1kz-Te Pedal Troubleshoot

8/10/2019 1kz-Te Pedal Troubleshoot

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A19694 A19803

Accelerator Pedal

Position Sensor

ECM

Magnet

Magnet

IC No.2

IC No.1

EPA2

VCP2

VPA2

EPA1

VCP1

VPA1

Ac

celeratorPedalPositionSensorO

utputVoltage(V)

Usable Range

Accelerator Pedal Turning Angle (deg)

*1 *2

Accelerator Pedal Fully Released

Accelerator Pedal Fully Depressed

1.6

0.8

3.7 4.4

2.9 3.6

5

25

0

*1:

*2:

DIAGNOSTICS ECD SYSTEM (1KZTE)

05335

LAND CRUISER PRADO REPAIR MANUAL (RM990E)

DTC 19(1) ACCEL. POSITION SENSOR CIRCUIT(OPEN/SHORT)

CIRCUIT DESCRIPTION

HINT:S This is repair procedure of accelerator pedal position sensor.

S This electrical throttle system is no used throttle cable.

S This accelerator pedal position sensor is noncontact type.

The accelerator pedal position sensor is mounted in the accelerator pedal to detect the opening angle of

the accelerator pedal. Since this sensor is electronically controlled with hall elements, accurate control and

reliability can be obtained. It have the 2 sensors to detect the accelerator position and a malfunction of the

accelerator position sensor.

In the accelerator pedal position sensor, the voltage applied to pedal terminals VPA and VPA2 of the ECM

changes between 0 V and 5 V, in proportion to the opening angle of the accelerator pedal. The VPA is a signal

to indicate the actual accelerator pedal opening angle which is used for the engine control, and the VPA2

is a signal to indicate the information about the opening angle which is used for detecting a malfunction.

The ECM judges the current opening angle of the accelerator pedal from these signals input from terminals

VPA and VPA2 and, the ECM controls the throttle motor based on these signals.

05A6Z01


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A76376

ECMAccelerator PedalPosition Sensor

21

E11

20

28

8

27

19

EPA

VPA

E2

VCPA

VC

VPA23

2

1

6

4

5EPA

VCP2

VCPA

VPA2

VPA

EPA2

E11

E10

E10

E10

E10

BRR

BRY

GRG

LGR

BRW

WL

D2

D6

D4

D5

IC4

BR BR

RW

IL1

12

J10 J/CI3

IL1RW RW

E E

D1

IC4

D3

IC4

IC4

IC4

IC4

GRG

LGR

BRW

WL

05336DIAGNOSTICS ECD SYSTEM (1KZTE)


DTC No. DTC Detecting Condition Trouble Area

19(1)

Condition (a), (b), (c) or (d) continues for 2.0 seconds:

(a) VPA1 0.2 V and VPA2 0.5 V

(b) VPA1 4.8 V

(c) When 3.45 V VPA1 0.2 V, and VPA2 4.8 V

(d) VPA1VPA2 0.02 V

SOpen or short in accelerator pedal position sensor circuit

SAccelerator pedal position sensor

SECM

Condition (a) continues for 0.5 seconds:

(a) VPA1 0.2 V or VPA2 0.5 V

HINT:

After confirming DTC 19 (1), use the handheld tester to confirm the throttle valve opening percentage.

Accelerator pedal position expressed as voltage

Trouble area Accelerator pedal released Accelerator pedal depressed

ACCEL POS #1 ACCEL POS #2 ACCEL POS #1 ACCEL POS #2

VC circuit open 0 0.2 V 0 0.2 V 0 0.2 V 0 0.2 V

VPA circuit open or ground short 0 0.2 V 1.2 2.0 V 0 0.2 V 3.4 5.3 V

VPA2 circuit open or ground short 0.5 1.1 V 0 0.2 V 2.6 4.5 V 0 0.2 V

E2 circuit open 4.5

5.5 V 4.5

5.5 V 4.5

5.5 V 4.5

5.5 V

WIRING DIAGRAM


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FI7052

Depressed Released

A70828

A28

Wire Harness Side

Accelerator Pedal Position

Sensor Connector

VCP2

EPA2 VCPA

EPAVPA

VPA 2

A76387ECM Connector

E10E11

VC

E2 VPA

VCPA

VPA2 EPA


05337


INSPECTION PROCEDUREHINT:

Read freeze frame data using the handheld tester, as freeze frame records the engine conditions when

a malfunction is detected. When troubleshooting it is useful for determining whether the vehicle was running

or stopped, the engine was warmed up or not, etc. at the time of the malfunction.

When using Handheld Tester:

1 READ VALUE OF HANDHELDTESTER(ACCEL POS #1 AND ACCEL POS #2)

(a) Turn the ignition switch ON.

(b) Select the item DIAGNOSIS/ENHANCED OBD II/DATA

LIST/ETCS/ACCEL POS #1 and ACCEL POS #2 and

read its value displayed on the handheld tester.

Standard:

Accelerator pedal ACCEL POS #1 ACCEL POS #2

Released 0.6 1.3 V 1.4 2.1 V

Depressed 2.8 4.5 V 3.6 4.5 V

OK Go to step 5

NG

2 CHECK HARNESS AND CONNECTOR(ECM ACCELERATOR PEDAL POSITIONSENSOR)

(a) Disconnect the accelerator pedal position sensor con-

nector.

(b) Disconnect the ECM E10 and E11 connectors.

(c) Check the continuity between the wire harness side con-

nectors.

Standard (Check for open):

Symbols (Terminal No.) Specified condition

VCP2 (A28 1) VC (E11 21)

EPA2 (A28 2) E2 (E1120)

VPA2 (A28 3) VPA2 (E10 28)

VCPA (A28 4) VCPA (E10 8)Continuity

EPA (A28 5) EPA (E10 27)

VPA (A28

6)

VPA (E10

19)Standard (Check for short):


VCP2 (A28 1) or VC (E11 21)

Body ground

EPA2 (A28 2) or E2 (E1120)

Body ground

VPA2 (A28 3) or VPA2 (E10 28)

Body ground

VCPA (A28 4) or VCPA (E10 8)

Body ground

No continuity

EPA (A28 5) or EPA (E1027)

Body ground

VPA (A28 6) or VPA (E1019)

Body ground


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A19521

AcceleratorPedal

PositionSensor

Connector

A56850

E2()VC(+) VCPA(+)EPA()

E10

ECMConnector

E11

05338DIAGNOSTICS ECDSYSTEM(1KZTE)

LANDCRUISERPRADOREPAIRMANUAL (RM990E)

NG REPAIR OR REPLACE HARNESS ORCONNECTOR

OK

3 INSPECTECM(VCANDVCPAVOLTAGE)

(a) Disconnecttheacceleratorpedalpositionsensorcon-

nector.

(b) TurntheignitionswitchON.

(c) MeasurethevoltagebetweentheterminalsoftheECM

E10andE11connector.

Standard:

Symbols(TerminalNo.) Specifiedcondition

VC(E1121)E2(E11 20)

VCPA(E108)EPA(E1027)4.55.5V

NG CHECKANDREPLACEECM

OK

4 REPLACEACCELERATORPEDALRODASSY(Seepage 1033)

GO

5 READOUTPUTDTC(ACCELERATORPEDALPOSITIONSENSORDTCISOUTPUTAGAIN)

(a) CleartheDTC(Seepage05

303).(b) Start the engine.

(c) Drive the engine at idle for 15 sec. or more.

(d) ReadtheDTC(Seepage05303).

Result:

Display (DTC output) Proceed to

DTC 19(1) is output again A

No DTC output B
http://m_10_0033.pdf/http://m_10_0033.pdf/http://m_10_0033.pdf/http://m_10_0033.pdf/http://m_10_0033.pdf/http://m_05_0303.pdf/http://m_05_0303.pdf/http://m_05_0303.pdf/http://m_05_0303.pdf/http://m_05_0303.pdf/http://m_05_0303.pdf/http://m_10_0033.pdf/http://m_05_0303.pdf/http://m_05_0303.pdf/


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A70828

A28

Wire Harness Side

Accelerator Pedal Position

Sensor Connector

VCP2

EPA2 VCPAEPA

VPA

VPA 2

A76387ECM ConnectorE2

VC

VCPA

EPA

E10E11

VPA

VPA2


05339


B SYSTEM OK

A

CHECK AND REPLACE ECM

When not using handheld tester:

1 CHECK HARNESS AND CONNECTOR(ECM ACCELERATOR PEDAL POSITIONSENSOR)

(a) Disconnect the accelerator pedal position sensor con-

nector.

(b) Disconnect the ECM E10 and E11 connectors.

(c) Check the continuity between the wire harness side con-

nectors.

Standard (Check for open):Symbols (Terminal No.) Specified condition

VCP2 (A28 1) VC (E11 21)

EPA2 (A28 2) E2 (E1120)

VPA2 (A28 3) VPA2 (E10 28)

VCPA (A28 4) VCPA (E10 8)Continuity

EPA (A28 5) EPA (E10 27)

VPA (A28 6) VPA (E10 19)

Standard (Check for short):


VCP2 (A28 1) or VC (E11 21)

Body ground

EPA2 (A28 2) or E2 (E1120)

Body ground

VPA2 (A28 3) or VPA2 (E10 28)

Body ground

VCPA (A28 4) or VCPA (E10 8)

Body ground

No continuity

EPA (A28 5) or EPA (E1027)

Body ground

VPA (A28 6) or VPA (E1019)

Body ground

NG REPAIR OR REPLACE HARNESS ORCONNECTOR

OK


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A19521

AcceleratorPedal

PositionSensor

Connector

A56850

E2()VC(+) VCPA(+)EPA()

E10

ECMConnector

E11

05340DIAGNOSTICS ECDSYSTEM(1KZTE)

LANDCRUISERPRADOREPAIRMANUAL (RM990E)

2 INSPECTECM(VCANDVCPAVOLTAGE)

(a) Disconnecttheacceleratorpedalpositionsensorcon-

nector.

(b) TurntheignitionswitchON.

(c) MeasurethevoltagebetweentheterminalsoftheECM

E10andE11connector.

Standard:

Symbols(TerminalNo.) Specifiedcondition

VC(E1121)E2(E11 20)

VCPA(E108)EPA(E1027)4.55.5V

NG CHECKANDREPLACEECM

OK

3 REPLACEACCELERATORPEDALRODASSY(Seepage 1033)

GO

4 READOUTPUTDTC(ACCELERATORPEDALPOSITIONSENSORDTCISOUTPUTAGAIN)

(a) CleartheDTC(Seepage05303).

(b) Start the engine.

(c) Drive the engine at idle for 15 sec. or more.

(d) ReadtheDTC(Seepage05303).

Result:

Display (DTC output) Proceed to

DTC 19(1) is output again A

No DTC output B

B SYSTEM OK

A

CHECK AND REPLACE ECM
http://m_10_0033.pdf/http://m_10_0033.pdf/http://m_10_0033.pdf/http://m_10_0033.pdf/http://m_10_0033.pdf/http://m_05_0303.pdf/http://m_05_0303.pdf/http://m_05_0303.pdf/http://m_05_0303.pdf/http://m_05_0303.pdf/http://m_05_0303.pdf/http://m_05_0303.pdf/http://m_05_0303.pdf/http://m_10_0033.pdf/http://m_05_0303.pdf/http://m_05_0303.pdf/

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1kz-Te Pedal Troubleshoot