DYNAMIC RADAR CRUISE CONTROL SYSTEM Cruise Control Switch Circuit

DESCRIPTION

The cruise control main switch is used to turn the dynamic radar cruise control system on and off, as well as operate 8 functions: SET, -(COAST), TAP-DOWN, RES (RESUME), + (ACCEL), TAP-UP, CANCEL and MODE. 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 it is being operated and turns off when it is released. The driving support ECU assembly then reads the voltage value that has been changed by the switch operation to control MODE, SET, -, RES, +, or CANCEL function. The dynamic radar cruise control system has 2 cruise control modes: constant speed control mode and vehicle-to-vehicle distance control mode.


WIRING DIAGRAM

A01MII3E35

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.

    Click here

  • When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.

PROCEDURE


  1. READ VALUE USING 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 / Radar Cruise / Data List.

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


      Powertrain > Radar Cruise > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Cruise Control Main Switch Cruise control switch signal ON or OFF

      ON: Cruise control main switch pushed

      OFF: Cruise control main switch released

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

      ON: +RES switch on

      OFF: +RES switch off

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

      ON: -SET switch on

      OFF: -SET switch off

      		 -

      Powertrain > Radar Cruise > Data List
      Tester Display
      Cruise Control Main Switch
      RES/ACC Switch
      SET/COAST Switch
      OK
      When the cruise control main 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 MAIN SWITCH


    1. Remove the cruise control main switch.

      Click here

    2. Inspect the cruise control main switch.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CRUISE CONTROL MAIN SWITCH Click here

    OK

  3. INSPECT CRUISE CONTROL SWITCH WIRE


    1. A01MGF3C40
      *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)

      Remove the cruise control switch wire.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z2-1 (R/N) - B-2 (R/N) Always Below 1 Ω
      z2-3 (CCS) - B-3 (CCS) Always Below 1 Ω
      z2-4 (ECC) - B-1 (ECC) Always Below 1 Ω
      z2-1 (R/N) or B-2 (R/N) - Body ground Always 10 kΩ or higher
      z2-3 (CCS) or B-3 (CCS) - Body ground Always 10 kΩ or higher
      z2-4 (ECC) or B-1 (ECC) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CRUISE CONTROL SWITCH WIRE Click here

    OK

  4. INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY


    1. Remove the spiral cable with sensor sub-assembly.

      Click here

    2. Inspect the spiral cable with sensor sub-assembly.

      Click here

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY Click here

    OK

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


    1. Disconnect the G17 spiral cable with sensor sub-assembly connector.

    2. Disconnect the G72 driving support ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G17-1 (CCS) - G72-23 (CCS) Always Below 1 Ω
      G17-8 (R/N) - G72-10 (CCHG) Always Below 1 Ω
      G17-2 (ECC) - Body ground Always Below 1 Ω
      G17-1 (CCS) or G72-23 (CCS) - Body ground Always 10 kΩ or higher
      G17-8 (R/N) or G72-10 (CCHG) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      NG A
      OK (for LHD) B
      OK (for RHD) C

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    B

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    C

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here