1.CHECK AWD SOLENOID POWER SUPPLY

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.

   AWD control unit | — | Voltage
   Connector | Terminal
   B213 | 9 | Ground | Battery voltage

Is the inspection result normal?
YES>>GO TO 2.
NO>>Perform the trouble diagnosis for power supply circuit. Refer to Diagnosis Procedure (GT-R certified NISSAN dealer).
2.CHECK AWD SOLENOID GROUND
Check the continuity between AWD control unit harness connector and ground.

AWD control unit | — | Continuity
Connector | Terminal
B213 | 10 | Ground | Existed
11

Is the inspection result normal?
YES>>GO TO 3.
NO>>Repair or replace error-detected parts.
3.CHECK AWD SOLENOID CIRCUIT

1. Disconnect AWD solenoid harness connector.
2. Check the continuity between AWD control unit harness connector and AWD solenoid harness connector.

   AWD control unit | AWD solenoid | Continuity
   Connector | Terminal | Connector | Terminal
   B213 | 1 | B123 | 1 | Existed
   2 | 2

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

   AWD control unit | — | Continuity
   Connector | Terminal
   B213 | 1 | Ground | Not existed
   2

4. Check the continuity between AWD solenoid harness connector and the ground.

   AWD solenoid | — | Continuity
   Connector | Terminal
   B123 | 1 | Ground | Not existed
   2

Is the inspection result normal?
YES>>GO TO 4.
NO>>Repair or replace error-detected parts.
4.CHECK AWD SOLENOID
Check the resistance between AWD solenoid harness connector terminals. Refer to Component Inspection (GT-R certified NISSAN dealer).
Is the inspection result normal?
YES>>GO TO 5.
NO>>AWD solenoid is malfunctioning. Replace electric controlled coupling. Refer to Exploded View (GT-R certified NISSAN dealer).
5.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.

Is the inspection result normal?
YES>>Replace AWD control unit. Refer to Exploded View (GT-R certified NISSAN dealer).
NO>>Repair or replace error-detected parts.