CRUISE CONTROL SYSTEM Cruise Control Switch Circuit

DESCRIPTION

The cruise control main switch operates 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 point of the cruise control main switch is turned on with the switch operation. Then the power management control ECU reads the voltage value that has been changed by the switch operation to control SET, - (COAST), RES (RESUME), + (ACCEL), and CANCEL.

WIRING DIAGRAM

A01NHENE06

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. A01NCYSE16
      Text in Illustration
      *1 ON/OFF
      *2 - SET
      *3 + RES
      *4 CANCEL

      Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the tester 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 (Power Management Control ECU)
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Main SW M-CPU Cruise control switch (Main CPU)/ON or OFF

      ON: Cruise main switch on

      OFF: Cruise 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
      When the cruise control main switch is operated, the display changes as shown above.
      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.

      A01NEYPE12
      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 - -

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - 3 Main switch off*1 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

      *1: The lever is in the neutral position.

    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. A01NHEOE03
      Text in Illustration
      *1

      Front view of wire harness connector:

      (to Spiral with Sensor Cable Sub-assembly)
      *2

      Front view of wire harness connector:

      (to Cruise Control Main Switch)

      Disconnect the connector from the spiral with sensor cable sub-assembly.

    2. Disconnect the connector from the cruise control main switch.

    3. 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 - z9-3 Always Below 2.5 Ω
      Cruise control main switch side connector terminal 1 - z9-4 Always Below 2.5 Ω

    4. Reconnect the connector to the cruise control main switch.

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


    NG

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

    OK

  4. CHECK SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY

    Note

    The spiral with sensor cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral with sensor cable sub-assembly may cause airbag deployment. Be sure to read the page shown in the brackets.

    Tech Tips



    1. A01NF94E48
      Text in Illustration
      *1

      Component without harness connected:

      (Spiral with Sensor Cable Sub-assembly)

      Remove the spiral with sensor cable sub-assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z9-3 - F40-1 (CCS) The spiral with sensor cable sub-assembly position is center Below 1 Ω
      The spiral with sensor cable sub-assembly position is 2.5 rotations to the left
      The spiral with sensor cable sub-assembly position is 2.5 rotations to the right
      z9-4 - F40-2 (ECC) The spiral with sensor cable sub-assembly position is center Below 1 Ω
      The spiral with sensor cable sub-assembly position is 2.5 rotations to the left
      The spiral with sensor cable sub-assembly position is 2.5 rotations to the right

      Tech Tips

      The spiral with sensor cable sub-assembly makes a maximum of approximately 5 rotations.

    3. Reinstall the spiral with sensor cable sub-assembly.


    NG

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the power management control ECU connector.

    2. Disconnect the spiral with sensor cable sub-assembly connector.

    3. A01NFT9E03
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Spiral with Sensor Cable Sub-assembly)
      *2

      Front view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      F40-1 (CCS) - F98-22 (CCS) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      F40-1 (CCS) or F98-22 (CCS) - Body ground Always 10 kΩ or higher

    4. Reconnect the spiral with sensor cable sub-assembly connector.

    5. Reconnect the power management control ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - POWER MANAGEMENT CONTROL ECU)

    OK

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


    1. A01NGCNE04
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Spiral with Sensor Cable Sub-assembly)

      Disconnect the spiral with sensor cable sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F40-2 (ECC) - Body ground Always Below 1 Ω
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    3. Reconnect the spiral with sensor cable sub-assembly connector.


    B

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    C

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

    A

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here