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TC and CG Terminal Circuit: Procedure

  1. CHECK CAN COMMUNICATION SYSTEM 
    1. Check if a CAN communication system DTC is output. Refer to DTC CHECK / CLEAR .

      Result

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

    B → See step   7 

    A: Go to next step 

  2. INSPECT DLC3 
    1. Turn the engine switch on (IG).
      Fig 1: Identifying DLC3 Connector Terminals
      GTY121176Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      J21-13 (TC) - J21-4 (CG) Engine switch on (IG) 11 to 14 V

      Result

      Result Proceed to
      NG A
      OK B

    B → See step   5 

    A: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM) 
    1. Turn the engine switch off.
      Fig 2: Identifying Connector Terminals
      GTY109052Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J21-13 (TC) - A6-21 (TC) Always Below 1 Ω
      J21-13 (TC) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (CG of DLC3 - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 3: Identifying DLC3 Connector Terminals
      GTY134957Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      J21-4 (CG) - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  5. CHECK ECM (TC of DLC3 INPUT) 
    1. Turn the engine switch off.
      Fig 4: Identifying DLC3 Connector Terminals
      GTY121176Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reconnect the ECM connector.
    3. Using SST, connect terminals TC and CG of the DLC3.
      • SST: 09843-18040 
    4. Turn the engine switch on (IG).
    5. Check that the check engine warning light is blinking.

      Result

      Result Proceed to
      Check engine warning light is blinking A
      Check engine warning light is not blinking B

      HINT: 

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part. Refer to PROBLEM SYMPTOMS TABLE .

    B → REPAIR OR REPLACE WIRE HARNESS OR ECM (TC of ECM CIRCUIT) 

    A → See step   6 

  6. REPLACE SKID CONTROL ECU. Refer to  REMOVAL 
  7. INSPECT CAN COMMUNICATION SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART 
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