All Mégane Vehicles Except Scénic

8/14/2019 All Mégane Vehicles Except Scénic

http://slidepdf.com/reader/full/all-megane-vehicles-except-scenic 1/50

77 11 200 486 JUNE 1998 Edition Anglaise

New air conditioning

N.T. 3026A

For the sections not described in this note, refer to M.R. 312.

"The repair methods given by the manufacturer in this document are based on thetechnical specifications current when it was prepared.

The methods may be mod ified as a result of changes introduced by themanufacturer in the p roduction of the various component units and accessoriesfrom which his vehicles are constructed."

All copyrights reserved by Renault.

Copying or translating, in part or in full, of this document or use of the service partreference numbering system is forbidden w ithout the pr ior written authority of Renault.

C Renault 1998

All Mégane vehicles except Scénic

Basic manual : M.R. 312



Contents

Page

62-1

62-2

62-3

62-4

62-8

62-9

62-1162-12

62-15

62-16

62-17

62-18

62-25

62-26

AIR CONDITIONING

General

Control panel

Particle filter

Fan assembly

Evaporator

Distributor u nit

ComputerOperational wiring d iagram

Fault finding

Introduction

XR25 fiche

Representation of bargraphs

Interpretation of XR25 bargrap hs

Customer comp laints

Fault charts

62



AIR CONDITIONING

General

CONSUMABLES

Oil for DELPHI HARRISON V5 comp ressor:

PLANETELF Sanden 488 : 220 cm3 ± 15

(to be ord ered from ELF).

Refrigerant fluid :

R134a : 750 g ± 30

Compressor:

DELPHI HARRISON V5

62

62-1



AIR CONDITIONING

Control panel 62

98114-3S

DEVELOPMENT OF THE AIR RECYCLING CONTROL

The air recycling control button is no longer fitted. This function is now car-

ried out by th e air flow control knob.

The four p ositions to the right ad just the fan speed in norm al operating mod e

(outside air).

The four positions to the left ad just the fan speed in r ecycling m ode (air taken

from inside the passenger compartment).

62-2



AIR CONDITIONING

Particle filter 62

98478R

REFITTING

Refitting is the reverse of remova l.

REPLACEMENT

See the warr anty an d servicing booklet.

REMOVAL

Open the bonnet.

Remove:

- the air inlet grille by releasing the two clips

(G),

- the cover by removing the two bolts (H).

15048R

Remove the p article filter by p ulling the special

tab.

15053R

62-3



AIR CONDITIONING

Fan assembly 62

15047-1R

Fit plugs to the tubes and the expansion valve.

Unclip the p ressure sensor and detach it from th e

engine, then remove the scuttle pan el partition,

five bolts (C).

REMOVAL

Remove:

- the w indscr een w iper ar ms,

- the upper scut tle panel sea l,- the air in let gr ille,

- the battery,

- the coolant deflector located on the fan as-

sembly, two bolts (F).

Drain the R134a refrigerant circuit usin g the fil-

ling station.

Remove the acoustic tie rod betw een the shock

absorber turrets.

Disconnect the tubes taking th e R134a to th e ex-pan sion valve (bolt E: 0.8 daN.m).

99062R

15046R

62-4



AIR CONDITIONING

Fan assembly 62

15052R

Disconnect th e 15 track resistance unit connector

on the air conditioning u nit.

Remove the air cond itioning unit mou ntings, two

bolts (A) and one nut (B).

Remove the air conditioning u nit via the scuttlepanel partition opening.

SPECIAL NOTES

Remove the four heat shield m oun ting bolts on

the bulkhead.

• E7J engine

Remove the air filter.

Protect the inlet apertu re.

Release the air filter from the top of the engine.

• K7M engine

Remove:

- the air filter hose after disconnecting the airtemperature sensor,

- the throttle body (four bolts + connections)

and detach it from the top of the engine.

• F3R engine

Remove the accelerator cable mounting, tw o

bolts + switches.

• F8Q engine

Remove:

- the breather hose mounting bracket ,

- the pre-heating unit mounting pla te .

Unclip the solenoid valve connectors.

Remove the solenoid valve hose.

• All types

Remove the mou nting bolt (D) from th e connec-

ting hose.

Raise the end of the connecting h ose to detach

the pan el seal and m ove it slightly to the right

hand side.

15046-1R

62-5



AIR CONDITIONING

Fan assembly 62

98818R

Drain the circuit using a vacuum pu mp , then refill

the circuit with R134a refrigerant using the filling

station.

IMPORTANT: ensur e that the seals are in goodcondition. Lubricate the seals with PLANETELF

Sanden 488.

REFITTING

Position the air conditioning u nit on the centring

device (H). Refitting is the reverse of removal.

AIR CONDITIONING FAN

REMOVAL

The fan is removed after removal of the air condi-tioning un it.

Remove the three fan mounting bolts on the air

conditioning u nit then release the fan.

Disconnect the feed connector (I).

15051R

REFITTING


62-6



AIR CONDITIONING

Fan assembly 62

15049R

Disconnect:

- the 15 track connector and the micromotor

connector (J),

- the fan connector then remove the resistance

un it, one bolt.

AIR RECYCLING MICROMOTOR

REMOVAL

The micromotor can be removed after the aircond itioning u nit is removed.

Disconnect the connector (J) then un clip th e

micromotor (see arrows).

REFITTING

Place the flap and the micromotor in the outside

air intake position.

Engage the motor sp rocket on the flap spr ocket

and clip the micromotor into place holding theflap in the ou tside air intake position. Once the

micromotor is refitted, the flap seal shou ld cor-

rectly ensu re the seal with the air cond itioning

unit.

Check the cond ition of the seal.

REFITTING


NOTE: if the resistance unit has to be rem oved,

you MUST check that the fan rotates freely. If it

does not, replace it.

15047S

RESISTANCE UNIT

REMOVAL

Disconnect the battery.

Remove the w indscreen w iper arms, the upp er

scuttle panel seal, the air inlet grille, the coolant

deflector on the fan assembly.15050S

62-7



AIR CONDITIONING

Evaporator 62

PRJ6205

- the par ticle filt er ,

- the expansion valve, two bolts (0.6 daN.m).

REFITTING

Refitting is th e reverse of remov al.

REPLACEMENT

The evaporator can only be replaced after remova l of the fan assembly (see

method).

Remove:

- the a ir condit ioning fan,

- the a ir recycling micromotor,

- the resistance unit , one bolt ,

62-8



AIR CONDITIONING

Distribution unit 62

15046R

REMOVAL

It is no longer necessary to open the refrigerant

circuit to remove the air d istribution unit. There is

therefore no need to fill or d rain for this opera-tion. How ever, to access the d istribution un it

mou nting bolt located in the scuttle panel, follow

the method described below.

Remove:

- the w indscr een w iper ar ms,

- the upper scut tle panel sea l,

- the air in let gr ille,

- the battery,

- the acoustic tie rod between the shock absor-

ber turrets.

Unclip the pressure sensor and detach it from the

engine, then remove the scuttle pan el partition,

five bolts (C).

(see the sp ecial notes for particular engines in th e

"fan assem bly" section).

Remove the connecting h ose mou nting bolt (D).

Raise the end of the connecting hose to release

the p anel seal.

15052R

62-9



AIR CONDITIONING

Distribution unit 62

15054R

Move the connecting hose to the right hand side

to gain access to the distribution un it moun ting

bolt (K) located in th e scuttle pan el.

For operations following rem oval of the distribu-

tion un it, the meth od is the same as that d escri-bed in the first repair method.

REFITTING

Refitting is th e reverse of rem oval.

62-10



AIR CONDITIONING

Computer 62

15055R

NOTE: tracks 12 and 29 are not u sed. How ever the

connections are present for an evaporator temp e-

rature sensor to be fitted wh en an evaporator

temperature w hich is too low is noted d uring ope-

ration of the air cond itioning.

The air conditioning comp uter is located on the

passenger side, und er the dashboard, behind the

glove compartm ent.

Removal presents no particular d ifficulty.

15 track connector (A)

Track Allocation

1 Not used

2 AC op eratin g in form ation

3 Recycling on/ off

4 AC computer earth

5 +12 V accessories feed (hea ting fuse)

6 +12 V a fter ignit ion feed (COA fuse)

7 AC op eration tell-tale ligh t

8 Not used

9 + side lights

10 Not used

11 Not used

12 Not used

13 Not used

14 Not used15 Not used

30 track connector (B)

Track Allocation

1 + 12 V a fter ignit ion feed (COA fuse)2 Com pressor clu tch con trol

3 L d iagn ostic inform ation

4 Fan assem bly sp eed in form ation

5 Not used

6 K d iagn ostic in form ation

7 Not used

8 Not used

9 Not used

10 Not used

11 Not used

12 Not used

13 Not used

14 Not used

15 Not used

16 + 12 V after ignit ion feed (COA fuse)

17 Com pressor clu tch con trol

18 AC/ in ject ion cu t-ou t in form ation

19 AC/ AT cu t-ou t in form ation

20 AC-CYCLE in form ation

21 Not used

22 Not used

23 Not used

24 Not used

25 Not used

26 + Recyclin g con trol

27 - Recyclin g con trol

28 Not used

29 Not used

30 Not used

62-11



AIR CONDITIONING

Operating wiring diagram 62

PRJ15146

CABRIOLET - EURO 96

62-12



AIR CONDITIONING


PRJ15147

ALL TYPES EXCEPT CABRIOLET AND SCENIC - EURO 96

62-13



AIR CONDITIONING


COMPONENTS KEY

119 Automatic transmission computer

120 Inject ion computer

171 Air condit ioning clu tch206 Air conditioning trifunction pressure switch

319 Air condit ioning control panel

320 Basic fan/ air conditioning assembly

419 Air condit ioning control unit

A 0 Volt Rheostated

B + 12 Volts accessor ies feed

C 0 Volt electron ic earth

D + 12 Volts sid e lights

E + 12 Volts after ignit ion feed

F + 12 Volts after ignition feed (compressor clutch (+))K Diagnostic line K in for mation

L Diagn ostic lin e L in form ation .

62-14



cleco6404.0

AIR CONDITIONING

Fault finding - Introduction 62

- Connect the XR25 to the diagnostic socket.

- ISO selector se t to S8

- Use fich e n° 61 and enter code D17 n.61

There are certain cond itions regard ing illumination of the control pa nel tell-tale lights:

- The A.C. tell-tale light illum inates when air conditioning is requested an d wh en the first fan speed is set. It

is memorised w hen the ignition is switched off.

IMPORTANT:

Whenever the air conditioning computer is replaced, enter G49*25 on the XR25 to confi-

gure it with auto-setting and enter G49*6 to configure with trifunction pressostat or enter

G49*5 to configure with pressure sensor.

62-15



cleco6404.0

AIR CONDITIONING

Fault finding - XR25 fiche 62PRESENTATION OF XR25 FICHE N° 61

FI21861

62-16



cleco6404.0

AIR CONDITIONING

Fault finding - Representation of bargraphs 62BARGRAPH SYMBOLS

FAULTS (always on coloured background )

If illum inated, ind icates a fault on th e prod uct tested. The associated text definesthe fault.

This bargraph m ay be:

- Illuminated : fault present.

- Flashing : fault memorised .

- Extinguished : fault absent or not detected .

STATUS (always on wh ite background )

Bargraph always located on top right h and side.

If illum inated, indicates that d ialogue is established w ith the prod uct compu ter.

If it remains extinguished :

- The code d oes not exist.

- There is an XR25, comp uter or XR25 / compu ter connection fault.

The representation of the following barg raph s indicates their initial status:

Initial status: (ignition on, engine stopped , no operator action)

Undefined

illum inated w hen the function or cond ition

specified on the fiche is being m et.

Extinguished

Illuminated extinguished when the function or condition

specified on the fiche is no longer being m et.

ADDITIONAL DETAINS

Certain bargrap hs have a *. The comm and *.., when the bargrap h is illum inated,

allowing add itional information on the type of fault or status to be disp layed.

or

62-17



cleco6404.0

AIR CONDITIONING

Fault finding - Interpretation of XR25 bargraphs 62

AFTER REPAIR Enter G0** on the XR25.

Check that the system is operating correctly.

Bargraph 1 LH side illuminated

COMPUTER FAULT

1

NoneNOTES

Fiche n° 61

Replace the air cond itioning control un it.

62-18



cleco6404.0

AIR CONDITIONING


AFTER REPAIR

Bargraph 1 RH side extinguished

XR25 / CONTROL UNIT COMMUN ICATION1

NoneNOTES

Fiche n° 61

Before establishing comm un ication between the XR25 and the control unit, check that you have sw itched

the ignition on.

Ensure that the XR25 is not the cause of the fault by trying to comm un icate with a compu ter on another

vehicle.

Check that the ISO selector is in position S8 , that you are u sing XR25 cassette 18 and the correct access

code (D 17).

Check battery voltage (U > 10.5 vol ts). Rechar ge the battery if necessary.

Check that the control un it connectors are plugged in prop erly.

Check that the air conditioning control u nit is correctly fed:

- earth on track 4 of the 15 track red connector

- + after igni tion feed on track 6 of the 15 track red connector

Check that the d iagnostic socket is correctly fed:

track K track 6 of the 30 track grey air conditioning

track L track 3 control unit connector

If d ialogue is still not established between the XR25 and the control u nit, replace the air conditioning

control unit.

You can begin fault find ing.

62-19



cleco6404.0

AIR CONDITIONING


AFTER REPAIR Check that the system is operating correctly by entering G21* on th e XR25

(comm and direct from the comp ressor).

Enter G0** on the XR25.


COMPRESSOR CONTROL

XR25 aid: C.O. open circuit

C.C.1 short circuit to 12 volts

4

Before any rem oval operation, enter G0** on the XR25 and start u p the system.

A refrigerant leak is detected w hen this bargrap h is illuminated and outside

temperature > 5°C if CO is displayed wh en entering *04.NOTES

Fiche n° 61

Check continu ity and that there is no short circuit of the wiring between track 1 of the clutch an d tracks 2

and 17 of the 30 track grey connector for the air cond itioning control unit.

Repair the w iring if necessary.

Directly feed th e compressor w ith 12 Volts and check w hether it is operating.

Replace the compressor if necessary.

If the fault p ersists, replace the air cond itioning control un it.

62-20



cleco6404.0

AIR CONDITIONING


AFTER REPAIR Enter G0** on the XR25.


Bargraph 4 RH side illuminated

AIR RECYCLING MOTOR4

NoneNOTES

Fiche n° 61

Check that the connector is correctly clipp ed onto the pow er mod ule.

Check the continu ity and insu lation from earth and 12 volts of the w iring between tracks:

passenger compartment fan 2 27 30 track grey connector for the AC control unit

assembly power module 1 26

connector

Repair the faulty w iring.

If the fault p ersists, replace the air cond itioning control un it.

Check the cond ition of the air recycling flap control motor.

On th e motor connector, measu re the resistance between the tw o tracks.

Replace the recycling motor if necessary.

62-21



cleco6404.0

AIR CONDITIONING


Check that the system is operating correctly.AFTER REPAIR


INJECTION PREVENTS OPERATION OF THE AIR CONDITIONING13

This bargraph shou ld be extingu ished wh en the engine is running.

If it is illuminated , you m ay carry out fau lt find ing.

BG 14 LH side and 14 RH side shou ld be extinguished .NOTES

Fiche n° 61

Check the continu ity of the w iring between the injection computer cut-out information track an d track

18 of the 30 track AC computer connector.

Repair it if necessary.

First check that th e air cond itioning has actually been requested (requested on the control panel).

If the fault persists, see the conditions to be observed w hen carrying ou t operations to th e injection in the

injection fault finding section.

62-22



cleco6404.0

AIR CONDITIONING



Bargraph 13 RH side illuminated

AUTOMATIC TRANSMISSION PREVENTS OPERATION OF THE AIRCONDITIONING

XR25 aid: CC.0 (short circuit to earth)

13

This bargraph shou ld be extingu ished wh en the engine is running.

If it is illuminated , you m ay carry out fau lt find ing.NOTES

Fiche n° 61

Check the insulation from earth of the wiring between the AT computer cut-out information track and

track 19 of the 30 track AC computer connector.

Repair it if necessary.

If the fault p ersists, check the AT fault finding, as the fault is connected to the au tomatic transm ission.

62-23



cleco6404.0

AIR CONDITIONING

Fault finding - Customer complaints 62

Air distribution fault

Air flow fault

Lack of heat ing efficiency

No h eating

Too mu ch heating

Insufficient heating to the rear seats

Lack of de-icing/ de-misting efficiency

Lack of ven tilation efficiency

Chart 1

Chart 2

Chart 3

Chart 4

Chart 5

Chart 6

Chart 7

Chart 8

THE PASSENGER COMPARTMENT FAN DOES NOT WORK Chart 9

Stiff controls (passenger comp artmen t p roblems) Chart 10

THE RECYCLING FLAP DOES NOT WORK Chart 11

No cold air

Too much cold air

Lack of efficiency

Chart 12

Chart 13

Chart 14

AIR CONDITIONING FAULTS

Chart 15THE COOLING FAN ASSEMBLY DOES NOT WORK

PASSENGER COMPARTMENT PROBLEMS

Chart 16THE AIR CONDITIONING TELL-TALE LIGHT DOES NOT ILLUMINATE

BUT THE AIR CONDITIONING IS OPERATING

62-25



cleco6404.0

AIR CONDITIONING

Fault finding - Fault charts 62


no

no

Chart 1 AIR DISTRIBUTION FAULT

Before carrying ou t any operation, check that the custom er is using th e air

conditioning correctly.

Air conditioning not regulated.NOTES

Set the passenger compartment fan to fully

on position, temperatu re control on

maximum h ot or maximum cold and move

the air d istribution control. Check that the air

output corresponds to the selection.

Is it correct?

yes

Air d istribution is correct.

If necessary, explain the op eration of the

system to the custom er again.

Check, by sight or tou ch, on the RH side of the

air distribution u nit that

mov ing the control moves the spr ockets and

the lever.

Do they move?

yes

A

yes

If the fault persists,

remove the air d istribution u nit and check the

distribution flaps.

Repair or replace the assembly.

Check the connection of the cable on the air

distribution u nit and the control panel and

the cond ition of the cable and

its moun ting. Is it good?

no

Replace the control cable or repair th e cable

connector (clip) or replace the faulty

component (panel or distribution unit).

If there is a fan fau lt, check the vent ilation

du cts and the vents.Repair if necessary.

Check the ad justm ent of the control cable for

the air distribution flap.

62-26



cleco6404.0

AIR CONDITIONING



yes

Chart 1CONT

A

Check the cond ition of the mov ing

compon ents (sprockets, levers etc.) on th e air

distribution u nit

and the control panel.

Are they OK?

no

Repair if possible,

otherw ise, replace the distribut ion un it

or the control panel.

Remove the air d istribution un it and check

the distribution flaps.

Repair or replace the assembly.

62-27



cleco6404.0

AIR CONDITIONING



yes

Chart 2 AIR FLOW FAULT



Air conditioning not regulated.

NOTES

Does the passenger compartment fan

operate?no See Chart 11

Check the air inlet circuit, scuttle panel,par ticle filter, rain gu ard .

Are th ey correct?

Repair or clean

or replace the particle filter.no

yes

yes

Check that t he air extraction circuit is not

blocked.

Repair if necessary.

Does the fault persist?

yes See Chart 1

no

Remove the heating rad iator.It is pr obably blocked . Clean or rep lace it

(only app lies to vehicles wh ich have d riven

without the p article filter).

Is there an air d istribution fault in the

passenger compartm ent?

no End of fault find ing.

62-28



cleco6404.0

AIR CONDITIONING



no

Chart 3 HEATING EFFICIENCY FAULT

NOTES

yes

Advise the customer how to make optimum

use of the heating

(example: do n ot set the passenger

comp artment fan to maximum wh en starting

from cold. Ad just it pr ogressively).

Carry ou t a road test to confirm th e

customer’s comp laints.

Is the road test satisfactory?

yes

A

yes

Visually check whether the flap moves as far as it shou ld.

Does it move as far as it shou ld?

Visually check that m oving the control m oves

the m ixing flap.

Does the flap m ove?

yes

Check the cooling circuit (tha t it is correctly

filled and b led), the cleanliness of the circuit

(pipes, connections, the conformity of the

circuit...).

Repair if necessary.Does the fault persist?

no See Chart 1.

noRe-ad just the control cable (cable contro lling

the sp rockets on the RH side of the air

distribution unit).





62-29



cleco6404.0

AIR CONDITIONING


AFTER REPAIR Check that the d isconnected comp onents are reconnected correctly.


Chart 3CONT

A

Check whether the hose is stiff. no Replace the thermostat.

Check that no cold air is leaking into the

passenger comp artment

(seals, wire guid es, cables ...).



yes

yes

The heating rad iator is probab ly blocked.Remove the rad iator and clean or rep lace it.

(only app lies to vehicles wh ich h ave been

driven w ithout the particle filter).

Check the air inlets (par ticle filter) and

outlets.Partially blocked air inlets and outlets redu ce

the heating air flow into th e passenger

compartment.





yes

62-30



cleco6404.0

AIR CONDITIONING


AFTER REPAIR Check that the d isconnected comp onents are reconnected correctly.


no

Chart 4 NO HEATING

NOTES

Is there an air flow fault ? yes See Chart 2

yes

Check the level of coolant in the cooling

circuit.NOTE: if the coolant level is too low, this may

lead to the circuit needing to be re-primed

wh en driving with low load and at idle speed.



yes

yes

Remove the heating rad iator.

Clean or replace it if necessary.


the m ixing flap.Does it move?

Check the cooling circuit.

NOTE: fitting an oil, water or air ra diator

wh ich is not app roved by th e Techn ical

Departm ent and is incorrectly connected m ay

redu ce or even cancel out th e flow of coolantin the h eating rad iator.

Repair the coolant circuit if necessary.


no See Chart 1






62-31



cleco6404.0

AIR CONDITIONING



yes

Chart 5 TOO MUCH HEATING

NOTES


the m ixing flap.

Does it move? no See Chart 1.

Check that the flap mov es as far as it should .

Does it move as far as it should? noRe-adjust the cable

(on the right hand side of the air distribution

unit).

yes

Check the op eration of the recycling flap.

Is it blocked in the recycling position? yes See Chart 11.

no

Check the operation of the engine coolant

thermostat.

Replace the th ermostat if necessary.




62-32



cleco6404.0

AIR CONDITIONING


AFTER REPAIR Check that any d isconnected comp onents are reconnected correctly.


yes

Chart 6 INSUFFICIENT HEATING TO THE REAR SEATS

NOTES

Check that the air ou tlets to the rear of the

centre console are not blocked

(by carp et etc ...).

Are they OK?

no Detach the air outlets.

Remove the centre console and check

wh ether the connector and the seal between

the air distribution unit and the heating duct

to the rear seats are correct.


None

62-33



cleco6404.0

AIR CONDITIONING




Chart 7 LACK OF DE-ICING/DE-MISTING EFFICIENCY

NOTES

See Chart 1

yes

Check that the air extraction d ucts are not

blocked. Repair if necessary.


yes

yes

See Chart 2

no

yes

See Chart 3

no

yes

no

Check that th e recycling flap is not blocked in

the recycling position (see Chart 11).


Is there a heating efficiency fault?

Is there an air flow fault?

Is there an air distribution fault?

Ensure that n o water is leaking into thepassenger comp artment wh ich w ould

considerably increase the hu mid ity and

red uce the efficiency of de-icing. Look for the

source of the leak and rep air.


Check that the insides of the w indow s are clean.

End of fault find ingno

End of fault find ingno

62-34



cleco6404.0

AIR CONDITIONING




Chart 8 LACK OF VENTILATION EFFICIENCY

NOTES None.

no

Is there an air flow fault? yes See Chart 2.

yes See Char t 1.

no

yes End of fault find ing.

Is there an air distribution fault?

Check that the mixing flap moves as far as it

should.

Does it?

no

Re-ad just the cable.

62-35



no

cleco6404.0

AIR CONDITIONING




Chart 9 THE PASSENGER COMPARTMENT FAN DOES NOT WORK

NOTES


conditioning system correctly.


yes

Check for the presence of 12 V on th e cont rol

pan el connector tracks:

B9 speed 4

B8 speed 4

A8 speed 3

A7 speed 2A5 Speed 1

Is there 12 Volts?

yes

Check the +Battery, +side lights fuses.

Are the fuses in good condition?no Replace the faulty fuse(s).

yes End of fault find ing.Ignition on, set the fan to d ifferent sp eeds

and check that th e fan is operating correctly.

Is it operating norm ally?

no

yes

no

A

Check the connections between + accessories

feed

and the control panel tracks A3 and A4.



Replace the control p anel.

End of fault find ing.

62-36



no

yes

yes

cleco6404.0

AIR CONDITIONING




Check on the passenger comp artm ent fan

assembly pow er mod ule for 12 Volts on tracks

4 speed 1

5 speed 2

6 speed 3

12 speed 4

14 speed 4

Is there 12 Volts?

Chart 9CONT

A

noRepair the wiring between the control panel

and the passenger comp artment fan

assembly.

Check on the passenger comp artm ent fan

assembly power motor for the presence of 0

Volt

on tracks 14 and 15.

Is there 0 Volt?

no Repair the wiring.

yes Replace the power module.Does the passenger compartment fan

assembly work on speed 4 and n ot on speeds

1, 2, 3?

Replace the fan assembly.

62-37



cleco6404.0

AIR CONDITIONING




yes

Chart 10CONTROLS STIFF

(passenger compartment problems)

NOTES

Check the rou ting of the control cable.

Remove anything w hich m ay prevent the

cable moving freely:

- kinks,

- cable restricted by p lastic clips.

Replace it if necessary.


no

Replace the control panel or repair the

mov ing compon ents of the flap or replace the

air distribution unit.

yes

Replace the flap control cable.

Unclip the cable on the assembly side and

check how hard it is to move each

compon ent, control knob an d control flap on

the air d istribution un it.

Is it OK?

None.


62-38



cleco6404.0

AIR CONDITIONING




Chart 11 AIR RECYCLING DOES NOT WORK

NOTES Check that bargrap h 4 RH side is extingu ished. If it is not, deal w ith the bargr aph

first.


Check the condition of the +Accessories,

+after ignition feed fuses. Replace them if

necessary.

yes

Check the insu lation and continu ity of the

wiring between:

30 track 26 1 motor

connector 27 2 connector

Is the wiring in good cond ition?

noRepair the faulty w iring.


62-39



cleco6404.0

AIR CONDITIONING




yes

yes

Chart 12 AIR CONDITIONING FAULTSNo cold air

NOTES

Check the cond ition of the + accessories , +

after ignition feed fuses. Replace them if

necessary.


The passenger compartment fan operates.

Check that bargrap hs 2 RH side, 2 LH side and 4 LH side are extingu ished.

noRepair the wiring between the fuse and track

5 of the connector.

yes

noRepair the wiring between the fuse and track

1 of the connector.

Check for the pr esence of + 12 Volts

accessories feed on track 5 of the 15 track red

air conditioning computer connector (BG 7LH

side).

Is there 12 Volts?

yes

Conn ect the XR25, set fan to sp eed 2 and

check #08.

Is the value read greater than 7?

no

Repair the wiring between track 4 of the grey

connector and track 9 of the passenger

compartment fan assembly power module

connector.

Check for the pr esence of + 12 Volts after

ignition feed on track 1 of the 30 track greyair conditioning computer connector.

Is there 12 Volts?

A

62-40



cleco6404.0

AIR CONDITIONING




yes

AIR CONDITIONING FAULTSNo cold air

NOTES

Check that th e air conditioning tell-tale light

illuminates on the control panel wh en the

button is pressed.

Does the tell-tale light illuminate?

no See Chart 17.

yesSee the section on d ealing w ith bargrap h 13

LH side or 13 RH side.

no

Check that bargrap hs 13 LH side an d 13 RH

side are extinguished . The air cond itioning is

preven ted from op erating by the injection or

the automatic transmission.

Are these bargraphs extinguished?

Chart 12CONT

A

no

Connect the XR25 and check that bargrap hs

14 LH side an d 14 RH side are extinguished.

Are they?

yes See Chart 13A.


The passenger compartment fan is operating.


Fill the refrigeran t circu it.

62-41



cleco6404.0

AIR CONDITIONING




Chart 12 A AIR CONDITIONING FAULTSNo cold air

NOTES


The passenger compartment fan operates.


yes

Check the wiring between:

air 2 1

conditioning compressor

computer 17 1



no


Conn ect the XR25 and en ter G21* (direct

comman d from the compressor clutch).

Does the comp ressor engage?

Directly sup ply the comp ressor with 12 Volts

on track 1.

Does the comp ressor engage?

no Replace the compressor.

yes

Replace the air cond itioning compu ter.

62-42



cleco6404.0

AIR CONDITIONING




Chart 13 AIR CONDITIONING FAULTSToo much cold air

NOTES




yes

Use the XR25 or pressure gauges to check the

pressu res in the refrigerant circuit.

The fan assembly is engaged if high p ressure

is ≥ 19 bars and stopped if pressure is ≤ 14

bars.

If the pressu res are correct, replace the

pressu re sensor. Otherw ise, refill the

refrigerant circuit.no

Check that the recycling flap d oes not rem ain

in the recycled air p osition.

Press the control button and check that the

flap m oves.

Does it move?

no See Chart 11.

yes

no See Chart 1.

yes

Visually check that the flap moves as far as it

should.

Does it?

no Re-adjust the cable.

Check that moving the heating control moves

the flap.

Does it move?

yes

Replace the fan assembly.

Is the fan assembly still engaged?

(normal if high p ressure ≥ 19 bars)

62-43



cleco6404.0

AIR CONDITIONING




Chart 14 AIR CONDITIONING FAULTSLack of efficiency

NOTES





Ensure that the r ecycling flap is in the

recycled air cond itioning position.

Is this correct?

no See Chart 11.

Check that the flap mov es as far as it should ,

re-adjust the cable if necessary. Does the

fault persist?


Is there an air flow fault? yes See Chart 2 or Chart 9.

no

A

yes

yes

yes

Check the tension of the comp ressor belt, the

clutch air gap an d its condition.

Re-tension the belt or r eplace the compr essor

clutch if necessary.


62-44



cleco6404.0

AIR CONDITIONING




yes

Chart 14CONT

A

no

Check the setting of the trifunction pr essostat

pressures:

Pressure = 14/ 19 bars ± 1.5.

If the sett ing is incorrect,

replace the p ressostat if necessary.

yes

Check the cleanliness of the cond enser w iring

loom.

Clean or replace the cond enser.

Vehicle stationary, engine ru nn ing at idle

speed, air cond itioning set to maximum,

measu re the refrigerant circuit pressure.

If the p ressure is > 26 bars, there are a variety

of possible causes:

- not enough flu id ,

- the fan assembly is operating abnormally,

- the condenser is contaminated,

- the engine is over-heating.Is the pressu re < 26 bars?

Check the op eration of the cooling fan

assembly at high speed (fan set to maximum

and air cond itioning on).

It shou ld be:

- engaged if high pressure

≥ 19 bars ± 1.5

- stopped if high pressure

≤ 14 bars ± 1.5

Is the fan assembly op erating correctly?

no See Chart 15.

Clean the circuit an d refill the circuit w ith

refrigerant.

62-45



yes

yes

yes

cleco6404.0

AIR CONDITIONING




Chart 15 THE COOLING FAN DOES NOT WORK

NOTES Air conditioning not regulated.

The comp ressor operates.

Check the fuses in the passenger

comp artment connection un it and

in the engine connection unit.

Are they in good cond ition?

no Replace the fuses.

no Replace the fan assembly.Sup ply the fan assembly d irectly.

Does it operate?

no

Shu nt tracks A an d B of the trifun ction

pressostat. Does the fan op erate at high

speed?A

yes

Correctly reconnect the p ressostat, then

connect the pressure gau ges to the air

conditioning circuit. Air conditioning and fan

set to maximum, check the setting of the

cooling fan control pr essostat:

- p ressu re ≤ 14 bars, fan operating at low

speed,

- p ressu re ≥ 19 bars, fan op erating at h igh

speed.NOTE: For an engine coolant tem peratu re of

92°C, the fans also operate.

Is the pressu re > 19 bars or ± 1.5?

no Refill the circuit with refrigerant.

Replace the trifun ction pr essostat.

62-46



cleco6404.0

AIR CONDITIONING


AFTER REPAIR

Repair the wiring to th e fan assembly.


yes

Is there 12 Volts on tr ack A of the trifun ction

pressostat ?

Chart 15CONT

A

62-47



cleco6404.0

AIR CONDITIONING




no

Chart 16THE AIR CONDITIONING TELL-TALE LIGHT DOES NOT ILLUMINATE

BUT THE AIR CONDITIONING IS OPERATING

NOTES + after ignition feed

no See Chart 17A

Check the cond ition of the + after ignition

feed fuse.

Replace it if necessary.

yes


Connect the XR25 and check that bargrap h 8

LH side illuminates when the button is

pressed

Is this correct?


yes

Check the condition of the wiring betw een

track B2 of the control panel connector and

track 7 of the red air cond itioning control un it

connector .


With the XR25 still conn ected, enter G26*

(tell-tale lights control).

Does the tell-tale light illuminate?

yes

Replace the control p anel.

If bargrap h 8 LH side is illuminated, check forthe p resence of 0 Volt on track 10 of the

control panel connector.

Is there 0 Volt?

noReplace the air conditioning control u nit.

62-48



AIR CONDITIONING


yes

Check the condition of the wiring betw een

track 9 of the control panel connector and

track 2 of the 15 track air cond itioning controlun it connector.


Chart 16A

NOTES + after ignition feed

no Replace the control panel.

Check for the pr esence of 12 Volts on track 4

of the control panel.

Is there 12 Volts?

yes

no Repair the faulty w iring.

Hold the air conditioning button dow n and

check for the p resence of 12 Volts on track 9

of the control pan el connector.

Is there 12 Volts?


yes

noRepair the w iring between the fuse

and track 4.

THE AIR CONDITIONING TELL-TALE LIGHT DOES NOT ILLUMINATEBUT THE AIR CONDITIONING IS OPERATING

Documents

All Mégane Vehicles Except Scénic