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Home >> Infiniti >> 2018 >> Q70 5.6 Luxe, RWD >> Repair and Diagnosis >> Accessories & Equipment >> Heated Glass/Defoggers >> Defogger (Circuit Diagnosis) (Except Hybrid) >> Circuit Diagnosis >> Door Mirror Defogger >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSE 
    1. Turn ignition switch OFF.
    2. Check 10 A fuse [No. 13, located in fuse block (J/B)].

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

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

  2. CHECK FUSE BLOCK (J/B) 
    1. Turn ignition switch ON.
    2. Check voltage between fuse block (J/B) (fuse block side) and ground.

      (+)

      (-)

      Condition

      Voltage (V)

      (Approx.)

      Fuse block (J/B)

      Connector

      Terminal

      M3

      9C

      Ground

      Rear window defogger switch

      ON

      Battery voltage

      OFF

      0

      10C

      ON

      Battery voltage

      OFF

      0

    Is the inspection result normal?

    YES

    INSPECTION END.

    NO

    Replace fuse block (J/B).