Infiniti G35 (V35) Sedan. Manual — part 395
DLN-14
< COMPONENT DIAGNOSIS >
[TRANSFER: ETX13B]
C1201 AWD CONTROL UNIT
COMPONENT DIAGNOSIS
C1201 AWD CONTROL UNIT
Description
INFOID:0000000000957231
• Controls driving force distribution by signals from each sensor from rear wheel driving mode (0:100) to AWD
mode (50:50).
• 2WD mode is available by fail-safe function if malfunction is detected in AWD system.
DTC Logic
INFOID:0000000000957232
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
With CONSULT-III
1.
Turn the ignition switch OFF to ON.
2.
Perform the self-diagnosis.
Is DTC “C1201” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000000957233
1.
PERFORM SELF-DIAGNOSIS
With CONSULT-III
1.
Erase AWD control unit self-diagnosis results.
2.
Wait 10 minutes or more after turning the ignition switch OFF.
3.
Perform the self-diagnosis again.
Is DTC “C1201” detected?
YES
>> Replace AWD control unit. Refer to
NO
>> Check AWD control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
DTC
Items
(CONSULT-III screen terms)
Diagnostic item is detected when...
Possible cause
C1201
CONTROLLER FAILURE
Malfunction has occurred inside AWD
control unit.
Internal malfunction of AWD control unit
C1203 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
DLN-15
< COMPONENT DIAGNOSIS >
[TRANSFER: ETX13B]
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C1203 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Description
INFOID:0000000000957234
Transmits the following signals via CAN communication to AWD control unit.
• Vehicle speed signal
• Stop lamp switch signal (brake signal)
DTC Logic
INFOID:0000000000957235
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
With CONSULT-III
1.
Start engine and drive at 30 km/h (19 MPH) or more for approx. 1 minute.
2.
Perform the self-diagnosis.
Is DTC “C1203” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000000957236
1.
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
With CONSULT-III
Perform self-diagnosis with ABS actuator and electric unit (control unit).
Is any malfunction detected by self-diagnosis?
YES
>> Check the malfunctioning system.
NO
>> GO TO 2.
2.
AWD CONTROL UNIT SELF-DIAGNOSIS
With CONSULT-III
1.
Erase AWD control unit self-diagnosis results.
2.
Start engine and drive vehicle at 30 km/h (19 MPH) for at least 1 minute.
3.
Make sure that ABS warning lamp turns OFF.
4.
Perform self-diagnosis of AWD control unit.
Is DTC “C1203” detected?
YES
>> Replace AWD control. Refer to
.
NO
>> Check AWD control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
DTC
Items
(CONSULT-III screen terms)
Diagnostic item is detected when...
Possible cause
C1203
ABS SYSTEM
Malfunction related to wheel sensor has
been detected by ABS actuator and
electric unit (control unit).
ABS malfunction
• Vehicle speed signal error
• Stop lamp switch signal (brake signal)
error
DLN-16
< COMPONENT DIAGNOSIS >
[TRANSFER: ETX13B]
C1204 AWD SOLENOID
C1204 AWD SOLENOID
Description
INFOID:0000000000957237
• Controls electric controlled coupling by command current from AWD control unit.
DTC Logic
INFOID:0000000000957238
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
With CONSULT-III
1.
Turn the ignition switch OFF to ON.
2.
Perform the self-diagnosis.
Is DTC “C1204” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000000957239
1.
AWD SOLENOID VALVE POWER SUPPLY INSPECTION
1.
Turn the ignition switch OFF.
2.
Disconnect AWD control unit harness connector.
3.
Turn the ignition switch ON.
CAUTION:
Never start the engine.
4.
Check the voltage between AWD control unit harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>>
Check the following. If any items are damaged, repair or replace damaged parts.
• 10A fuse (#33) open
- Short among 10A fuse (#33) connector, AWD control unit harness connector No. 9 terminal and
the ground
- Open between the battery and AWD control unit harness connector No. 9 terminal
2.
AWD SOLENOID VALVE GROUND INSPECTION
1.
Turn the ignition switch OFF.
2.
Check the continuity between AWD control unit harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
DTC
Items
(CONSULT-III screen terms)
Diagnostic item is detected when...
Possible cause
C1204
4WD SOLENOID
Malfunction related to AWD solenoid has
been detected.
Internal malfunction of electronic con-
trolled coupling
AWD control unit
Voltage (Approx.)
Connector
Terminal
F108
9 – Ground
Battery voltage
AWD control unit
Continuity
Connector
Terminal
F108
10 – Ground
Existed
11 – Ground
C1204 AWD SOLENOID
DLN-17
< COMPONENT DIAGNOSIS >
[TRANSFER: ETX13B]
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>> Repair or replace damaged parts.
3.
CHECK AWD SOLENOID CIRCUIT (1)
Check the resistance between AWD control unit harness connector terminals.
Is the inspection result normal?
YES >> GO TO 5.
NO
>> GO TO 4.
4.
CHECK AWD SOLENOID CIRCUIT (2)
1.
Disconnect AWD solenoid harness connector.
2.
Check the continuity between AWD control unit harness connector and AWD solenoid harness connector
terminals.
3.
Check the continuity between AWD control unit harness connector and the ground.
4.
Check the continuity between AWD solenoid harness connector and the ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace damaged parts.
5.
CHECK AWD SOLENOID
Check the resistance between AWD solenoid harness connector terminals.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> AWD solenoid is malfunctioning. Replace electric controlled coupling. Refer to
.
6.
CHECK TERMINALS AND HARNESS CONNECTORS
1.
Check AWD control unit pin terminals for damage or loose connection with harness connector.
2.
Check AWD solenoid pin terminals for damage or loose connection with harness connector.
AWD control unit
Resistance (Approx.)
Connector
Terminal
F108
1 – 2
2.45
Ω
AWD control unit
AWD solenoid
Continuity
Connector
Terminal
Connector
Terminal
F108
1
F57
1
Existed
F108
2
F57
2
AWD control unit
Continuity
Connector
Terminal
F108
1 – Ground
Not existed
2 – Ground
AWD solenoid
Continuity
Connector
Terminal
F57
1 – Ground
Not existed
2 – Ground
AWD solenoid
Resistance (Approx.)
Connector
Terminal
F57
1 – 2
2.45
Ω
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