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Inspection Procedure

NOTE: When the distance control ECU is replaced with a new one, initialization must be performed (see INSTALLATION  ).
  1. INSPECT STEERING PAD SWITCH ASSEMBLY 
    1. Remove the steering pad switch assembly.
      Fig 1: Inspecting Steering Pad Switch Assembly
      G05811004Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE

      Tester Connection Condition Specified Condition
      A-4 (DIST) - A-6 (ECC) Distance control switch ON Below 2.5 Ω
      A-4 (DIST) - A-6 (ECC) Distance control switch OFF 10 kΩ or higher

    NG : REPLACE STEERING PAD SWITCH ASSEMBLY 

    OK : Go to next step. 

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

      Standard resistance 

      STANDARD RESISTANCE

      Tester Connection Specified Condition
      A-4 (DIST) - K20-11 (DIST) Below 1 Ω
      A-6 (ECC) - K20-2 (ECC) Below 1 Ω

    NG : REPLACE SPIRAL CABLE 

    Fig 2: Inspecting Spiral Cable
    G05298728Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : Go to next step. 

  3. CHECK HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - SPIRAL CABLE) 
    1. Disconnect the distance control ECU connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE

      Tester Connection Specified Condition
      K20-11 (DIST) - K13-16 (MODE) Below 1 Ω
      K13-16 (MODE) - Body ground 10 kΩ or higher

    NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 3: Checking Harness And Connector (Distance Control ECU - Spiral Cable)
    G05298729Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : Go to next step. 

  4. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - BODY GROUND) 
    1. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE

      Tester Connection Specified Condition
      K20-2 (ECC) - Body ground Below 1 Ω

    NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 4: Checking Harness And Connector (Spiral Cable - Body Ground)
    G05298717Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : Go to next step. 

  5. INSPECT DISTANCE CONTROL ECU 
    1. Remove the distance control ECU (cruise control ECU) with the connector.
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      STANDARD VOLTAGE

      Tester Connection Condition Specified Condition
      K13-16 (MODE) - K13-12 (GND) Distance control switch ON 0 to 2 V
      K13-16 (MODE) - K13-12 (GND) Distance control switch OFF 9 to 16 V

    NG : REPLACE DISTANCE CONTROL ECU 

    Fig 5: Inspecting Distance Control ECU
    G05298731Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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