CRUISE CONTROL SYSTEM Cruise Control Switch Circuit

DESCRIPTION

The cruise control switch is used to turn the cruise control system on and off, as well as operate 7 functions: SET, - (COAST), TAP-DOWN, RES (RESUME), + (ACCEL), TAP-UP and CANCEL. The SET, TAP-DOWN and - (COAST) functions, and the RES (RESUME), TAP-UP and + (ACCEL) functions are operated with the same switch. The cruise control switch is an automatic return type switch which turns on only while operating it in the direction of each arrow and turns off after it is released. The internal contact points of the cruise control switch turn on with switch operation. Then the ECM reads the voltage value that has been changed by the switch operation to control the SET, - (COAST), RES (RESUME), + (ACCEL), and CANCEL functions.

WIRING DIAGRAM

B0065Q7E96

CAUTION / NOTICE / HINT

Note

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

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PROCEDURE


  1. READ VALUE ON GTS


    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 / Cruise Control / Data List.

    5. Read the Data List according to the display on the GTS.


      Powertrain > Cruise Control > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Cruise Main Switch Operation Condition Cruise control main switch (ON/OFF button) status ON or OFF

      ON: Cruise control switch (ON/OFF button) pushed

      OFF: Cruise control switch (ON/OFF button) released

      		 -
      Cancel Switch CANCEL switch signal ON or OFF

      ON: CANCEL switch on

      OFF: CANCEL switch off

      		 -
      SET/COAST Switch -/SET switch signal ON or OFF

      ON: -/SET switch on

      OFF: -/SET switch off

      		 -
      RES/ACC Switch +/RES switch signal ON or OFF

      ON: +/RES switch on

      OFF: +/RES switch off

      		 -

      Powertrain > Cruise Control > Data List
      Tester Display
      Cruise Main Switch Operation Condition
      Cancel Switch
      SET/COAST Switch
      RES/ACC Switch
      OK
      When the cruise control switch is operated, the display changes as shown above.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. INSPECT CRUISE CONTROL SWITCH


    1. Remove the cruise control switch.

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    2. Inspect the cruise control switch.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CRUISE CONTROL SWITCH Click here

    OK

  3. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Remove the steering pad switch assembly.

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    2. Inspect the steering pad switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  4. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. Remove the spiral cable sub-assembly.

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    2. Inspect the spiral cable sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

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


    1. Disconnect the O25 spiral cable sub-assembly connector.

    2. Disconnect the A78 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A78-16 (CCS) - O25-7 (CCS) Always Below 1 Ω
      O25-2 (ECC) - Body ground Always Below 1 Ω
      A78-16 (CCS) or O25-7 (CCS) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR