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Inspection Procedure

NOTE: The vehicle is equipped with an SRS (Supplemental Restraint System), such as airbags. Before servicing (including removal or installation of parts), be sure to read the precautionary notice for the Supplemental Restraint System (See AIRBAG SYSTEM ).
  1. INSPECT RADIO RECEIVER 
    1. Disconnect the radio receiver E15 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified condition
      1CH - GND No switch is pushed Approx. 100 kΩ
      1CH - GND SEEK+ switch: push Approx. 0 Ω
      1CH - GND SEEK- switch: push Approx. 0.3 kΩ
      1CH - GND VOL+ switch: push Approx. 1 kΩ
      1CH - GND VOL- switch: push Approx. 3.2 kΩ
      2CH - GND No switch is pushed Approx. 100 kΩ
      2CH - GND MODE switch: push Approx. 0 Ω
    Fig 1: Identifying Radio Receiver E15 Connector
    G05006218Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: Go to step 2 below 

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

  2. INSPECT STEERING PAD SWITCH ASSEMBLY 
    1. Disconnect the steering pad switch connector.
      Fig 2: Identifying Steering Pad Switch Connector - Front View
      G05006219Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      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

    NG: REPLACE STEERING PAD SWITCH ASSEMBLY 

    OK: Go to Next Step 

  3. INSPECT SPIRAL CABLE 
    1. Disconnect the spiral cable connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified condition
      EAU - EAU Always Below 1 Ω
      AU1 - AU1 Always Below 1 Ω
      AU2 - AU2 Always Below 1 Ω
    Fig 3: Identifying Spiral Cable Connector Terminals
    G05006220Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE - RADIO RECEIVER) 

    NG: REPLACE SPIRAL CABLE