Infiniti M35/M45 Y50. Manual - part 1130

TROUBLE DIAGNOSIS FOR SYSTEM

TF-27

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TF

2. 

CHECK GROUND CIRCUIT

1.

Turn ignition switch “OFF”.

2.

Disconnect AWD control unit harness connector.

3.

Check continuity between AWD control unit harness connector
F109 terminals 10, 11 and ground.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 3.

NG

>> Repair open circuit or short to ground or short to power

in harness or connectors.

3. 

CHECK DTC

Start engine.

Does AWD warning lamp turn OFF?

YES

>> INSPECTION END

NO

>> Perform the self-diagnosis, repair or replace damaged parts. Refer to 

TF-22, "SELF-DIAG

RESULT MODE"

 .

AWD Control Unit

NDS000DO

DIAGNOSTIC PROCEDURE

●

Check the following if “CONTROLLER FAILURE [C1201]” is displayed in self-diagnosis results of CON-
SULT-II.

1. 

PERFORM SELF-DIAGNOSIS

 With CONSULT-II

1.

Turn ignition switch “ON”. (Do not start engine.)

2.

Select “SELF-DIAG RESULTS” mode for “ALL MODE AWD/4WD” with CONSULT-II.

3.

Touch “ERASE”.

4.

Turn ignition switch “OFF” and wait at least 10 seconds.

5.

Perform the self-diagnosis again.

Is the “CONTROLLER FAILURE [C1201]” displayed?

YES

>> Replace AWD control unit. Refer to 

TF-39, "AWD CONTROL UNIT"

 .

NO

>> INSPECTION END

ABS System

NDS000DP

DIAGNOSTIC PROCEDURE

●

Check the following if “ABS SYSTEM [C1203]” is displayed in self-diagnosis results of CONSULT-II.

1. 

CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to 

BRC-24, "Self-Diagnosis"

 .

Is any malfunction detected by self-diagnosis?

YES

>> Check the malfunctioning system.

NO

>> GO TO 2.

Continuity should exist.

SDIA1883E

TF-28

TROUBLE DIAGNOSIS FOR SYSTEM

2. 

CHECK DTC AFTER DRIVING

1.

Turn ignition switch “OFF”.

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 erase self-diagnosis results. Refer to 

TF-22, "How to Erase Self-Diagnostic Results"

 .

5.

Stop vehicle and turn ignition switch “OFF”.

6.

Turn ignition switch “ON”.

7.

Perform self-diagnosis.

Is the “ABS SYSTEM [C1203]” displayed?

YES

>> GO TO 3.

NO

>> INSPECTION END

3. 

CHECK AWD CONTROL UNIT

Check AWD control unit input/output signal. Refer to 

TF-20, "AWD Control Unit Input/Output Signal Reference

Values"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Check AWD control unit pin terminals for damage or loose connection with harness connector. If

any items are damaged, repair or replace damaged parts.

4. 

CHECK DTC

Perform the self-diagnosis, after driving a vehicle for a while.

OK or NG

OK

>> INSPECTION END

NG

>> Perform self-diagnosis with ABS actuator and electric unit (control unit) again. Refer to 

BRC-24,

"Self-Diagnosis"

 .

AWD Solenoid

NDS000DQ

CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE

Data are reference value.

*: The values are changed by throttle opening and engine speed.

DIAGNOSTIC PROCEDURE

●

Check the following if “4WD SOLENOID [C1204]” is displayed in self-diagnosis results of CONSULT-II.

Monitor item [Unit]

Condition

Display value

ETS SOLENOID [A]

Engine running

At idle speed

Approx. 0.000A

When depressing accelerator pedal

Approx. 0.000 - 0.500A*

TROUBLE DIAGNOSIS FOR SYSTEM

TF-29

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TF

1. 

CHECK AWD SOLENOID SIGNAL

 With CONSULT-II

1.

Start engine.

2.

Select “DATA MONITOR” mode for “ALL MODE AWD/4WD” with CONSULT-II.

3.

Read out the value of “ETS SOLENOID”.

*: The values are changed by throttle opening and engine speed.

OK or NG

OK >> GO 

TO 

6.

NG

>> GO TO 2.

2. 

CHECK POWER SUPPLY 

1.

Turn ignition switch “OFF”.

2.

Disconnect AWD control unit harness connector.

3.

Turn ignition switch “ON”. (Do not start engine.)

4.

Check voltage between AWD control unit harness connector ter-
minal 9 and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Check the following. If any items are damaged, repair or 

replace damaged parts.

●

10A fuse [No. 33, located in the fuse block (J/B)]

●

Harness for short or open between battery and AWD
control unit harness connector terminal 9

3. 

CHECK AWD SOLENOID CIRCUIT

1.

Turn ignition switch “OFF”.

2.

Disconnect AWD control unit harness connector.

3.

Check resistance between AWD control unit harness connector
terminals 1 and 2.

 OK or NG

 OK 

>>  GO TO 6.

 NG

>>  GO TO 4.

Condition

Display value

Engine running

At idle speed

Approx. 0.000A

When depressing accelerator 
pedal

Approx. 0.000 - 0.500A*

SDIA1885E

Connector

Terminal

Voltage (Approx.)

F109

9 - Ground

Battery voltage

SDIA1884E

Connector

Terminal

 Resistance (Approx.)

F109

1 - 2 (Ground)

2.45 

Ω

SDIA1928E

TF-30

TROUBLE DIAGNOSIS FOR SYSTEM

4. 

CHECK AWD SOLENOID 

1.

Turn ignition switch “OFF”.

2.

Disconnect transfer assembly harness connector. 

3.

Check resistance between transfer assembly harness connector
F43 terminals 1 and 2.

OK or NG

OK

>> GO TO 5.

NG

>> AWD solenoid is malfunctioning. Replace electric con-

trolled coupling. Refer to 

TF-45, "Disassembly and

Assembly"

 .

5. 

CHECK HARNESS BETWEEN AWD CONTROL UNIT AND AWD SOLENOID

1.

Turn ignition switch “OFF”.

2.

Disconnect AWD control unit harness connector and transfer assembly harness connector.

3.

Check continuity between the following terminals.

–

AWD control unit harness connector F109 terminal 1 and trans-
fer assembly harness connector F43 terminal 1.

–

AWD control unit harness connector F109 terminal 2 and trans-
fer assembly harness connector F43 terminal 2.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace damaged parts.

6. 

CHECK AWD CONTROL UNIT

Check AWD control unit input/output signal. Refer to 

TF-20, "AWD Control Unit Input/Output Signal Reference

Values"

 .

OK or NG

OK

>> GO TO 7.

NG

>> Check AWD control unit pin terminals for damage or loose connection with harness connector. If

any items are damaged, repair or replace damaged parts.

7. 

CHECK DTC

Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG

OK

>> INSPECTION END

NG

>> Replace AWD control unit.

COMPONENT INSPECTION

1.

Turn ignition switch “OFF”.

2.

Disconnect transfer assembly harness connector. 

1 - 2

: Approx. 2.45

Ω

SDIA2162E

1 - 1

: Continuity should exist.

2 - 2

: Continuity should exist.

SDIA2163E