CRUISE CONTROL SYSTEM(for 8AR-FTS, 2GR-FKS) 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 the SET, - (COAST), RES (RESUME), + (ACCEL), and CANCEL functions.

WIRING DIAGRAM

Figure 1. for 8AR-FTS:

B003U0LE01

Figure 2. for 2GR-FKS:

B003WCRE84

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

  • Before replacing the ECM, refer to Service Bulletin.

PROCEDURE


  1. READ VALUE ON GTS


    1. B003UD6C01
      *a ON/OFF
      *b -/SET
      *c +/RES
      *d CANCEL

      Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

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


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

      ON: CANCEL switch on

      OFF: CANCEL switch off

      		 -
      -SET Switch -SET switch signal ON or OFF

      ON: -SET switch on

      OFF: -SET switch off

      		 -
      +RES Switch +RES switch signal ON or OFF

      ON: +RES switch on

      OFF: +RES switch off

      		 -
      Cruise Ready Main-CPU Cruise control system standby condition (Main-CPU) ON or OFF

      ON: Cruise control switch (ON/OFF switch) pushed

      OFF: Cruise control switch (ON/OFF switch) released

      		 -
      Cruise Ready Sub-CPU Cruise control system standby condition (Sub-CPU) ON or OFF

      ON: Cruise control main switch (Main-CPU) SET

      OFF: Cruise control main switch (Main-CPU) UNSET

      		 -

      Powertrain > Cruise Control > Data List
      Tester Display
      Cancel Switch
      -SET Switch
      +RES Switch
      Cruise Ready Main-CPU
      Cruise Ready Sub-CPU
      OK
      The Data List items shown in the table change according to the operation of the cruise control main switch.
      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 STEERING PAD SWITCH ASSEMBLY


    1. Remove the steering pad switch assembly.

      w/o Pre-collision System: Click here

      w/ Pre-collision System: Click here

    2. Inspect the steering pad switch assembly.

      w/o Pre-collision System: Click here

      w/ Pre-collision System: Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY w/o Pre-collision System: Click here
    REPLACE STEERING PAD SWITCH ASSEMBLY w/ Pre-collision System: 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

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

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


    1. Disconnect the K26 spiral cable sub-assembly connector.

    2. for 8AR-FTS:


      1. Disconnect the A91 ECM connector.

    3. for 2GR-FKS:


      1. Disconnect the A108 ECM connector.

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

      Standard Resistance (for 8AR-FTS)
      Tester Connection Condition Specified Condition
      A91-55 (CCS) - K26-7 (CCS) Always Below 1 Ω
      A91-41 (ECCS) - K26-2 (ECC) Always Below 1 Ω
      A91-55 (CCS) or K26-7 (CCS) - Body ground Always 10 kΩ or higher
      A91-41 (ECCS) or K26-2 (ECC) - Body ground Always 10 kΩ or higher
      Standard Resistance (for 2GR-FKS)
      Tester Connection Condition Specified Condition
      A108-41 (CCS) - K26-7 (CCS) Always Below 1 Ω
      K26-2 (ECC) - Body ground Always Below 1 Ω
      A108-41 (CCS) or K26-7 (CCS) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for 8AR-FTS) A
      OK (for 2GR-FKS) B
      NG C

    B

    REPLACE ECM Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  6. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)


    1. Disconnect the F78 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F78-53 (E1) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR