stop start RENAULT SCENIC 2008 J84 / 2.G Engine Compartment Connection Unit Workshop Manual

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults87G
87G-24V7 MR-372-J84-87G050$330.mif
UPC
Vdiag No.: 48, 4C
DF012
PRESENT
OR
STOREDALTERNATOR
1.DEF: Alternator mechanical or electrical fault
NOTESConditions for applying the fault finding procedure to present faults:
The fault is declared present after the engine has been running for at least 1 minute.
Special note:
The fault illuminates the Battery and STOP warning lights on the instrument panel.
Use Wiring Diagrams Technical Note for Mégane II or Scénic II.
1.DEF
NOTESNone.
Check the fitting, condition and tension of the accessories drive belt.
Visually check that the alternator is not clogged.
Clean out the alternator cooling vents using an air gun.
Check the wiring, the connections and the earths (see Test no. 1 Wiring test).
If the connection is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring otherwise replace the wiring.
Run command AC014 Alternator regulation (see Interpretation of commands).
With the bonnet closed, start the engine.
Leave the engine to run for 2 minutes at idle speed.
If the fault is still present, replace the alternator (see MR 364 or MR 370 Mechanical, 16A, Starting - Charging,
Alternator: Removal - Refitting).
AFTER REPAIRErase the faults from the computer memory, switch the + after ignition supply off and
back on again and run another check using the diagnostic tool.
USM_V48_DF012/USM_V4C_DF012

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check87G
87G-56V7 MR-372-J84-87G050$440.mif
UPC
Vdiag No.: 48, 4CENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
MAIN SCREEN
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine stopped, + after ignition feed on.
FunctionParameter or Status
Check or ActionDisplay and Notes Fault finding
Battery voltagePR004:Battery voltage11 V < X < 13.5 V
(engine running:
X < 15.8 V)If there is a fault, refer to the
interpretation of parameter PR004.
Reverse gearET004:Reverse gear
engagedYES
NOIn the event of a fault, refer to the
interpretation of status ET004.
Oil pressureET027:Oil pressure
contactOPEN
CLOSEDNone.
+ 12 V after
ignition feedET003:+ 12 V after
ignition feed relay
controlINACTIVE
ACTIVENone.
StartingET062:UCH request to
injection or
Protection and
Switching UnitENGINE OFF
INACTIVE
+ APC
STARTINGIn the event of a fault, consult the
interpretation of status ET062.
USM_V48_CCONF/ USM_V4C_CCONF
MR-372-J84-87G050$440.mif

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check87G
87G-57V7 MR-372-J84-87G050$440.mif
UPC
Vdiag No.: 48, 4C
KEYLESS VEHICLE
SUB-FUNCTION: STARTING
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine stopped, + after ignition feed on.
FunctionParameter or Status
Check or ActionDisplay and Notes Fault finding
Reverse gearET004:Reverse gear
engagedYES
NOIn the event of a fault, refer to the
interpretation of status ET004.
Manual gearbox
lever positionET005:Manual gearbox
lever positionNOT IN NEUTRAL
NEUTRALNormal statuses.
UNAVAILABLE
INVALIDIn the event of a fault, refer to the
interpretation of status ET004.
Starting
conditions metET010:Starting
conditions metSTATUS 1
STATUS 2
STATUS 3In the event of a fault, consult the
interpretation for status ET010.
YESNormal status.
+ 12 V after
ignition feed
relay controlET003:+ 12 V after
ignition feed relay
control INACTIVE
ACTIVEIn the event of a fault, consult the
interpretation of fault DF032.

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses87G
87G-69V7 MR-372-J84-87G050$550.mif
UPC
Vdiag No.: 48, 4C
ET023
ALTERNATOR THERMAL FAULT
NOTESSpecial notes:
Apply the checks if the status is PRESENT with the engine running.
Switch off the engine.
Check the general condition of the alternator:
Make sure that there are no foreign bodies that could impair the alternator cooling.
Clean the alternator if necessary.
With the engine stopped, let the alternator cool down with the bonnet open for at least 1 hour.
Start the engine with the bonnet closed.
Switch on the main beam headlights and the electrical heated rear screen.
If the status becomes PRESENT again, replace the alternator (see MR 364 or MR 370 Mechanical, 16A,
Starting - Charging, Alternator: Removal - Refitting).
AFTER REPAIRRepeat the conformity check from the start.
USM_V48_ET023 /USM_V4C_ET023

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