CRUISE CONTROL SYSTEM Cruise Control Switch Circuit

DESCRIPTION

The cruise control main switch operates 7 functions: SET, -, TAP-DOWN, RES, +, TAP-UP, and CANCEL. The SET, TAP-DOWN, and - functions, and the RES, TAP-UP, and + functions are operated with the same switch. The cruise control main switch is an automatic return type switch which turns on only while it is being operated in the direction of each arrow and turns off after being released. The internal contact point of the cruise control main switch is turned on with the switch operation. Then the ECM reads the voltage value that has been changed by the switch operation to control SET, -, RES, +, and CANCEL.

WIRING DIAGRAM

A01EK34E01

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING GTS (CRUISE CONTROL MAIN SWITCH OPERATION)


    1. A01EJC2E16
      Text in Illustration
      *1 ON/OFF
      *2 - SET
      *3 + RES
      *4 CANCEL

      Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Check the Data List for proper functioning of the cruise control main switch.

      Cruise Control (ECM)
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Main SW M-CPU Main switch signal (Main CPU) / ON or OFF

      ON: Main switch on

      OFF: Main switch off

      		 -
      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

      		 -
      OK
      The display changes as shown above according to cruise control main switch operation.
      Result
      Result Proceed to
      OK A
      NG (All items are defective) B
      NG (1 to 3 items are defective) C

    B

    INSPECT CRUISE CONTROL MAIN SWITCH Click here

    C

    REPLACE CRUISE CONTROL MAIN SWITCH Click here

    A

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

  2. INSPECT CRUISE CONTROL MAIN SWITCH


    1. Remove the cruise control main switch Click here.

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

      A01ELD4E09
      Text in Illustration
      *1

      Component without harness connected

      (Cruise Control Main Switch)

      		 *2 Main Switch
      *3 Lever *4 ON/OFF
      *5 - SET *6 + RES
      *7 CANCEL - -
      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 (ECC) - 3 (CCS) Main Switch off 1 MΩ or higher
      Main Switch on Below 2.5 Ω
      + RES 235 to 245 Ω
      - SET 617 to 643 Ω
      CANCEL 1509 to 1571 Ω

    3. Reinstall the cruise control main switch Click here.


    NG

    REPLACE CRUISE CONTROL MAIN SWITCH Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (CRUISE CONTROL MAIN SWITCH - SPIRAL CABLE SUB-ASSEMBLY)


    1. Remove the steering pad Click here.

    2. A01EJ5QE04
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Spiral Cable Sub-assembly)
      *2

      Front view of wire harness connector

      (to Cruise Control Main Switch)

      Disconnect the cruise control main switch connector.

    3. Disconnect the spiral cable sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Cruise control main switch side connector terminal 3 (CCS) - z6-3 (CCS) Always Below 1 Ω
      Cruise control main switch side connector terminal 1 (ECC) - z6-4 (ECC) Always Below 1 Ω

    5. Reconnect the spiral cable sub-assembly connector.

    6. Reconnect the cruise control main switch connector.

    7. Reinstall the steering pad Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (CRUISE CONTROL MAIN SWITCH - SPIRAL CABLE SUB-ASSEMBLY)

    OK

  4. INSPECT SPIRAL CABLE SUB-ASSEMBLY


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


    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

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


    1. Disconnect the ECM connector.

    2. Disconnect the spiral cable sub-assembly connector.

    3. A01EKQPE05
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Spiral Cable Sub-assembly)
      *2

      Front view of wire harness connector

      (to ECM)

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      D18-1 (CCS) - A49-40 (CCS) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      D18-1 (CCS) or A49-40 (CCS) - Body ground Always 10 kΩ or higher

    4. Reconnect the spiral cable sub-assembly connector.

    5. Reconnect the ECM connector.


    NG

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

    OK

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


    1. A01EK7YE02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Spiral Cable Sub-assembly)

      Disconnect the spiral cable sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D18-2 (ECC) - Body ground Always Below 1 Ω
      Result
      Result Proceed to
      NG A
      OK B

    3. Reconnect the spiral cable sub-assembly connector.


    B

    REPLACE ECM Click here

    A

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