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Home >> Toyota >> 2018 >> 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) >> TC and CG Terminal Circuit [08/2015 - 08/2019] >> Procedure

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

  1. INSPECT DLC3 
    1. Turn the ignition switch to ON.
    2. Measure the voltage according to the value(s) in the table below.
      GTY526011Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Switch 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  2

  2. 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  3

  3. CHECK DTC (CAN COMMUNICATION SYSTEM) 
    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. Check for DTCs (Refer to DIAGNOSIS SYSTEM [08/2015 - 08/2019] ).
      RESULT

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

    Result: 

    B 

    GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) 

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

    Result: 

    A 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (ECM - DLC3) 
    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
      F50-28 (TC) - F13-13 (TC) Always Below 1 Ω

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

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

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. CHECK ECM (DLC3 INPUT) 
    1. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
      • SST: 09843-18040 
    2. Check that the malfunction indicator lamp is blinking.
      GTY526011Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      RESULT

      Result Proceed to
      MIL is blinking A
      MIL is not blinking B
      TEXT IN ILLUSTRATION

      *a Front view of DLC3

    Result: 

    B 

    REPAIR OR REPLACE WIRE HARNESS OR ECM 

    Result: 

    A 

    See step  7

  7. CHECK DTC (CAN COMMUNICATION SYSTEM) 
    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. Check for DTCs (Refer to DIAGNOSIS SYSTEM [08/2015 - 08/2019] ).
      RESULT

      Result Proceed to
      CAN communication system DTC is not output A
      CAN communication system DTC is output B

    Result: 

    A 

    REPLACE MASTER CYLINDER SOLENOID 

    (Refer to DISASSEMBLY [08/2015 - ] )

    Result: 

    B 

    GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) 

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

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