DYNAMIC RADAR CRUISE CONTROL SYSTEM(for 6AR-FSE) 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 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 the SET, - (COAST), RES (RESUME), + (ACCEL), and CANCEL functions.

WIRING DIAGRAM

A01W2W4E02

PROCEDURE


  1. READ VALUE USING GTS (CANCEL SWITCH, -SET SWITCH, +RES SWITCH, CRUISE READY MAIN-CPU, CRUISE READY SUB-CPU)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Radar Cruise1 / Data List.

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

      Radar Cruise1
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Cancel Switch CANCEL switch status / ON or OFF

      ON: CANCEL switch on

      OFF: CANCEL switch off

      		 -
      -SET Switch -/SET switch status / ON or OFF

      ON: -/SET switch on

      OFF: -/SET switch off

      		 -
      +RES Switch +/RES switch status / ON or OFF

      ON: +/RES switch on

      OFF: +/RES switch off

      		 -
      Cruise Ready Main-CPU Dynamic radar cruise control system standby condition / ON or OFF Each time cruise control main switch (ON/OFF button) is pushed, ON or OFF changes -
      Cruise Ready Sub-CPU Dynamic radar cruise control system standby condition / ON or OFF Each time cruise control main switch (ON/OFF button) is pushed, ON or OFF changes -
      OK
      The Data List items shown in the table change according to the operation of the cruise control main switch.

    6. Turn the engine switch off.


    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.

    3. Reinstall the cruise control main switch Click here.


    NG

    REPLACE CRUISE CONTROL MAIN SWITCH Click here

    OK

  3. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Remove the steering pad switch assembly Click here.

    2. Inspect the steering pad switch assembly Click here.

    3. Reinstall the steering pad switch assembly Click here.


    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY 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.

    3. Reinstall the spiral cable 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 A75 ECM connector.

    2. Disconnect the H22 spiral cable 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
      A75-55 (CCS) - H22-7 (CCS) Always Below 1 Ω
      A75-41 (ECCS) - H22-2 (ECC) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A75-55 (CCS) or H22-7 (CCS) - Body ground Always 10 kΩ or higher
      A75-41 (ECCS) or H22-2 (ECC) - Body ground Always 10 kΩ or higher

    4. Reconnect the H22 spiral cable sub-assembly connector.

    5. Reconnect the A75 ECM connector.


    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR