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

DESCRIPTION

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 blinking. After a while, the temperature decreases and crawl control becomes operable.

WIRING DIAGRAM

A00O8L4E06

INSPECTION PROCEDURE

Note

When replacing the master cylinder solenoid, perform calibration Click here.

PROCEDURE


  1. 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.
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

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

    C

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

    A

  2. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS Click here

    A

  3. READ VALUE USING INTELLIGENT TESTER (CRAWL CONTROL SWITCH)


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

      D-SEAT SW
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Crawl Control Main Switch Crawl control switch (ON/OFF switch)/ ON or OFF

      ON: Crawl switch on

      OFF: Crawl switch off

      		 -
      Crawl Control Up Switch Crawl Control Switch (Speed selector switch up side)/ ON or OFF

      ON: Speed selector switch up side pushed and held

      OFF: Speed selector switch up side not pushed

      		 -
      Crawl Control Down Switch Crawl Control Switch (Speed selector switch down side)/ ON or OFF

      ON: Speed selector switch down side pushed and held

      OFF: Speed selector switch down side not pushed

      		 -
      OK
      The intelligent tester displays ON or OFF according to crawl control switch operation.

    NG

    Click here

    OK

  4. READ VALUE USING INTELLIGENT TESTER (CRAWL CONTROL LIGHT)


    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. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

      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

      		 -

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

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

    B

    REPLACE MASTER CYLINDER SOLENOID Click here

    C

    REPLACE MASTER CYLINDER SOLENOID Click here

    A

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

  5. CHECK HARNESS AND CONNECTOR (CRAWL CONTROL SWITCH - DRIVING SUPPORT SWITCH CONTROL ECU)


    1. Disconnect the G125 crawl control switch connector.

    2. Disconnect the G76 driving support switch control ECU connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      G125-4 (ECU) - G76-15 (SWI3) Always Below 1 Ω
      G125-4 (ECU) - Body ground Always 10 kΩ or higher
      G125-6 (UP) - G76-13 (SWI4) Always Below 1 Ω
      G125-6 (UP) - Body ground Always 10 kΩ or higher
      G125-5 (DN) - G76-14 (SWI5) Always Below 1 Ω
      G125-5 (DN) - Body ground Always 10 kΩ or higher
      G125-1 (E) - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      G125-4 (ECU) - G76-15 (SWI3) Always Below 1 Ω
      G125-4 (ECU) - Body ground Always 10 kΩ or higher
      G125-5 (UP) - G76-13 (SWI4) Always Below 1 Ω
      G125-5 (UP) - Body ground Always 10 kΩ or higher
      G125-6 (DN) - G76-14 (SWI5) Always Below 1 Ω
      G125-6 (DN) - Body ground Always 10 kΩ or higher
      G125-1 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT CRAWL CONTROL SWITCH


    1. Remove the crawl control switch Click here.

    2. A00O508E02
      Text in Illustration
      *A for LHD
      *B for RHD
      *1 Speed Selector Switch
      *2 ON/OFF Switch
      *a

      Component without harness connected

      (Crawl Control Switch)
      *b Illustration shows switch from LHD vehicles

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

      Standard Resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      6 (UP) - 1 (E) + Below 1 Ω
      FREE 10 kΩ or higher
      5 (DN) - 1 (E) - Below 1 Ω
      FREE 10 kΩ or higher
      4 (ECU) - 1 (E) ON/OFF: Pressed Below 1 Ω
      ON/OFF: Not pressed 10 kΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      5 (UP) - 1 (E) + Below 1 Ω
      FREE 10 kΩ or higher
      6 (DN) - 1 (E) - Below 1 Ω
      FREE 10 kΩ or higher
      4 (ECU) - 1 (E) ON/OFF: Pressed Below 1 Ω
      ON/OFF: Not pressed 10 kΩ or higher

    NG

    REPLACE CRAWL CONTROL SWITCH Click here

    OK

    REPLACE DRIVING SUPPORT SWITCH CONTROL ECU Click here