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Inspection Procedure

  1. INSPECT STEERING PAD SWITCH ASSEMBLY 
    1. Remove the steering pad switch assembly.
      Fig 1: Identifying Distance Control Switch
      G05279938Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance between terminal 4 (DIST) and (ECC) of steering pad switch assembly connector when distance control switch is operated.

    Standard resistance 

    SWITCH POSITION REFERENCE

    Switch position Specified value
    Distance control switch is ON Below 1 Ω
    Distance control switch is OFF 10 kΩ or higher

    HINT:

    When a malfunction is detected in the distance control switch, replace the steering pad switch assembly.

    NG: REPLACE STEERING PAD SWITCH ASSEMBLY 

    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 page shown in the brackets.

    HINT:

    1. Remove the spiral cable.
    2. Measure the resistance according to the value(s) in the table below.

    Standard resistance 

    TESTER CONNECTION SPECIFIED CONDITION

    Tester Condition Spiral Cable Position Specified Condition
    A-4 - C13-11 Center Below 1 Ω
    2.5 rotations to the left
    2.5 rotations to the right
    A-6 - C13-2 Center Below 1 Ω
    2.5 rotations to the left
    2.5 rotations to the right

    HINT:

    The spiral cable makes a maximum of approximately 5 rotations.

    NG: REPLACE SPIRAL CABLE 

    Fig 2: Inspecting Spiral Cable
    G05279939Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  3. CHECK WIRE HARNESS (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 

    TESTER CONNECTION SPECIFIED CONDITION

    Tester Connection Condition Specified Condition
    C13-11 - D2-16 (MODE) Always Below 1 Ω
    D2-16 (MODE) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 3: Disconnecting Distance Control ECU Connector
    G05279940Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

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

    Standard resistance 

    TESTER CONNECTION SPECIFIED CONDITION

    Tester Connection Condition Specified Condition
    C13-2 - Body ground Always Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 4: Identifying Terminals Of Connector C13
    G05279934Courtesy 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 ignition switch to the ON position.
    3. Measure the voltage according to the value(s) in the table below.

    Standard voltage 

    TESTER CONNECTION SPECIFIED CONDITION

    Tester Connection Condition Specified Condition
    D2-16 (MODE) - Body ground Distance control switch ON 0 to 2 V
    D2-16 (MODE) - Body ground Distance control switch OFF 9 to 16 V

    NG: REPLACE DISTANCE CONTROL ECU 

    Fig 5: Identifying Connector D2 Of Distance Control ECU
    G05279942Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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