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CRUISE CONTROL SYSTEM Cruise Control Switch Circuit

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DTC Code DTC Name
  Cruise Control Switch Circuit
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DESCRIPTION

The cruise control main switch is used to operate 7 functions: SET, - (COAST), TAP-DOWN, RES (RESUME), + (ACCELERATION), TAP-UP, and CANCEL. The SET, TAP-DOWN and - (COAST) functions, and the RES (RESUME), TAP-UP and + (ACCELERATION) 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 each arrow direction 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 ECM reads the resistance value that has been changed by the switch operation to control SET, - (COAST), RES (RESUME), + (ACCELERATION) and CANCEL.

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WIRING DIAGRAM

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INSPECTION PROCEDURE

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PROCEDURE


  1. Click here

    READ VALUE USING INTELLIGENT TESTER (CRUISE CONTROL MAIN SWITCH)


    1. Using the intelligent tester, read the Data List (Click here).

      Table 1. Cruise Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Main SW M-CPU Cruise control main switch (Main CPU) / ON or OFF

      ON: Cruise control main switch (Main CPU) on

      OFF: Cruise control main switch (Main CPU) 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
      The intelligent tester display changes according to operation of cruise control main switch.

  2. Click here

    INSPECT CRUISE CONTROL MAIN SWITCH


    1. Remove the cruise control main switch (Click here).

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - 3 Neutral 1MΩ or higher
      Pushed to +RES 235 to 245 Ω
      Pushed to -SET 620 to 640 Ω
      Pushed to CANCEL 1510 to 1570 Ω
      Main switch pushed off 1MΩ or higher
      Main switch pushed on Below 2.5 Ω

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    INSPECT CRUISE CONTROL SWITCH WIRE


    1. Remove the cruise control switch wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z37-3 - 3 Always Below 1 Ω
      z37-4 - 1

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    INSPECT SPIRAL CABLE


    1. If there are any defects as follows, replace the spiral cable with a new one: scratches, cracks, dents or chips on the connector or the spiral cable.

    2. Check spiral cable.


      1. Set the spiral cable to the center position (Click here).

      2. After setting the spiral cable to the center position, rotate the spiral cable 2.5 times clockwise, and measure the resistance according to the value(s) in the table below. Then rotate the spiral cable 5 times counterclockwise, and measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        z37-3 - E12-1 (CCS) Always Below 1 Ω
        z37-4 - E12-2 (ECC)

      3. After setting the spiral cable to the center position, rotate the spiral cable 2.5 times clockwise. Then while rotating the spiral cable 5 times counterclockwise, measure the resistance according to the value(s) in the table below.

        Note:

        As the spiral cable may break, do not rotate the spiral cable more than the specified amount.

        Standard Resistance
        Tester Connection Condition Specified Condition
        z37-3 - E12-1 (CCS) Always Below 1 Ω
        z37-4 - E12-2 (ECC)

  5. Click here

    CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - ECM AND BODY GROUND)


    1. Disconnect the E12 spiral cable connector.

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

      Tip:

      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      Table 2. for 1GR-FE LHD, 1UR-FE LHD, 3UR-FE
      Tester Connection Condition Specified Condition
      E12-1 (CCS) - A38-45 (CCS) Always Below 1 Ω
      E12-1 (CCS) - Body ground Always 10 kΩ or higher
      E12-2 (ECC) - Body ground Always Below 1 Ω
      Table 3. for 1GR-FE RHD, 1UR-FE RHD
      Tester Connection Condition Specified Condition
      E12-1 (CCS) - A52-45 (CCS) Always Below 1 Ω
      E12-1 (CCS) - Body ground Always 10 kΩ or higher
      E12-2 (ECC) - Body ground Always Below 1 Ω
      Table 4. for 1VD-FTV LHD
      Tester Connection Condition Specified Condition
      E12-1 (CCS) - A38-40 (CCS) Always Below 1 Ω
      E12-1 (CCS) - Body ground Always 10 kΩ or higher
      E12-2 (ECC) - Body ground Always Below 1 Ω
      Table 5. for 1VD-FTV RHD
      Tester Connection Condition Specified Condition
      E12-1 (CCS) - A52-40 (CCS) Always Below 1 Ω
      E12-1 (CCS) - Body ground Always 10 kΩ or higher
      E12-2 (ECC) - Body ground Always Below 1 Ω
      Table 6. Result
      Result Proceed to

      OK

      (for 1GR-FE)

      		 A

      OK

      (for 1UR-FE)

      		 B

      OK

      (for 3UR-FE)

      		 C

      OK

      (for 1VD-FTV)

      		 D
      NG E

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    REPLACE ECMClick here

  7. Click here

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLEClick here

  8. Click here

    REPLACE CRUISE CONTROL MAIN SWITCHClick here

  9. Click here

    REPLACE CRUISE CONTROL SWITCH WIRE

  10. Click here

    REPLACE SPIRAL CABLEClick here

  11. Click here

    REPLACE ECMClick here

  12. Click here

    REPLACE ECMClick here

  13. Click here

    REPLACE ECMClick here

  14. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR