check engine light RENAULT SCENIC 2008 J84 / 2.G Engine Compartment Connection Unit User Guide

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults87G
87G-34V7 MR-372-J84-87G050$330.mif
UPC
Vdiag No.: 48, 4C
DF018
PRESENT
OR
STOREDLEFT-HAND MAIN BEAM HEADLIGHT CIRCUIT
CO: Open circuit
CC.0: Short circuit to earth
CO
NOTESSpecial note:
To display this fault as present or stored, run the command
AC016 Electrical supply circuit test.
Use Wiring Diagrams Technical Note for Mégane II or
Scénic II.
Check that the left-hand main beam headlight bulb is sound.
Repair if necessary.
Check the condition and connection of the connector for the left-hand headlight, component code 227
(tabs bent, broken, oxidised).
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the connector.
Check that the earth, component code MAS for the left-hand headlight connector, component code 227 is
perfect.
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 the 8-track connector AN for the Protection and Switching Unit,
component code 1337 (tabs bent, broken, oxidised).
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the connector.
Check the insulation, continuity and the absence of interference resistance on the following connection:
–RPG between components 1337 and 227.
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 fitting and switch on the left-hand headlight.
Repair if necessary or replace the light if it is faulty.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 "Electrical supply circuits test".
Erase the faults from the computer memory, switch the + after ignition supply off and
back on again and run another check using the diagnostic tool.
USM_V48_DF018/USM_V4C_DF018

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults87G
87G-36V7 MR-372-J84-87G050$330.mif
UPC
Vdiag No.: 48, 4C
DF019
PRESENT
OR
STOREDRIGHT-HAND MAIN BEAM HEADLIGHT CIRCUIT
CO: Open circuit
CC.0: Short circuit to earth
CO
NOTESSpecial note:
To display this fault as present or stored, run the command
AC016 Electrical supply circuit test.
Use Wiring Diagrams Technical Note for Mégane II or
Scénic II.
Check that the right-hand main beam headlight bulb is sound.
Repair if necessary.
Check the condition and connection of the connector for the right-hand headlight, component code 226
(tabs bent, broken, oxidised).
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the connector.
Check that the earth on connection code MAS for the right-hand headlight, component code 226 is perfect.
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 the 8-track connector AN for the Protection and Switching Unit,
component code 1337 (tabs bent, broken, oxidised).
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the connector.
Check the insulation, continuity and the absence of interference resistance on the following connection:
–RPD between components 1337 and 226.
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 fitting and switch on the right-hand headlight.
Repair if necessary or replace the light if it is faulty.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 "Electrical supply circuits test".
Erase the faults from the computer memory, switch the + after ignition supply off and
back on again and run another check using the diagnostic tool.
USM_V48_DF019/USM_V4C_DF019

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults87G
87G-38V7 MR-372-J84-87G050$330.mif
UPC
Vdiag No.: 48, 4C
DF020
PRESENT
OR
STOREDFRONT FOG LIGHT CIRCUIT
CO: Open circuit
CC.0: Short circuit to earth
CO
NOTESSpecial note:
To display this fault as present or stored, run the command
AC016 Electrical supply circuit test.
Use Wiring Diagrams Technical Note for Mégane II or
Scénic II.
Check that the front fog light bulbs are sound.
Repair if necessary.
Check the condition and connection of the 2-track connectors for the front fog lights, component code 176 and
177 (tabs broken, bent or oxidised).
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the connector.
Check that the earth on connection code MAS for the front right-hand fog light, component code 176 is perfect.
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 that the earth on connection code MAS for the front left-hand fog light, component code 177 is perfect.
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 the 8-track connector AN for the Protection and Switching Unit,
component code 1337 (tabs bent, broken, oxidised).
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the connector.
Check the insulation, continuity and the absence of interference resistance on the following connections:
–8E between components 1337 and 177,
–8F between components 1337 and 176.
If the connection or connections are faulty and if there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check the fitting and switch for the front fog lights.
Repair if necessary or replace the light(s) if faulty.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 "Electrical supply circuits test".
Erase the faults from the computer memory, switch the + after ignition supply off and
back on again and run another check using the diagnostic tool.
USM_V48_DF020/USM_V4C_DF020

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults87G
87G-40V7 MR-372-J84-87G050$330.mif
UPC
Vdiag No.: 48, 4C
DF021
PRESENT
OR
STOREDREVERSING LIGHT(S) CIRCUIT
CO: Open circuit
CC.0: Short circuit to earth
CC.0
NOTESSpecial note:
To display this fault as present or stored, run the command
AC016 Electrical supply circuit test.
Use Wiring Diagrams Technical Note for Mégane II or
Scénic II.
Check the conformity of the fuse F19 (10A) for the Protection and Switching Unit.
Check the insulation, continuity and the absence of interference resistance on the following connections:
–H66P between components 1337 and 173,
–H66P between components 1337 and 172.
If the connection or connections are faulty and if there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 "Electrical supply circuits test".
Erase the faults from the computer memory, switch the + after ignition supply off and
back on again and run another check using the diagnostic tool.
USM_V48_DF021/USM_V4C_DF021

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults87G
87G - 50V7 MR-372-J84-87G050$385.mif
UPC
Vdiag No.: 48, 4C
DF031
PRESENT
OR
STOREDHEADLIGHT WASHER SUPPLY CIRCUIT
CC.0 : Short circuit to earth
CC.0
NOTESSpecial note:
To display this fault as present or stored, run command
AC016 Electrical supply circuits test.
Use Wiring Diagrams Technical Note for Mégane II or
Scénic II.
Check that the UPC fuse F21 (15A) is correct.
Check the insulation, continuity and the absence of interference resistance on the following connections:
–39A, between components 1337 and 219,
–39C, between components 1337 and 219.
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 fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Electrical supply circuits test.
Clear the computer fault memory, switch the + after ignition supply off and back on, and
run another check with the diagnostic tool.
USM_V48_DF031/USM_V4C_DF031

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check87G
87G-60V7 MR-372-J84-87G050$440.mif
UPC
Vdiag No.: 48, 4C
FUNCTION: WIPING
SUB-FUNCTION: WIPER POWER
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine stopped, + after ignition feed on.
FunctionParameter or Status
Check or ActionDisplay and Notes Fault finding
WiperAC005:Low-speed
windscreen wiperThis command is used to
activate the windscreen
wiper motor at low
speed.In the event of a fault, apply the
procedure for dealing with
commands AC005 and AC006.
AC006:High-speed
windscreen wiperThis command is used to
activate the windscreen
wiper motor at high
speed.
Windscreen
wiper protectionET002:Windscreen
wiper protectionINACTIVEIn the event of a fault, refer to the
interpretation for status ET002.
Windscreen
wiper park
positionET018:Windscreen
wiper park
positionPRESENT (if the wiper
is not active)
ABSENTIn the event of a fault, refer to the
interpretation of status ET018.
Headlight
washerAC013:Headlight washer
relayThis command is used to
activate the headlight
washers relay on the
right and left-hand side
alternately.In the event of a fault, apply the
procedure for dealing with
command AC013.

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check87G
87G-61V7 MR-372-J84-87G050$440.mif
UPC
Vdiag No.: 48, 4C
FUNCTION: LIGHTING
SUB-FUNCTION: LIGHTING POWER
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine stopped, + after ignition feed on.
FunctionParameter or Status
Check or ActionDisplay and Notes Fault finding
Side lightsAC003:Side lightsThis command
switches on the side
lights.In the event of a fault, apply the
procedure for dealing with
command AC003.
Dipped
headlightsAC002:Dipped
headlightsThis command
switches on the dipped
beam headlights.In the event of a fault, apply the
procedure for dealing with
command AC002.
Main beam
headlightsAC001:Main beam
headlightsThis command
switches on the main
beam headlights.In the event of a fault, apply the
procedure for dealing with
command AC001.
Front fog lightsAC004:Front fog lightsThis command
switches on the front
fog lights.In the event of a fault, apply the
procedure for dealing with
command AC004.

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses87G
87G-66V7 MR-372-J84-87G050$550.mif
UPC
Vdiag No.: 48, 4C
ET004
REVERSE GEAR ENGAGED
NOTESSpecial notes:
Only apply the checks with the ignition switched on and when no faults are present.
Use Wiring Diagrams Technical Note for Mégane II or Scénic II.
5- and 6-speed manual gearbox
Check the condition and connection of the connector of the reverse gear switch, component code 155, the
manual gearbox neutral/reversing lights sensor, component code 1109, and UPC connector MN,
component code 1337.
If the connector is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the connector.
With the ignition on and reverse gear engaged, check for + 12 V on connection codes H66P and AP11 of
Protection and Switching Unit connector MN, component code 1337.
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 insulation, continuity and the absence of interference resistance on the following connections:
–AP11 between components 1337 and 1109,
–H66P between components 1337 and 1109.
Reverse gear engaged:
–between AP11 and H66P on component 155.
If the 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 fault is still present, contact the Techline.
AFTER REPAIRRepeat the conformity check from the start.
USM_V48_ET004 /USM_V4C_ET004

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses87G
87G-69V7 MR-372-J84-87G050$550.mif
UPC
Vdiag No.: 48, 4C
ET023
ALTERNATOR THERMAL FAULT
NOTESSpecial notes:
Apply the checks if the status is PRESENT with the engine running.
Switch off the engine.
Check the general condition of the alternator:
Make sure that there are no foreign bodies that could impair the alternator cooling.
Clean the alternator if necessary.
With the engine stopped, let the alternator cool down with the bonnet open for at least 1 hour.
Start the engine with the bonnet closed.
Switch on the main beam headlights and the electrical heated rear screen.
If the status becomes PRESENT again, replace the alternator (see MR 364 or MR 370 Mechanical, 16A,
Starting - Charging, Alternator: Removal - Refitting).
AFTER REPAIRRepeat the conformity check from the start.
USM_V48_ET023 /USM_V4C_ET023

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of parameters87G
87G-72V7 MR-372-J84-87G050$660.mif
UPC
Vdiag No.: 48, 4CENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of parameters
PR004
BATTERY VOLTAGE
NOTESSpecial notes:
Check that all of the electrical consumers are switched off:
–Passenger compartment blower unit stopped.
–Radio off (and Radio navigation system if fitted to the vehicle).
–Interior lights off.
If fault DF013 Voltage regulation is not present (or stored):
With the engine stopped and no electrical consumers operating for 5 minutes.
Check the battery, see TEST3 Battery status test.
If fault DF013 Voltage regulation is present:
With the engine running at idle speed, and electrical consumers activated:
–Dipped headlights and side lights.
–Electric heated rear screen.
–Passenger compartment blower unit in maximum position.
Check the consistency between the battery voltage measurement from the multimeter and the value of PR004
Battery voltage.
If the difference is greater than 1 V check the conformity of the Protection and Switching Unit supply circuit and
the charging circuit wiring TEST2 Wiring test.
Repair if necessary, otherwise replace the Protection and Switching Unit (see Replacement of components).
AFTER REPAIRRepeat the conformity check from the start.
USM_V48_PR004 /USM_V4C_PR004
MR-372-J84-87G050$660.mif