2008 RENAULT SCENIC light

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 - Command summary table87G
87G - 75V7 MR-372-J84-87G050$715.mif
UPC
Vdiag No.: 48, 4CENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Command summary table
Tool command Diagnostic tool title
AC001Main beam headlights
AC002Dipped headlights
AC003Side lights
AC004Front fog lights
AC005Low-speed windscreen wiper
AC006High-speed windscreen wiper
AC008Compressor control
AC009Low-speed fan assembly
AC010High-speed fan assembly
AC011Rear screen de-icer
AC013Headlight washers relay
AC014Alternator regulation
AC016Test electrical supply circuits
MR-372-J84-87G050$715.mif

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 - 86V7 MR-372-J84-87G050$770.mif
UPC
Vdiag No.: 48, 4C
AC013
HEADLIGHT WASHER RELAY
NOTESSpecial notes:
Check the condition and connection of fuse 21 (15A) on the Protection and
Switching Unit. Replace it if necessary.
The headlight washer pump operates if the dipped headlights are lit and the
windscreen washer switch is pressed and held.
Use Wiring Diagrams Technical Note for Mégane II or Scénic II.
Check the condition and connection of the headlight washer pump component code 219 (tabs bent, broken 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 condition and connection of the Protection and Switching Unit connector (tabs bent, broken, 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.
To check that the pump is working properly, supply the pump's tracks directly in one direction and then the other.
If the pump does not rotate, replace it.
Check for + 12 V alternately on connection code 39C of the headlight washer pump connector.
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:
–39A, between components 1337 and 219,
–39C, between components 1337 and 219.
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 - 87V7 MR-372-J84-87G050$770.mif
UPC
Vdiag No.: 48, 4C
AC014
ALTERNATOR REGULATION
NOTESConditions for the application of the command:
–engine running at idling speed and warm engine,
–air conditioning off,
–check that the passenger compartment blower unit is not operating.
–check that the cooling fan assemblies are not operating,
–if fault DF007 UPC-alternator connection is declared present, deal with this fault
first,
–check the conformity of PR010 Alternator charge (see Interpretation of
parameters).
Effect of command:
–for 30 seconds, the Protection and Switching Unit sets the alternator a regulation
voltage of 15 V ± 0.5,
–then for another 30 seconds, the Protection and Switching Unit imposes a
regulation voltage of 13 V ± 0.5 on the alternator.
Switch off all the electrical consumers (fans, main beam headlights, etc.).
Measure the voltage across the alternator terminals, between the B+ terminal and the alternator chassis earth.
Run AC014 Alternator regulation.
Wait 20 seconds,
For 10 seconds the alternator voltage should be 15 V ± 0.5.
Wait 20 seconds,
For 10 seconds the alternator voltage should be 13 V ± 0.5.
Switch on the heated rear screen and the main beam headlights.
Run AC014 again.
Wait 20 seconds,
For 10 seconds the alternator voltage should be 15 V ± 0.5.
Wait 20 seconds,
For 10 seconds the alternator voltage should be 13 V ± 0.5.
If the values obtained are not correct, replace the alternator (see MR 364 or MR 370 Mechanical, 16A, Starting-
Charging, Alternator: Removal - Refitting).
AFTER REPAIRRepeat the conformity check from the start.