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On-Vehicle Inspection [06/2018 - ]: Procedure

  1. INSPECT DEF RELAY 
    1. Measure the resistance according to the value(s) in the table below.
      GTY344546Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 - 4 Auxiliary battery voltage applied between terminals 1 and 2 10 kΩ or higher
      3 - 4 Auxiliary battery voltage not applied between terminals Below 1 Ω
      3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω
      3 - 5 Auxiliary battery voltage not applied between terminals 10 kΩ or higher
      4 - 5 Always 10 kΩ or higher

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

  2. INSPECT DEICER RELAY 
    1. Measure the resistance according to the value(s) in the table below.
      GTY457725Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω
      3 - 5 Auxiliary battery voltage not applied between terminals 10 kΩ or higher

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

  3. INSPECT HWD RELAY 
    1. Measure the resistance according to the value(s) in the table below.
      GTY833686Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω
      3 - 5 Auxiliary battery voltage not applied between terminals 10 kΩ or higher

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