cooling 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-59V7 MR-372-J84-87G050$440.mif
UPC
Vdiag No.: 48, 4C
FUNCTION: AIR CONDITIONING
SUB-FUNCTION: COLD LOOP
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
Compressor
controlAC008:Compressor
controlYou should be able to hear
the compressor clutch
(stops the motor running).In the event of a fault, apply the
procedure for dealing with
command AC008.
Fan assemblyAC009:Low-speed fan
assemblyThis command is used to
activate the fan assembly
at low speed.In the event of a fault, apply the
procedure for dealing with
command AC009.
AC010:High-speed fan
assemblyThis command is used to
activate the engine cooling
fan at high speed.In the event of a fault, apply the
procedure for dealing with
command AC010.
Low-speed
engine fan
assembly relay
controlET014:Low-speed
engine fan
assembly relay
controlINACTIVE
ACTIVEIn the event of a fault, consult
the interpretation for status
ET014.
High-speed
engine fan
assembly relay
controlET013:High-speed
engine fan
assembly relay
controlINACTIVE
ACTIVEIn the event of a fault, consult
the interpretation for status
ET013.

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 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.