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Home >> Toyota >> 2021 >> 4Runner TRD Pro >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Vehicle Stability Control System (For Hydraulic Brake Booster) - Diagnostic Codes (C1422-U0073) & Symptom Tests >> VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Brake Booster) >> Crawl Indicator Light does not Come ON [08/2015 - 08/2019] >> Procedure

Crawl Indicator Light does not Come ON [08/2015 - 08/2019]: Procedure

  1. CHECK CAN COMMUNICATION LINE 
    1. Turn the ignition switch off.
    2. Connect the Techstream to the DLC3.
    3. Turn the ignition switch to ON.
    4. Turn the Techstream on.
    5. Select CAN Bus Check from the System Selection Menu screen and follow the prompts on the screen to inspect the CAN bus (Refer to DIAGNOSIS SYSTEM [08/2015 - 08/2019] ).

      OK

      CAN Bus Check indicates no malfunctions in CAN communication.

    Result: 

    NG 

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

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] )

    Result: 

    OK 

    See step  2

  2. CHECK FOR DTC 
    1. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
      RESULT

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

    Result: 

    B 

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

    (Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2015 - 08/2019] )

    Result: 

    A 

    See step  3

  3. READ VALUE USING TECHSTREAM (CRAWL CONTROL MAIN SWITCH) 
    1. Turn the ignition switch off.
    2. Connect the Techstream to the DLC3.
    3. Turn the ignition switch to ON.
    4. Turn the Techstream 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 or OFF ON: Crawl switch on
      OFF: Crawl switch off
      -

      OK

      The Techstream displays ON or OFF according to crawl control switch operation.

    Result: 

    NG 

    See step  5

    Result: 

    OK 

    See step  4

  4. READ VALUE USING TECHSTREAM (CRAWL CONTROL LIGHT) 
    1. Turn the ignition switch off.
    2. Connect the Techstream to the DLC3.
    3. Turn the ignition switch to ON.
    4. Turn the Techstream on.
    5. Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.
      ABS/VSC/TRAC

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Crawl Control Light Crawl control 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 (Refer to DATA LIST / ACTIVE TEST [08/2015 - 08/2019] ).
      ABS/VSC/TRAC

      Tester Display Test Part Control Range Diagnostic Note
      Crawl Control Light Crawl control indicator light Indicator light ON/OFF Observe the combination meter.
      RESULT

      Result Proceed to
      Data List Display Data List Display when Performing Active Test ON/OFF Operation
      ON Does not change between ON and OFF A
      Changes between ON and OFF B
      OFF Does not change between ON and OFF A
      Changes between ON and OFF B

    Result: 

    A 

    REPLACE MASTER CYLINDER SOLENOID 

    (Refer to DISASSEMBLY [08/2015 - ] )

    Result: 

    B 

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

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - ] )

  5. CHECK TERMINAL VOLTAGE AND RESISTANCE (IG, +B, GND) 

    Refer to PROCEDURE - Step 10

    Result: 

    OK 

    REPLACE DRIVE MONITOR SWITCH 

    (Refer to REMOVAL [08/2015 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR