1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connections B31. Refer to “Ground Inspection” in Circuit Inspection.

Is the inspection result normal?
YES >>GO TO 2.
NO >>Repair or replace damaged parts.
2.CHECK TCM INPUT SIGNAL CIRCUIT
Check voltage between TCM vehicle side harness connector terminals.

TCM vehicle side harness connector | Condition | Voltage (Approx.)
Connector | Terminal
B45 | 1 | 4 | Ignition switch ON | Battery voltage (11 – 14 V)
Ignition switch OFF | 0 V
5 | 4 | Ignition switch ON | Battery voltage (11 – 14 V)
Ignition switch OFF | 0 V
14 | 4 | Ignition switch ON | 0 V
Ignition switch OFF | Battery voltage (11 – 14 V)

Is the inspection result normal?
YES>>GO TO 7.
NO >>GO TO 3.
3.CHECK HARNESS BETWEEN TCM AND TCM RELAY (PART 1)

1. Disconnect TCM harness connectors and TCM relay harness connector.
2. Check continuity between TCM vehicle side harness connector terminals and TCM relay vehicle side harness connector terminals.

   TCM vehicle side harness connector | TCM relay vehicle side harness connector | Continuity
   Connector | Terminal | Connector | Terminal
   B45 | 1 | B54 | 6 | Existed
   5
   14 | 1

Is the inspection result normal?
YES>>GO TO 4.
NO >>Repair or replace damaged parts.
4.CHECK HARNESS BETWEEN TCM AND TCM RELAY (PART 2)
Check continuity between TCM vehicle side harness connector terminals and ground.

TCM vehicle side harness connector | Ground | Continuity
Connector | Terminal
B45 | 1 | Ground | Not existed
5
14

Is the inspection result normal?
YES>>GO TO 5.
NO >>Repair or replace damaged parts.
5.CHECK TCM RELAY
Check TCM relay. Refer to Component Inspection (TCM Relay) (GT-R certified NISSAN dealer).
Is the inspection result normal?
YES >>GO TO 6.
NO >>Repair or replace damaged parts.
6.DETECT MALFUNCTIONING ITEM
Check the following. Refer to Wiring Diagram - BATTERY POWER SUPPLY -.

- 20A fuse (No. 36, located in the fuse and fusible link block)
- Fuse and fusible link block
- Harness for open or short TCM relay and battery

Is the inspection result normal?
YES>>GO TO 7.
NO>>Repair or replace damaged parts.
7.CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
>>INSPECTION END