check engine RENAULT SCENIC 2008 J84 / 2.G Engine Compartment Connection Unit Repair Manual

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses87G
87G-70V7 MR-372-J84-87G050$550.mif
UPC
Vdiag No.: 48, 4C
ET062
UCH REQUEST TO INJECTION COMPUTER OR PROTECTION
AND SWITCHING UNIT
NOTESSpecial notes:
There must be no present or stored faults.
This status gives information about the type of request made by the UCH to the injection computer or Protection
and Switching Unit.
ET062:
ENGINE STOP: when an engine stop is requested.
INACTIVE: no action on the vehicle.
+ AFTER IGNITION FEED: pressing the start button for more than 5 seconds.
STARTING: when starting is requested.
If the status does not correspond to the user's current request, refer to the interpretation of ET110 REQUEST
FROM UCH TO INJECTION OR UPC of the UCH (see MR 87B, Interpretation of statuses).
AFTER REPAIRRepeat the conformity check from the start.
USM_V48_ET062 /USM_V4C_ET062

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

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of parameters87G
87G-73V7 MR-372-J84-87G050$660.mif
UPC
Vdiag No.: 48, 4C
PR008
BATTERY VOLTAGE AFTER REST
NOTESSpecial notes:
This value can only be interpreted after the engine and electrical consumers have been
stopped for at least 8 hours.
Apply if the Charge battery message is displayed on the instrument panel.
Recharge the battery (see Technical Note 6512A, Charging).
Check the battery (see 80A, Battery).
AFTER REPAIRRepeat the conformity check from the start.
USM_V48_PR008 /USM_V4C_PR008

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of parameters87G
87G-74V7 MR-372-J84-87G050$660.mif
UPC
Vdiag No.: 48, 4C
PR010
ALTERNATOR CHARGE
NOTESIf fault DF007 UPC-alternator connection is declared present, deal with this fault first.
Start the engine and let it idle for 5 minutes.
Check that the fan units are not running.
Without any electrical consumers switched on, check the value of PR010 Alternator charge.
PR010 decreases and is < 50 % after a few minutes.
"YES"
No interfering consumer is disturbing vehicle operation.
–Switch on the electric heated rear screen and the main beam headlights.
–Wait 20 seconds and then check that PR010 Alternator charge has increased but
remains less than 90%.
If PR010 Alternator charge remains stuck at 99.6%, replace the alternator (see MR 364
or MR 370 Mechanical, 16A, Starting - Charging, Alternator: Removal - Refitting).
PR010 remains > 50% after 20 minutes.
–See 16A, Starting - Charging, Alternator output.
"NO"
AFTER REPAIRRepeat the conformity check from the start.
USM_V48_PR010 /USM_V4C_PR010

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands87G
87G - 76V7 MR-372-J84-87G050$770.mif
UPC
Vdiag No.: 48, 4C ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands
AC001
MAIN BEAM HEADLIGHTS
NOTESSpecial notes:
Check the condition and connections of fuses 6 (10A) and 7 (10A) on the Protection
and Switching Unit. Replace them if necessary.
Check the condition and connections of the bulbs. Replace them if necessary.
Use Wiring Diagrams Technical Note for Mégane II or Scénic II.
Check the condition and connection of the headlights, component codes 226 and 227 (tabs bent, broken or
oxidised).
If the connectors are 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 connector.
Check for earth, connection code MAS for the headlights, component codes 226 and 227.
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 for + 12 V on headlight connection codes RPD and RPG whilst running the command.
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.
Check the condition and connection of the Protection and Switching Unit 8-track AN connector, connection
code 1337 (tabs broken, bent or oxidised).
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.
Check the insulation, continuity and the absence of interference resistance on the following connections:
–RPD, between components 1337 and 226,
–RPG between components 1337 and 227.
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 Techline.
AFTER REPAIRRepeat the conformity check from the start.
MR-372-J84-87G050$770.mif

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands87G
87G - 77V7 MR-372-J84-87G050$770.mif
UPC
Vdiag No.: 48, 4C
AC002
DIPPED HEADLIGHTS
NOTESSpecial notes:
Check the condition and connections of fuses 3 (10A) and 4 (10A) on the Protection
and Switching Unit. Replace them if necessary.
Check the condition and connections of the bulbs. Replace them if necessary.
Use Wiring Diagrams Technical Note for Mégane II or Scénic II.
Check the condition and connection of the headlights, component codes 226 and 227 (tabs bent, broken or
oxidised).
If the connectors are 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 connector.
Check for earth, connection code MAS for the headlights, component codes 226 and 227.
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 for + 12 V on headlight connection codes CPD and CPG whilst running the command.
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 condition and connection of the Protection and Switching Unit 8-track AN connector, connection
code 1337 (tabs broken, bent or oxidised).
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.
Check the insulation, continuity and the absence of interference resistance on the following connections:
–CPD, between components 1337 and 226,
–CPG between components 1337 and 227.
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 Techline.
AFTER REPAIRRepeat the conformity check from the start.

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands87G
87G - 78V7 MR-372-J84-87G050$770.mif
UPC
Vdiag No.: 48, 4C
AC003
SIDE LIGHTS
NOTESSpecial notes:
Check the condition and connections of fuses 1 (7.5A) and 2 (7.5A) on the Protection
and Switching Unit. Replace them if necessary.
Check the condition and connections of the bulbs. Replace them if necessary.
Use Wiring Diagrams Technical Note for Mégane II or Scénic II.
Check the condition and connection of the headlights, component codes 226 and 227 (tabs bent, broken or
oxidised).
If the connectors are 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 connector.
Check for earth, connection code MAS for the headlights, component codes 226 and 227.
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 for + 12 V on side light connection codes LPD and LPG whilst running the command.
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 condition and connection of the Protection and Switching Unit 8-track AN connector, connection
code 1337 (tabs broken, bent or oxidised).
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.
Check the insulation, continuity and the absence of interference resistance on the following connections:
–LPD, between components 1337 and 226,
–LPG, between components 1337 and 227.
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 Techline.
AFTER REPAIRRepeat the conformity check from the start.

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands87G
87G - 79V7 MR-372-J84-87G050$770.mif
UPC
Vdiag No.: 48, 4C
AC004
FRONT FOG LIGHTS
NOTESSpecial notes:
Use this command only for vehicles fitted with front fog lights.
Check the condition and connection of fuse 5 (20A) on the Protection and Switching
Unit. Replace it if necessary.
Check the condition and connection of the bulbs. Replace them if necessary.
Use Wiring Diagrams Technical Note for Mégane II or Scénic II.
Check the condition and connection of the fog lights, component codes 176 and 177 (tabs bent, broken or
oxidised).
If the connectors are 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 connector.
Check for earth connection code MAS on the headlights, component codes 176 and 177.
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 for + 12 V on connection codes 8E and 8F for the fog lights whilst running the command.
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 condition and connection of the Protection and Switching Unit 8-track AN connector, connection
code 1337 (tabs broken, bent or oxidised).
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.
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 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 Techline.
AFTER REPAIRRepeat the conformity check from the start.

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands87G
87G - 80V7 MR-372-J84-87G050$770.mif
UPC
Vdiag No.: 48, 4C
AC005
WINDSCREEN WIPER LOW SPEED
NOTESSpecial notes:
Check the condition and connection of fuse 9 (25A) on the Protection and Switching
Unit. Replace it if necessary.
Check that status ET002 Front wiper protection remains INACTIVE.
Use Wiring Diagrams Technical Note for Mégane II or Scénic II.
Check the condition and connection of the wiper motor component code 212 (tabs broken, bent or oxidised).
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.
Check for earth connection code MAS on the wiper motor component code 212.
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 for + 12 V on connection code 14K on the wiper motor whilst running the command.
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 condition and connection of the Protection and Switching Unit CN connector, connection code 1337
(tabs broken, bent or oxidised).
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.
Check the insulation, continuity and the absence of interference resistance on the following connection:
–14K, between components 1337 and 212.
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 the fault is still present, contact Techline.
AFTER REPAIRRepeat the conformity check from the start.

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands87G
87G - 81V7 MR-372-J84-87G050$770.mif
UPC
Vdiag No.: 48, 4C
AC006
WINDSCREEN WIPER HIGH SPEED
NOTESSpecial notes:
Check the condition and connection of fuse 9 (25A) on the Protection and Switching
Unit. Replace it if necessary.
Make sure that status ET002 Windscreen wiper protection remains INACTIVE.
Use Wiring Diagrams Technical Note for Mégane II or Scénic II.
Check the condition and connection of the wiper motor component code 212 (tabs broken, bent or oxidised).
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.
Check for earth connection code MAS on the wiper motor component code 212.
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 for + 12 V on connection code 14L on the wiper motor whilst running the command.
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 condition and connection of the Protection and Switching Unit CN connector, connection code 1337
(tabs broken, bent or oxidised).
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.
Check the insulation, continuity and the absence of interference resistance on the following connection:
–14L, between components 1337 and 212.
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 the fault is still present, contact Techline.
AFTER REPAIRRepeat the conformity check from the start.