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Home >> Infiniti >> 2016 >> Q50 Base, RWD >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Exterior Lighting System (DTC/Circuit Diagnosis) (Except Hybrid) >> DTC/Circuit Diagnosis >> Back-Up Lamp Circuit >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

  1. CHECK BACK-UP LAMP RELAY FUSES

    1. Turn ignition switch OFF.
    2. Check that the following fuse is not blown (open).
    Unit Fuse No. Capacity
    Back - up lamp relay #11 5 A

    Is the fuse blown (open)?

    YES 

    Replace the blown fuse after repairing the affected circuit if a fuse is blown (open).

    NO 

    GO TO STEP 2. 

  2. CHECK BACK-UP LAMP RELAY POWER SUPPLY

    1. Remove back - up lamp relay.
    2. Check voltage between back - up lamp relay harness connector and ground.
      + - Voltage
      (Approx.)
      Back - up lamp relay
      Connector Terminal
      M97 1 Ground Battery voltage
      3

    Is the inspection result normal?

    YES 

    GO TO STEP 3. 

    NO 

    Repair or replace harness.

  3. CHECK BACK-UP LAMP RELAY

    Check back - up lamp relay. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 4. 

    NO 

    Replace back - up lamp relay.

  4. CHECK BACK-UP LAMP RELAY CONTROL SIGNAL OUTPUT

    G-20 With CONSULT

    1. Install back - up lamp relay.
    2. Turn ignition switch ON.
    3. With operating the selector lever, check voltage between A/T assembly harness connector and ground.
      + - Condition Voltage
      (Approx.)
      A/T assembly
      Connector Terminal
      F2 7 Ground Selector lever position "R" 0 V
      Other than above Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 7. 

    NO-1 

    Fixed at 0 - 1 V: GO TO STEP 5. 

    NO-2 

    Fixed at 9 - 16 V: Replace control valve & TCM. Refer to REMOVAL AND INSTALLATION .

  5. CHECK BACK-UP LAMP RELAY CONTROL SIGNAL CIRCUIT

    1. Turn ignition switch OFF.
    2. Remove back - up lamp relay.
    3. Disconnect A/T assembly harness connector.
    4. Check continuity between A/T assembly harness connector and back - up lamp relay harness connector.
      A/T assembly Back - up lamp relay Continuity
      Connector Terminal Connector Terminal
      F2 7 M97 2 Existed

    Is the inspection result normal?

    YES 

    GO TO STEP 6. 

    NO 

    Repair or replace harness.

  6. CHECK JOINT CONNECTOR

    1. Remove joint connector. Refer to EXPLODED VIEW WITH TORQUE SPECIFICATIONS .
    2. Check the continuity between joint connector terminals.
      A/T assembly harness connector side TCM harness connector side Continuity
      Terminal Terminal
      7 7 Existed

    Is the inspection result normal?

    YES 

    Replace control valve & TCM. Refer to REMOVAL AND INSTALLATION .

    NO 

    Replace joint connector.

  7. CHECK BACK-UP LAMP POWER SUPPLY CIRCUIT

    1. Turn ignition switch OFF.
    2. Remove back - up lamp relay.
    3. Disconnect rear combination lamp (trunk lid side) connector.
    4. Check continuity between back - up lamp relay harness connector and rear combination lamp (trunk lid side) harness connector.
      Back - up lamp relay Rear combination lamp (trunk lid side) Continuity
      Connector Terminal Connector Terminal
      RH M97 5 T52 2 Existed
      LH T51

    Is the inspection result normal?

    YES 

    GO TO STEP 8  .

    NO 

    Repair or replace harness.

  8. CHECK BACK-UP LAMP GROUND CIRCUIT

    Check continuity between rear combination lamp (trunk lid side) harness connector and ground.

    Rear combination lamp (trunk lid side) - Continuity
    Connector Terminal
    RH T52 4 Ground Existed
    LH T51

    Is the inspection result normal?

    YES 

    Replace rear combination lamp (trunk lid side). Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace harness.