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 releasing it. The internal contact points of the cruise control switch turn on with switch operation. Then the hybrid vehicle control ECU assembly 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

A0020EME54

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 power 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
      Main SW M-CPU Cruise control switch signal (Main CPU) 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
      Main SW M-CPU
      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.

      Click here

    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.

      w/o Pre-collision System: Click here

      w/ Pre-collision System: Click here

    2. Inspect the steering pad switch assembly.

      w/o Pre-collision System: Click here

      w/ Pre-collision System: Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY w/o Pre-collision System: Click here
    REPLACE STEERING PAD SWITCH ASSEMBLY w/ Pre-collision System: Click here

    OK

  4. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. Remove the spiral cable sub-assembly.

      Click here

    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 - HYBRID VEHICLE CONTROL ECU ASSEMBLY AND BODY GROUND)


    1. Disconnect the K26 spiral cable sub-assembly connector.

    2. Disconnect the K141 hybrid vehicle control ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K26-7 (CCS) - K141-28 (CCS) Always Below 1 Ω
      K26-2 (ECC) - Body ground Always Below 1 Ω
      K26-7 (CCS) or K141-28 (CCS) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG B

    A

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR