Page 25 of 56
87G - 25
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87G
V6 MR-372-J84-87G000$528_eng.mif
UPC
Vdiag No.: 44
LIGHTING: Lighting power
NOTESOnly check conformity after a complete check using the diagnostic tool.
Condition for carrying out the operation: the engine must be running.
Order FunctionParameter or Status
checked or Action Display and notes Fault finding
1LightingAC003:Side lightsThe front and rear side
lights and the number
plate lights as well as
the controls and
switches inside the
passenger
compartment must
light up.
Refer to the relevant fault
finding procedure in the
event of a fault.
AC002:Dipped beam
headlightsThe dipped beam
headlights must come
on.
AC001:Main beam
headlightsThe main beam
headlights must come
on.
AC004:Front fog lightsThe front fog lights
must come on.
Page 26 of 56
87G - 26
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Status and parameter summary table87G
V6 MR-372-J84-87G000$594_eng.mif
UPC
Vdiag No.: 44ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Status and parameter summary table
Tool status Diagnostic tool title
ET001 BATTERY WARNING LIGHT
ET002 WINDSCREEN WIPER PROTECTION
ET004 REVERSE GEAR ENGAGED
ET005 MANUAL GEARBOX GEAR LEVER POSITION
ET010 START CONDITIONS SATISFIED
ET013 HIGH SPEED FAN ASSEMBLY RELAY CONTROL
ET026 + AFTER IGNITION FEED
ET027 OIL PRESSURE CONTACT
Tool parameter Diagnostic tool title
PR010 ALTERNATOR
MR-372-J84-87G000$594_eng.mif
Page 27 of 56
87G - 27
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87G
V6 MR-372-J84-87G000$660_eng.mif
UPC
Vdiag No.: 44ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
ET001
BATTERY WARNING LIGHT
NOTESCheck that the status is OUT with the engine running and LIT with the engine stopped
and the ignition on.
Check consistency with the instrument panel warning light.
With the engine running, check that the battery voltage is much higher than +12 V.
Perform a fault finding procedure on the charge circuit if necessary.
Check the status and the connection of connector PEM on the UPC and of the connections on the alternator.
Repair if necessary.
Turn off the ignition and ensure that there is insulation against +12 V and continuity in the connection:
UPC connector PEM track 8 Track 1 of the alternator 2-track connector
Repair if necessary.
With the ignition on, ensure that there is insulation against earth and the continuity in the connection:
UPC connector PEM track 8 Track 1 of the alternator 2-track connector
Repair if necessary.
AFTER REPAIRDeal with any other possible faults.
Switch off the ignition and carry out a road test followed by a test with the diagnostic
tool.
MR-372-J84-87G000$660_eng.mif
Page 28 of 56
87G - 28
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87G
V6 MR-372-J84-87G000$660_eng.mif
UPC
Vdiag No.: 44
ET002
WINDSCREEN WIPER PROTECTION
NOTESBefore starting, check the operation of the windscreen wiper motor by running
commands AC005 Windscreen wiper at low speed and AC006 Windscreen wiper
at high speedand then check the park position using command AC012 Windscreen
wiper park position.
These statuses are listed in the order of severity or persistance of incorrect wiper
operation.
–if the status is INACTIVE, the wiper function is normal.
–If the status is LOW SPEED, the UPC has detected an abnormal wiper operation on
the higher speed setting for more than 6 seconds (the wiper has stuck or is blocked);
windscreen wiping is therefore forced to operate on the lower speed setting when
the higher speed setting is requested,
–If the status is INTERMITTENT, the wiper function is stopped for 10 seconds
following the detection and persistence of the fault (restrained or blocked),
–If the status is BLOCKED, wiping stops 30 seconds after the malfunction has lasted
for more than 2 minutes.
The status returns to INACTIVE, once the UCH requests a new wiping instruction (by
following the movement of the wiper stalk or by request from the rain sensor).
Make sure that nothing is mechanically blocking movement of the wiper blades (blades stuck, condition and
assembly of the wiper mechanism linkage and no object interfering with the motion of the device).
Check that the wiper mechanism is not seized.
Repair if necessary.
Check the status and the connection of connectors PPH2 and PEH on the UPC and of the windscreen wiper
motor.
Repair if necessary.
Page 29 of 56
87G - 29
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87G
V6 MR-372-J84-87G000$660_eng.mif
UPC
Vdiag No.: 44
ET002
(continued)
Check the insulation against earth and the continuity of the connections:
UPC connector PEH track 6 Track 2 of the windscreen wiper motor connector
UPC PPH2 connector track 1 Track 5 of the windscreen wiper motor connector
UPC connector PPH2 track 2 Track 4 of the windscreen wiper motor connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRDeal with any other possible faults.
Switch off the ignition and carry out a road test followed by a test with the diagnostic
tool.
Page 30 of 56
87G - 30
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87G
V6 MR-372-J84-87G000$660_eng.mif
UPC
Vdiag No.: 44
Manual gearbox ET004
REVERSE GEAR ENGAGED
NOTESCheck, and if necessary, replace fuse 5C on the UPC.
Check the status and the connection of the reverse gear switch connector and connector PPM2 on the UPC.
Repair if necessary.
With the ignition on and reverse gear selected, check the presence of +12 V on track 9 of connector PPM2.
If there is a fault, check the insulation against earth and continuity of the connections:
UPC connector PPM2 track 9 Track 1 (track 3 on the ND0 gearbox) of the switch
UPC connector PPM2 track 6 Track 2 (track 1 on gearbox ND0) of the switch
Repair if necessary.
With reverse gear selected, check the continuity between tracks 1 and 2 (or tracks 1 and 3 on gearbox NDO)
of the switch.
Replace the reverse gear switch if necessary.
If the fault is still present, contact the Techline.
Page 31 of 56
87G - 31
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87G
V6 MR-372-J84-87G000$660_eng.mif
UPC
Vdiag No.: 44
AUTOMATIC GEARBOX ET004
(continued)
Check the status and the connection of the multifunction switch connector and connector PPM2 on the UPC.
Repair if necessary.
With the ignition on and reverse gear selected, check the presence of +12 V on track 9 of connector PPM2.
If there is a fault, check the insulation against earth and the continuity of the connections:
UPC connector PPM2 track 9 Track 1 of the multifunction switch
UPC connector PPM2 track 6 Track 2 of the multifunction switch
Repair if necessary.
With reverse gear engaged, check the continuity of tracks 1 and 2 of the switch.
Replace the multifunction switch if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRDeal with any other possible faults.
Switch off the ignition and carry out a road test followed by a test with the diagnostic
tool.
Page 32 of 56
87G - 32
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87G
V6 MR-372-J84-87G000$660_eng.mif
UPC
Vdiag No.: 44
ET005
POSITION OF GEAR LEVER IN MANUAL GEARBOX
NOTESCheck, and if necessary, replace fuse "5C" on the UPC.
Applicable on vehicles fitted with a manual gearbox only.
Check the status and the connection of the neutral switch connector and connectors PPM2 and PEM on the
UPC.
Repair if necessary.
With the ignition on and in neutral, check the presence of +12 V on track 6 of connector PEM. If there is a fault,
check the insulation against earth and the continuity of the connection between the switch and track 6 of
connector PEM on the UPC.
Check the operation of the switch:
There is continuity between tracks 1 and 2 of the switch when the gearbox is in neutral.
There is an open circuit between tracks 1 and 2 of the switch when a gear is selected.
If faulty, replace the switch.
With the ignition on, check the presence of +12 V on track 2 (track 1 on gearbox ND0) of the neutral switch
connector.
If there is a fault, check the insulation against earth and the continuity of the connection between the switch
and track 6 of connector PPM2 on the UPC.
If the fault is still present, contact the Techline.
AFTER REPAIRDeal with any other possible faults.
Switch off the ignition and carry out a road test followed by a test with the diagnostic
tool.
