DYNAMIC RADAR CRUISE CONTROL SYSTEM Distance Control Switch Circuit

DESCRIPTION

The distance control switch sets vehicle-to-vehicle distance control mode. The distance control switch is installed in the steering pad switch assembly. The vehicle-to-vehicle distance set value can be changed by operating the steering pad switch assembly (distance control switch) while the dynamic radar cruise control system is operating.

WIRING DIAGRAM

A004ZBEE17
*a MODE
*b Steering Pad Switch Assembly (Distance Control Switch)
*c Spiral with Sensor Cable Sub-assembly
*d Driving Support ECU

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (DISTANCE CONTROL SWITCH)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Powertrain / Radar Cruise / Data List.

    5. Check the Data List to confirm function of the distance control switch.

      Radar Cruise
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Distance Control Switch Distance control switch signal / ON or OFF

      ON: Distance control switch on

      OFF: Distance control switch off

      		 -
      OK
      The display changes in accordance with switch operation.

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  2. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Remove the steering pad switch assembly Click here.

    2. Inspect the steering pad switch assembly Click here.

    3. Install the steering pad switch assembly Click here.


    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  3. INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY

    Note

    The spiral with sensor cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral with sensor cable sub-assembly may cause airbag deployment. Be sure to read the page shown in the link/brackets.


    1. Remove the spiral with sensor cable sub-assembly Click here.

      A004YX2E02

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      z4-4 - H30-12 (DIST) The spiral with sensor cable sub-assembly is centered Below 1 Ω
      The spiral with sensor cable sub-assembly position is 2.5 rotations to the left
      The spiral with sensor cable sub-assembly position is 2.5 rotations to the right
      z4-7 - H30-2 (ECC) The spiral with sensor cable sub-assembly is centered Below 1 Ω
      The spiral with sensor cable sub-assembly position is 2.5 rotations to the left
      The spiral with sensor cable sub-assembly position is 2.5 rotations to the right
      Text in Illustration
      *a

      Component without harness connected

      (Spiral with Sensor Cable Sub-assembly)

      Tech Tips

      The spiral with sensor cable sub-assembly makes a maximum of approximately 5 rotations.

    3. Reinstall the spiral with sensor cable sub-assembly Click here.


    NG

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - DRIVING SUPPORT ECU)


    1. Disconnect the driving support ECU assembly connector.

    2. Disconnect the spiral with sensor cable sub-assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      H5-7 (MODE) - H30-12 (DIST) Always Below 1 Ω
      H5-7 (MODE) or H30-12 (DIST) - Body ground Always Below 1 Ω

    4. Reconnect the driving support ECU assembly connector.

    5. Reconnect the spiral with sensor cable sub-assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - DRIVING SUPPORT ECU)

    OK

  5. CHECK HARNESS AND CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - BODY GROUND)


    1. A004VI5E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Spiral with Sensor Cable Sub-assembly)

      Disconnect the spiral with sensor cable sub-assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      H30-2 (ECC) - Body ground Always Below 1 Ω

    3. Reconnect the spiral with sensor cable sub-assembly connector.


    OK

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - BODY GROUND)