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 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

B001Y5DE03

PROCEDURE


  1. READ VALUE USING GTS (CRUISE CONTROL MAIN SWITCH)


    1. Use the Data List to check if the cruise control main switch is functioning properly Click here.

      Cruise Control
      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 Cruise control system standby condition / ON or OFF Each time cruise control main switch (ON/OFF) is pushed, ON or OFF changes -
      Cruise Ready Sub-CPU Cruise control system standby condition / ON or OFF Each time cruise control main switch (ON/OFF) 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.

    OK

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

    NG

  2. INSPECT CRUISE CONTROL SWITCH


    1. Remove the cruise control main switch Click here.

    2. Inspect the cruise control main switch Click here.


    NG

    REPLACE CRUISE CONTROL MAIN SWITCH Click here

    OK

  3. INSPECT CRUISE CONTROL SWITCH WIRE

    A01X8REE01
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Spiral Cable Sub-assembly)
    *b

    Front view of wire harness connector

    (to Cruise Control Main Switch)

    1. Disconnect the z37 spiral cable sub-assembly connector.

    2. Disconnect the A cruise control main switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z37-3 (CCS) - A-3 (CCS) Always Below 1 Ω
      z37-4 (ECC) - A-1 (ECC)
      z37-3 (CCS) - Body ground Always 10 kΩ or higher
      z37-4 (ECC) - Body ground

    NG

    REPLACE CRUISE CONTROL SWITCH WIRE 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.


    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 E112 spiral cable sub-assembly connector.

    2. Disconnect the A38*1 or A52*2 ECM connector.


      • *1: for 3UR-FE, 1VD-FTV (LHD )and 1UR-FE (LHD)

      • *2: for 1UR-FE (RHD), 1GR-FE (RHD) and 1VD-FTV (RHD)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E112-1 (CCS) - A38-60 (CCS)*1 Always Below 1 Ω
      E112-1 (CCS) - A38-40 (CCS)*2
      E112-1 (CCS) - A38-45 (CCS)*3
      E112-1 (CCS) - A52-40 (CCS)*4
      E112-1 (CCS) - A52-45 (CCS)*5
      E112-2 (ECC) - Body ground
      E112-1 (CCS) or A38-60 (CCS)*1 - Body ground Always 10 kΩ or higher
      E112-1 (CCS) or A38-40 (CCS)*2 - Body ground
      E112-1 (CCS) or A38-45 (CCS)*3 - Body ground
      E112-1 (CCS) or A52-40 (CCS)*4 - Body ground
      E112-1 (CCS) or A52-45 (CCS)*5 - Body ground

      • *1: for 3UR-FE

      • *2: for 1VD-FTV (LHD)

      • *3: for 1UR-FE (LHD)

      • *4: for 1VD-FTV (RHD)

      • *5: for 1UR-FE (RHD)

      Result
      Result Proceed to
      OK (for 1UR-FE) A
      OK (for 3UR-FE) B
      OK (for 1VD-FTV) C
      NG D

    A

    REPLACE ECM Click here

    B

    REPLACE ECM Click here

    C

    REPLACE ECM Click here

    D

    REPAIR OR REPLACE HARNESS OR CONNECTOR