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DYNAMIC RADAR CRUISE CONTROL SYSTEM Distance Control Switch Circuit

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DTC Code DTC Name
  Distance Control Switch Circuit
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DESCRIPTION

The distance control switch sets the vehicle-to-vehicle distance control mode. The distance control switch is installed in the steering pad switch. The vehicle-to-vehicle distance set value can be changed by operating the steering pad switch (distance control switch) while the dynamic radar cruise control system is in operation. The steering pad switch uses the CAN communication line to communicate with each ECU.

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WIRING DIAGRAM

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INSPECTION PROCEDURE

CAUTION:

The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the Precaution for the SRS (Click here).

Note:

When the distance control ECU is replaced with a new one, initialization must be performed (Click here).

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PROCEDURE


  1. Click here

    READ VALUE USING INTELLIGENT TESTER (VEHICLE DISTANCE)


    1. Using the intelligent tester, read the Data List (Click here).

      Table 1. Radar Cruise
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Car Dist Time Setting

      Vehicle distance time setting condition /

      SHORT, LONG, MID or NO

      		 Vehicle distance selected by steering pad switch (distance control switch) -
      OK
      Normal conditions listed above are displayed.

  2. Click here

    CHECK NO. 1 SWITCH WIRE


    1. A015B2YE05

      Disconnect the A and z36 No. 1 switch wire connectors.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      z36-4 (DIST) - A-2 (DIST) Always Below 1 Ω
      z36-6 (ECC) - A-10 (ECC) Always Below 1 Ω

  3. Click here

    INSPECT STEERING PAD SWITCH


    1. A0155TNE02

      Disconnect the steering pad switch connector from the spiral cable.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      4 (DIST) - 6 (ECC) Distance control switch on (pushed) Below 1 Ω
      Distance control switch off (pushed again) 1 MΩ or higher

  4. Click here

    INSPECT SPIRAL CABLE


    1. A015CYEE02

      Check the spiral cable and connector for scratches, cracks, dents and chips. If any defects are found, replace the spiral cable with a new one.

    2. Check the spiral cable.


      1. Set the spiral cable to the center position (Click here).

      2. After setting the spiral cable to the center position, rotate the spiral cable 2.5 times clockwise, and measure the resistance according to the value(s) in the table below. Then rotate the spiral cable 5 times counterclockwise, and measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        z36-4 (DIST) - E12-11 (DIST) Always Below 1 Ω
        z36-6 (ECC) - E12-2 (ECC)

      3. After setting the spiral cable to the center position, rotate the spiral cable 2.5 times clockwise. Then while rotating the spiral cable 5 times counterclockwise, measure the resistance according to the value(s) in the table below.

        Note:

        As the spiral cable may break, do not rotate the spiral cable more than the specified amount.

        Standard Resistance
        Tester Connection Condition Specified Condition
        z36-4 (DIST) - E12-11 (DIST) Always Below 1 Ω
        z36-6 (ECC) - E12-2 (ECC)

  5. Click here

    CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - DISTANCE CONTROL ECU AND BODY GROUND)


    1. A015C6QE02

      Disconnect the E108 distance control ECU connector.

    2. Disconnect the E12 spiral cable connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E12-2 (ECC) - Body ground Always Below 1 Ω
      E12-11 (DIST) - E108-16 (MODE) Always Below 1 Ω
      E12-11 (DIST) - Body ground Always 10 kΩ or higher

  6. Click here

    REPLACE DISTANCE CONTROL ECUClick here

  7. Click here

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLEClick here

  8. Click here

    REPLACE NO. 1 SWITCH WIRE

  9. Click here

    REPLACE STEERING PAD ASSEMBLYClick here

  10. Click here

    REPLACE SPIRAL CABLEClick here

  11. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR