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Distance Control Switch Circuit: Procedure

  1. INSPECT STEERING PAD SWITCH ASSEMBLY 
    1. Remove the steering pad. Refer to COMPONENTS .
    2. Disconnect the k1 connector from the spiral cable.
      Fig 1: K1 Connector
      GTY130584Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

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

    NG → See step   6 

    OK: Go to next step 

  2. INSPECT SPIRAL CABLE 
    NOTE:

    The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may cause airbag deployment. Be sure to read the article shown in the brackets.

    HINT: 

    1. Remove the spiral cable. Refer to COMPONENTS .
      Fig 2: Identifying Terminals Of Spiral Cable Connector
      GTY152992Courtesy 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
      k1-4 (DIST) - J24-11 (DIST) The spiral cable position is center Below 1 Ω
      The spiral cable position is 2.5 rotations to the left
      The spiral cable position is 2.5 rotations to the right
      k1-6 (ECC) - J24-2 (ECC) The spiral cable position is center Below 1 Ω
      The spiral cable position is 2.5 rotations to the left
      The spiral cable position is 2.5 rotations to the right

      HINT: 

      The spiral cable makes a maximum of approximately 5 rotations.

    NG → See step   7 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - DISTANCE CONTROL ECU, BODY GROUND) 
    1. Disconnect the distance control ECU connector.
      Fig 3: Identifying Terminals Of Distance Control ECU Connector
      GTY154019Courtesy 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
      J24-11 (DIST) - J17-16 (MODE) Always Below 1 Ω
      J24-11 (DIST) - Body ground Always 10 kΩ or higher
      J24-2 (ECC) - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  4. INSPECT DISTANCE CONTROL ECU 
    1. Reconnect the distance control ECU connector.
      Fig 4: Identifying Terminals Of Distance Control ECU Connector
      GTY154015Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      J17-16 (MODE) - Body ground Distance control switch ON 0 to 2 V
      Distance control switch OFF 11 to 14 V

    NG → See step   8 

    OK → See step   5 

  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  6. REPLACE STEERING PAD SWITCH ASSEMBLY. Refer to  COMPONENTS 
  7. REPLACE SPIRAL CABLE. Refer to  COMPONENTS 
  8. REPLACE DISTANCE CONTROL ECU. Refer to  COMPONENTS 
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