Nissan Maxima Service and Repair Manual: Rear window defogger switch

Nissan Maxima Service and Repair Manual / Driver controls / Defogger / DTC/circuit diagnosis / Rear window defogger switch

Description

  • The rear window defogger is operated by turning the rear window defogger switch ON.
  • Turns the indicator lamp in the rear window defogger switch ON when operating the rear window defogger.

Component Function Check

1. CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION

Check that the indicator lamp of rear window defogger illuminates with rear window defogger switch ON.

Diagnosis Procedure

1. CHECK A/C AUTO AMP. (REAR WINDOW DEFOGGER SWITCH)

Check A/C auto amp. operation

2.CHECK REAR WINDOW DEFOGGER SWITCH REQUIRE SIGNAL

  1. Turn ignition switch ON.
  2. Check voltage between A/C auto amp. harness connector M37 terminal 27 and ground

Nissan Maxima. CHECK REAR WINDOW DEFOGGER SWITCH REQUIRE SIGNAL

3. CHECK REAR WINDOW DEFOGGER SWITCH REQUIRE SIGNAL CIRCUIT FOR OPEN

  1. Turn ignition switch OFF.
  2. Disconnect A/C auto amp harness connector M37.
  3. Disconnect BCM harness connector M18.
  4. Check continuity between A/C auto amp harness connector M37 terminal 27 and BCM harness connector M18 terminal 38

Nissan Maxima. CHECK REAR WINDOW DEFOGGER SWITCH REQUIRE SIGNAL CIRCUIT FOR OPEN

4. CHECK REAR WINDOW DEFOGGER SWITCH REQUIRE SIGNAL CIRCUIT FOR SHORT

  1. Turn ignition switch OFF.
  2. Disconnect BCM harness connector M18.
  3. Disconnect A/C auto amp harness connector M37.
  4. Check continuity between BCM harness connector M18 terminal 38 and ground.

Nissan Maxima. CHECK REAR WINDOW DEFOGGER SWITCH REQUIRE SIGNAL CIRCUIT FOR SHORT

    DTC/circuit diagnosis

    Rear window defogger relay