Page 16 of 56
87G - 16
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87G
V6 MR-372-J84-87G000$528_eng.mif
UPC
Vdiag No.: 44ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
MAIN SCREEN
NOTESOnly check conformity after a complete check using the diagnostic tool.
Test conditions: Engine stopped, ignition on.
Order FunctionParameter or Status
checked or Action Display and notes Fault finding
1Charging circuitET001:Battery warning
lightLIT
In the event of a fault, refer to
the relevant fault finding
method. 2Oil pressure
contactET027:Oil pressure
contactCLOSED
3GearboxET004:Reverse gear
engagedYES
NO
MR-372-J84-87G000$528_eng.mif
Page 17 of 56
87G - 17
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87G
V6 MR-372-J84-87G000$528_eng.mif
UPC
Vdiag No.: 44
KEYLESS VEHICLE: Starting the engine
NOTESOnly check conformity after a complete check using the diagnostic tool.
Test conditions: Engine stopped, ignition on.
Order FunctionParameter or Status
checked or Action Display and notes Fault finding
1GearboxET004:Reverse gear
engagedYES
NO
In the event of a fault, refer to
the relevant fault finding
procedure. ET005:Manual gearbox
leverNEUTRAL
OUT OF NEUTRAL
NOT SUPPORTED, if
the vehicle is fitted with
an automatic gearbox
2StartingET010:Conditions for
engine start
satisfied.YES, if the conditions
for engine start have all
been satisfied and
after pressing the start
button
NO, if the engine start
conditions have not all
been satisfied or if the
engine start button has
not been pressed
Page 21 of 56
87G - 21
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87G
V6 MR-372-J84-87G000$528_eng.mif
UPC
Vdiag No.: 44
MAIN SCREEN
NOTESOnly check conformity after a complete check using the diagnostic tool.
Condition for carrying out this operation: the engine must be running.
Order FunctionParameter or Status
checked or Action Display and notes Fault finding
1Charging circuitET001:Battery warning
lightOFF
Refer to the relevant fault
finding procedure in the
event of a fault. 2Oil pressure
contactET027:Oil pressure
contactOPEN
3GearboxET004:Reverse gear
engagedYES
NO
Page 22 of 56
87G - 22
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87G
V6 MR-372-J84-87G000$528_eng.mif
UPC
Vdiag No.: 44
KEYLESS VEHICLES: Starting the engine
NOTESOnly check conformity after a complete check using the diagnostic tool.
Condition for carrying out this operation: the engine must be running.
Order FunctionParameter or Status
checked or Action Display and Notes Fault finding
1GearboxET004:Reverse gear
engagedYES
NO
Refer to the relevant fault
finding procedure in the
event of a fault. ET005:Manual gearbox
leverNEUTRAL
OUT OF NEUTRAL
NOT SUPPORTED, if
the vehicle is fitted with
an automatic gearbox
2StartingET010:Conditions for
starting the
engine satisfied.YES, if the conditions
for starting the engine
have been met and
after a press on the
engine start button
NO, if the conditions
for starting the engine
have not been met or if
the engine start button
has not been pressed
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 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.