Infiniti M35/M45 Y50. Manual - part 1131

TROUBLE DIAGNOSIS FOR SYSTEM

TF-31

C

E

F

G

H

I

J

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M

A

B

TF

3.

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

4.

If NG, replace electric controlled coupling. Refer to 

TF-45, "Dis-

assembly and Assembly"

 .

AWD Actuator Relay

NDS000DR

CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE

Data are reference value.

DIAGNOSTIC PROCEDURE

●

Check the following if “4WD ACTUATOR RLY [C1205]” is displayed in self-diagnosis results of CONSULT-
II.

1. 

CHECK AWD SOLENOID SYSTEM

Perform self-diagnosis. Refer to 

TF-22, "SELF-DIAG RESULT MODE"

 .

Is the “4WD SOLENOID [C1204]” displayed?

YES

>> Perform trouble diagnosis for AWD solenoid. Refer to 

TF-28, "AWD Solenoid"

 .

NO

>> GO TO 2.

2. 

CHECK AWD ACTUATOR RELAY SIGNAL

 With CONSULT-II

1.

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

2.

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

3.

Start engine and read out ON/OFF signal of “ETS ACTUATOR”.

OK or NG

OK >> GO 

TO 

4.

NG

>> GO TO 3.

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.

1 - 2

: Approx. 2.45

Ω

SDIA2162E

Monitor item

Condition

Display value

ETS ACTUATOR [ON/OFF]

Engine stopped (Ignition switch: ON)

OFF

Engine running

ON

Monitor item

Condition

Display value

ETS ACTUATOR

Engine stopped (Ignition switch: ON)

OFF

Engine running

ON

SDIA1897E

TF-32

TROUBLE DIAGNOSIS FOR SYSTEM

4. 

CHECK DTC

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

OK or NG

OK

>> INSPECTION END

NG

>> Replace AWD control unit.

Engine Control Signal

NDS000DS

DIAGNOSTIC PROCEDURE

●

Check the following if “ECM SIGNAL 1 [C1210]” is displayed in self-diagnosis results of CONSULT-II.

1. 

CHECK DTC WITH ECM

Perform self-diagnosis with ECM. Refer to 

EC-55, "Emission-Related Diagnostic Information"

 .

Is any malfunction detected by self-diagnosis?

YES

>> Check the malfunctioning system.

NO

>> GO TO 2.

2. 

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 3.

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.

3. 

CHECK DTC

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

OK or NG

OK

>> INSPECTION END

NG

>> Perform self-diagnosis with ECM again. Refer to 

EC-55, "Emission-Related Diagnostic Informa-

tion"

 .

CAN Communication Line

NDS000DT

DIAGNOSTIC PROCEDURE

●

Check the following if “CAN COMM CIRCUIT [U1000]” is detected in self-diagnosis results of CONSULT-
II.

1. 

CHECK CAN COMMUNICATION CIRCUIT

 With CONSULT-II

1.

Turn ignition switch “ON” and start engine.

2.

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

3.

Perform the self-diagnosis.

Is the “CAN COMM CIRCUIT [U1000]” displayed?

YES

>> Print out CONSULT-II screen and go to 

LAN-50, "CAN

System Specification Chart"

 .

NO

>> INSPECTION END

SDIA1850E

TROUBLE DIAGNOSIS FOR SYMPTOMS

TF-33

C

E

F

G

H

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J

K

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M

A

B

TF

TROUBLE DIAGNOSIS FOR SYMPTOMS

PFP:00007

AWD Warning Lamp Does Not Turn ON When The Ignition Switch Is Turned to 
ON

NDS000DU

DIAGNOSTIC PROCEDURE

1. 

CHECK SYSTEM FOR CAN COMMUNICATION LINE

Perform self-diagnosis. Refer to 

TF-22, "SELF-DIAG RESULT MODE"

 .

Is the “CAN COMM CIRCUIT [U1000]” displayed?

YES

>> Perform trouble diagnosis for CAN communication line. Refer to 

TF-32, "CAN Communication

Line"

 .

NO

>> GO TO 2.

2. 

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 3.

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.

3. 

CHECK OUTPUT SIGNAL WITH UNIFIED METER AND A/C AMP.

 With CONSULT-II

1.

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

2.

Select “DATA MONITOR” mode for “METER A/C AMP” with CONSULT-II.

3.

Start the engine, and then make sure that “4WD W/L” display
turns from "ON" to "OFF" after several seconds.

OK or NG

OK >> GO 

TO 

4.

NG

>> Perform trouble diagnosis for combination meter. Refer

to 

DI-18, "Trouble Diagnosis"

 .

4. 

SYMPTOM CHECK

Check again.

OK or NG

OK

>> INSPECTION END

NG

>> Replace unified meter control unit assembly. Refer to 

DI-27, "Disassembly and Assembly of Com-

bination Meter"

 .

AWD Warning Lamp Does Not Turn OFF Several Seconds after Engine Started

NDS000DV

DIAGNOSTIC PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS

Perform self-diagnosis. Refer to 

TF-22, "SELF-DIAG RESULT MODE"

 .

Is any malfunction detected by self-diagnosis?

YES

>> Check the malfunctioning system.

NO

>> GO TO 2.

Monitor item

Condition

Display value

4WD W/L

Ignition switch ON

ON

Start engine (after several seconds)

OFF

SDIA2065E

TF-34

TROUBLE DIAGNOSIS FOR SYMPTOMS

2. 

CHECK AWD CONTROL UNIT POWER SUPPLY CIRCUIT

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-
minals and ground.

5.

Turn ignition switch “OFF”.

6.

Check voltage between AWD control unit harness connector ter-
minals 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)]

●

10A fuse [No.82, located in the IPDM E/R]

●

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

●

Harness for short or open between ignition switch and AWD control unit harness connector ter-
minal 7

●

Ignition switch. Refer to 

PG-3, "POWER SUPPLY ROUTING CIRCUIT"

 .

3. 

CHECK AWD CONTROL UNIT 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 4.

NG

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

in harness or connectors.

Connector

Terminal Voltage 

(Approx.)

F109

7 - Ground

Battery voltage

9 - Ground

SDIA2319E

Connector

Terminal Voltage 

(Approx.)

F109

7 - Ground

0V

9 - Ground

Battery voltage

SDIA2320E

Continuity should exist.

SDIA1883E