DYNAMIC RADAR CRUISE CONTROL SYSTEM Distance Control Switch Circuit

DESCRIPTION

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

WIRING DIAGRAM

B003ZAHE23
*a Steering Pad Switch Assembly (Vehicle-to-vehicle Distance Control Switch)
*b Spiral Cable Sub-assembly
*c Driving Support ECU Assembly

PROCEDURE


  1. READ VALUE USING GTS (MODE CHANGE SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

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


      Powertrain > Radar Cruise > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      MODE Change Switch Vehicle-to-vehicle distance control switch signal ON or OFF

      ON: Vehicle-to-vehicle distance control switch on

      OFF: Vehicle-to-vehicle distance control switch off

      		 -

      Powertrain > Radar Cruise > Data List
      Tester Display
      MODE Change Switch
      OK
      The display changes in accordance with switch operation.
      Result
      Proceed to
      OK
      NG

    6. Turn the engine switch off.


    OK

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

    NG

  2. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Inspect the steering pad switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  3. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. Inspect the spiral cable sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

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


    1. Disconnect the F61 spiral cable sub-assembly connector.

    2. Disconnect the F84 driving support ECU 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
      F61-12 (DIST) - F84-6 (SPSW) Always 3 Ω or less
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      F61-12 (DIST) or F84-6 (SPSW) - Body ground Always 1 MΩ or higher

    4. Reconnect the F84 driving support ECU assembly connector.

    5. Reconnect the F61 spiral cable sub-assembly connector.

      Result
      Proceed to
      OK
      NG

    NG

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

    OK

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


    1. Disconnect the F61 spiral 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
      F61-2 (ECC) - Body ground Always 3 Ω or less

    3. Reconnect the F61 spiral cable sub-assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    NG

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