Defecte Climatizare

8/22/2019 Defecte Climatizare

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Climate control

AIR CONDITIONING

CLIMATE CONTROL

MANUAL CLIMATE CONTROL

JM0B - JM0C - JM0F - JM0G - JM0H - JM0J - JM0U

77 11 322 282

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

The procedures may be modified as a result of changes introduced by themanufacturer in the production of the various component units and accessories from

which his vehicles are constructed."

SEPTEMBER 2005

All rights are reserved by RENAULT s.a.s.

EDITION ANGLAISE

Copying or translating, in part or in full, of this document or use of the service partreference numbering system is prohibited without the prior written authority ofRENAULT s.a.s..

Renault s.a.s. 2005


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Climate control

Contents

Page

62A

62B

62C

AIR CONDITIONING

Introduction 62A-1

Fault finding log 62A-5Function layout 62A-7

General operating mode 62A-8

Configuration readings and

configurations 62A-16

Conformity check 62A-17

Customer complaints 62A-43

Fault finding chart 62A-44

CLIMATE CONTROL

Program No.: 0003 - Vdiag No.: 44

Introduction 62B-1System operation 62B-6

Allocation of computer tracks 62B-8

Configuration and programming 62B-9

Fault finding log 62B-10

Summary of faults 62B-12

Interpretation of faults 62B-13

Interpretation of statuses 62B-21

Interpretation of parameters 62B-27

Conformity check 62B-34

Customer complaints 62B-40

Fault finding chart 62B-41

Help 62B-54

MANUAL CLIMATE CONTROL

Introduction 62C-1

System operation and

allocation of tracks 62C-4

Fault finding log 62C-6

Customer complaints 62C-8

Fault finding chart 62C-9


3/138

ABBREVIATIONSABBREVIATIONS

ABBREVIATIONS MEANING OF ABBREVIATION

ABS system Anti-lock braking system

Fault Finding Chart Fault Finding Chart

APC After ignition

AVC Before ignition feed

BVA Automatic gearbox

Manual gearbox Manual gearbox

BVR Sequential gearbox

CAN Controller Area Network

AC Air conditioning

CD Compact disc

PAS Power assisted steering (hydraulic)

DAE Electric power assisted steering

DVD Digital versatile disc

DTC Fault finding code

EGR Exhaust gas recirculation

ESP Electronic Stability Program

GMV Fan assembly

CNG Compressed natural gas

LPG Liquefied petroleum gas

HLE High yield strength

MAG Metal active gas (for welding steel)

MIG Metal inert gas (for welding aluminium)

MR Workshop repair manual

TN Technical Note

OBD On board diagnostics

SER Resistance spot welding

SSPP Tyre pressure monitoring system

THLE Very high-tensile strength

TM Labour time

UCH UCH

UPC Protection and switching unit

UCT Roof control unit

UHLE Ultra high yield strength

VIN Vehicle identification number


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AIR CONDITIONING

Fault finding - Introduction 62A

62A-1

Manual air conditioningand

Climate control

162AAIR CONDITIONING

Fault finding - Introduction

1. SCOPE OF THIS DOCUMENT

This document presents the fault finding procedure applicable to all computers with the following specifications:

2. PREREQUISITES FOR FAULT FINDING

Documentation type

Fault Finding Procedures (this document and the Technical Notes for the injection fitted to the

vehicle, the UCH and the Protection and Switching Unit:

Assisted fault finding (integrated into the diagnostic tool), Dialogys.

Wiring Diagrams:

Visu-Schma (CD-ROM), paper version.

Type of diagnostic tools

CLIP

Special tooling required

3. RECAP

Procedure

To run fault finding on the vehicle's computers, switch on the ignition in fault finding mode (forced + after ignition

feed).

Proceed as follows:

Renault card in the card reader (keyless vehicle scenario 1, entry level, not hands-free and scenario 2, top of the

range, hands-free)

press and hold the Start button (longer than 5 seconds) with start-up conditions not fulfilled, connect the diagnostic tool and perform the desired operations.

To cut off + after ignition feed, proceed as follows:

disconnect the diagnostic tool,

press the Start button twice briefly (less than 3 seconds),

check that the + after ignition feed has been cut off by checking that the computer warning lights on the instrument

panel have gone out.

Vehicle: Scenic II

Function concerned: air conditioning

SPECIAL TOOLING REQUIRED

Multimeter

El. 1681 Universal bornier

Note:

The left-hand and right-hand xenon bulb computers are powered when the dipped beam headlights light up. Fault

finding procedures can only be carried out on them after the ignition has been switched on in fault finding mode

(forced + after ignition feed) and the dipped headlights are on.

CLIM X84 1.1

Edition 2


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AIR CONDITIONING


62A-2


Climate control

Faults

Faults are declared either present or stored (depending on whether they appeared in a certain situation and have

disappeared since, or whether they remain but have not been diagnosed within the current context).

The present orstored status of faults should be taken into consideration when the diagnostic tool is used after the

+ after ignition feed has been supplied (without acting on the system components).

For a present fault, apply the procedure described in the Interpretation of faults section.

For a stored fault, note the faults displayed and apply the notes section.

If the fault is confirmed when the Notes are applied, the fault is present. Deal with the fault

If the fault is not confirmed, check:

the electrical lines which correspond to the fault,

the connectors for these lines (for oxidation, bent pins, etc),

the resistance of the component detected as faulty,

The condition of the wires (insulation melted or split, chafing, etc.).

Conformity check

The aim of the conformity check is to check statuses and parameters that do not produce a fault display on the

diagnostic tool when inconsistent. Therefore, this phase is used to:

carry out fault finding on faults that do not have a fault display, and which may correspond to a customer complaint.

check that the system is operating correctly and that there is no risk of a fault recurring after repairs.

This section features the fault finding procedures for statuses and parameters, and the conditions for checking them.

If a status is not behaving normally or a parameter is outside the permitted tolerance values, consult the

corresponding fault finding page.

Notes about the conformity check for the climate control system

The air conditioning system conformity check is divided into four parts. The parts relate to the four air conditioning

subsystems, heater, cold loop, user selection and passenger compartment ventilation.

The statuses and parameters related to these sub-functions are listed with their respective computers.

NOTE: the manual air conditioning control panel does not control electrical components and cannot be subjected to

fault finding. Therefore, there is no conformity check in the 62C Manual air conditioning section.

Customer complaints Fault finding charts

If the test with the diagnostic tool is OK, but the customer complaint persists, the fault should be treated by

customer complaints.

Note:

The interpretation of statuses, parameters and commands is also split into several sections. Everything controlledby the air conditioning control panel is explained in the two Air conditioning sections, 62A and 62B. By contrast,

signals from other computers are explained in the "fault finding" sections for these computers (see the conformity

check).

A synopsis of the general procedure to follow is provided on the following

page in the form of a flowchart.

CLIM X84 1.1

Edition 2


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AIR CONDITIONING


62A-3


Climate control

4. FAULT FINDING PROCEDURE

Check the battery charge and the

condition of the fuses

Print the system fault finding log

(available on CLIP and in theWorkshop Repair Manual or

Technical Note)

Connect CLIP

Dialogue with

Electronic Control

Unit?

no

yes

Read the faults

no

Faults present

yes

Deal with present faults

Deal with stored faults

The cause is still

present

no Fault

solved

yes

See fault finding chart 1

Conformity check

The cause is still

present

no Fault

solved

Use fault finding charts (ALPs)

The cause is still

present

no Fault

solved

Contact Techline with the

completed fault finding log

CLIM X84 1.1

Edition 2


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AIR CONDITIONING


62A-4


Climate control

5. FAULT FINDING LOG

You will always be asked for this report:

when requesting technical assistance from the Techline.

for approval requests when replacing parts for which approval is obligatory.

to be enclosed when returning monitored parts on request. The log is needed for warranty reimbursement, and

enables better analysis of the parts removed.

6. SAFETY ADVICE

All work on components requires that the safety rules be obeyed to prevent damage or injury:

Make sure the battery is properly charged to avoid damaging the computers with a low load.

Use the appropriate tools.

IMPORTANT:

Any fault on a complex system requires thorough fault finding with the appropriate tools. The FAULTFINDING LOG, which should be completed during the fault finding procedure, ensures a record is kept of

the procedure carried out. It is an essential document when consulting the manufacturer.

IT IS THEREFORE COMPULSORY TO COMPLETE A FAULT FINDING LOG

EVERY TIME A FAULT FINDING PROCEDURE IS PERFORMED.

CLIM X84 1.1

Edition 2


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List of monitored parts: Computer

FAULT FINDING LOGSystem: Climate control

Page 1/2

Administrative identification

Date 2 0

Log completed by

VIN

Engine

Diagnostic tool CLIP

Update version

Customer complaint

1127 No warm air 1129 Faulty air distribution 1130 Incorrect temperature

setpoint

1128 No cold air 1125 Heating/air conditioning:

ventilation

1182 Heating/air conditioning:

demisting

Other Your comments:

Conditions under which the customer complaint occurs

011 When ignition is

switched on

005 While driving 004 Intermittently

010 Gradual

deterioration

012 When the air conditioning is

switched on

009 Sudden fault

Other Your comments:

Documentation used in fault finding

Fault finding procedure used

Type of diagnostic manual: Workshop Repair Manual Technical Note Assisted fault finding

Fault finding manual no:

Wiring diagram used

Wiring Diagram Technical Note No:

Other documentation

Title and/or part number:

FD 04

Fault finding log

page to print or photocopy - page to print or photocopy - page to print or photocopy


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To be read with the Diagnostic tool (Identification screen):

FAULT FINDING LOGSystem: Climate control

Page 2/2

Computer identification and system parts replaced

Part 1 part no.

Part 2 part no.

Part 3 part no.Part 4 part no.

Part 5 part no.

Computer part no.

Supplier no.

Program no.

Software version

Calibration no.

VDIAG

Faults found with the diagnostic tool

Fault no. Present Stored Fault name Specification

Conditions under which fault occurs

Status or parameter no. Parameter name Value Unit

Exterior temperature

Interior temperature

Refrigerant pressure

System-specific information

Description:

Additional information

What factors led you to replace the

computer?What other parts were replaced?

Other defective functions?

Your comments:

FD 04

Fault finding log

page to print or photocopy - page to print or photocopy - page to print or photocopy


10/138

AIR CONDITIONING

Fault finding - Function architecture 62A

Air conditioning system design

The air conditioning system uses four computers. The four computers are connected by the multiplex system, except

in the case of manual air conditioning, where the connection between the air conditioning control panel and the UCHis by normal wiring.

The air conditioning control panel interprets the driver's wishes and transmits them to the other computers; it also

manages the passenger compartment ventilation, air distribution, air mixing and air recirculation.

The UCH transmits the request to engage the air conditioning compressor to the injection and controls the operation

of the passenger compartment heating resistors (RCH).

The injection receives the refrigerant fluid pressure signal from the pressure sensor. The injection computer

authorises or inhibits the request to engage the compressor depending on how the vehicle is operating and transmits

the signal to the Protection and Switching Unit (UPC).

The role of the UPC is to manage the power section of the air conditioning system. It controls the engagement of the

compressor, the engine cooling fan units and the heated rear screen.

GLOSSARY

RCH = passenger compartment air heating resistors

AC control panel UCH

interpretation of driver's

wishes passenger compartment

ventilation management air distribution management air mixing management

passenger compartment air

heating resistors operationmanagement

UPC

(Power and Switching Unit)Injection computer

engine unit management

compressor control

heated rear screen control

air conditioning authorisation


Climate control Fault finding - Function architecture

CLIM X84 1.1

Edition 262A-7


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AIR CONDITIONING

Fault finding - Mode of operation 62AManual air conditioning

andClimate control Fault finding - Mode of operation

General operation

The air conditioning system is composed of four sub-functions: heating, cold loop, passenger compartment

ventilation and user selection. Fault finding on the climate control is performed in two different ways using the

diagnostic tool.The first procedure is by computer fault finding which makes it possible to communicate with just one computer

(select the computer concerned). The second procedure consists of performing fault finding by function which

allows communications to be established with all four computers of the AIR CONDITIONING function.

Description of the subsystems

Heating subsystem: this subsystem includes everything relating to the production of warm air in the vehicle and

management of the heated rear screen.

The main computers involved are the climate control computer (air mixing and blown air setpoint) and the UCH

(control and management of the passenger compartment heating resistors). The Protection and Switching Unitcontrols the heated rear screen (and heated door mirror). The injection computer is only included in this subsystem

to supply the signals required for its management.

Cold loop subsystem: this subsystem includes everything involved in the vehicle's production of cold air.

The computers concerned are the climate control computer for air mixing, the injection computer to authorise

compressor engagement and the UPC to control the compressor and the engine fan units. On climate control

systems, the UCH merely transmits the request to engage the compressor from the climate control computer to the

injection computer.

On manual air conditioning systems, the UCH authorises or inhibits transmission of the request to engage the

compressor from the climate control computer to the injection computer depending on the status of the passenger

compartment blower (with manual air conditioning, the UCH receives and manages the passenger compartment

blower speed signal: compressor engagement is inhibited if the fan is not running).

User selection subsystem: this subsystem includes everything used to transmit the user's requests (pressing

buttons). The computers concerned are the climate control computer for climate control systems and the UCH. The

two other computers are not used for manual air conditioning.

Passenger compartment ventilation subsystem (climate control systems only): this subsystem includes

everything involved in ventilation, air mixing, air recirculation and air distribution. Therefore, only the climate control

computer is involved.

CLIM X84 1.1

Edition 262A-8


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AIR CONDITIONING

Fault finding - Mode of operation 62A

Exchanges between the four air conditioning system computers

air conditioning request 1 (compressor

engagement) switch on passenger compartment heating

resistors (RCH) request

switch on heated rear screen request

(+ electric door mirrors)

passenger compartment ventilation signal

Climate

control panelUCH

passenger compartment heating resistors (RCH)

operation management

exterior temperature signal

engine coolant temperature signal

switch on heated rear screen request

(+ electric door mirrors)

UCHUPC

(Power and Switching Unit)

alternator charge signal

number of passenger compartment heating

resistors authorised by alternator

air conditioning request 2 (compressor

engagement)

fast idle request for passenger compartment

heating resistors (RCH)

UCH Injection computer

compressor engagement authorisation

engine coolant temperature signal refrigerant fluid pressure signal number of passenger compartment heating

resistors authorised by injection

compressor engagement request

switch on engine cooling fan request

Injection computerUPC


alternator charge signal


Climate control

CLIM X84 1.1

Edition 262A-9


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AIR CONDITIONING

Fault finding - Mode of operation 62AManual air conditioning

andClimate control

CLIM X84 1.1

Edition 262A-10

Summary of components controlled or managed by the climate control computer

Ventilation and climate control unit

Passengercompartment

blowerVehicle multiplex

network

Passenger

compart-ment blower

powermodule

Recir-

culation

motor

Distribution

motor

Mixing

motor

Interior

temperaturesensor

Solar radiationsensor

Actuator control Sensor management

Climate control computer (control panel)

Climate control

management

(hot and cold)

User requests

management

(buttons pressed)

Button lighting

Key:

Wire connections =

Multiplex connections =


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AIR CONDITIONING


62A-11


Climate control

Summary of components controlled or managed by the manual air conditioning computer

Ventilation and climate control unit


blower

Resistor

unit

Recircu-

lation flap

Distribution

flap

Mixing

flap Vehicle multiplexnetwork

Actuator control

Manual air conditioning computer

(control panel)

Button lights

(air conditioning button

and heated rear screen

button)

Passenger

compartment blower

operation signal

(running or stopped)

User request

management

(air conditioning button

and heated rear screen

button pressed)

UCH Transmission of requests

(air conditioning, heated

rear screen)

Key:

Wire connections =Multiplex connections =

Mechanical connections =(cable controls)

CLIM X84 1.1

Edition 2


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AIR CONDITIONING


62A-12


Climate control

Block diagram of components controlled or managed by the control panel of heater

versions without air conditioning

Ventilation unit


blower

Resistorunit

Recircu-lation flap

Distributionflap

Mixingflap Vehicle multiplex

network

Actuator control

user control panel

Button lights (heated rear

screen button)

Passenger

compartment blower

operation signal

(running or stopped)

User request

management (heated

rear screen button

pressed)

UCH Transmission of the request

to switch on the heated rear

screen

Key:

Wire connections =Multiplex connections =

Mechanical connections =(cable controls)

CLIM X84 1.1

Edition 2


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AIR CONDITIONING


Summary of components controlled or managed by the UCH

Summary of components controlled or managed by the Protection and Switching Unit

Passenger

compartment

heatingresistors (RCH)

relay No. 2

Passenger

compartment

heatingresistors (RCH)

relay No. 1

Passenger compartment

heating resistors (RCH)relay No. 3 (Scnic only)

Exterior

temperaturesensor

Vehicle

multiplex

network

Actuator control Sensor management

UCH

Air conditioning request

management

Heated rear screen

control

management

Passenger compart-

ment heating resistor

control management

Engine cooling

fan unit

Heated rear

screen and

heated door

mirrors

Climate control

compressor

Alternator:

"DF"

terminal

Actuator control Electrical availability management

UPC

"DF" terminal signal formatting

(alternator charge)

Key:

Wire connections =


62A-13


Climate control

CLIM X84 1.1

Edition 2


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AIR CONDITIONING


62A-14


Climate control

Summary of components controlled or managed by the injection computer

Refrigerant fluid

pressure sensor

Engine coolanttemperature

sensor

Vehiclemultiplex

network

Sensor management

Engine injection computer

Management of the cold loop (refrigerant fluid pressure,

switch on engine cooling fan request, compressor

engagement authorisation, etc.)

Passenger compartment

heating resistors (RCH)

authorised power

management

Key:

Wire connections =


CLIM X84 1.1

Edition 2


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AIR CONDITIONING


62A-15


Climate control

Compressor control flowchart

ET143Air

conditioning request 1

(climate control)

Climate control panel ET029 Air

conditioning button

(manual air

conditioning)

ET030Air

conditioning request 2

UCH

ET088 Compressor

engagement request

Injection computerET004Air conditioning

authorisation

UPC


Control via wire

connection

Special notes:

This flowchart shows the path of the

compressor engagement request.

Components which may block this request

are not listed (passenger compartment

blower operation signal for the UCH on

manual air conditioning version, correct

refrigerant fluid pressure for the injection,

etc.).

If the compressor does not engage (one of

the requests not transmitted): carry out aconformity check.

Climate

control

compressor

Key:

Multiplex signals.

Wire connections.

CLIM X84 1.1

Edition 2


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AIR CONDITIONING

Fault finding - Configurations and configuration reading 62A

62A-16


Climate control

Fault finding - Configurations and configuration reading

Climate control system configurations

Climate control system configuration readings

Computers Configuration Option Comment

Air conditioning (climatecontrol computers only) CF044 Vehicle type B84/L84/J84/E84 Manual configuration(with CLIP)CF117 Type of heating

resistors

Without/1000 W/

1800 W

UCH SC008 Type of UCH Configuration scenario

(possible to register all the

UCH functions).

Injection (all types)X X

Automatic computer

configuration

Protection and Switching

Unit

CF001 Type of alternator KCB1 90 BOSCH

TG11 110 VALEO

SG12 VALEO LIE8 150 BOSCH

SG15L VALEO

Other type

Manual configuration

(with CLIP)

Computers Configuration reading Option Comment

Climate control LC013 Vehicle type B84/J84/E84 None

LC043 Heating resistor without/1000 W/1800 W

UCH LC013 Type of air conditioning climate control/

manual/heating

None

LC030 Type of heating resistorswithout/1000 W/

1500 W

LC011 Vehicle type All except E8h

S3000 injection

NOTE: These

functions areonly valid for the

S3000 injection

(K4J/K4M/F4R

and F4R

Turbocharged

engines

LC009 Air conditioning connected/not

connected

Following the first

compressor engagement

request:LC009 connected

LC016 With

LC016 Air conditioning pressuresignal management

with/without

ET079 Air conditioning present yes/no ET079

LC025 Heating resistor with/without None

Protection and

Switching Unit

LC001 Type of alternator KCB1 90 BOSCH

TG11 110 VALEO

SG12 VALEO

LIE8 150 BOSCH

SG15L VALEO

Other type

None

CLIM X84 1.1

Edition 2


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AIR CONDITIONING

Fault finding - Conformity check 62AManual air conditioning

andClimate control Fault finding - Conformity check

Subsystem: cold loop

NOTES

Only carry out this conformity check after a full check with the diagnostic tool (fault

reading and configuration checks).

Test conditions: ignition on (12 volts APC), engine stopped, AIR CONDITIONING

SWITCHED OFF (passenger compartment blower switched off and air conditioningcompressor not engaged).

NOTE: To check that the temperature parameters are correct (without a thermometer),

read these parameters when the vehicle is cold (in the morning). The temperatures

should be approximately equal (interior, exterior and engine coolant).

Fault finding procedures for the statuses, parameters and commands listed in this

check are explained in the Technical Notes relating to the computer which generates

the signal (see the Introduction section).

Computer

(signal generator)

Parameter or status

checked or actionDisplay and Notes Fault finding

Climate control

ET143: Air conditioning

request 1.

ACTIVE for air conditioning

request (AC button pressed

orAUTO button pressed

with "maximum cold"

request).

INACTIVE otherwise.

NOTE: This status is only

valid forclimate control

systems.

If there is a fault, refer to the

fault finding procedure

for this status.

NOTE: This status

represents the request from

the climate control

computer to the UCH to

engage the compressor

(refer to the flowchart in

the general operation

section).

PR001: Interior

temperature.

X = interior temperature

5 C

(invalid value: 87.5 C)



for this parameter.

ET141: Passenger

compartment

blower.

STOPPED

(according to test

conditions: see Notes).



for this status.


operative forclimate

control systems.

PR012: Mixing flap

position.

0% = Max. cold position

(15 C)

100% = Max. warm position

(27 C)



for this parameter.

PR006: Solar radiation. 0 watts (no solar radiation)

to 400 watts (maximum

solar radiation).



for this parameter.

CLIM X84 1.1

Edition 262A-17


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AIR CONDITIONING

Fault finding - Conformity check 62A

62A-18


Climate control

Subsystem: cold loop (continued 1)

Computer

(signal generator)

Parameter or status

checked or action Display and Notes Fault finding

UCH


request 2.

INACTIVE

(engagement of the

compressor is only

authorised when the engine

is running).



for this status.

NOTE: This status


the UCH to the injection

computer to engage the

compressor (refer to the

flowchart in the general

operation section).

PR002: Exterior

temperature.

X = exterior temperature

5 C(invalid value: 215 C)


fault finding procedurefor this parameter.

ET015: Passenger

compartment

blower.

INACTIVE

(according to test




for this status.


operative formanual airconditioning (and heating

versions without air

conditioning).

ET091: Engine running. NO

NOTE: This status is

displayed by the UCH but it

is generated by the injection

computer.



for this status.

(Injection Technical Note).

Injection


present.

YES

(automatic injection

computer configuration).

If the status displays NO,

refer to the fault finding

procedure for this status.

PR064: Coolant

temperature.

X = engine coolant

temperature.



for this parameter.


authorisation.

NO

(no authorisation with

engine stopped).



for this status.

CLIM X84 1.1

Edition 2


22/138

AIR CONDITIONING


62A-19


Climate control


Computer

(signal generator)

Parameter or status


Injection

(continued 1)

ET088: Compressor

activation request.

INACTIVE

(engagement of the

compressor is only

authorised when the engine

is running).



for this status.

NOTE: This status


the injection computer to

the Protection and

Switching Unit to engage

the compressor (refer to the


operation section).

PR089: Vehicle speed. 0 mph or km/h If there is a fault, refer to thefault finding procedure

for this parameter.

PR055: Engine speed. 0 rpm. If there is a fault, refer to the


for this parameter.

ET023: Fast idle request

(except EDC 16

injection).

ABSENT If there is a fault: refer to the


for this status.

NOTE: This status is not

displayed by the EDC16

injection (F9Q engine).

PR053: Engine speed

required by air

conditioning

(except S3000 and

DDCR injections).

0 rpm. If there is a fault, refer to the


for this parameter.

NOTE: This parameter is

only displayed by the

EDC16 injection (F9Q

engine).

PR037: Refrigerant

pressure.

1 bar < X < 15 bar If there is a fault, refer to the


for this parameter.

PR125: Power absorbed

by AC

compressor.

0 W < X < 300 W

(ambient temperature

23 C)



for this parameter.

CLIM X84 1.1

Edition 2


23/138

AIR CONDITIONING


62A-20


Climate control


Computer

(signal generator)

Parameter or status


Injection

(continued 2)

ET022: Low speed fan

request (except

3000 injection)

INACTIVE


displayed by the S3000

injection (K4J, K4M, F4R

and F4RT engines).



for this status.

For more information

(Control of Fan 1 or

Fan 2 according to

vehicle speed and

refrigerant fluid

pressure), refer to the

HELP section (62B).

ET021: High speed fan

request (exceptS3000 injection).

INACTIVE

NOTE: This status is notdisplayed by the S3000


and F4RT engines).


fault finding procedurefor this status.



Fan 2 according to

vehicle speed and

refrigerant fluidpressure), refer to the

HELP section (62B).

ET014: Fan unit 1 check

(except DDCRinjection).

STOPPED If there is a fault, refer to the



displayed by the DDCR

injection (K9K engine).


(except DDCR

injection).

STOPPED If there is a fault, refer to the


for this status.




CLIM X84 1.1

Edition 2


24/138

AIR CONDITIONING


62A-21


Climate control


Computer

(signal generator)

Parameter or status


Protection and

Switching Unit


control.

INACTIVE

(On Mgane saloons and

sport hatches this status is

always

ACTIVE: ignore it).



for this status.


operative on Mgane

Scnics (2 engine cooling

fans and Fan unit 2 relay

outside the UPC).

AC008: Compressor

control.

Command for testing the

operation of the airconditioning compressor

clutch.

If there is a fault, consult the

fault finding procedurefor this command.

NOTE: The UPC cannottest the compressor control

circuit; this command is the

only way to test its

operation.

AC009: Low speed fan

unit.


low speed operation of theengine cooling fan unit

(Fan unit 1).



NOTE: The UPC cannot

test the control circuit for

Fan unit 1; this command isthe only way to test its

operation.

AC010: High speed fan

unit


high speed operation of

the engine cooling fan unit

(Fan unit 2).



for this command.

NOTE: On Mgane saloons

and sport hatches the UPC

cannot test the control

circuit for Fan unit 2; this

command is the only way to

test its operation.

On Mgane Scnics, theFan unit 2 control relay is

outside the UPC and its

control line is tested by

(DF002 High speed fan

control relay circuit).

CLIM X84 1.1

Edition 2


25/138

AIR CONDITIONING


62A-22


Climate control

Subsystem: heating

NOTES











Computer

(signal generator)

Parameter or status


Climate control

ET086: Heated rear

screen: manual

mode.

ACTIVE: De-icing button at

the bottom of the control

panel pressed.

INACTIVE otherwise.



for this status.

ET085: Heated rear

screen: auto

mode.


the top of the control panel

pressed ("See clear"

function).

INACTIVE otherwise.



for this status.

PR121: Blown air

temperature

setpoint.

0 < X < 80 C. If there is a fault, refer to the


for this parameter.

PR001: Interior

temperature.


5 C

(invalid value: 87.5 C).



for this parameter.

PR012: Mixing flap

position.

0 % = Max. cold position (15

C)

100 % = Max. hot position

(27 C)



for this parameter.

ET141: Passenger

compartment

blower.

OFF

(according to test




for this status.



control systems.

CLIM X84 1.1

Edition 2


26/138

AIR CONDITIONING


62A-23


Climate control

Subsystem: heating (continued 1)

Computer

(signal generator)

Parameter or status


UCH

PR001: Battery voltage. 10.5 < X < 14.4 volts. If there is a fault, refer to the


for this parameter.If the

fault is still present, carry

out a fault finding test on

the charge circuit.

PR002: Exterior

temperature.


5 C

(invalid value: 215 C).



for this parameter.

ET025: Retractable roof. CLOSED orNOT CLOSEDABSENT if the vehicle does

not have one.

If there is a fault, refer to thefault finding procedure

for this status.

ET091: Engine running: NO


displayed via the UCH but it


computer.



for this status.


ET015: Passenger

compartment

blower.

INACTIVE

(according to test




for this status.

NOTE: This status is onlyoperative formanual air

conditioning (and heater


conditioning).

ET026: Heated rear

screen switch.

INACTIVE

(Inhibited with engine

stopped).



for this status.


for RCH.

INACTIVE


stopped).



for this status.

ET017: Number RCH

required.

0, 1, 2 or 3 for Mgane

saloons and sport hatches

(1000 watt RCH).

0, 1, 2, 3, 4 or 5 for Mgane

Scnics (1800 watt RCH).

(according to heat

requirement).



for this status.

CLIM X84 1.1

Edition 2


27/138

AIR CONDITIONING


62A-24


Climate control


Computer

(signal generator)

Parameter or status


UCH

(continued)

ET018: Number RCH

authorised by

alternator.

0


stopped).



for this status.

ET019: Number RCH

authorised by

injection.

0


stopped).



for this status.

ET020: Number RCH

actuated.

0


stopped).



for this status.

ET021: RCH no. 1 control

relay.

INACTIVE

(Inhibited with enginestopped).




relay.

INACTIVE


stopped).



for this status.

ET023: RCH no. 3 controlrelay (Mgane

Scnic and

Scnic 4x4 only).

INACTIVE(Inhibited with engine

stopped).


for this status.


inoperative for Mganesaloons and Mgane sport

hatches.

AC016: RCH no. 1 relay. Commands for testing the

operation of the RCH

(passenger compartment

air heating resistors). The

number of RCH stages

switched on depends on the

number of relays actuated.

NOTE: RCH no. 3 relay is

only fitted to Mgane

Scnics.



for these controls.

NOTE: To find the relays

actuated/number of RCH

engaged correlation, refer

to the "general operation"

section of the UCH

Technical Note.

AC017: RCH no. 2 relay.

AC018: RCH no. 3 relay

(Mgane Scnic

only).

CLIM X84 1.1

Edition 2


28/138

AIR CONDITIONING


62A-25


Climate control


Computer

(signal generator)

Parameter or status


Injection

ET024: Set number of

RCH.

NO

NOTE:According to the

injection's requirements:

power requirement, torque

reduction, etc., the injection

computer sets the number

of RCH stages switched on

(no more, no less).



for this status.

PR064: Coolant

temperature.

X = engine coolant

temperature.



for this parameter.

Protection and

Switching Unit

PR002: Alternator chargesignal

99 %, engine stopped. If there is a fault, refer to thefault finding procedure

for this parameter.

AC011: Heated rear

screen.


operation of the rear screen

heating.



for this command.

NOTE: The UPC cannottest the heated rear screen

control circuit; this


test its operation.

CLIM X84 1.1

Edition 2


29/138

AIR CONDITIONING


62A-26


Climate control

Subsystem: user selection

NOTES





NOTE: The interpretation of the statuses, parameters and controls listed in this check

is explained in the Technical Notes relating to the computer which generates the signal

(see the Introduction section).

Computer

(signal generator)

Parameter or status


Climate control

ET086: Heated rear

screen: manual

mode.


the bottom of the control

panel pressed.

INACTIVE otherwise.



for this status.

ET085: Heated rear

screen: auto

mode.




function).

INACTIVE otherwise.



for this status.


request 1.

ACTIVE for air conditioning

request (AC button pressedorAUTO button pressed

with "maximum cold"

request).

INACTIVE otherwise.

Note: This status is only


systems.



NOTE: This status


the climate control

computer to the Passenger

Compartment Control Unit

to engage the compressor



section).

CLIM X84 1.1

Edition 2


30/138

AIR CONDITIONING


62A-27


Climate control

Subsystem: user selection (continued)

Computer

(signal generator)

Parameter or status


UCH


button.

PRESSED if the AC button

on the air conditioning

control panel is pressed.

RELEASED otherwise.



for this status.


operative formanual air

conditioning.

ET028: Heated rear

screen button.

PRESSED if the heated

rear screen button on the

air conditioning control

panel is pressed.RELEASED otherwise.



for this status.


conditioning (and heaterversions without air

conditioning).

ET015: Passenger

compartment

blower.

INACTIVE

(according to test




for this status.


conditioning (and heater


conditioning).

AC015: Air conditioning

button light.

Command enabling the air

conditioning button light to

be illuminated to check its

operation.



for this command.

NOTE: This command only

operates formanual air

conditioning.

AC019: Heated rear

screen indicator

light.

Command enabling the

heated rear screen button

light to be illuminated to

check its operation.



for this command.


operates formanual airconditioning (and heater


conditioning).

CLIM X84 1.1

Edition 2


31/138

AIR CONDITIONING


62A-28


Climate control

Subsystem: passenger compartment ventilation

NOTES







should be approximately equal (interior, exterior and engine coolant). Fault finding

procedures for the statuses, parameters and commands listed in this check are

explained in the Technical Notes relating to the computer which generates the signal


Computer

(signal generator)

Parameter or status


Climate control

PR019: Passenger

compartment

blower PWM

setpoint.

Speed 0 = 0 %.

Speed 8 = 100 %.

NOTE: The "PWM" signal is

a modulated control voltage

used to control the

passenger compartment

blower power module.

If there is a fault or formore

information (to find the

intermediate speed

percentages), refer to the


for this parameter.

PR012: Mixing flap

position.


C)100 % = Max. warm

position (27 C)



ET062: Recirculation flap

position.

OPEN if the flap is in the

outside air position.

CLOSED if the flap is in the

recirculation position.



for this status.

PR011: Distribution flap

position.

from 0 % to 100 %.

NOTE:

0 % = Full air vents position

100 % = De-icing position.


information (various flap

opening values according

to the user selection), refer

to the fault findingprocedure for this

parameter.

CLIM X84 1.1

Edition 2


32/138

AIR CONDITIONING


62A-29


Climate control

Subsystem: passenger compartment ventilation (continued)

Computer

(signal generator)

Parameter or status


Climate control

(continued)

PR001: Interior

temperature.


5 C



fault finding procedure for

this parameter.

PR002: Exterior

temperature.


5 C

(invalid value: 215 C).NOTE: This status is

displayed via the climate

control computer but is

generated by the UCH.


fault finding procedure for

this parameter(UCHTechnical Note).


to 400 watts (maximumsolar radiation).


fault finding procedure forthis parameter.

CLIM X84 1.1

Edition 2


33/138

AIR CONDITIONING


62A-30


Climate control

Subsystem: cold loop

NOTES



Test conditions: engine at idle speed, AIR CONDITIONING OPERATING (air

conditioning compressor engaged).NOTE: To check that the temperature parameters are correct (without a thermometer),






Computer(signal generator)

Parameter or statuschecked or action

Display and Notes Fault finding

Climate control


request 1.

ACTIVE



systems.



for this status.

NOTE: This status


the climate control





section).

PR001: Interior

temperature.


5 C

(invalid value: 87.5 C)



for this parameter.

ET141: Passenger

compartment

blower.

RUNNING

(according to test




for this status.



control systems.

PR012: Mixing flapposition.

0% = Max. cold position(15 C)


(27 C)


for this parameter.


to 400 watts (maximum

solar radiation).



for this parameter.

CLIM X84 1.1

Edition 2


34/138

AIR CONDITIONING


62A-31


Climate control


Computer

(signal generator)

Parameter or status


UCH


request 2.

ACTIVE If there is a fault, refer to the


for this status.

NOTE: This status


the UCH to the injection

computer to engage the

compressor (refer to the


operation section).

PR002: Exterior

temperature


5 C(invalid value: 215 C)



ET015: Passenger

compartment

blower.

ACTIVE

(according to test




for this status.

Note: This status is only

operative formanual airconditioning(and heater


conditioning).

ET091: Engine running: YES




computer.



for this status.


Injection


present.

YES

(automatic injection

computer configuration).

If the status displays NO,

consult the fault finding


PR064: Coolant

temperature.

X = engine coolant

temperature.



for this parameter.


authorisation.

YES If the status displays NO,

consult the fault finding


CLIM X84 1.1

Edition 2


35/138

AIR CONDITIONING


62A-32


Climate control


Computer

(signal generator)

Parameter or status


Injection

(continued 1)

ET088: Compressor

activation request.

ACTIVE If the status displays

INACTIVE, consult the


for this status.

NOTE: This status


the injection computer to

the Protection and

Switching Unit to engage

the compressor (refer to the

flowchart in the generaloperation section).

PR089: Vehicle speed. 0 mph (0 km/h) If there is a fault, refer to the


for this parameter.

PR055: Engine speed. 800 rpm. If there is a fault, refer to the


for this parameter.


(except EDC 16

injection).

PRESENT If there is a fault: refer to the


for this status.


displayed by the EDC16

injection (F9Q engine).

PR053: Engine speed

requested by air

conditioning

(except S3000 and

DDCR injections).

800 rpm. If there is a fault, refer to the


for this parameter.

NOTE: This parameter is

only displayed by the

EDC16 injection (F9Q

engine).

PR037: Refrigerant

pressure.

1 bar < X < 27 bar If there is a fault, refer to the


for this parameter.

PR125: Power absorbed

by air conditioning

compressor.

300 W < X < 5000 W

(ambient temperature

23 C)



for this parameter.

CLIM X84 1.1

Edition 2


36/138

AIR CONDITIONING


62A-33


Climate control


Computer

(signal generator)

Parameter or status


Injection

(continued 2)

ET022: Low speed fan

request (except

3000 injection)

ACTIVE if the refrigerant

fluid pressure is less than

23 bar

INACTIVE otherwise




and F4RT engines).



for this status.



Fan 2 according to

vehicle speed and

refrigerant fluid

pressure), refer to the

HELP section (62B).


request (exceptS3000 injection).

ACTIVE if the refrigerant

fluid pressure is more than23 bar

INACTIVE otherwise




and F4RT engines).





Fan 2 according to

vehicle speed and

refrigerant fluidpressure), refer to the

HELP section (62B).


(except DDCRinjection).

RUNNING if the refrigerant

fluid pressure is less than23 bar

OFF otherwise







(except DDCR

injection).

RUNNING if the refrigerant

fluid pressure is more than

23 bar

OFF otherwise



for this status.




CLIM X84 1.1

Edition 2


37/138

AIR CONDITIONING


62A-34


Climate control


Computer

(signal generator)

Parameter or status


Protection and

Switching Unit


control.

INACTIVE

(On Mgane saloons and

sport hatches this status is

always ACTIVE: ignore it).



for this status.


operative on Mgane

Scnics (2 engine cooling

fans and Fan unit 2 relay

outside the UPC).

AC008: Compressor

control.


operation of the airconditioning compressor

clutch.



NOTE: The UPC cannottest the compressor control

circuit, this command is the

only way to test its

operation.

AC009: Low speed fan

unit.


low speed operation of theengine cooling fan unit

(Fan 1).



NOTE: The UPC cannot

test the control circuit for

Fan unit 1; this command isthe only way to test its

operation.

AC010: High speed fan

unit


high speed operation of

the engine cooling fan unit

(Fan 2).



for this command.

NOTE: On Mgane saloons

and sport hatches the UPC

cannot test the control

circuit for Fan unit 2; this


test its operation.

On Mgane Scnics, theFan unit 2 control relay is

outside the UPC and its

control line is tested by

(DF002 High speed fan

control relay circuit).

CLIM X84 1.1

Edition 2


38/138

AIR CONDITIONING


62A-35


Climate control

Subsystem: heating

NOTES




conditioning compressor engaged).NOTE: The interpretation of the statuses, parameters and controls listed in this check



Computer

(signal generator)

Parameter or status


Climate control

ET086: Heated rearscreen: manual

mode.

ACTIVE: De-icing button atthe bottom of the control

panel pressed.

INACTIVE otherwise.


for this status.

ET085: Heated rear

screen: auto

mode.




function).

INACTIVE otherwise.



for this status.

PR121: Blown air

temperature

setpoint.

0 < X < 80 C. If there is a fault, refer to the


for this parameter.

PR001: Interior

temperature.


5 C




for this parameter.

PR012: Mixing flap

position.

0% = Max. cold position

(15 C)


(27 C)



for this parameter.

ET141: Passenger

compartment

blower.

RUNNING.

(according to test




for this status.



control systems.

CLIM X84 1.1

Edition 2


39/138

AIR CONDITIONING


62A-36


Climate control


Computer

(signal generator)

Parameter or status


UCH

PR001: Battery voltage. 12.5 < X < 14.4 volts. If there is a fault, refer to the


for this parameter. If the

fault is still present, carry

out fault finding on the

charge circuit.

PR002: Exterior

temperature.


5C

(invalid value: 215 C).



for this parameter.

ET025: Retractable roof. CLOSED orNOT CLOSEDABSENT if the vehicle does

not have one.


for this status.

ET091: Engine running: YES




computer.



for this status.


ET015: Passenger

compartment

blower.

ACTIVE

(according to test




for this status.


conditioning(and heater


conditioning).

ET026: Heated rear

screen switch.

ACTIVE if the heated rear

screen is operating.

INACTIVE otherwise.



for this status.


for RCH.

ACTIVE if the RCH are

operating.

INACTIVE otherwise.



for this status.

ET017: Number RCH

required.



(1000 watt RCH).

0, 1, 2, 3, 4 or 5 for Mgane


(according to heat

requirement).



for this status.

CLIM X84 1.1

Edition 2


40/138

AIR CONDITIONING


62A-37


Climate control


Computer

(signal generator)

Parameter or status


UCH

(continued 1)

ET018: Number RCH

authorised by

alternator.



(1000 watt RCH).

0, 1, 2, 3, 4 or 5 for Mgane


(depending on the electrical

availability).



for this status.

ET019: Number RCH

authorised by

injection.



(1000 watt RCH).0, 1, 2, 3, 4 or 5 for Mgane

Scnics (1800 watt RCH).(according to the injection's

requirements: power

requirement, torque

reduction, etc.).



for this status.

ET020: Number RCH

actuated.


saloons and sport hatches(1000 watt RCH).

0, 1, 2, 3, 4 or 5 for Mgane


(depending on statuses"ET017, ET018 and

ET019").




relay.

ACTIVE orINACTIVE

(depending on status

ET020).



for this status.


relay.

ACTIVE orINACTIVE


ET020).



for this status .


relay (Mgane

Scnic and

Scnic 4x4 only).

ACTIVE orINACTIVE


ET020).



for this status.


inoperative for Mgane

saloons and Mgane sport

hatches.

CLIM X84 1.1

Edition 2


41/138

AIR CONDITIONING


62A-38


Climate control


Computer

(signal generator)

Parameter or status


UCH

(continued 2)

AC016: RCH no. 1 relay. Commands for testing the

operation of the RCH

(passenger compartment

air heating resistors). The

number of RCH stages

switched on depends on the

number of relays actuated.

NOTE: RCH no. 3 relay is

only fitted to Mgane

Scnics.



for these controls.

NOTE: To find the relays

actuated/number of RCH

engaged correlation, refer

to the "general operation"

section of the UCH

Technical Note.



(Mgane Scnics

only)

Injection

ET024: Set number of

RCH.

YES orNO

NOTE:According to theinjection's requirements:

power requirement, torque

reduction, etc., the injection

computer sets the number

of RCH stages switched on

(no more, no less).



PR064: Coolant

temperature.

X = engine coolant

temperature.



for this parameter.

Protection and

Switching Unit

PR002: alternator charge

signal

0 < X


42/138

AIR CONDITIONING


62A-39


Climate control

Subsystem: user selection

NOTES




conditioning compressor engaged).NOTE: The interpretation of the statuses, parameters and controls listed in this check



Computer

(signal generator)

Parameter or status


Climate control

ET086: Heated rearscreen: manual

mode.

ACTIVE: De-icing button atthe bottom of the control

panel pressed.

INACTIVE otherwise.


for this status.

ET085: Heated rear

screen: auto

mode.




function).

INACTIVE otherwise.



for this status.


request 1.

ACTIVE


valid forclimate controlsystems.



for this status.NOTE: This status


the climate control





section).

CLIM X84 1.1

Edition 2


43/138

AIR CONDITIONING


62A-40


Climate control

Subsystem: user selection (continued)

Computer

(signal generator)

Parameter or status


UCH


button.

PRESSED

(AC button on the manual


panel pressed).



for this status.


operative formanual air

conditioning.

ET028: Heated rear

screen button.

PRESSED if the heated

rear screen button on the


panel is pressed.RELEASED otherwise.



for this status.


conditioning(and heaterversions without air

conditioning).

ET015: Passenger

compartment

blower.

ACTIVE

(according to test




for this status.


conditioning(and heater


conditioning).

AC015: Air conditioning

button light.

Command enabling the air

conditioning button light to

be illuminated to check its

operation.



for this command.


operates formanual air

conditioning.

AC019: Heated rear

screen indicator

light.

Command enabling the

heated rear screen button

light to be illuminated to

check its operation.



for this command.


operates formanual airconditioning (and heater


conditioning).

CLIM X84 1.1

Edition 2


44/138

AIR CONDITIONING


62A-41


Climate control

Subsystem: passenger compartment ventilation

NOTES




conditioning compressor engaged).NOTE: To check that the temperature parameters are correct (without a thermometer),


should be approximately equal (interior, exterior and engine coolant). Fault finding

procedures for the statuses, parameters and commands listed in this check are

explained in the Technical Notes relating to the computer which generates the signal


Computer(signal generator)

Parameter or statuschecked or action

Display and Notes Fault finding

Climate control

PR019: Passenger

compartment

blower

PWM setpoint.

from 18 % to 100 %.

(18 % corresponds to

speed 1)

NOTE: The "PWM" signal is

a modulated control voltage

used to control the

passenger compartment

blower power module.


information (to find the

intermediate speed

percentages), refer to the


for this parameter.

PR012: Mixing flap

position.


C)100 % = Max. warm

position (27 C)



ET062: Recirculation flap

position.

OPEN if the flap is in the

outside air position.

CLOSED if the flap is in the

recirculation position.



for this status.

PR011: Distribution flap

position.

from 0 % to 100 %.

NOTE:

0 % = Full air vents position

100 % = De-icing position


information (various flap

opening values according

to the user selection), refer

to the fault findingprocedure for this

parameter.

CLIM X84 1.1

Edition 2


45/138

AIR CONDITIONING


62A-42


Climate control

Subsystem: passenger compartment ventilation (continued)

Computer

(signal generator)

Parameter or status


Climate control

(continued)

PR001: Interior

temperature.


5 C




for this parameter.

PR002: Exterior

temperature.


5 C

(invalid value: 215 C).NOTE: This status is

displayed via the climate

control computer but is

generated by the UCH.



for this parameter(UCHTechnical Note).


to 400 watts (maximumsolar radiation).



CLIM X84 1.1

Edition 2


46/138

AIR CONDITIONING

Fault finding - Customer complaints 62AManual air conditioning

andClimate control Fault finding - Customer complaints

NOTES

Special notes:

This section gives the complete list of possible customer complaints (the fault finding

charts are to be found in sections 62A, 62B and 62C: see below).

COMMUNICATION FAULT

(only for climate control versions)

Section 62B

NO DIALOGUE WITH THE COMPUTER ALP 1

AIR DISTRIBUTION FAULT Sections 62B and 62C

AIR DISTRIBUTION FAULT ALP 2

AIR FLOW FAULT ALP 3

INEFFICIENT WINDSCREEN DEMISTING ALP 4

NO PASSENGER COMPARTMENT VENTILATION ALP 5

CLIMATE CONTROL FAULT Section 62A

NO HEATING OR INADEQUATE HEATING ALP 6

TOO MUCH HOT AIR ALP 7

NO COLD AIR ALP 8

TOO MUCH COLD AIR ALP 9

INEFFICIENT REAR SCREEN DE-ICING OR DEMISTING ALP 10

ODOUR PROBLEM IN PASSENGER

COMPARTMENT

Sections 62B and 62C

UNPLEASANT ODOURS IN PASSENGER COMPARTMENT ALP 11

WATER IN PASSENGER COMPARTMENT Sections 62B and 62C

WATER PRESENT IN PASSENGER COMPARTMENT ALP 12

CONTROL PANEL FAULT Sections 62B and 62C

NO CONTROL PANEL LIGHTING ALP 13

COMPRESSOR NOISE Section 62A

NOISY COMPRESSOR ALP 14

CLIM X84 1.1

Edition 262A-43


47/138

AIR CONDITIONING

Fault finding - Fault Finding Chart 62A

62A-44


Climate control Fault finding - Fault Finding Chart

ALP 6 No heating or inadequate heating

NOTESOnly refer to this customer complaint after a full check with the diagnostic tool

(fault reading and configuration checks).

Is the air flow correct?

YES

Is the air distribution correct?

YES

With the engine warm, select the MAX warm position.

Is the air supplied hot?

NO

Using the diagnostic tool statuses and parameters

screen (cold loop sub-function), check that thetemperature signals are consistent (no sensor drift

resulting in incorrect measurement).

For manual air conditioning systems:

Outside airtemperature and engine coolant

temperature.

For climate control systems:

Outside airtemperature, engine coolant

temperature and interior airtemperature.

Also check that the interior air temperature sensor

micro-turbine is operating correctly (this can falsify the

measurement if it malfunctions).

Are the temperature signals consistent?

YES

NO

NO

YES

NO

See ALP 3, air flow fault.

See ALP 2, air distribution fault.

If necessary, explain how the

system works to the customer

again.

Carry out a conformity check on

the sensors (refer to the relevantsection).

Replace any defective components.

AFTER REPAIR Perform a complete check using the diagnostic tool.

CLIM X84 1.1

Edition 2


48/138

AIR CONDITIONING

Fault finding - Fault Finding Chart 62A

62A-45


Climate control

ALP 6

CONTINUED

With the engine warm and

passenger compartment ventilation

operating, vary the position of the

mixing flap from the maximum cold

position to the maximum warm

position and check subjectively that

there is a difference in temperature.

Can you feel the difference intemperature?

YES

NO

For climate control systems:

Carry out a conformity check on the mixing motor

(PR012 mixing motor). If the conformity check does not

reveal any faults, look for a mechanical fault on themixing flap (condition of the motor's toothed sector, flap

jammed inside the unit, etc.).

For manual air conditioning and heater versions:

Check the condition and routing of the mixing flap

control cable. Eliminate any constraints on it: kinks,

cable restricted by plastic clips, etc. Replace it ifnecessary. Unclip the cable from the side of the unit and

check the stiffness of movement of each component:control button and flap control on the air distribution unit.

Check that there is no mechanical fault on the mixing

flap (flap jammed inside the unit, etc.).

Carry out any necessary repairs.

Is the fault still present?

YES

Is the heater matrix lowerpipe

(coolant inlet) hot?

NOTE: pipe located on the left-hand

side of the heater/air conditioning

unit, near the engine compartmentbulkhead.

YES

Check that the heater matrix is not blocked: the heater matrix upperpipe should be hot.

NOTE: pipe located on the left-hand side of the heater/air conditioning unit, near the engine

compartment bulkhead. Clean the heater matrix or replace it if necessary.

Is the fault still present?

YES NO

If the vehicle is fitted with passenger compartment heating

resistors (RCH), check that these are operating correctly by

referring to the fault finding procedure in the UCH Technical Note.

NO

Carry out a check on the coolant circuit and

ensure that the thermostatic valve opens at the

correct temperature.

Replace the valve if necessary.

NO

End of fault finding procedure.

Documents

Defecte Climatizare