check engine RENAULT SCENIC 2008 J84 / 2.G Engine Compartment Connection Unit Repair Manual

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 - Conformity check87G
87G-60V7 MR-372-J84-87G050$440.mif
UPC
Vdiag No.: 48, 4C
FUNCTION: WIPING
SUB-FUNCTION: WIPER POWER
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
WiperAC005:Low-speed
windscreen wiperThis command is used to
activate the windscreen
wiper motor at low
speed.In the event of a fault, apply the
procedure for dealing with
commands AC005 and AC006.
AC006:High-speed
windscreen wiperThis command is used to
activate the windscreen
wiper motor at high
speed.
Windscreen
wiper protectionET002:Windscreen
wiper protectionINACTIVEIn the event of a fault, refer to the
interpretation for status ET002.
Windscreen
wiper park
positionET018:Windscreen
wiper park
positionPRESENT (if the wiper
is not active)
ABSENTIn the event of a fault, refer to the
interpretation of status ET018.
Headlight
washerAC013:Headlight washer
relayThis command is used to
activate the headlight
washers relay on the
right and left-hand side
alternately.In the event of a fault, apply the
procedure for dealing with
command AC013.

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check87G
87G-61V7 MR-372-J84-87G050$440.mif
UPC
Vdiag No.: 48, 4C
FUNCTION: LIGHTING
SUB-FUNCTION: LIGHTING POWER
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
Side lightsAC003:Side lightsThis command
switches on the side
lights.In the event of a fault, apply the
procedure for dealing with
command AC003.
Dipped
headlightsAC002:Dipped
headlightsThis command
switches on the dipped
beam headlights.In the event of a fault, apply the
procedure for dealing with
command AC002.
Main beam
headlightsAC001:Main beam
headlightsThis command
switches on the main
beam headlights.In the event of a fault, apply the
procedure for dealing with
command AC001.
Front fog lightsAC004:Front fog lightsThis command
switches on the front
fog lights.In the event of a fault, apply the
procedure for dealing with
command AC004.

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 - Conformity check87G
87G-63V7 MR-372-J84-87G050$440.mif
UPC
Vdiag No.: 48, 4C
FUNCTION: CHARGE CIRCUIT
SUB-FUNCTION: BATTERY
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 active.
FunctionParameter or Status
Check or ActionDisplay and Notes Fault finding
VoltagesPR004:Battery voltage11 < X < 13.5 V
engine running
< 15.8 VIn the event of a fault, apply the
procedure for dealing with PR004
Battery voltage.
PR008:Battery voltage
after rest12.2 V < X <13.5 VIn the event of a fault, apply the
procedure for dealing with PR008
Battery voltage after rest.

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses87G
87G-65V7 MR-372-J84-87G050$550.mif
UPC
Vdiag No.: 48, 4CENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
ET002
FRONT WIPER PROTECTION
NOTESSpecial notes:
Only apply the checks if the status is ACTIVE or BLOCKED.
If the status is ACTIVE, this indicates that after a wiping request, the Protection and
Switching Unit has detected abnormal operation for more than 6 seconds
(constrained or blocked).
If the status is BLOCKED, this means that the total duration of intermittent pauses is
greater than 2 minutes.
The status returns to INACTIVE as soon as the UCH requests another wiping setpoint
(wiper control adjusted, or request by the rain sensor).
Use Wiring Diagrams Technical Note for Mégane II or Scénic II.
Make sure that nothing is mechanically blocking the movement of the wiper arms (blades stuck, condition and
assembly of the wiper mechanism linkage and that there are no objects that could impede the movement of the
mechanism).
Check that the wiper mechanism is not seized.
Repair if necessary.
Check the condition and connection of connectors CT1 and CN on the Protection and Switching Unit,
component code 1337.
If the connectors are faulty and 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 condition and connection of the windscreen wiper motor connector, component code 212.
If the connector is faulty and 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 insulation, continuity and the absence of interference resistance on the following connections:
–14M between components 1337 and 212,
–14L between components 1337 and 212,
–14K between components 1337 and 212.
If the connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If the fault is still present, contact the Techline.
AFTER REPAIRRepeat the conformity check from the start.
USM_V48_ET002 /USM_V4C_ET002
MR-372-J84-87G050$550.mif

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses87G
87G-66V7 MR-372-J84-87G050$550.mif
UPC
Vdiag No.: 48, 4C
ET004
REVERSE GEAR ENGAGED
NOTESSpecial notes:
Only apply the checks with the ignition switched on and when no faults are present.
Use Wiring Diagrams Technical Note for Mégane II or Scénic II.
5- and 6-speed manual gearbox
Check the condition and connection of the connector of the reverse gear switch, component code 155, the
manual gearbox neutral/reversing lights sensor, component code 1109, and UPC connector MN,
component code 1337.
If the connector is faulty and 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 ignition on and reverse gear engaged, check for + 12 V on connection codes H66P and AP11 of
Protection and Switching Unit connector MN, component code 1337.
If the connection is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check the insulation, continuity and the absence of interference resistance on the following connections:
–AP11 between components 1337 and 1109,
–H66P between components 1337 and 1109.
Reverse gear engaged:
–between AP11 and H66P on component 155.
If the connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If the fault is still present, contact the Techline.
AFTER REPAIRRepeat the conformity check from the start.
USM_V48_ET004 /USM_V4C_ET004

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses87G
87G-67V7 MR-372-J84-87G050$550.mif
UPC
Vdiag No.: 48, 4C
ET004
CONTINUED
Automatic gearbox
Check the condition and connection of the connector of the reverse gear switch component code 155, the
multifunction switch component code 485 and the UPC connector MN component code 1337.
If the connector is faulty and 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 ignition on and reverse gear engaged, check for + 12 V on connection codes H66P and AP11 of
Protection and Switching Unit connector MN, component code 1337.
If the connection is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check the insulation, continuity and the absence of interference resistance on the following connections:
–AP11 between components 1337 and 485,
–H66P between components 1337 and 485.
If the connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If the fault is still present, contact the Techline.
AFTER REPAIRRepeat the conformity check from the start.

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses87G
87G-68V7 MR-372-J84-87G050$550.mif
UPC
Vdiag No.: 48, 4C
ET010
STARTING CONDITIONS MET
NOTESSpecial notes:
Apply the checks if the status is at STATUS 1, STATUS 2 or STATUS 3 or YES, with
the ignition on.
STATUS 1
The UCH is preventing the Protection and Switching Unit from activating the starter.
Run fault finding on this computer (see 87B, Passenger compartment connection unit, UCH Vdiag No.: 44, 48,
4C, 4D, 4F, 50).
STATUS 2
The injection is preventing the Protection and Switching Unit from running the starter.
Run fault finding on this computer (see 13B, Diesel injection and 17B, Petrol injection).
STATUS 3
The automatic gearbox computer is preventing the Protection and Switching Unit from running the starter.
Make sure that the selector lever is in position P or N.
Run fault finding on this computer (see 23A, Automatic gearbox).
YES
If the conditions are met and the starter does not operate, see 16A, Starting - Charging, Starter.
If the fault is still present, contact your Techline.
AFTER REPAIRRepeat the conformity check from the start.
USM_V48_ET010 /USM_V4C_ET010

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