Infiniti G35 (V35) Sedan. Manual - part 395

 

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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 

DLN-14, "Diagnosis Procedure"

.

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 

DLN-49, "Exploded View"

.

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]

C

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DLN

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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 

DLN-15, "Diagnosis Procedure"

.

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 

DLN-49, "Exploded View"

.

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 

DLN-16, "Diagnosis Procedure"

.

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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NO

>> 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 

DLN-69, "Exploded

View"

.

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 

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 

 

 

 

 

 

 

 

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