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HOMESERVICE MANUALSTOYOTA2008YARIS S, 4D SEDAN, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 75 (AIR CONDITIONING SYSTEM (DIAGNOSTIC CODES & CIRCUIT TESTS))AIR CONDITIONING SYSTEMCIRCUIT TESTSSTEERING PAD SWITCH CIRCUITPROCEDURE
2008 Toyota Yaris S, 4D Sedan, Automatic

Steering Pad Switch Circuit: Procedure

2008 Toyota Yaris S, 4D Sedan, AutomaticSECTION Procedure
WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT A/C CONTROL ASSEMBLY 
    1. Remove the A/C control assembly with connectors still connected.
      Fig 1: Identifying A/C Control Assembly Connector Terminals
      GTY295178Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D59-10 (ADI1) - D59-9 (SG) AUTO switch: ON Below 2.5 Ω
      D59-10 (ADI1) - D59-9 (SG) OFF switch: ON 330 Ω
      D59-10 (ADI1) - D59-9 (SG) TEMP+ switch: ON 1,010 Ω
      D59-10 (ADI1) - D59-9 (SG) TEMP- switch: ON 3,210 Ω

    NG → See step   2 

    OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE 

  2. INSPECT STEERING PAD SWITCH ASSEMBLY 
    1. Remove the steering pad switch assembly.
      Fig 2: Identifying Steering Pad Switch Assembly Connector Terminals
      GTY307095Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A-3 (AC1) - A-2 (EAC) AUTO switch: ON Below 2.5 Ω
      A-3 (AC1) - A-2 (EAC) OFF switch: ON 330 Ω
      A-3 (AC1) - A-2 (EAC) TEMP+ switch: ON 1,010 Ω
      A-3 (AC1) - A-2 (EAC) TEMP- switch: ON 3,210 Ω

    NG → REPLACE STEERING PAD SWITCH ASSEMBLY 

    OK: Go to next step 

  3. INSPECT SPIRAL CABLE SUB-ASSEMBLY 
    1. Disconnect the connector from the spiral cable sub-assembly.
      Fig 3: Identifying Spiral Cable Sub-Assembly Connector Terminals
      GTY210311Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D15-10 (AC1) - A-3 (AC1) Always Below 1 Ω
      D15-9 (EAC) - A-2 (EAC) Always Below 1 Ω

    NG → REPLACE SPIRAL CABLE SUB-ASSEMBLY 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (A/C CONTROL ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY) 
    1. Disconnect the connector from A/C control assembly.
    2. Disconnect the connector from the spiral cable sub-assembly.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D59-10 (ADI1) - D15-10 (AC1) Always Below 1 Ω
      D59-9 (SG) - D15-9 (EAC) Always Below 1 Ω
      D59-10 (ADI1) - Body ground Always 10 kΩ or higher
      D59-9 (SG) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE 

RENDER: 1.0x

NO RELATED

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

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