ESP RENAULT SCENIC 2010 J95 / 3.G Air Conditioning Workshop Manual

62A - 2
AIR CONDITIONING
ABBREVIATIONS62A
V4
Manual air conditioning
and
Climate control
ABBREVIATIONS MEANING OF ABBREVIATION
ABS systemAnti-lock braking system
Fault Finding Chart Fault Finding Chart
APCAfter ignition
AVCBefore ignition feed
BVAAutomatic gearbox
Manual gearboxManual gearbox
BVRSequential gearbox
CANController Area Network
ACAir conditioning
CDCompact disc
PASPower assisted steering (hydraulic)
DAEElectric power assisted steering
DVDDigital versatile disc
DTCFault finding code
EGRExhaust gas recirculation
ESPElectronic Stability Program
GMVFan assembly
CNGCompressed natural gas
LPG Liquefied petroleum gas
HLEHigh yield strength
MAGMetal active gas (for welding steel)
MIGMetal inert gas (for welding aluminium)
MRWorkshop repair manual
TNTechnical Note
OBDOn board diagnostics
SERResistance spot welding
SSPPTyre pressure monitoring system
THLEVery high-tensile strength
TMLabour time
UCHUCH
UPCProtection and switching unit
UCTRoof control unit
UHLEUltra high yield strength
VINVehicle identification number
162AAIR CONDITIONING
ABBREVIATIONS
MR-372-J84-62A000$010.mif

62A - 4
AIR CONDITIONING
Fault finding - Introduction62A
V4
Manual air conditioning
and
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 or stored 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 controlled
by 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
MR-372-J84-62A000$020.mif

62A - 41
AIR CONDITIONING
Fault finding - Conformity check62A
V4
Manual air conditioning
and
Climate control
Subsystem: passenger compartment ventilation
NOTESOnly carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
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),
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 controlPR019: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.If there is a fault or for more
information (to find the
intermediate speed
percentages), refer to the
fault finding procedure
for this parameter.
PR012:Mixing flap
position.0 % = Max. cold position (15
˚C)
100 % = Max. warm
position (27 ˚C)If there is a fault, refer to the
fault finding procedure
for this parameter.
ET062:Recirculation flap
position.OPEN if the flap is in the
outside air position.
CLOSED if the flap is in the
recirculation position.If there is a fault, refer to the
fault finding procedure
for this status.
PR011:Distribution flap
position.from 0 % to 100 %.
NOTE:
0 % = Full air vents position
100 % = De-icing positionIf there is a fault or for more
information (various flap
opening values according
to the user selection), refer
to the fault finding
procedure for this
parameter.
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$060.mif

AIR CONDITIONING
Fault finding - Fault Finding Chart62A
62A-56V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate control
ALP 10 Inefficient rear screen de-icing or demisting
NOTESOnly refer to this customer complaint after a full check with the diagnostic tool (fault
readings, especially those of the Protection and Switching Unit, and configuration
checks).
Special notes:
–Check that the inside of the glass is not greasy as this lowers the de-icing efficiency.
N.B.: for electric power drain reasons, de-icing can only be activated when the
engine is running.
Rear screen de-icing can be activated in two ways:
–Pressing the de-icing button (at the bottom of the control panel) switches on the
heated rear screen in manual mode (with timer) and heated door mirrors.
–Pressing the de-icing button at the top of the control panel activates the "See clear"
function: heated rear screen in automatic mode (no timer) heated door mirrors, air
conditioning and high speed windscreen ventilation all switched on.
Check that there are no water leaks into the passenger compartment
which would significantly increase the humidity levels and reduce the
effectiveness of demisting. Repair if necessary (see ALP 12).
Is the fault still present?
YES
Check for earth on the right-hand side terminal of the heated rear screen.
Repair if necessary.
Use the diagnostic tool to run command AC011 Heated
rear screen (Protection and Switching Unit command
mode menu).
Is the 12 V feed present on the left-hand connector
of the heated rear screen?
NO
NO
YESEnd of fault finding
procedure.
If the 12 V feed and earth both arrive
correctly at the heated rear screen
terminals but the screen still does not
operate correctly: unclip the plastic
rear screen pillars and check that the
de-icing lines are not broken. The
resistance of the lines should be
neither zero nor infinity (average
0.5 Ω). Repair if necessary.
AFTER REPAIRPerform a complete check using the diagnostic tool.
CLIM X84 1.1
Edition 2

62A-59
AIR CONDITIONING
Fault finding - Fault Finding Chart62A
V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate control
ALP 14 Air conditioning noises during operation
NOTESOnly deal with this customer complaint after a full check with the diagnostic tool
(fault reading and configuration checks).
Check that the computers involved in the air conditioning function (Injection, Protection and
Switching Unit, UCH and Air conditioning control panel) are correctly configured.
Reconfigure if necessary (see Configurations and Configuration readings).
Check that:
–the compressor fitted to the vehicle corresponds correctly to the engine (see MR 370 Mechanical, 62A, Air
conditioning, Air conditioning: Parts and consumables for the repair).
Replace the compressor if necessary (see MR 370, Mechanical, 62A, Air conditioning, Compressor: Removal
- Refitting).
–the compressor is correctly fixed (see MR 370 Mechanical, 62A, Air conditioning, Compressor: Removal -
Refitting).
Check the condition of the compressor belt and check its tension. Replace the belt if necessary (see MR 370
Mechanical, 11A, Top and front of engine, Accessories belt: Removal - Refitting).
Check that the intermediate pipes, condenser and dehydrator reservoir are correctly fitted.
–Check the mountings and brackets of the components.
–Check the contact between and proximity of the components.
(see MR 370 Mechanical, 62A, Air conditioning, Air conditioning: List and location of components).
Check the correct operation of the cooling fan assembly or passenger compartment fan assembly and
condenser:
–check the electrical supply of the fan using parameters ET007 High speed fan assembly control, AC009 Low
speed fan assembly and AC010 High speed fan assembly (see Conformity check, Sub-function: Cold
loop).
Check the quantity of refrigerant (see MR 370 Mechanical, 62A, Air conditioning, Air conditioning: Parts and
consumables for the repair).
If the quantity of refrigerant is:
- Greater than the manufacturer's information, recharge according to the manufacturer's values (see MR 370
Mechanical, 62A, Air conditioning: Draining - Filling).
- Less than the manufacturer's information, check for leaks (see MR 370 Mechanical, 62A, Air conditioning,
Refrigerant circuit: Check).
If the fault is still present, replace the compressor (see MR 370, Mechanical, 62A, Air conditioning,
Compressor: Removal - Refitting).
AFTER REPAIRPerform a complete check using the diagnostic tool.
CLIM X84 1.1
Edition 2