RENAULT SCENIC 2008 J84 / 2.G Passenger Comparment Connection Unit Workshop Manual

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -151
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -151V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
*RCH = Passenger Compartment Heating ResistorET021
ET022
ET023
RCH* 1 RELAY CONTROL
RCH* 2 RELAY CONTROL
RCH* 3 RELAY CONTROL
NOTESThere must be no present or stored faults.
For statuses ET021 and ET022, the signal can be interpreted if the vehicle is
configured with 1000 W Passenger Compartment Heating Resistors or 1800 W
Passenger Compartment Heating Resistors.
For status ET023, the signal is interpretable if the vehicle is configured with RCH
1800 W.
In the event of a fault, check the operation of statuses ET015 Passenger compartment fan, ET017 Number of
RCH* required, ET018 Number of RCH* authorised by alternator, ET019 Number of RCH* authorised by
injection and ET020 Number of RCH* controlled.
Carry out fault finding on commands AC016 RCH* relay 1, AC017 RCH* relay 2 and AC018 RCH* relay 3.
Check the parameters needed to switch on the Passenger Compartment Heating Resistors; exterior temperature,
interior temperature, temperature setpoint on the heater control panel, alternator load, battery voltage.
If all the requisite conditions are consistent and the status remains INACTIVE, contact Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_ET021/UCH_V48_ET021/ UCH_V4C_ET021/UCH_V4D_ET021/ UCH_V4F_ET021/UCH_V50_ET021/
UCH_V44_ET022/UCH_V48_ET022/ UCH_V4C_ET022/UCH_V4D_ET022/ UCH_V4F_ET022/UCH_V50_ET022/
UCH_V44_ET023/UCH_V48_ET023/ UCH_V4C_ET023/UCH_V4D_ET023/ UCH_V4F_ET023/UCH_V50_ET023

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -152
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -152V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET025
RETRACTABLE ROOF
NOTESThere must be no present or stored faults.
If the vehicle is a cabriolet, status ET025 is CLOSED or NOT CLOSED.
If the vehicle is not a cabriolet, status ET025 will be ABSENT.
ET025 is CLOSED
The retractable roof of the cabriolet vehicle is closed.
In case of inconsistency, contact the Techline.
ET025 is NOT CLOSED
The retractable roof of the vehicle is not closed.
In case of inconsistency, contact the Techline.
ET025 is ABSENT
The position of the retractable roof is unknown.
In case of inconsistency, contact the Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_ET025/UCH_V48_ET025/ UCH_V4C_ET025/
UCH_V4D_ET025 /UCH_V4F_ET025/UCH_V50_ET025

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -153V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET026
HEATED REAR SCREEN CONTROL
NOTESThere must be no present or stored faults.
Special note:
Operation of the heated rear screen requires the engine status to be Running.
ET026 Inactive despite a rear de-icing request by the user.
Air conditioning
Manual
Climate control
Verify that status ET142 Engine operating phase is Running; otherwise, carry out
fault finding on the injection system.
Check that status ET028 Heated rear screen switch is PRESSED, otherwise refer
to the interpretation of this status.
If the fault is still present, contact your Techline.
Verify that status ET142 Engine operating phase is Running; otherwise, carry out
fault finding on the injection system.
If the fault is still present, carry out a fault finding procedure on the air conditioning
computer.
If the fault is still present, contact your Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_ET026/UCH_V48_ET026/ UCH_V4C_ET026/
UCH_V4D_ET026 /UCH_V4F_ET026/UCH_V50_ET026

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -154
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -154V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET028
HEATED REAR SCREEN BUTTON
NOTESThere must be no present or stored faults.
Special note:
Information interpretable if the vehicle is configured with Heating or Manual Air
Conditioning (SC008 UCH type and CF019 Type of air conditioning).
Use Wiring Diagrams Technical Note for MEGANE II or SCENIC II.
ET028 Released with press on the button.
ET028 Pressed without press on the button.
Check the condition and connection of the air conditioning control panel connector (bent, broken tabs, etc.).
If the connector is faulty and if there is a repair method (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the connector; otherwise, replace the wiring.
Check the condition and connection of the UCH connector PE2 (tabs bent, broken).
If the connector is faulty and if there is a repair method (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the connector; otherwise, replace the wiring.
Check the insulation and continuity of the following connection:
●Connection code 15M between components 645 and 139.
If the connection is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check the control panel (see 62C, Manual air conditioning).
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_ET028/UCH_V48_ET028/ UCH_V4C_ET028/
UCH_V4D_ET028 /UCH_V4F_ET028/UCH_V50_ET028

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -155
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -155V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET029
AIR CONDITIONING BUTTON
NOTESThere must be no present or stored faults.
Special note:
Information interpretable if the vehicle is configured with Manual Air
Conditioning (SC008 UCH type and CF019 Type of air conditioning).
Use Wiring Diagrams Technical Note for MEGANE II or SCENIC II.
Check the condition and connection of the air conditioning control panel connector (bent, broken tabs, etc.).
If the connector is faulty and if there is a repair method (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the connector; otherwise, replace the wiring.
Check the condition and connection of the UCH connector PE2 (tabs bent, broken).
If the connector is faulty and if there is a repair method (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the connector; otherwise, replace the wiring.
Check the insulation and continuity of the following connection:
●Connection code 38AL between components 645 and 319.
If the connection is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check the control panel (see 62C, Manual air conditioning).
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_ET029/UCH_V48_ET029/ UCH_V4C_ET029/
UCH_V4D_ET029 /UCH_V4F_ET029/UCH_V50_ET029

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -156V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET030
AIR CONDITIONING REQUEST 2
NOTESThere must be no present or stored faults.
The engine must be running.
Special note:
This is the request for air conditioning sent by the UCH to the injection computer. This
request may reach the UCH in two ways:
–In the case of a vehicle fitted with manual air conditioning, by pressing on the air
conditioning button.
–In the case of a vehicle fitted with climate control, by request from the user or the
climate control computer in automatic mode.
ET030 Inactive despite a climate control request.
Air conditioning
Manual

Air conditioning
climate control
Verify that status ET169 Engine is Running. If status ET169 is not running, run fault
finding on the injection.
Check that status ET029 Air conditioning button is PRESSED by pressing the
button. If status ET029 is RELEASED carry out fault finding on this status.
Verify that status ET015 Passenger compartment ventilation is ACTIVE. If status
ET015 is INACTIVE carry out fault finding on this status.
If the fault is still present, contact the Techline.
Carry out fault finding on the climate control computer (see 62C, Manual air
conditioning).
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_ET030/UCH_V48_ET030/ UCH_V4C_ET030/
UCH_V4D_ET030 /UCH_V4F_ET030/UCH_V50_ET030

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -157
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -157V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
*RCH = Passenger Compartment Heating ResistorET031
FAST IDLE SPEED REQUEST FOR RCH
NOTESThere must be no present or stored faults.
ET031 Inactive with engine at idling speed with the passenger compartment heating resistors switched on.
In case of inconsistency, contact the Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_ET031/UCH_V48_ET031/ UCH_V4C_ET031/
UCH_V4D_ET031 /UCH_V4F_ET031/UCH_V50_ET031

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -158
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -158V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET032
ET033
ET034
ET035FRONT LEFT-HAND WHEEL VALVE SIGNAL
FRONT RIGHT-HAND WHEEL VALVE SIGNAL
REAR RIGHT-HAND WHEEL VALVE SIGNAL
REAR LEFT-HAND WHEEL VALVE SIGNAL
NOTESBefore carrying out any operation, apply the fault finding procedure (see Introduction).
Special note:
If a wheel is equipped with a tyre pressure sensor, precautions must be taken
when removing/refitting tyres.
Failure to take the precautions specified in Section 35 of Workshop Repair
Manual 364 (for Mégane II) or 370 (for Scénic II) could result in the sensor being
damaged, and potential operating faults in the tyre pressure monitoring system.
CORRECT:The sensor is operating correctly and the pressure is correct.
Absent:The UCH is not receiving the signal from the sensor.
Over-inflated:The sensor sends a "tyre over-inflated" signal.
Puncture:The sensor sends a "tyre severely under-inflated" signal (pressure - 0.6 bar) or a rapid pressure
loss signal.
Under-inflated:The sensor sends a "tyre under-inflated" signal.
STEP 1
Start by checking the tyre inflation and if necessary restore to the recommended pressure.
Next, to ensure that the wheel sensors are functioning properly, at each conformity check, make sure all sensors
really are transmitting. To do this, create a tyre leak and check that its status changes:
Initial status = over-inflated deflate Final status = Correct or puncture or under-inflated
Initial status = puncture or under-inflated inflate Final status = Correct or over-inflated
AFTER REPAIRDeal with any other possible faults.
Switch off the ignition and carry out a road test followed by a test with the diagnostic
tool.
UCH_V44_ET032/UCH_V48_ET032/UCH_V4C_ET032/UCH_V4D_ET032/UCH_V4F_ET032/UCH_V50_ET032/UCH_V44_ET033/
UCH_V48_ET033/UCH_V4C_ET033/UCH_V4D_ET033/UCH_V4F_ET033/UCH_V50_ET033/UCH_V44_ET034/UCH_V48_ET034/
UCH_V4C_ET034/UCH_V4D_ET034/UCH_V4F_ET034/UCH_V50_ET034/UCH_V44_ET035/UCH_V48_ET035/UCH_V4C_ET035/
UCH_V4D_ET035/UCH_V4F_ET035/UCH_V50_ET035

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -159
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -159V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET032
ET033
ET034
ET035
CONTINUED
STEP 2
IMPORTANT:
Wait 1 minute and 30 seconds before checking the change of status.
–If the original status is: over-inflated or under-inflated
Consult ALP 52 "Adjust tyre pressure" message appears (the wheel concerned is highlighted on the
display) and ALP 56 "Adjust tyre pressure" message appears (2 wheels are highlighted on the display).
–If the original status is: puncture
Consult ALP 56 "Stop! Tyre puncture" message appears (the wheel is highlighted on the display).
–If the original status is: absent
Consult ALP 54 "Tyre sensor fault" message appears (wheel warning light disappears) and ALP 55 "Tyre
sensor fault" message appears (4 wheel warning lights disappear).
If the status does not change, replace the sensor on the wheel concerned by following the instructions and the
programming procedure for the four valve codes, SC002 Program 4 valve codes (see Configurations and
programming).
AFTER REPAIRDeal with any other possible faults.
Switch off the ignition and carry out a road test followed by a test with the diagnostic
tool.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -160
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -160V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
In the event that status ET040 is inoperative:
RF*: Radio frequency.
ET040TYRE PRESSURE MONITOR SYSTEM
NOTESBefore carrying out any operation, apply the fault finding procedure (see Introduction).
Check that no fault is present.
ACTIVE: If the four wheel valves transmit their signal and if the signal is correctly received by the UCH.
INOPERATIVE: If a component is faulty or incorrectly configured.
Check the configuration reading to ensure that LC017 Tyre pressure monitor function is correctly entered in the
UCH. If this is not the case, start configuration in the "Programming" menu with configuration CF023 Tyre pressure
monitor function, under SC008 UCH type.
Check that there is no ABS fault.
Check status ET045 RF* frame received to make sure the receiver aerial is working properly by requesting central
door locking with the card.
If, after performing all these checks, no fault has been found and status ET040 is still Inoperative, contact the
Techline.
AFTER REPAIRDeal with any other possible faults.
Switch off the ignition and carry out a road test followed by a test with the diagnostic
tool.
UCH_V44_ET040/UCH_V48_ET040/UCH_V4C_ET040/UCH_V4D_ET040/UCH_V4F_ET040 / UCH_V50_ET040