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Home >> Toyota >> 2021 >> 4Runner TRD Pro >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Vehicle Stability Control System (For Vacuum Brake Booster) - Diagnostic Codes (B1380-U0074) & Symptom Tests >> VEHICLE STABILITY CONTROL SYSTEM (for Vacuum Brake Booster) >> TC and CG Terminal Circuit [08/2015 - 08/2019] >> Procedure

TC and CG Terminal Circuit [08/2015 - 08/2019]: Procedure

  1. CHECK CAN COMMUNICATION SYSTEM 

    See step  1

    Result: 

    B 

    CHECK CAN COMMUNICATION SYSTEM 

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

    Result: 

    A 

    See step  2

  2. INSPECT DLC3 
    1. Turn the ignition switch to ON.
      GTY717674Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      F13-13 (TC) - F13-4 (CG) Ignition switch ON 11 to 14 V
      TEXT IN ILLUSTRATION

      *a Front view of DLC3

    Result: 

    NG 

    See step  4

    Result: 

    OK 

    See step  3

  3. REPLACE ECM 
    • SST: 09843-18040 
    1. Turn the ignition switch to ON.
    2. Replace the ECM (Refer to REMOVAL [08/2015 - ] ).
    3. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
      GTY717674Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Front view of DLC3
    4. Check that the ABS warning and slip indicator lights are blinking.

      OK

      The ABS warning and slip indicator lights are blinking.

    Result: 

    OK 

    END 

    Result: 

    NG 

    REPLACE BRAKE ACTUATOR ASSEMBLY 

    (Refer to REMOVAL [08/2015 - 08/2019] )

  4. CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM) 
    1. Turn the ignition switch off.
    2. Disconnect the F50 ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F50-13 (TC) - F13-13 (TC) Always Below 1 Ω
      F50-13 (TC) or F13-13 (TC) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (CG of DLC3 - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY722737Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      F13-4 (CG) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Front view of DLC3

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. REPLACE ECM 
    • SST: 09843-18040 
    1. Turn the ignition switch to ON.
    2. Replace the ECM (Refer to REMOVAL [08/2015 - ] ).
    3. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
      GTY717674Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Front view of DLC3
    4. Check that the ABS warning and slip indicator lights are blinking.

      OK

      The ABS warning and slip indicator lights are blinking.

    Result: 

    OK 

    END 

    Result: 

    NG 

    REPLACE BRAKE ACTUATOR ASSEMBLY 

    (Refer to REMOVAL [08/2015 - 08/2019] )