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HOMESERVICE MANUALSLEXUS2010LS 460L AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTINFOTAINMENTNAVIGATION (FOR DVD) (DIAGNOSTIC CODES & CIRCUIT TESTS)NAVIGATION SYSTEM (FOR DVD)STEERING PAD SWITCH CIRCUITPROCEDURE
2010 Lexus LS 460L AWD

Steering Pad Switch Circuit: Procedure

2010 Lexus LS 460L AWDSECTION Procedure
  1. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - SPIRAL CABLE) 
    1. Disconnect the L59 display and navigation module display connector.
    2. Disconnect the L134 spiral cable sub-assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      L59-24 (SW2) - L134-13 (AU2) Always Below 1 Ω
      L59-23 (SWG) - L134-11 (EAU) Always Below 1 Ω
      L59-25 (SW1) - L134-6 (AU1) Always Below 1 Ω
      L59-24 (SW2) - Body ground Always 10 kΩ or higher
      L59-23 (SWG) - Body ground Always 10 kΩ or higher
      L59-25 (SW1) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  2. INSPECT SPIRAL CABLE SUB-ASSEMBLY 
    1. Remove the spiral cable sub-assembly. Refer toREMOVAL .
      Fig 1: Inspecting Spiral Cable Sub-Assembly
      GTY256387Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Steering Pad Switch Side *2 Vehicle Side
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Spiral Cable Position Specified Condition
      11 (EAU) - 3 (EAU) 2.5 rotations to the left Below 3 Ω
      Center
      2.5 rotations to the right
      13 (AU2) - 5 (AU2) 2.5 rotations to the left Below 3 Ω
      Center
      2.5 rotations to the right
      6 (AU1) - 11 (AU1) 2.5 rotations to the left Below 3 Ω
      Center
      2.5 rotations to the right
      NOTE:

      The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the Precaution for the supplemental restraint system. Refer toPRECAUTION .

    NG → See step   5 

    OK: Go to next step 

  3. INSPECT STEERING PAD SWITCH ASSEMBLY 
    1. Remove the steering pad switch assembly. Refer toREMOVAL .
      Fig 2: Inspecting Steering Pad Switch Assembly
      GTY279346Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *A w/ Transmission Shift Switch *B w/o Transmission Shift Switch
      *1 Volume+ Switch *3 Voice Switch
      *2 Volume- Switch - -
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      w/ Transmission Shift Switch 

      w/o Transmission Shift Switch 

      Tester Connection Switch Condition Specified Condition
      11 (AU1) - 3 (EAU) No switch is pushed 100 kΩ
      11 (AU1) - 3 (EAU) Volume+ switch pushed 1000 Ω
      11 (AU1) - 3 (EAU) Volume- switch pushed 3110 Ω
      5 (AU2) - 3 (EAU) No switch is pushed 100 kΩ
      5 (AU2) - 3 (EAU) Voice switch pushed 3110 Ω
      Tester Connection Switch Condition Specified Condition
      11 (AU1) - 3 (EAU) No switch is pushed 100 kΩ
      11 (AU1) - 3 (EAU) Volume+ switch pushed 1000 Ω
      11 (AU1) - 3 (EAU) Volume- switch pushed 3110 Ω
      5 (AU2) - 3 (EAU) No switch is pushed 100 kΩ

    NG → See step   4 

    OK → See step   6 

  4. INSPECT STEERING PAD SWITCH ASSEMBLY (STEERING PAD SIDE) 
    1. Remove the steering pad switch assembly (steering wheel side). Refer toREMOVAL .
      Fig 3: Inspecting Steering Pad Switch Assembly (Steering Pad Side)
      GTY116787Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Seek+ Switch *2 Seek- Switch
      *3 MODE Switch *4 Off Hook Switch
      *5 On Hook Switch - -
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      7 (AU2-1) - 3 (EAU-1) No switch is pushed 1000 kΩ or higher
      7 (AU2-1) - 3 (EAU-1) MODE switch pushed Below 1 Ω
      7 (AU2-1) - 10 (AU2-3) No switch is pushed 1010 Ω
      7 (AU2-1) - 3 (EAU-1) ON hook switch pushed 330 Ω
      7 (AU2-1) - 3 (EAU-1) OFF hook switch pushed 1010 Ω
      6 (AU1-1) - 3 (EAU-1) No switch is pushed 1000 kΩ or higher
      6 (AU1-1) - 3 (EAU-1) Seek+ switch pushed Below 2.5 Ω
      6 (AU1-1) - 3 (EAU-1) Seek- switch pushed 329 Ω
      6 (AU1-1) - 9 (AU1-2) No switch is pushed 330 Ω

    NG → See step   7 

    OK → See step   8 

  5. REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to REMOVAL 
  6. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE 
  7. REPLACE STEERING PAD ASSEMBLY (STEERING PAD SIDE). Refer to REMOVAL 
  8. REPLACE STEERING PAD SWITCH ASSEMBLY (STEERING WHEEL SIDE). Refer to REMOVAL 
RENDER: 1.0x

NO RELATED

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
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