1.CHECK BACK-UP LAMP BULB Check the applicable lamp bulb. Is the bulb normal? YES>>GO TO 2. NO>>Replace the bulb.
2.CHECK BACK-UP LAMP FUSE

1. Turn the ignition switch OFF.
2. Check that the following fuses are not fusing.

   Unit | Location | Fuse No. | Capacity
   Back-up lamp | FUSE BLOCK (J/B) | #4 | 10 A

Is the fuse fusing?
YES>>Repair the malfunctioning part before replacing the fuse.
NO>>GO TO 3.
3.CHECK BACK-UP LAMP RELAY POWER SUPPLY (CONTACT SIDE)

1. Turn the ignition switch ON.
2. Check the voltage between the back-up lamp relay harness connector and ground.

   Terminals | Voltage (Approx.)
   (+) | (–)
   Back-up lamp relay | Ground
   Connector | terminal
   B55 | 6 | Battery voltage

Is the measurement value normal?
YES>>GO TO 4.
NO>>Repair the harnesses or connectors.
4.CHECK BACK-UP LAMP RELAY POWER SUPPLY (COIL SIDE)
Check the voltage between the back-up lamp relay harness connector and ground.

Terminals | Voltage (Approx.)
(+) | (–)
Back-up lamp relay | Ground
Connector | terminal
B55 | 1 | Battery voltage

Is the measurement value normal?
YES>>GO TO 5.
NO>>Check the TCM relay. Refer to Component Inspection (TCM Relay) (GT-R certified NISSAN dealer).
5.CHECK BACK-UP LAMP RELAY
Check the back-up lamp relay. Refer to Component Inspection.
Is the back-up lamp relay normal?
YES>>GO TO 6.
NO>>Replace the back-up lamp relay.
6.CHECK BACK-UP LAMP OPEN CIRCUIT

1. Turn the ignition switch OFF.
2. Remove the back-up lamp relay.
3. Check the continuity between the back-up lamp relay harness connector and rear combination lamp harness connector.

   Back-up lamp relay | Rear combination lamp | Continuity
   Connector | Terminal | Connector | Terminal
   RH | B55 | 7 | B240 | 6 | Existed
   LH | B57 | 6

Does continuity exist?
YES>>GO TO 7.
NO>>Repair the harnesses or connectors.
7.CHECK BACK-UP LAMP GROUND OPEN CIRCUIT
Check the continuity between the rear combination lamp harness connector and the ground.

Rear combination lamp | Ground | Continuity
Connector | Terminal
RH | B240 | 3 | Existed
LH | B57 | 3

Does continuity exist?
YES>>GO TO 8.
NO>>Repair the harnesses or connectors.
8.CHECK BACK-UP LAMP CONTROL SIGNAL OPEN CIRCUIT

1. Disconnect the TCM connector.
2. Check the continuity between the back-up lamp relay harness connector and TCM harness connector.

   Back-up lamp relay | TCM | Continuity
   Connector | Terminal | Connector | Terminal
   B55 | 2 | B45 | 10 | Existed

Does continuity exist?
YES>>Perform self-diagnosis of TCM. Refer to CONSULT-III Function (GT-R certified NISSAN dealer).
NO>>Repair the harnesses or connectors.