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Home >> Lexus >> 2017 >> IS 350 Base, AWD >> Repair and Diagnosis >> Steering >> Steering Column >> Steering Column - Service Information >> Steering Pad Switch >> Inspection [10/2016 - 09/2020] >> Procedure

Inspection [10/2016 - 09/2020]: Procedure

  1. INSPECT STEERING PAD SWITCH ASSEMBLY 
    1. Measure the resistance according to the value(s) in the table below.
      GTY669039Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Steering Pad Switch Assembly)
      *b Seek+
      *c Seek- *d Volume+
      *e Volume- *f MODE
      *g Off Hook *h On Hook
      *i Voice *j Up
      *k Down *l Left
      *m Right *n Enter
      *o Back *p Distance Control
      *q Top *r Lane Departure Alert Main

      Standard Resistance

      Tester Connection Condition Specified Condition
      A-11 - A-8 No switch pushed 95 to 105 kΩ
      SEEK+ switch pushed Below 2.5 Ω
      SEEK- switch pushed 313 to 345 Ω
      Volume+ switch pushed 950 to 1050 Ω
      Volume- switch pushed 2955 to 3265 Ω
      A-10 - A-8 No switch pushed 95 to 105 kΩ
      MODE switch pushed Below 2.5 Ω
      On hook switch pushed 313 to 345 Ω
      Off hook switch pushed 950 to 1050 Ω
      Voice switch pushed 2955 to 3265 Ω
      A-3 - A-8 No switch pushed 95 to 105 kΩ
      Left switch pushed Below 2.5 Ω
      Up switch pushed 313 to 345 Ω
      Down switch pushed 950 to 1050 Ω
      Right switch pushed 2955 to 3265 Ω
      A-2 - A-8 No switch pushed 95 to 105 kΩ
      Enter switch pushed Below 2.5 Ω
      Top switch pushed 313 to 345 Ω
      Back switch pushed 950 to 1050 Ω
      A-4 - B-7 No switch pushed 1 MΩ or higher
      Distance control switch pushed Below 2.5 Ω
      Lane departure alert main switch pushed 228 to 252 Ω
      A-6 - C-1 Always Below 2.5 Ω
      A-7 - B-1 Always Below 2.5 Ω
      A-12 - B-3 Always Below 2.5 Ω
      A-9 - D-1 Always Below 2.5 Ω

      HINT: 

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

    2. Check the illumination.
      GTY643150Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Steering Pad Switch Assembly)
      - -
      1. Connect a battery positive (+) lead to terminal 5 and a negative (-) lead to terminal 8 of the steering pad switch assembly connector.
      2. Check that the steering pad switch assembly illumination illuminates.

        OK

        The steering pad switch assembly illumination illuminates.

        HINT: 

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