lock RENAULT SCENIC 2010 J95 / 3.G Engine Compartment Connection Unit Workshop Manual

87G - 5
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Introduction
87G
V6 MR-372-J84-87G000$066_eng.mif
UPC
Vdiag No.: 44
Wiring check:
Fault finding problems:
Disconnecting the connectors and/or manipulating the wiring harness may temporarily remove the cause of a fault.
Electrical measurements of voltage, resistance and insulation are generally correct, especially if the fault is not
present when the analysis is made (stored fault).
Visual inspection:
Look for damage under the bonnet and in the passenger compartment.
Carefully check the protective parts, insulators and wiring harness routing.
Look for signs of oxidation.
Tactile inspection:
While manipulating the wiring harness, use the diagnostic tool to note any change in fault status from stored to
present.
Make sure that the connectors are properly tightened,
Apply light pressure to the connectors,
Twist the wiring harness.
If there is a change in status, try to locate the source of the fault.
Inspection of each component:
Disconnect the connectors and check the appearance of the clips and tabs, as well as their crimping (no crimping on
the insulating section).
Make sure that the clips and tabs are properly locked in the sockets.
Check that no clips or tabs have been dislodged during connection.
Check the clip contact pressure using an appropriate model of tab.
Resistance check:
Check the continuity of entire lines, then section by section.
Look for a short circuit to earth, the +12 V feed or with another wire.
If a fault is detected, repair or replace the wiring harness.

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.

87G - 46
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands
87G
V6 MR-372-J84-87G000$792_eng.mif
UPC
Vdiag No.: 44
AC009
LOW-SPEED FAN UNIT
NOTESCheck:
–the condition and connection of fuse 11.
Replace it if necessary.
The fans must have stopped.
Make sure nothing is mechanically blocking the blade rotation.
Check the condition and connection of the fan connector.
Repair if necessary.
Ensure that there is a good earth connection on track 2 of the fan.
Check that the resistor in the fan unit (if it exists) is not in open circuit with a resistance equal to 0.69 ΩΩ Ω Ω
± 20%.
If not correct, replace it.
Check that there is a +12 V supply on the fan while controlled by command AC009.
If everything is correct, replace the fan.
If there is a problem, check the insulation against earth and continuity of the connections:
UPC connector PPM1 track 4 Track 1 of the fan
OR
UPC connector PPM1 track 4 Resistor in the fan unit (if it exists)
Resistance in the fan unit (if it exists) Track 1 of the fan
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.

87G - 56
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Fault Finding Chart (ALP)
87G
V6 MR-372-J84-87G000$924_eng.mif
UPC
Vdiag No.: 44
ALP 3 Various passenger compartment functions do not light up
NOTESThe side lights must not be faulty, if they are, refer to the interpretation of command
AC003 Side lights.
Check the condition and connection of the faulty function(s).
Repair if necessary.
Check for the presence of earth on the defective function(s).
Repair if necessary.
With the side lights on, check for the presence of a +12 V supply on the defective function or functions.
If it is in order, replace the defective component.
Check the insulation against earth and continuity between the defective function and the UPC:
Cigar lighters, air conditioning control panel, radio,
multifunction display, rear view mirror controls, front
and rear window riser commands and window riser
locking, door locking switch, instrument panel
command and in-situ control of headlights command.Track 6 of connector PPH2 on the UPC
Heated seat switches, rigid roof switches, petrol or
LPG selector switch, electronic stability program
switch, simultaneous window control, automatic
gearbox display and speed limiter / cruise control
commands.Track 7 connector PPH2 of the UPC
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.