, Suction Valve 2Supplies the brake fluid from master cylinder to the pump, when stabilitrak function and TCS function are activated.

• Return Check ValveReturns the brake fluid from brake caliper and wheel cylinder to master cylinder by bypassing orifice of each

valve when brake is released.

• ReservoirTemporarily reserves the brake fluid drained from brake caliper, so that pressure efficiently decreases when

decreasing pressure of brake caliper and wheel cylinder.

• Pressure SensorDetects the brake fluid pressure and transmits signal to ABS actuator and Electronic Brake Control Module .

Wheel Sensor and Sensor Rotor

• Wheel sensor of front wheel is installed on steering knuckle.

• Sensor rotor of front wheel is integrated in wheel hub assembly.

• Wheel sensor of rear wheel is installed on back plate of rear brake.

• Sensor rotor of rear wheel is installed on rear brake drum.

• Never measure resistance and voltage value using a tester because sensor is active sensor.

• Downsize and weight reduction is aimed. IC for detection portion and magnet for sensor rotor are adopted.

• Power supply is supplied to detection portion so that magnetic field line is read. Magnetic field that is detected is converted to current

• When sensor rotor rotates, magnetic field changes. Magnetic field change is converted to current signals (rectangular wave) and is transmitted to ABS actuator and Electronic Brake Control Module . Change of magneticfield is proportional to wheel speed.

Stop Lamp Switch


Detects the operation status of brake pedal and transmits converted electric signal to ABS actuator and Electronic Brake Control Module .

Steering Angle SensorDetects the following information and transmits steering angle signal to ABS actuator and Electronic Brake Control Module via CAN communication.

• Steering wheel rotation amount

• Steering wheel rotation angular velocity

• Steering wheel rotation directionStabilitrak OFF Switch

• Non-operational status or standby status of stabilitrak and TCS functions can be selected using stabilitrak OFF switch. stabilitrak OFF indicator lamp indicates the operation status of function. (ON: Non-operational status,OFF: Standby status)

• stabilitrak OFF indicator lamp turns OFF (standby status) when the engine is started again after it is stopped once while stabilitrak OFF indicator lamp is ON (non-operational status).Brake Fluid Level SwitchDetects the brake fluid level in reservoir tank and transmits converted electric signal from combination meter to ABS actuator and Electronic Brake Control Module via CAN communication.

Parking Brake SwitchDetects the operation status of parking brake switch and transmits converted electric signal from combination meter to ABS actuator and Electronic Brake Control Module via CAN communication.

YAW RATE/SIDE/DECEL G SENSORYaw rate/side/decel G sensor calculates the following information that affects the vehicle, and transmits a signal to ABS actuator and Electronic Brake Control Module via communication lines.

• Vehicle rotation angular velocity (yaw rate signal)

• Vehicle lateral acceleration (side G signal) and longitudinal acceleration (decel G signal)


BrakesDisc BrakesDescriptionandOperationDisc Brake System Description and Operation

System Component DescriptionThe disc brake system consists of the following components:

Disc Brake Pads: Applies mechanical output force from the hydraulic brake calipers to friction surfaces of brake rotors.

Disc Brake Rotors: Uses mechanical output force applied to friction surfaces from the disc brake pads to slow speed of tire and wheel assembly rotation.

Disc Brake Pad Hardware: Secures disc brake pads firmly in proper relationship to the hydraulic brake calipers. Enables a sliding motion of brake pads when mechanical output force is applied.

Disc Brake Caliper Hardware (Floating Caliper): Provides mounting for hydraulic brake caliper and secures the caliper firmly in proper relationship to caliper bracket. Enables a sliding motion of the brake caliper to the brakepads when mechanical output force is applied.

System Operation (Floating Caliper)Mechanical output force is applied from the hydraulic brake caliper pistons to the inner brake pads. As the pistons press the inner brake pads outward, the caliper housings draw the outer brake pads inward. This allows the outputforce to be equally distributed. The brake pads apply the output force to the friction surfaces on both sides of the brake rotors, which slows the rotation of the tire and wheel assemblies. The correct function of both the brake padand brake caliper hardware is essential for even distribution of braking force.

System Operation (Fixed Caliper)Mechanical output force is applied from the hydraulic brake caliper inboard and outboard pistons to the inner and outer brake pads. The brake calipers are a fixed, opposed-piston design, allowing the output force to be equallydistributed through the distribution of the pressurized brake fluid within the caliper. The brake pads apply the output force to the friction surfaces on both sides of the brake rotors, which slows the rotation of the tire and wheelassemblies. The correct function of the brake pad hardware and of the brake caliper inboard and outboard pistons is essential for even distribution of braking force.


BrakesDrum BrakesDescriptionandOperationDrum Brake System Description and Operation

System Component DescriptionThe drum brake system consists of the following:

Drum Brake Shoes: Applies mechanical output force, from hydraulic brake wheel cylinders, to friction surfaces of brake drums.

Brake Drums: Uses mechanical output force applied to friction surface from drum brake shoes to slow speed of tire and wheel assembly rotation.

Brake Drum Hardware: Secures drum brake shoes firmly in proper relationship to hydraulic brake wheel cylinders. Enables sliding motion of brake shoes needed to expand toward friction surface of drums when mechanicaloutput force is applied. Provides return of brake shoes when mechanical output force is relieved.

Brake Drum Adjusting Hardware: Provides automatic adjustments of brake shoes to brake drum friction surface whenever brake apply occurs.

System OperationMechanical output force is applied from the hydraulic brake wheel cylinder pistons to the top of the drum brake shoes. The output force is then distributed between the primary and secondary brake shoes as the shoes expandtoward the friction surface of the brake drums. The brake shoes apply the output force to the friction surface of the brake drums, which slows the rotation of the tire and wheel assemblies. The proper friction of both the drumbrake hardware and adjusting hardware is essential to the proper distribution of braking force.


BrakesHydraulic BrakesSchematicandRoutingDiagramsHydraulic Brake Schematics

Hydraulic Brake

LO

C

DES

C

IGN II/III

BRAKE

40

MAE2BK

39

MAE1BK

38

MA06BN

1

25

MA06BN

MAE5L-GN

2

MA07L-BU

1

24

MA02WH

L

MA02WH

18

IGN

MAE3BK

MA02WH

K34 -K34

F3DA10A

G205

34AX201

G102

J236

J205


P9Driver InformationCenter Display

DataCommunication

Schematics

B20BrakeFluid LevelSwitch

B80ParkBrakeSwitch

A90Logic



DescriptionandOperationBrake Assist System Description and Operation

System Component DescriptionThe brake assist system consists of the following:

Brake Pedal: Receives, multiplies and transfers brake system input force from driver.

Brake Pedal Pushrod: Transfers multiplied input force received from brake pedal to brake booster.

Vacuum Brake Booster: Uses source vacuum to decrease effort required by driver when applying brake system input force.

At rest, source vacuum is applied to both sides of the vacuum diaphragm for single boosters, or to both sides of each of the diaphragms for tandem boosters. Return springs maintain the booster in a rest position.

When brake system input force is applied, vacuum to the rear of the diaphragm(s) is cut off, and air at atmospheric pressure is admitted in its place. This provides a decrease in brake pedal effort required. When input force isremoved, vacuum again replaces atmospheric pressure within the booster.

Vacuum Source: Supplies force used by vacuum brake booster to decrease brake pedal effort.

The primary source for vacuum is typically the vehicle's internal combustion engine. Some vehicles may use a vacuum pump to ensure and adequate supply of vacuum under various operating conditions, such as during coldstart-up, heavy throttle, and high altitude.

Vacuum Pump Relay: Vehicles equipped with a vacuum pump will typically be equipped with a relay used to provide voltage to the vacuum pump motor, when commanded by the powertrain controller.

Vacuum Monitoring System: Provides a feedback voltage signal relative to the amount of vacuum available for the vacuum power brake booster.

This typically consists of a vacuum sensor mounted either into the power vacuum brake booster, integrated with the vacuum check valve, or in-line within the vacuum hose. The sensor feedback is typically monitored by thepowertrain control module(s).

Vacuum Source Control: If equipped with a system to monitor available levels of vacuum for the brake assist system, the powertrain control module(s) typically perform the primary monitoring function.

The powertrain controller will typically monitor the feedback signal of a vacuum sensor, as it relates to available vacuum at the vacuum power brake booster. The powertrain controller uses the information to make sure availablevacuum remains above predetermined levels. If additional vacuum is required, the powertrain controller may reactivate engine cylinders, if equipped, or command a vacuum pump ON, if equipped, and/or may alter the operation ofvarious other engine controls and devices, as necessary.

Vacuum Source Delivery System: Enables delivery and retention of source vacuum for vacuum brake booster.

This typically consists of a vacuum check valve and a vacuum hose or pipe. If a vacuum pump is used, additional check valves may be used.

System OperationBrake system input force from the driver is multiplied by the brake pedal and transferred by the pedal pushrod to the hydraulic brake master cylinder. Effort required to apply the brake system is reduced by the operation of thevacuum brake booster.

When brake system force is applied, vacuum to the rear of the diaphragm(s) is cut off, and air at atmospheric pressure is admitted in its place. The vacuum acts to pull the diaphragm(s) forward, while the atmospheric pressureacts to push from behind. As a result, the amount of effort required by the driver is reduced. When input force is removed, vacuum again replaces atmospheric pressure within the vacuum power brake booster to help return thebooster to rest. Return springs maintain the system in a rest position.

If the vehicle is equipped with a vacuum monitoring system, the powertrain control module(s) typically will alter powertrain functions and/or command the vacuum pump ON, if equipped, to provide for the vacuum needs of thebrake assist system, as operating conditions warrant.


Brake Warning System Description and Operation

Brake Warning IndicatorThe instrument cluster turns the brake warning indicator ON when the following occurs:

• The instrument cluster performs the bulb check. The brake warning indicator illuminates briefly.

• When the Electronic Brake Control Module (EBCM) detects low brake fluid level it sets a DTC and sends a serial data message to the instrument cluster, which will illuminate the red brake indicator.

• The instrument cluster detects that the parking brake is engaged and illuminates the red brake indicator..

Driver Information Center MessagesWhen the Electronic Brake Control Module (EBCM) detects low brake fluid level it sets a DTC and sends a serial data message to the Driver Information Center , which will display Brake Fluid Low message.


Hydraulic Brake System Description and Operation

System Component DescriptionThe hydraulic brake system consists of the following:

Hydraulic Brake Master Cylinder Fluid Reservoir: Contains supply of brake fluid for the hydraulic brake system.

Hydraulic Brake Master Cylinder: Converts mechanical input force into hydraulic output pressure.

Hydraulic output pressure is distributed from the master cylinder through 2 hydraulic circuits, supplying diagonally opposed wheel apply circuits.

Hydraulic Brake Pressure Balance Control System: Regulates brake fluid pressure delivered to hydraulic brake wheel circuits, in order to control the distribution of braking force.

Pressure balance control is achieved through dynamic rear proportioning (DRP), which is a function of the ABS modulator. Refer to ABS Description and Operation for specific information on the operation of DRP.

Hydraulic Brake Pipes and Flexible Brake Hoses: Carries brake fluid to and from hydraulic brake system components.

Hydraulic Brake Wheel Apply Components: Converts hydraulic input pressure into mechanical output force.

System OperationMechanical force is converted into hydraulic pressure by the master cylinder, regulated to meet braking system demands by the pressure balance control system, and delivered to the hydraulic brake wheel circuits by the pipesand flexible hoses. The wheel apply components then convert the hydraulic pressure back into mechanical force which presses linings against rotating brake system components.


Driver Information and EntertainmentCellular, Entertainment, and NavigationSchematicandRoutingDiagramsRadio/Navigation System Schematics

Radio (U1B-UPF)

RA06D-BU

2

RA07PK

1

RA04D-GN

2

RA05RD

1

RA07GY

RA06GY/D-GN

RA04D-GN/WH

RA05GY

LO

C

DES

C

2 3 11 12

B+

RA01RD

RA01RD

B+

IGN I/II

IGN

19X1 7

RA02D-BU

RA02D-BU

AM/FM

BK

1

1

BK

2

2

X3

ONAM/FM

BK BK

X1

9

9

9

9

F24UB15A

95AX201

F5DA10A

J232

11X601 1211X501 12

1X210 2

P19AGSpeaker -Left FrontDoor

P19AHSpeaker -Right FrontDoor



A11Radio

T4HDigitalRadioAntenna

T25DigitalRadioAntennaAmplifier


Radio (U1B+UPF)

RA06D-BU

2

RA07PK

1

RA04D-GN

2

RA05RD

1

RA07GY

RA06GY/D-GN

RA04D-GN/WH

RA05GY

LO

C

DES

C

2 3 11 12

RAE1BK

8

B+

RA01RD

RA01RD

RA01RD

B+

RA02D-BU

IGN I/II

RA02D-BU

7

IGN

19X1

28X1

RT12RD

RT13BK

RT14WH

RTE1GY

12 14 15 16

RT16TN

RT18YE

6 15

RA12L-BU

RT10L-BU

RA13L-GN

RT11L-GN

6 7 5 13

RA19WH

18

4

RA19WH

RT04WH

X2

Km/hMPH

X1

X1

AM/FM

BK

1

1

BK

2

2

X3

ONAM/FM

BK BK

9

9

9

9

G205

F24UB15A

J231

95AX201

F5DA10A

J232

J235

11X601 1211X501 12

1X210 2



A11Radio



K82MobileTelephoneControlModule


CellularTelephoneSchematics

DataCommunication

Schematics




Power, Ground, Serial Data, Antennas, Auxiliary Outlets, Speed Signal, and Speakers (CWM)

LO

C

DES

C

B+

RA01RD

RA01RD

19

B+

MA02WH

IGN II/III

IGN

RA91D-BU

RA92PK

8 17

GPS

XM

RA06D-BU

2

RA07PK

1

RA04D-GN

2

RA05RD

1

RA07GY

RA06GY/D-GN

RA04D-GN/WH

RA05GY

2 3 11 12

20X2

COAX

COAX

BUX5PKX6

XM GPS

RA19WH

4

19

RAE2BK

20X1

RAE2BK

RI40RD

RI41WH

RI42BK

USB

BKX4 3 1 2

1 4 3

X1

RA60WH

RA40L-BU

5

10X2

X1

RIE1BK

5

46

Km/hMPH

X2

AM/FM

BK

1

1

BK

2

2

X3

ONAM/FM

COAXBK BK

X1

X1

X1 1X2

USR

BUX2 X1

F24UB15A

95AX201

F3DA10A

9

9

9

9

GNX211

G205

J236

JX20111X601 1211X501 12

1X210 2



DataCommunication

Schematics




T4PNavigationAntenna

A11Radio

X83AuxiliaryAudioInput

K9BodyControlModule




Audio Steering Wheel Switch Controls and Cellular Phone Microphone (CWM)

RT05BK

RTE2GY

5V

RT07RD

RT05D-GN

RTE2BK

RT07RD

RTE2BARE

RTE2BARE

4 1 2

15X2 14 16

RT51D-BU

RTE3BN

2 3 5

RT50BN

RT51YE

RTE3GY

4 8 6

RTE3BARE

6X1 16 15

SRCE

RT50WH

LO

C

DES

C

5V

X1

X3

3X203 4 2

X85SteeringWheel Air BagCoil

B24Cellular PhoneMicrophone


A11Radio


Cellular Telephone Schematics

Power, Ground, Serial Data, Antenna, and Vehicle Speed (U1B+UPF)

LO

C

DES

C

B+

RA01RD

RA01RD

RT01RD

1

B+

RA02D-BU

MA02WH

IGN I/II IGN II/III

RT02BU

2 3

COAX

BKX3

Bluetooth

RT10L-BU

RT11L-GN

1 5

RTE4BK

RTE6BK

RTE8BK

RTE9BK

4 21 24 27

IGN IGN

RT03WH

Km/hMPH

RA19WH

4

RT04WH

28

RA19WH

18X1

X1

X1 X2

F24UB15A

95AX201

F5DA10A

F3DA10A

G205

J231

J232 J236

J235



T4SWirelessCommunicationAntenna -Bluetooth

DataCommunication

Schematics



A11Radio


Cellular Steering Wheel Switches, Cellular Phone Microphone, and Radio Communications (U1B+UPF)

RT16TN

RT17YE

RT18BK

17X1 18 19

6X1 16 15

RT12RD

RT13BK

RT14WH

RTE1GY

RTE1BARE

11 9 10 5

32X2 34 35 36

RT05BK

RTE2GY

5V

RT07RD

RT05D-GN

RTE2BK

RT07RD

RTE2BARE

RTE2BARE

4 1 2

29 7 8

SRCE

RT51D-BU

RT50WH

RTE3BN

3 2 5

RT51YE

RT50BN

RTE3GY

8 4 6

RTE3BARE

13X1 12 14

LO

C

DES

C

5V

2 1

X1

X3

3X203 4 2


A11Radio


X85SteeringWheel Air BagCoil



Cellular Phone Microphone (CWM)

RT05BK

RTE2GY

RT07RD

RT05D-GN

RTE2BK

RT07RD

RTE2BARE

RTE2BARE

4 1 2

15X2 14 16

LO

C

DES

C

5V

5V

3X203 4 2

A11Radio


10/15/2015 - VERSION 1.2 2

Documents

BODY BUILDER MANUAL - GM UPFITTER...ZW2 Window Pkg, RR Doors ZW3 WINDOW-PKG, PASSENGER SIDE ONLY ZW6 WINDOW-PKG, RH & LH SIDE DOORS ZW9 Body Equipment - Chassis Body ZY1 Solid Color