relay RENAULT SCENIC 2008 J84 / 2.G Passenger Comparment Connection Unit User Guide

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -128
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -128V9 MR-372-J84-87B000$387.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
FUNCTION: AIR CONDITIONING
Sub-function: Heating (continued)
*RCH = Passenger Compartment Heating Resistor
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application condition: engine stopped, + after ignition feed present.
Sub-
functionParameter or
Status
checked Action Display and Notes Fault finding
HeatingET020:Number RCH*
activated.0, 1, 2, 3, 4 or 5In the event of a fault,
refer to the
interpretation of status
ET020.
ET021:RCH* 1 relay control ACTIVE
INACTIVE In the event of a fault,
consult the
interpretation of
status ET021.
ET022:RCH* 2 relay controlACTIVE
INACTIVE In the event of a fault,
consult the
interpretation of
status ET022.
ET023:RCH* 3 relay controlACTIVE
INACTIVEIn the event of a fault,
consult the
interpretation of
status ET023.
ET031:Fast idle speed
request for RCH*INACTIVE
Fast idle speed to prevent
battery dischargeIn the event of a fault,
consult the
interpretation of status
ET031.
ET169:EngineSTOPPEDIn the event of a fault,
refer to the
interpretation of
status ET169.
ET025:Retractable roofCLOSED
NOT CLOSED
ABSENTIn the event of a fault,
consult the
interpretation of status
ET025.
ET026:Heated rear screen
switchACTIVE
INACTIVEIn the event of a fault,
consult the status
interpretation ET026.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Status summary table
87B
87B -139
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Status summary table
87B
87B -139V9 MR-372-J84-87B000$430.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Status summary table
*RCH = Passenger Compartment Heating ResistorTool status Diagnostic tool title Vdiag
ET008UCH blankV44, V48, V4C,
V4D, V4F, V50
ET010Card frequency (in MHz)V44, V48, V4C,
V4D
ET014Control power level
V44, V48, V4C,
V4D, V4F, V50 ET015Passenger compartment fan
ET016Buzzer activation request
ET017Number of RCH* required
ET018Number of RCH* authorised by alternator
ET019Number of RCH* authorised by injection computer
ET020Number RCH* activated.
ET021RCH* 1 relay control
ET022RCH* 2 relay control
ET023RCH* 3 relay control
ET025Retractable roof V48, V4C, V4D,
V4F, V50
ET026Heated rear screen switch
V44, V48, V4C,
V4D, V4F, V50 ET028Heated rear screen button
ET029Air conditioning button
ET030Air conditioning request 2
ET031Fast idle speed request for RCH*
ET032Front left-hand wheel valve signal
ET033Front right-hand wheel valve signal
ET034Rear right-hand wheel valve signal
ET035Rear left-hand wheel valve signal
ET038Service warning light on request
ET039STOP warning light on request
ET040Tyre pressure monitoring system
MR-372-J84-87B000$430.mif

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 -166
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -166V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET047
BRAKE PEDAL POSITION
NOTESThe accessories relay must operate.
During pedal travel, it is possible to obtain an undetermined or inconsistent status for
status ET047 if the brake pedal is left in an "indeterminate zone", with the brake pedal
switch in between the released position and the depressed position (see System
operation).
This treatment applies only in cases in which the status is inconsistent or
undetermined, with full load on the accelerator or completely released from the brake
pedal.
Special note:
Switch on forced after ignition.
Use Wiring Diagrams Technical Note for MEGANE II or SCENIC II.
ET047 Inconsistency with the pedal depressed.
Check the condition and connection of the brake pedal switch connector.
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.
Remove the brake pedal switch and check the insulation between connections BPT and 5A of component 160
(switch piston free).
Only replace the brake pedal switch if it is not correct.
Check the condition and connection of the UCH connector PE2.
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.
With the UCH and brake pedal switch disconnected:
Check the insulation from + 12 V of the following connection:
●Connection code 5A, between components 645 and 160.
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.
The line is shared with the injection computer and the automatic transmission computer (if the vehicle is fitted with
an automatic transmission). In the event of faulty insulation, use a wiring diagram to check the connections
between the brake pedal switch connector and these computers.
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_ET047/UCH_V48_ET047/ UCH_V4C_ET047/
UCH_V4D_ET047 /UCH_V4F_ET047/UCH_V50_ET047

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -168
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -168V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET047
CONTINUED 2
ET047 Inconsistency without depressing the pedal.
Check the condition and connection of the brake pedal switch connector.
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.
With the brake pedal switch disconnected:
Check the insulation between connections 65A and SP17 of component 160 (brake light switch piston pressed).
Only replace the brake pedal switch if it is not correct.
Check the condition and connection of the UCH connector PE2.
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.
With the UCH and brake pedal switch disconnected:
Check the insulation in relation to + 12 V of connection 5A between components 645 and 160.
The line is shared with the ABS computer or the electronic stability program (ESP) relay (depending on equipment)
and the brake lights.
In the event of faulty insulation, use a wiring diagram to check the connections between the brake pedal switch
connector and these components.
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.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -169
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -169V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET047
CONTINUED 3
ET047 Undetermined with the pedal depressed.
Check the condition and connection of the brake pedal switch connector.
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.
With the brake pedal switch disconnected:
Check for + 12 V on component 160 on connection SP17.
If not correct:
–Check the condition and connection of fuse 1H in the passenger compartment relay and fuse box.
–Check the condition and the connection of the passenger compartment fuse and relay box connector. 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 connection SP17 between components 160 and 260. 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.
If it is still faulty, contact Techline.
With the brake pedal switch disconnected:
Check the continuity of the following connections:
●Connection code 65A,
●Connection code SP17 of component 160 (brake pedal switch piston free).
Only replace the brake pedal switch if it is not correct.
Check the condition and connection of the UCH connector PE2.
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.
With the UCH and brake pedal switch disconnected:
Check the insulation and continuity of the following connection:
●Connection code 65A between components 645 and 160.
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.
The line is shared with the ABS computer or the ESP relay (depending on equipment) and the brake lights. In the
event of faulty insulation, it is therefore necessary, using a wiring diagram, to check the connections between the
brake pedal switch connector and these components.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses87B
87B - 211
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses87B
87B - 211V9 MR-372-J84-87B000$559.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET085
HAZARD WARNING LIGHTS BUTTON
NOTESNo faults should be present or stored.
Use Wiring Diagrams Technical Note for MEGANE II or SCENIC II.
ET085 is Absent with button pressed.
Check the F16 15A fuse of the passenger compartment fuse and relay box on the left-hand side of the centre
console.
Replace it if necessary.
Check the door/warning switch connector (e.g.: connector properly connected, tabs bent, broken, oxidised).
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the connector; otherwise, replace the wiring.
Check the PE2 and PE1 connectors (e.g. connector properly connected, tabs bent, broken, oxidised).
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the connector; otherwise, replace the wiring.
Check for + 12 V on connection LPG of component 1391.
If the connector is faulty and if there is a repair procedure (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 connections:
●Connection code 64F.
●Connection code 64Q between components 645 and 1391.
If the connection or connections are 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 following connections on component 1391 (button pressed):
●Connection code 64F.
●Connection code 64Q.
If there is insulation, replace the button.
If there is continuity, contact the techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_ET085/UCH_V48_ET085/ UCH_V4C_ET085/
UCH_V4D_ET085 /UCH_V4F_ET085/UCH_V50_ET085

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Command summary table87B
87B - 246
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Command summary table87B
87B - 246V9 MR-372-J84-87B000$731.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Command summary table
*RCH: Passenger Compartment Heating Resistor
*CPE: Electric central door locking
*SR.: SunroofTool command Diagnostic tool title Vdiag
AC003Immobiliser warning light
V44, V48,
V4C, V4D,
V4F, V50 AC004Central door locking
AC005Central door unlocking
AC006Driver's door unlocking
AC007Rear screen wiper
AC008Front fog lights
AC009Rear fog lights
AC015Air conditioning button indicator light
AC016RCH* 1 relay
AC017RCH* 2 relay
AC018RCH* 3 relay
AC019Heated rear screen indicator light
AC020CPE* button indicator light
AC021Interior lights
AC022Left-hand direction indicator
AC023Right-hand direction indicator
AC024Card reader lighting
AC025One-touch window control/SR.* authorisation
AC026Start button lighting
AC027Footwell lights
AC030Headlight washer relay 1 (only if Vdiag 44 UPC)
AC031Headlight washer relay 2 (only if Vdiag 44 UPC)
AC032Driver's side external aerial testing
AC033Passenger's side external aerial testing
AC034Boot external aerial test
AC036Internal aerial test
AC037Transmitter aerial fault finding
AC076Child safety lock indicator light
MR-372-J84-87B000$731.mif

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands87B
87B - 249
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands87B
87B - 249V9 MR-372-J84-87B000$774.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
AC004
LOCK DOORS AND BOOT
NOTESNo faults should be present or stored.
This command is for testing locking relay operation.
Note:
The driver's door circuit is shared with the fuel tank flap circuit.
Use Wiring Diagrams Technical Note for MEGANE II or SCENIC II.
One or more doors do not lock when the command is activated.
Check the condition and connection of the PP2 connector on the UCH.
If the connector is faulty and if there is a repair procedure (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 connector on the faulty lock(s).
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the connector; otherwise, replace the wiring.
Check for earth on the following connections:
●Connection code MAM.
●Connection code 87H of component 140.
●Connection code MZ.
●Connection code 87A of component 139.
●Connection code MAN.
●Connection code 87G of component 141.
●Connection code MAQ.
●Connection code 87B of component 138.
●Connection code 20BC.
●Connection code 20BH of component 844.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If faulty: If OK:
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.