1.CHECK AWD WARNING LAMP Turn the ignition switch ON. Does AWD warning lamp turn ON? YES>>GO TO 2. NO>>Proceed to diagnosis procedure. Refer to Diagnosis Procedure (GT-R certified NISSAN dealer).
2.CHECK PARKING BRAKE SWITCH SIGNAL
With CONSULT‐III
Check “P BRAKE SW” of CONSULT‐III “DATA MONITOR” for “ALL MODE AWD/4WD”.

Monitor Item | Condition | Status
P BRAKE SW | When the parking brake pedal is operration. | On
When the parking brake pedal is not operation. | Off

Is the inspection result normal?
YES>>GO TO 3.
NO>>Perform the trouble diagnosis for parking brake switch signal circuit. Refer to Diagnosis Procedure.
3.CRUISE TEST
Drive the vehicle for a period of time.
Does any symptom occur?
YES>>Replace electric controlled coupling for mechanical malfunction (mechanical engagement of clutch is not possible). Refer to Exploded View (GT-R certified NISSAN dealer).
NO>>Check each harness connector pin terminal for disconnection.