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V3 MR-372-J84-62B000$080.mif
Vdiag No.: 44
PR092
BATTERY VOLTAGE
NOTESNone.
This parameter specifies the supply voltage of the climate control computer.
This parameter should indicate a voltage equal to: 10.5 < X < 14.4 V.
If the voltage is not within the specified range, disconnect connector A (12-track) of the climate control
computer to check the insulation, continuity and absence of interference resistance of the connections:
Computer connector A track 10 + accessories feed (7.5 A fuse in the Protection and
Switching Unit)
Computer connector A track 11 + before ignition feed (20 A fuse of the UCH)
Computer connector A track 6 Earth (left-hand dashboard beam)
Repair if necessary.
If the connections are correct but the fault still persists, perform fault finding on the charging circuit.
AFTER REPAIRRepeat the conformity check from the start.
ACREG X84 1.1
Edition 2
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Vdiag No.: 44
PR121
BLOWN AIR TEMPERATURE SETTING
NOTESNone.
This parameter is used to control the temperature inside the passenger compartment. This setting is calculated
by the climate control computer according to interior temperature, exterior temperature and coolant
temperature.
This setting is used to control the mixing motor and the request to operate the passenger compartment air
heating resistors (to reach the temperature requested by the user as quickly as possible in order to optimise
passenger compartment comfort quickly).
The following conditions must be satisfied to allow the UCH to control the passenger compartment air heating
resistors:
–Engine running,
–Passenger compartment blower running (minimum speed 1),
–User temperature setting above 20 ˚C (or automatic mode requested),
–Blown air temperature setting above 65 ˚C,
–Interior temperature below 10 ˚C,
–Exterior temperature below 5 ˚C,
–Engine coolant temperature below 65 ˚C,
–Injection authorisation (ET019 Number of RCHs authorised by injection system < at 1),
–Alternator authorisation (ET018 Number of RCHs authorised by alternator < at 1).
Note:
–Statuses ET017, ET018 and ET019 are indicated by the UCH (see conformity check of air conditioning
function: Section 62A).
–The values given below are average values. The UCH calculates the number of passenger compartment
heating resistors to trigger (ET017 number of RCH required).
AFTER REPAIRRepeat the conformity check from the start.
ACREG X84 1.1
Edition 2
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CLIMATE CONTROL
Fault finding – Conformity check62B
V3 MR-372-J84-62B000$090.mif
Vdiag No.: 44
CLIMATE CONTROL
Fault finding – Conformity check
PASSENGER COMPARTMENT VENTILATION SUB-FUNCTION
NOTESOnly carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: engine off, ignition on (forced 12 V After ignition).
Air conditioning off
(air conditioning compressor not triggered).
Special note:
The various conformity checks
for the air conditioning function are explained in the
Introduction section.
Note:
–Read the parameters when the vehicle is cold (in the morning) to check the
conformity of the temperature parameters (without thermometer). The two
temperatures should be practically the same (as should the coolant temperature
given by the injection system).
–The invalid values given in this check correspond to the value sent by the diagnostic
tool (substitute value) when the sensor in question is faulty. A sensor fault can be
detected when these invalid values are displayed (this is an important point for
sensors on which fault finding cannot be performed, e.g. exterior temperature
sensor).
Order FunctionParameter or Status
checked or Action Display and Notes Fault finding
1TemperaturesPR001:Interior
temperatureX = interior
temperature ± 5 ˚C
(invalid value: 87.5 ˚C)If there is a fault, refer to the
fault finding procedure
for this parameter.
PR002:Exterior
temperatureX = exterior
temperature ± 5 ˚C
(invalid value: 215 ˚C)
Note: This status is
reset by the climate
control computer but
its source is the UCH.In the event of a fault, refer
to the interpretation of this
parameter (see
Section 87B).
2Solar radiationPR006:Solar radiationfrom 0 W
(no solar radiation) to
400 W
(maximum solar
radiation)
(invalid value:
765 W)In the event of a fault, see
the interpretation of this
parameter.
ACREG X84 1.1
Edition 2
MR-372-J84-62B000$090.mif
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Fault finding – Conformity check62B
V3 MR-372-J84-62B000$090.mif
Vdiag No.: 44
PASSENGER COMPARTMENT VENTILATION SUB-FUNCTION (CONTINUED)
Order FunctionParameter or Status
checked or Action Display and Notes Fault finding
3Passenger
compartment
blowerPR019:Passenger
compartment
blower PWM
settingSpeed 0 = 0%
Speed 8 = 100%
Note: The PWM signal
is a modulated control
voltage used to control
the heating/ventilation
fan power module for
the passenger
compartment.If there is a fault or for more
information (to find the
intermediate speed
percentages), refer to the
fault finding procedure
for this parameter.
Note: If the parameter
varies correctly but the
passenger compartment
blower does not work: refer
to ALP 5.
ET141:Passenger
compartment
blowerRUNNING or
STOPPED depending
on user requestIf there is a fault, refer to the
fault finding procedure
for this status.
4Air flapsPR012:Mixing flap
position0% = Max. cold
position (15 ˚C)
100% = Max. hot
position (27 ˚C)If there is a fault, refer to the
fault finding procedure
for this parameter.
ET062:Recirculation
flap positionOPEN if the flap is in
the exterior air position
CLOSED if the flap is
in the recirculation
positionIn the event of a fault, refer
to the interpretation of
this status.
PR011:Distribution flap
positionfrom 0% to 100%.
Note:
0% = Air vents only
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.
ACREG X84 1.1
Edition 2
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Fault finding – Conformity check62B
V3 MR-372-J84-62B000$090.mif
Vdiag No.: 44
COLD LOOP SUB-FUNCTION
NOTESOnly carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: engine off, ignition on (forced 12 V After ignition).
Air conditioning off (air conditioning compressor not triggered).
Special note:
The various conformity checks
for the air conditioning function are explained in the
Introduction section.
Order FunctionParameter or Status
checked or Action Display and Notes Fault finding
1Request to
engage the
compressorET143:Air conditioning
request 1ACTIVE for air
conditioning request
(AC button pressed or
AUTO button pressed
with maximum cold
request).
INACTIVE the
opposite.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
switch on the compressor
(refer to the flowchart in the
system operation section).
2TemperaturePR001:Interior
temperatureX = interior
temperature ± 5 ˚C
(invalid value: 87.5 ˚C)If there is a fault, refer to the
fault finding procedure
for this parameter.
3Passenger
compartment
blowerET141:Passenger
compartment
blowerRUNNING
or
STORED
depending on user
requestIf there is a fault, refer to the
fault finding procedure
for this status.
4Air flapPR012:Mixing flap
position0% = Max cold
position (15 ˚C)
100% = Max hot
position (27 ˚C)If there is a fault, refer to the
fault finding procedure
for this parameter.
5Solar radiationPR006:Solar radiationfrom 0 W (no sunlight)
to 400 W (maximum
sunlight).
(invalid value: 765 W)If there is a fault, refer to the
fault finding procedure
for this parameter.
ACREG X84 1.1
Edition 2
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Fault finding – Conformity check62B
V3 MR-372-J84-62B000$090.mif
Vdiag No.: 44
USER SELECTION SUB-FUNCTION
NOTESOnly carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: engine off, ignition on (forced 12 V After ignition).
Air conditioning off (air conditioning compressor not triggered).
Special note:
The various conformity checks
for the air conditioning function are explained in the
Introduction section.
Order FunctionParameter or Status
checked or Action Display and Notes Fault finding
1Heated rear
screenET086:Heated rear
screen: manual
modeACTIVE: De-icing
button at the bottom of
the control panel
pressed.
INACTIVE: the
opposite.If there is a fault, refer to the
fault finding procedure
for this status.
ET085:Heated rear
screen:
automatic modeACTIVE: De-icing
button at the top of the
control panel pressed
(See Clear function).
INACTIVE: the
opposite.If there is a fault, refer to the
fault finding procedure
for this status.
2Request to
engage the
compressorET143:Air conditioning
request 1ACTIVE for air
conditioning request
(AC button pressed or
AUTO button pressed
with maximum cold
request).
INACTIVE the
opposite.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
switch on the compressor
(refer to the flowchart in the
system operation section).
ACREG X84 1.1
Edition 2
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CLIMATE CONTROL
Fault finding – Conformity check62B
V3 MR-372-J84-62B000$090.mif
Vdiag No.: 44
HEATING SUB-FUNCTION
NOTESOnly carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: engine off, ignition on (forced 12 V After ignition).
Air conditioning off (air conditioning compressor not triggered).
Special note:
The various conformity checks
for the air conditioning function are explained in the
Introduction section.
Order FunctionParameter or Status
checked or Action Display and Notes Fault finding
1Mixing motorPR012:Mixing flap
position0% = Max cold position
(15 ˚C)
100% = Max hot
position (27 ˚C)If there is a fault, refer to the
fault finding procedure
for this parameter.
2Heated rear
screenET086:Heated rear
screen: manual
modeACTIVE: De-icing
button at the bottom of
the control panel
pressed.
INACTIVE the
opposite.In the event of a fault, refer
to the interpretation of
this status.
ET085:Heated rear
screen:
automatic modeACTIVE: De-icing
button at the top of the
control panel pressed
(Clear view function).
INACTIVE the
opposite.If there is a fault, refer to the
fault finding procedure
for this status.
3Passenger
compartment
blowerPR001:Interior
temperatureX = interior
temperature ± 5 ˚C
(invalid value: 87.5 ˚C).If there is a fault, refer to the
fault finding procedure
for this parameter.
PR121:Blown air
temperature
setting0 < X < 80 ˚CIf there is a fault, refer to the
fault finding procedure
for this parameter.
4TemperatureET141:Passenger
compartment
blowerRUNNING
or
STORED
depending on user
requestIf there is a fault, refer to the
fault finding procedure
for this status.
ACREG X84 1.1
Edition 2
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V3 MR-372-J84-62B000$090.mif
Vdiag No.: 44
MAIN SCREEN
NOTESOnly carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: engine off, ignition on (forced 12 V After ignition).
Air conditioning off (air conditioning compressor not triggered).
Special note:
The various conformity checks for the air conditioning function are explained in the
Introduction section.
Note:
This page lists the statuses and parameters provided by the climate control computer
but which are not associated with the four sub-functions given in the conformity check
(PASSENGER COMPARTMENT VENTILATION, COLD LOOP, USER SELECTION
and HEATING sub-functions).
Order FunctionParameter or Status
checked or Action Display and Notes Fault finding
1Electrical
suppliesPR092:Battery voltage10.5 < X < 14.4 VIn the event of a fault, see
the interpretation of this
parameter
ET007:+ after ignition
computer feedABSENT: Ignition off.
PRESENT: Ignition on.In the event of a fault, refer
to the interpretation of
this status.
ET002:+ 12 V side
lightsABSENT: Side lights
off.
PRESENT: Side lights
on.In the event of a fault,
consult the interpretation
of this status (see 87B,
Passenger compartment
connection unit).
PR122:Night-time
lighting level6% = minimum lighting
level.
99% = maximum
lighting level.
(side lights off: 102%)In the event of a fault, refer
to the interpretation of
parameter PR111 Lighting
dimmer voltage (see 83A,
Instrument panel).
ACREG X84 1.1
Edition 2
