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VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Brake Booster) Crawl Indicator Light does not Come ON

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DTC Code DTC Name
  Crawl Indicator Light does not Come ON
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DESCRIPTION

If the following condition is met, the crawl indicator light turns off and crawl control is stopped.


If any of the following conditions are met, the crawl indicator light blinks and crawl control is stopped.


When the vehicle is driven at 25 km/h (16 mph) or more during crawl control, control is temporarily stopped and the crawl indicator light blinks.

When using crawl control continually for a long period of time, if the temperature inside the hydraulic brake booster becomes too high, the crawl indicator light will turn off. After a while, the temperature decreases and crawl control becomes operable.

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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

When replacing the skid control ECU (master cylinder solenoid), perform calibration (Click here).

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PROCEDURE


  1. Click here

    CHECK CAN COMMUNICATION LINE


    1. Turn the ignition switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the intelligent tester on.

    5. Select CAN Bus Check from the System Selection Menu screen and follow the prompts on the screen to inspect the CAN bus (for LHD:Click here, for RHD:Click here).

      OK
      CAN Bus Check indicates no malfunctions in CAN communication.
      Table 1. Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

  2. Click here

    CHECK FOR DTC


    1. Check for DTCs (Click here).

      Table 2. Result
      Result Proceed to
      DTC is not output A
      DTC is output B

  3. Click here

    READ VALUE USING GTS (CRAWL CONTROL MAIN SWITCH AND DIAL SWITCH SIGNAL)


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

    5. Enter the following menus: Body Electrical / D-SEAT SW / Data List.

    6. Check the Data List for proper functioning of the crawl on/off switch (center cluster module switch) and crawl speed selector (center cluster module switch).

      Table 3. D-SEAT SW
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Crawl Control Main Switch Crawl on/off switch/ ON or OFF

      ON: Switch on

      OFF: Switch off

      		 -
      Dial Switch Signal 1 Crawl speed selector/Multi-terrain select road mode selector signal 1/ ON or OFF Switches between ON and OFF according to the ON/OFF Combination Chart below. -
      Dial Switch Signal 2 Crawl speed selector/Multi-terrain select road mode selector signal 2/ ON or OFF -
      Dial Switch Signal 3 Crawl speed selector/Multi-terrain select road mode selector signal 3/ ON or OFF -

      1. A01DUB6E02

        Operate the crawl speed selector/multi-terrain select road mode selector and check that "Dial Switch Signal 1", "Dial Switch Signal 2" and "Dial Switch Signal 3" in the Data List display ON and OFF according to the chart shown below.

        Table 4. Text in Illustration
        *1 Center Cluster Module Switch
        *2 Crawl On/Off Switch
        *3 Multi-terrain Select Switch
        *4 Crawl Speed Selector/Multi-terrain Select Road Mode Selector
        *a Low/MUD & SAND
        *b Medium-low/LOOSE ROCK
        *c Medium/MOGUL
        *d Medium-high/ROCK & DIRT
        *e High/ROCK
        Table 5. ON/OFF Combination Chart for "Dial Switch Signal 1", "Dial Switch Signal 2" and "Dial Switch Signal 3"
        Crawl Speed Selector Position/Multi-terrain Select Road Mode Selector Position Low/MUD & SAND Medium-low/LOOSE ROCK Medium/MOGUL Medium-high/ROCK & DIRT High/ROCK
        Data List Display Dial Switch Signal 1 ON ON OFF OFF OFF
        Dial Switch Signal 2 ON OFF OFF OFF ON
        Dial Switch Signal 3 OFF OFF OFF ON ON
        OK
        The GTS display changes according to crawl on/off switch (center cluster module switch) and crawl speed selector (center cluster module switch) operation.

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    PERFORM ACTIVE TEST USING GTS (CRAWL CONTROL LIGHT)


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.

      Table 6. ABS/VSC/TRC
      Tester Display Test Part Control Range Diagnostic Note
      Crawl Control Light Crawl indicator light Indicator light ON/OFF Observe combination meter

    6. When performing the Crawl Control Light Active Test, check Crawl Control Light in the Data List (Click here).

      Table 7. ABS/VSC/TRC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Crawl Control Light Crawl indicator light/ ON or OFF

      ON: Indicator light on

      OFF: Indicator light off

      		 -
      Table 8. Result
      Result Proceed to
      Data List Display Data List Display when Performing Active Test ON/OFF Operation
      ON Changes between ON and OFF A
      Does not change between ON and OFF (for LHD) B
      Does not change between ON and OFF (for RHD) C
      OFF Changes between ON and OFF A
      Does not change between ON and OFF (for LHD) B
      Does not change between ON and OFF (for RHD) C

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    CHECK HARNESS AND CONNECTOR (CENTER CLUSTER MODULE SWITCH - DRIVING SUPPORT SWITCH CONTROL ECU)


    1. Disconnect the G156 center cluster module switch connector.

    2. Disconnect the G162 driving support switch control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G162-6 (CRWL) - G156-21 (FRB) Always Below 1 Ω
      G162-4 (MOD1) - G156-17 (ECU) Always Below 1 Ω
      G162-11 (MOD3) - G156-19 (DN) Always Below 1 Ω
      G162-2 (MOD2) - G156-18 (UP) Always Below 1 Ω
      G156-24 (E) - Body ground Always Below 1 Ω
      G162-6 (CRWL) or G156-21 (FRB) - Body ground Always 10 kΩ or higher
      G162-4 (MOD1) or G156-17 (ECU) - Body ground Always 10 kΩ or higher
      G162-11 (MOD3) or G156-19 (DN) - Body ground Always 10 kΩ or higher
      G162-2 (MOD2) or G156-18 (UP) - Body ground Always 10 kΩ or higher

  6. Click here

    INSPECT CENTER CLUSTER MODULE SWITCH


    1. Remove the center cluster module switch (Click here).

    2. Inspect the crawl on/off switch (center cluster module switch) and crawl speed selector (center cluster module switch) (Click here).


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    REPAIR CIRCUITS INDICATED BY OUTPUT DTCSClick here

  8. Click here

    GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)Click here

  9. Click here

    REPLACE MASTER CYLINDER SOLENOIDClick here

  10. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. Click here

    REPLACE DRIVING SUPPORT SWITCH CONTROL ECUClick here

  12. Click here

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)Click here

  13. Click here

    REPLACE CENTER CLUSTER MODULE SWITCHClick here

  14. Click here

    REPLACE MASTER CYLINDER SOLENOIDClick here

  15. Click here

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)Click here