DYNAMIC RADAR CRUISE CONTROL SYSTEM Distance Control Switch Circuit

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 BEAN to communicate with each ECU. Therefore, it does not have a direct connection with the ECM. If there are any malfunctions in the communication line of the steering pad switch, one or more DTCs in the multiplex communication system are output.

WIRING DIAGRAM

A015YSWE01

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Remove the steering pad Click here.

    2. Disconnect the k1 connector from the spiral cable.

      A0160SUE01

    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

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  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.

    Tech Tips



    1. A0161MTE17

      Remove the spiral cable Click here.

    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

      Tech Tips

      The spiral cable makes a maximum of approximately 5 rotations.


    NG

    REPLACE SPIRAL CABLE Click here

    OK

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


    1. A0160JKE01

      Disconnect the distance control ECU connector.

    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

  4. INSPECT DISTANCE CONTROL ECU


    1. A0162YHE02

      Reconnect the distance control ECU connector.

    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

    REPLACE DISTANCE CONTROL ECU Click here

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here