Component Tests and General Diagnostics

POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure


1. CHECK AWD CONTROL UNIT POWER SUPPLY (1)

1.Turn the ignition switch OFF.
2.Disconnect AWD control unit harness connector.
3.Check the voltage between AWD control unit harness connector and ground.





4.Turn the ignition switch ON.

CAUTION:
Never start the engine.
5.Check the voltage between AWD control unit harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 2.

2. CHECK AWD CONTROL UNIT POWER SUPPLY (2)

1.Turn the ignition switch OFF.
2.Check the 10A fuse (#49).
3.Disconnect IPDM E/R harness connector.
4.Check the continuity between AWD control unit harness connector and IPDM E/R harness connector.





5.Check the continuity between AWD control unit harness connector and the ground.





Is the inspection result normal?
YES- Perform the trouble diagnosis for ignition power supply circuit. Refer to "Wiring Diagram IGNITION POWER SUPPLY -" Ignition Power Supply.
NO- Repair or replace error-detected parts.

3. CHECK AWD CONTROL UNIT POWER SUPPLY (3)

1.Turn the ignition switch OFF.
2.Check the voltage between AWD control unit harness connector and ground.





3.Turn the ignition switch ON.

CAUTION:
Revision: March 20122013 Infiniti JX
Never start the engine.
4.Check the voltage between AWD control unit harness connector and ground.





Is the inspection result normal?
YES- GO TO 5.
NO- GO TO 4.

4. CHECK AWD CONTROL UNIT POWER SUPPLY (4)

1.Turn the ignition switch OFF.
2.Check the 10A fuse (#25).
3.Disconnect fuse block (J/B) harness connector.
4.Check the continuity between AWD control unit harness connector and fuse block (J/B) harness connector.





5.Check the continuity between AWD control unit harness connector and the ground.





Is the inspection result normal?
YES- Perform the trouble diagnosis for power supply circuit. Refer to "Wiring Diagram BATTERY POWER SUPPLY -" Battery Power Supply.
NO- Repair or replace error-detected parts.

5. CHECK AWD SOLENOID POWER SUPPLY (1)

1.Turn the ignition switch OFF.
2.Disconnect AWD solenoid harness connector.
3.Check the voltage between AWD control unit harness connector and ground.





4.Turn the ignition switch ON.

CAUTION:
Never start the engine.
5.Check the voltage between AWD control unit harness connector and ground.





Is the inspection result normal?
YES- GO TO 7.
NO- GO TO 6.

6. CHECK AWD SOLENOID POWER SUPPLY (2)

1.Turn the ignition switch OFF.
Revision: March 20122013 Infiniti JX
2.Check the 10A fuse (#62)
3.Check the harness for open or short between AWD control unit harness connector No.9 terminal and 10A
fuse (#62).
Is the inspection result normal?
YES- Perform the trouble diagnosis for power supply circuit. Refer to "Wiring Diagram BATTERY POWER SUPPLY -" Battery Power Supply.
NO- Repair or replace error-detected parts.

7. CHECK AWD CONTROL UNIT GROUND

1.Turn the ignition switch OFF.
2.Check the continuity between AWD control unit harness connector and ground.





Is the inspection result normal?
YES- INSPECTION END
NO- Repair or replace error-detected parts.
Revision: March 20122013 Infiniti JX