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

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-38
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-38V9 MR-372-J84-87B000$129.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
3 WIPER FUNCTION
3.1 Sub-function: WIPER CONTROL
The UCH receives the driver's request when the wiper stalk is used.
Windscreen wiper:
The UCH requests the Protection and Switching Unit via the CAN network to supply power to the windscreen wiper.
The park position is managed by the Protection and Switching Unit.
The wiper control stalk has four positions (neutral, intermittent wiping, slow speed and fast speed) and a wiper
intermittent speed ring which varies the time between each wipe.
Special notes:
If the windscreen wiper is set to low speed when the vehicle is moving and then the vehicle stops, the system switches
to intermittent wipe.
The requests made to the UCH by the wiper stalk can be displayed using statuses: ET077 Wiper stalk position and
ET096 Wiper intermittent speed ring.
If the vehicle is fitted with a rain sensor, (see special features of the rain and light sensor).
Rear screen wiper:
Rear wiper speed and power supply are also controlled by the UCH.
Windscreen wiper outside neutral position:
–The rear screen wiper starts to operate as soon as reverse gear is engaged and rain drops are detected on the
windscreen wiper.
–When the vehicle is stationary, the wipers operate intermittently every 7 seconds; over 36 mph (60 km/h) they
operate every 3 seconds. There is no continuous wiping function, except during the rear screen washer control.
The statuses corresponding to operation of the rear screen wiper can be displayed using statuses ET080 Rear
screen wiper request, ET097 Rear screen wiper park position and ET109 Reverse gear engaged or ET108
Automatic gearbox lever position, by configuration reading LC064 Rear screen wiper and by configuration
CF166 Rear screen wiper.
Windscreen washers:
The front and rear windscreen washers are controlled directly by the wiper control stalk, via a wire connection.
These connections are doubled up to the UCH to permit command status reading.
ET078 Windscreen washer request,
ET079 Rear screen washer request.
Special features of headlight washers
For vehicles fitted with xenon bulbs, the headlight washers are actuated at the same time as the windscreen washer,
only if the headlights are on.
Two cases are possible concerning the control of the headlight washers.
First case: (vehicles fitted with a SIEMENS Vdiag 44 UPC): the UCH sends the command by cable to two headlight
washer relays on a relay plate underneath the UPC.
Second case: (vehicles fitted with a LEAR Vdiag 48 or later): the UCH requests the UPC via the multiplex network to
activate the washer relays.
WARNING
If the UCH does not manage to determine the position of the control stalk, or inform the Protection and Switching
Unit of the control stalk's position, the Protection and Switching Unit will activate the windscreen wiper at low speed
(defect mode).
MR-372-J84-87B000$129.mif

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-43
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-43V9 MR-372-J84-87B000$129.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
4FUNCTION: LIGHTING
4.1 Sub-function: LIGHTING CONTROL
The UCH receives the request from the driver, from the lighting stalk, from the hazard warning lights button and, if
fitted to the vehicle, from the light detector.
The UCH requests the Protection and Switching Unit, via the multiplex network, to provide power to the side lights,
dipped headlights, main beam headlights and fog lights (front).
If a request to activate the lighting is made, the UPC provides power to the xenon bulb computers.
The dipped headlights are still supplied when the main beam headlights are activated.
The following statuses can be displayed:
ET081 Lighting stalk position.
ET082 Rear fog lights request.
ET085 Hazard warning lights switch.
ET083 Left-hand direction indicator request.
ET084 Right-hand indicator request.
If the UCH cannot determine the position of the control stalk, or inform the Protection and Switching Unit of the
control stalk's position, the Protection and Switching Unit will activate the dipped headlights.
4.2 Sub-function: LIGHTING POWER
The UCH controls the power supply for the rear fog light (a single one), direction indicators and interior lighting (roof
lights and footwell/floor lights).
The interior lighting request can be displayed using the ET112 Interior lighting control status.
Operation of the lights powered by the UCH can be checked using the actuator commands AC009 Rear fog lights,
AC022 Left-hand direction indicator, AC023 Right-hand direction indicator, AC021 Interior lights and AC027
Footwell/floor lighting.
Information displays Rain and light sensor Multiplex network
Steering column
controlUCHProtection and Switching
Unit
Rear fog light
Direction indicators
Interior lighting
Side lightsMain beam
headlights
Dipped
headlightsFront fog lights

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
87B
87B-82
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
87B
87B-82V9 MR-372-J84-87B000$301.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
DF012
PRESENT
OR
STOREDRIGHT-HAND DIRECTION INDICATOR CIRCUIT
CO.0: Open circuit or short circuit to earth
1.DEF: Bulbs not working or open circuit
NOTESConditions for applying the fault finding procedure to a stored fault:
If the fault appears after action on the right-hand direction indicator control stalk, apply
this fault finding procedure.
Special note:
The fault becomes stored after changing a bulb.
Use Wiring Diagrams Technical Note for MEGANE II or SCENIC II.
Check the bulbs.
Replace them, if necessary.
Check the condition and connection of the right-hand headlight connectors of the right-hand indicator
repeater and the rear right-hand light.
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 for earth on components 226 and 267.
If the connection is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
Check for earth on connection MAQ of component 172.
If the connection is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
With the command running, check for + 12 V on connection 64D of components 226 and 267.
If the connection is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
Check the condition and connection of connector PP3 and connector PP1 on the UCH.
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 64D, between components 645 and 172.
If the connection is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
If correct, check the connection between the UCH and front and rear lights (see wiring diagram), check the bulbs
again and if still not correct, replace the rear lights(s).
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_DF012 /UCH_V48_DF012/UCH_V4C_DF012/
UCH_V4D_DF012/UCH_V4F_DF012/UCH_V50_DF012

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
87B
87B-83
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
87B
87B-83V9 MR-372-J84-87B000$301.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
DF013
PRESENT
OR
STOREDLEFT-HAND DIRECTION INDICATOR CIRCUIT
CO.0: Open circuit or short circuit to earth
1.DEF: Bulbs not working or open circuit
NOTESConditions for applying the fault finding procedure to a stored fault:
If the fault appears after action on the left-hand direction indicator control stalk, then
apply this fault finding procedure.
Special note:
The fault becomes stored after changing a bulb.
Use Wiring Diagrams Technical Note for MEGANE II or SCENIC II.
Check the bulbs.
Replace them, if necessary.
Check the condition and connection of the left-hand headlight connector, the left-hand repeater and the rear
left-hand light.
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 for earth on components 227 and 268.
If the connection is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
Check for earth on connection MZ of component 173.
If the connection is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
With the command running, check for + 12 V on connection 64C of components 227 and 268.
If the connection is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
Check the condition and connection of connector PP3 and connector PP2 on the UCH.
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 64C between components 645 and 173.
If the connection is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
If correct, check the connection between the UCH and front and rear lights (see wiring diagram), check the bulbs
again and if still not correct, replace the rear lights(s).
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_DF013 /UCH_V48_DF013/UCH_V4C_DF013/
UCH_V4D_DF013/UCH_V4F_DF013/UCH_V50_DF013

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands87B
87B - 267
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands87B
87B - 267V9 MR-372-J84-87B000$774.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
AC022
Left-hand direction indicator
NOTESNo faults should be present or stored.
This command is for testing direction indicator operation.
Apply after ignition feed.
Check the bulbs.
Use Wiring Diagrams Technical Note for MEGANE II or SCENIC II.
The direction indicators do not light when the command is activated.
Check the condition and connection of the connectors for the left-hand headlight, the left-hand repeater and the
rear left-hand light.
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 MAS.
Between component 227 and earth.
Between component 268 and earth.
●Connection code MZ between component 173 and earth.
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 for the + 12 V feed with the command running on the following connections:
●Connection code 64C.
Between component 227 and earth.
Between component 173 and earth.
●Connection code 64V between component 268 and earth.
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 the + 12 V feed is correct, check the bulbs again and if the bulbs still do not work, replace the rear light(s).
Check the condition and connection of the PP3 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.
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 commands87B
87B - 269
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands87B
87B - 269V9 MR-372-J84-87B000$774.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
AC023
RIGHT-HAND DIRECTION INDICATOR
NOTESNo faults should be present or stored.
This command is for testing direction indicator operation.
Apply after ignition feed.
Check the bulbs.
Use Wiring Diagrams Technical Note for MEGANE II or SCENIC II.
The direction indicators do not light when the command is activated.
Check the condition and connection of the connectors for the right-hand headlight, the right-hand repeater and the
rear right-hand light.
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 MAS.
Between component 226 and earth.
Between component 267 and earth.
●Connection code MAQ between component 172 and earth.
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 for the + 12 V feed with the command running on the following connections:
●Connection code 64D.
Between component 226 and earth.
Between component 172 and earth.
●Connection code 64U between component 267 and earth.
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 the + 12 V feed is correct, check the bulbs again and if the bulbs still do not work, replace the rear light(s).
Check the condition and connection of the PP3 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.
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 - Fault Finding Chart87B
87B - 304
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Fault Finding Chart87B
87B - 304V9 MR-372-J84-87B000$903.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ALP4 No left-hand direction indicator
NOTESOnly check this customer complaint after performing a complete check with the
diagnostic tool.
Check the bulbs.
Are the bulbs in good condition?
YES
Check the + 12 V supply and earth on the headlight
connectors (see interpretation of DF013 Left-hand
direction indicator circuit).
Is there a supply?
NO
Check status ET083 Left-hand direction indicator
request by moving the control stalk.
Is status ET083 present?
YES
Perform command AC022 Left-hand direction
indicator.
Does the left-hand direction indicator come on?
YES
Check the UCH connectors.
If the fault is still present, contact the Techline.
NOReplace the bulbs.
YESVerify that there is no corrosion on the
connector.
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.
NOApply interpretation of status ET083 Left-
hand direction indicator request.
NOApply interpretation of command AC022
Left-hand direction indicator.
AFTER REPAIRCarry out a complete check using the diagnostic tool.
UCH_V44_ALP4/UCH_V48_ALP4/ UCH_V4C_ALP4/
UCH_V4D_ALP4 /UCH_V4F_ALP4/UCH_V50_ALP4

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Fault Finding Chart87B
87B - 306
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Fault Finding Chart87B
87B - 306V9 MR-372-J84-87B000$903.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ALP6NO DIPPED HEADLIGHTS
(Lights without xenon bulb)
NOTESOnly check this customer complaint after performing a complete check with the
diagnostic tool.
Use Wiring Diagrams Technical Note for MEGANE II or SCENIC II.
Check the bulbs.
Are the bulbs in good condition?
YES
Check the + 12 V supply between connections RPG
and MAS of component 270.
Check the + 12 V supply between connections RPD
and MAS of component 270.
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.
Are the feeds correct?
NO
Check status ET081 Lighting stalk position.
Is the dipped beam headlight request on dipped
beam?
YES
Run fault finding on the Protection and Switching
Unit and check the dipped headlight F8C fuses
(Vdiag 44 UPC) and F3 and F4 fuses (Vdiag 48 or
above UPC) on the UPC.
NOReplace the bulbs.
YESVerify that there is no corrosion on the
connector.
Repair if necessary.
NOApply interpretation of status ET081
Lighting stalk position.
AFTER REPAIRCarry out a complete check using the diagnostic tool.
UCH_V44_ALP6/UCH_V48_ALP6/ UCH_V4C_ALP6/
UCH_V4D_ALP6 /UCH_V4F_ALP6/UCH_V50_ALP6

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Fault Finding Chart87B
87B - 307
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Fault Finding Chart87B
87B - 307V9 MR-372-J84-87B000$903.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ALP7No main beam headlights
(Lights without xenon bulb)
NOTESOnly check this customer complaint after performing a complete check with the
diagnostic tool.
Use Wiring Diagrams Technical Note for MEGANE II or SCENIC II.
Check the bulbs.
Are the bulbs in good condition?
YES
Check the + 12 V supply on connection RPD of
component 226 and on connection RPG of
component 227.
Check for earth on connection MAS of
components 226 and 227.
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.
Are the feeds correct?
NO
Check status ET081 Lighting stalk position.
Does the side light request occur on main beam?
YES
Run fault finding on the Protection and Switching
Unit.
Check the F8A and F8B fuses (Vdiag 44 UPC) and
F6 and F7 fuses (Vdiag 48 or above UPC).
NOReplace the bulbs.
YESVerify that there is no corrosion on the
connector.
Repair if necessary.
NOApply interpretation of status ET081
Lighting stalk position.
AFTER REPAIRCarry out a complete check using the diagnostic tool.
UCH_V44_ALP7/UCH_V48_ALP7/ UCH_V4C_ALP7/
UCH_V4D_ALP7 /UCH_V4F_ALP7/UCH_V50_ALP7