CRUISE CONTROL SYSTEM Cruise Control Switch Circuit

DESCRIPTION

The cruise control main 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 main 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 main switch turn on with switch operation. Then the ECM reads the voltage value that has been changed by the switch operation to control SET, - (COAST), RES (RESUME), + (ACCEL), and CANCEL.

WIRING DIAGRAM

A004KZRE04

PROCEDURE


  1. READ VALUE ON GTS

    A004IOQE34
    Text in Illustration
    *a ON-OFF
    *b -/SET
    *c +/RES
    *d CANCEL

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Select the following menu items: Powertrain / Cruise Control / Data List.

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

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

      ON: cruise control main switch (ON-OFF button) pushed

      OFF: cruise control main 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

      		 -
      OK
      When the cruise control main switch is operated, the display changes as shown above.

    OK

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

    NG

  2. INSPECT CRUISE CONTROL MAIN SWITCH ASSEMBLY


    1. Inspect the cruise control main switch assembly Click here.


    NG

    REPLACE CRUISE CONTROL MAIN SWITCH ASSEMBLY Click here

    OK

  3. CHECK CRUISE CONTROL MAIN SWITCH WIRE


    1. Disconnect the cruise control main switch assembly connector.

    2. A004JRBE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Spiral Cable with Sensor Sub-assembly)
      *b

      Front view of wire harness connector

      (to Cruise Control Main Switch Assembly)

      Disconnect the spiral cable with sensor sub-assembly connector.

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

      Standard Resistance (Check for open)
      Tester Connection Specified Condition
      Cruise control main switch side connector terminal 3 (R) - z5-4 Below 1 Ω
      Cruise control main switch side connector terminal 1 (B) - z5-3 Below 1 Ω

    NG

    REPAIR OR REPLACE CRUISE CONTROL MAIN SWITCH WIRE

    OK

  4. INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY


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


    NG

    REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY Click here

    OK

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


    1. Disconnect the ECM connector.

    2. Disconnect the spiral cable with sensor 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
      A33-30 (CCS) - D51-11 (CCS) Always Below 1 Ω
      A33-4 (EC) - D51-10 (ECC) Always Below 1 Ω
      Standard Resistance (Check for short)
      Tester Connection Condition Specified Condition
      A33-30 (CCS) or D51-11 (CCS) - Body ground Always 10 kΩ or higher
      A33-4 (EC) or D51-10 (ECC) - Body ground Always 10 kΩ or higher

    OK

    REPLACE ECM Click here

    NG

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