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On-Vehicle Inspection

  1. INSPECT DEFOGGER RELAY (Marking: DEFOG) 
    1. Measure the resistance according to the value (s) in the table below.
    Fig 1: Identifying Defogger Relay Circuit With Connector Terminals
    G05846691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard resistance 

    RESISTANCE SPECIFIED CONDITIONS

    Tester Condition Specified Condition
    3-4 Below 1 Ω (when battery voltage is not applied between terminals)
    3-5 10 kΩ or higher (when battery voltage is not applied between terminals)
    3-5 Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

    If the result is not as specified, replace the relay.