2008 RENAULT SCENIC alternator

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults87G
87G-20V7 MR-372-J84-87G050$330.mif
UPC
Vdiag No.: 48, 4C
DF007
CONTINUED 3
1.DEF
NOTESNone.
Check the connection and condition of the alternator connector, component code 103.
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the connector.
Check the connection and condition of connector MT1 for the Protection and Switching Unit, component code
1337.
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the connector.
With the engine running, switch on the electrical heated rear screen.
Measure the voltage between the earth of the alternator casing component code 103 and the battery earth
component code 107.
If the difference is over 1 V, check the vehicle earths.
If the fault is still present, contact the Techline.
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.

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults87G
87G-21V7 MR-372-J84-87G050$330.mif
UPC
Vdiag No.: 48, 4C
DF007
CONTINUED 4
CC
NOTESNone.
Check the connection and condition of the alternator connector, component code 103.
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the connector.
Check the connection and condition of connector MT1 for the Protection and Switching Unit, component code
1337.
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the connector.
Disconnect the UPC-Alternator connection for the alternator and the Protection and Switching Unit.
Ensure that the UPC-Alternator connection is insulated in relation to the + 12V supply and the earth:
–2N between components 1337 and 103.
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.
If the fault is still present, disconnect the connector from the Protection and Switching Unit.
In + after ignition feed, measure the voltage of the connector MT1 for the Protection and Switching Unit on
connection code 2N.
If the voltage is less than 3V or greater than 9V:
Replace the Protection and Switching Unit (see Replacement of components).
If the voltage is between 3V and 9V:
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.

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 - Interpretation of faults87G
87G-25V7 MR-372-J84-87G050$330.mif
UPC
Vdiag No.: 48, 4C
DF013
PRESENT
OR
STOREDVOLTAGE REGULATION
1.DEF: Voltage too low
2.DEF: Voltage too high
NOTESSpecial note:
Deal with the faults DF012 Alternator and DF007 UPC - alternator connection first
if they are present or stored.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present with the engine running.
Use Wiring Diagrams Technical Note for Mégane II or Scénic II.
Check the conformity of the wiring (see Test no. 2 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.
Check the conformity of the parameter PR004 Battery voltage (see Interpretation of parameters).
If the fault is still present, contact the Techline.
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_DF013/USM_V4C_DF013

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults87G
87G - 53V7 MR-372-J84-87G050$385.mif
UPC
Vdiag No.: 48, 4C
DF034
PRESENT
OR
STOREDALTERNATOR TYPE
1.DEF : Inconsistency
NOTESSpecial note:
After 10 minutes with the engine running, deal with fault DF007 UPC-alternator
connection first if it is present or stored.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present with the engine running.
Note the part number of the Protection and Switching Unit LC001, Configurations and programming.
Note the part number of the alternator (information found on the rear alternator face).
Contact the Techline.
AFTER REPAIRClear the computer fault memory, switch the + after ignition supply off and back on, and
run another check with the diagnostic tool.
USM_V48_DF034/USM_V4C_DF034

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check87G
87G-58V7 MR-372-J84-87G050$440.mif
UPC
Vdiag No.: 48, 4C
FUNCTION: AIR CONDITIONING
SUB-FUNCTION: HEATING
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
Alternator chargePR010:Alternator charge0 < X < 99.6%
With the engine running,
activate the heated rear
screen and check that the
value increases.In the event of a fault, consult
the interpretation of
parameter PR010.
Rear screen de-
icerAC011:Rear screen de-
icerThis command supplies
the rear screen and door
mirror heating resistors, if
fitted to the vehicle.
They should be warm. In the event of a fault, apply the
procedure for dealing with
command AC011.

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check87G
87G-62V7 MR-372-J84-87G050$440.mif
UPC
Vdiag No.: 48, 4C
FUNCTION: CHARGE CIRCUIT
SUB-FUNCTION: ALTERNATOR
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine running.
FunctionParameter or Status
Check or ActionDisplay and Notes Fault finding
Alternator faultET023:Alternator
thermal faultABSENTIn the event of a fault, consult the
interpretation of status ET023
Alternator thermal fault.
Alternator chargePR010:Alternator charge0 < X < 99.6%
Activate the heated rear
screen and check that the
value increases.Apply the procedure for PR010
Alternator charge.
Alternator
regulationAC014:Alternator
regulationRun this command with
the engine running.
When the command is
run, the Protection and
Switching Unit sets a
regulation voltage
setpoint for the alternator:
– Alternator voltage =
15 V for 30 seconds.
– Alternator voltage =
13 V for 30 seconds.Apply the procedure for dealing
with command AC014.

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Status summary table87G
87G-64V7 MR-372-J84-87G050$495.mif
UPC
Vdiag No.: 48, 4CENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Status summary table
Tool status Diagnostic tool title
ET002Windscreen wiper protection
ET003+ 12 V after ignition feed relay control
ET004Reverse gear engaged
ET005Manual gearbox lever position
ET010Starting conditions met
ET013High-speed engine fan assembly relay control
ET014Low-speed engine fan assembly relay control
ET018Windscreen wiper park position
ET023Alternator thermal fault
ET027Oil pressure contact
ET062UCH request to injection or Protection and Switching Unit
MR-372-J84-87G050$495.mif