2008 RENAULT SCENIC air condition

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -149
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -149V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
*RCH = Passenger Compartment Heating ResistorET019
NUMBER OF PASSENGER COMPARTMENT HEATING
RESISTORS AUTHORISED BY THE INJECTION
NOTESThere must be no present or stored faults.
Special note:
Calculation performed by the UCH depending on the maximum power authorised by
the injection computer.
This information allows the number of passenger compartment heating resistors to be
supplied depending on the engine load.
The status, depending on the conditions, will be 0, 1, 2, 3, 4 or 5.
In the event of a fault, run fault finding on the injection system (see 13B, Diesel injection or 17B, Petrol injection).
Conditions for authorisation of passenger compartment heating resistor by the injection:
–the injection system status ET111 Fixed number of RCH* should be NO,
–the injection system status ET112 RCH* cut-off should be NO.
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_ET019/UCH_V48_ET019/ UCH_V4C_ET019/
UCH_V4D_ET019 /UCH_V4F_ET019/UCH_V50_ET019

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -150
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -150V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
*RCH = Passenger Compartment Heating ResistorET020
NUMBER OF RCH* CONTROLLED
NOTESThere must be no present or stored faults.
The maximum number of passenger compartment heating resistors controlled will be
the minimum number indicated by statuses ET017, ET018, ET019.
Special note:
The UCH controls the passenger compartment heating resistor relays according to the
authorisation from the injection computers and Protection and Switching Unit.
The status, depending on the conditions, will be 0, 1, 2, 3, or 4.
The passenger compartment heating resistor control conditions are:
–Heater motor running.
–Battery voltage > 12 V.
–Interior temperature < 10˚C.
–User temperature setpoint in warm position (> 20˚C).
–PR002 External temperature < 5˚C.
–ET015 Passenger compartment fan ACTIVE.
–ET018 Number of RCHs authorised by alternator > 0.
–ET019 Number of RCH* authorised by injection computer > 0.
–PR010 (UPC) Alternator charge < 70%.
If all the conditions are satisfied, and depending on the air conditioning function program, the UCH controls the
Passenger Compartment Heating Resistors needed to provide the service.
Check that these statuses and parameters are working properly.
In the event of a fault, refer to the interpretation of these statuses and parameters.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_ET020/UCH_V48_ET020/ UCH_V4C_ET020/
UCH_V4D_ET020 /UCH_V4F_ET020/UCH_V50_ET020

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 -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 -161
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -161V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET042
PASSENGER DOOR
NOTESThere must be no faults present.
Use Wiring Diagrams Technical Note for MEGANE II or SCENIC II.
Check the condition and connection of the PE1 connector of the UCH (tabs bent, broken, oxidised 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 passenger's side door lock connector (bent, broken, oxidised 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 insulation and continuity of the following connection:
●Connection code 87G between components 645 and 141.
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 continuity between connections 87G and MAN of component 141 (in the rest position).
The insulation between connections 87G and MAN of component 141 (in the engaged position).
Replace the lock if it is not correct.
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_ET042/UCH_V48_ET042/ UCH_V4C_ET042/
UCH_V4D_ET042 /UCH_V4F_ET042/UCH_V50_ET042