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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 901 (Defogger) >> DTC/Circuit Diagnosis >> Rear Window Defogger Relay >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

  1. CHECK FUSES 

    Check if any of the following fuses in the IPDM E/R are blown.

    COMPONENT PARTS AMPERE FUSE NO.
    IPDM E/R 15A 46
    IPDM E/R 15A 47

    Is the inspection result normal? 

    YES: GO TO 2

    NO: If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.

  2. CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT 
    1. Turn ignition switch ON.
    2. Check voltage between IPDM E/R connector E124 terminal 60 and ground.
      Terminals Condition of rear window defogger switch Voltage (V) (Approx.)
      (+) (-)
      IPDM E/R connector Terminal
      E124 60 Ground ON Battery voltage
      OFF 0
      Fig 1: Checking Voltage Between IPDM E/R Connector And Ground
      G04902834Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO 3

      NO: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION OF IPDM E/R ".

  3. CHECK INTERMITTENT INCIDENT 

    Check intermittent incident.

    Refer to "INTERMITTENT INCIDENT "

    Is the inspection result normal? 

    YES: Check the following.

    • Battery power supply circuit.
    • IPDM E/R.

    NO: Repair or replace the malfunctioning parts.