Nissan Maxima Service and Repair Manual: 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 Turn ignition switch ON. Check voltage between A/C auto amp. harness connector M37 terminal 27 and ground 3.

  • Rear window defogger relay
  • Description Power is supplied to the rear window defogger with BCM control. Component Function Check 1. CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT Check that an operation noise of rear window defogger relay [located in fuse block (J/B)] can be heard when turning the rear window defogger switch ON. Diagnosis Procedure 1. CHECK REAR WINDOW DEFOGGER RELAY GROUND CIRCUIT Turn ignition switch ON. Check voltage between BCM harness connector M18 terminal 59 and ground. 2. CHECK HARNESS CONTINUITY Turn ignition switch OFF. Disconnect BCM and fuse block (J/B). Check continuity between BCM harness connector M18 (A) terminal 59 and fuse block (J/B) harness connector M4 (B) terminal 4Q.

  • Rear window defogger power supply and ground circuit
  • Description Heats the heating wire with the power supply from the rear window defogger relay to prevent the rear window from fogging up. Component Function Check 1. CHECK REAR WINDOW DEFOGGER Check that the heating wire of rear window defogger is heated when turning the rear window defogger switch ON. Diagnosis Procedure 1. CHECK POWER SUPPLY CIRCUIT Turn ignition switch ON. Check voltage between rear window defogger harness connector B53 terminal 1 and ground. 2. CHECK GROUND CIRCUIT Turn ignition switch OFF. Disconnect rear window defogger. Check continuity between rear window defogger harness connector B54 terminal 2 and ground. 3. CHECK HARNESS CONTINUITY 1 Turn ignition switch OFF.

  • Driver side door mirror defogger
  • Description Heats the heating wire with the power supply from the rear window defogger relay to prevent the door mirror from fogging up. Component Function Check 1. CHECK DOOR MIRROR DEFOGGER LH Check that heating wire of door mirror defogger LH is heated when turning the rear window defogger switch ON. Diagnosis Procedure 1. CHECK POWER SUPPLY CIRCUIT Turn ignition switch OFF. Disconnect door mirror LH. Turn ignition switch ON. Check voltage between door mirror LH harness connector D4 terminal 5 and ground. 2. CHECK GROUND CIRCUIT Turn ignition switch OFF. Check continuity between door mirror LH harness connector D4 terminal 13 and ground. 3.

  • Passenger side door mirror defogger
  • Description Heats the heating wire with the power supply from the rear window defogger relay to prevent the door mirror from fogging up. Component Function Check 1.CHECK DOOR MIRROR DEFOGGER RH Check that the heating wire of door mirror defogger RH is heated when turning the rear window defogger switch ON. Diagnosis Procedure 1. CHECK POWER SUPPLY CIRCUIT Turn ignition switch OFF. Disconnect door mirror RH. Turn ignition switch ON. Check voltage between door mirror RH harness connector D107 terminal 5 and ground. 2. CHECK GROUND CIRCUIT Turn ignition switch OFF. Check continuity between door mirror RH harness connector D107 terminal 13 and ground. 3.

Diagnosis system (BCM)

Rear window defogger switch