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Distance Control Switch Circuit: Procedure

  1. INSPECT DISTANCE CONTROL ECU 
    1. Turn the engine switch on (IG).
      Fig 1: View Of Distance Control ECU Wire Harness
      GTY129311Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection Condition Specified Condition
      J17-16 (MODE) - Body ground Distance control switch ON (pushed) 0 to 2 V
      Distance control switch OFF (pushed) 10 to 14 V

    OK → PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    NG: Go to next step 

  2. INSPECT DISTANCE CONTROL ECU CIRCUIT 
    1. Disconnect the J17 connector.
      Fig 2: Identifying Distance Control ECU Wire Harness Side J17 Connector Front View
      GTY142237Courtesy 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
      J17-16 (MODE) - Body ground Distance control switch ON (pushed) Below 1 Ω
      Distance control switch OFF (pushed) 10 kΩ or higher

    OK → REPLACE DISTANCE CONTROL ECU 

    NG: Go to next step 

  3. INSPECT STEERING PAD SWITCH ASSEMBLY 
    1. Remove the steering pad. Refer to REMOVAL .
      Fig 3: Inspecting Steering Pad Switch Assembly
      GTY138519Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect k1 connector from the spiral cable.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      k1-4 (DIST) - k1-6 (ECC) Distance control switch ON (pushed) Below 2.5 Ω
      k1-4 (DIST) - k1-6 (ECC) Distance control switch OFF (pushed) 10 kΩ or higher

    NG → REPLACE STEERING PAD SWITCH ASSEMBLY 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - SPIRAL CABLE) 
    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 page shown in the brackets.

    HINT: 

    1. Remove the spiral cable.
      Fig 4: Checking Harness And Connector (ECM - Spiral Cable)
      GTY132666Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the J17 connector from the distance control ECU.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Specified Condition
      J24-11 (DIST) - J17-16 (MODE) Below 1 Ω
      J24-11 (DIST) - Body ground 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → REPLACE SPIRAL CABLE