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Steering Pad Switch: Inspection

WARNING: This page is about a different car, the 2008 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT STEERING PAD SWITCH (w/o Navigation System) 
    1. Disconnect the steering pad switch assembly connector.
      Fig 1: Identifying Steering Pad Switch Assembly Pins
      G05006308Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 2: Identifying Steering Pad Switch Connector Terminals
      G05006309Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the values in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester connection Condition Specified condition
      AU1 - EAU No switch is pushed Approx. 100 kΩ
      AU1 - EAU SEEK+ switch: push Approx. 0 Ω
      AU1 - EAU SEEK-switch: push Approx. 0.3 kΩ
      AU1 - EAU VOL+ switch: push Approx. 1 kΩ
      AU1 - EAU VOL- switch: push Approx. 3.2 kΩ
      AU2 - EAU No switch is pushed Approx. 100 kΩ
      AU2 - EAU MODE switch: push Approx. 0 Ω

      If the result is not as specified, replace the steering pad switch.

  2. INSPECT STEERING PAD SWITCH (w/ Navigation System) 
    1. Disconnect the steering pad switch assembly connector.
      Fig 3: Identifying Steering Pad Switch Connector Terminals
      G05006310Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the values in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester connection Condition Specified condition
      AU1 - EAU No switch is pushed Approx. 100 kΩ
      AU1 - EAU SEEK+ switch: push Approx. 0 Ω
      AU1 - EAU SEEK- switch: push Approx. 0.3 kΩ
      AU1 - EAU VOL+ switch: push Approx. 1 kΩ
      AU1 - EAU VOL- switch: push Approx. 3.2 kΩ
      AU2 - EAU No switch is pushed Approx. 100 kΩ
      AU2 - EAU MODE switch: push Approx. 0 Ω
      AU2 - EAU VOICE switch: push Approx. 3.2 kΩ

      If the result is not as specified, replace the steering pad switch.

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