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Home >> Toyota >> 2008 >> Avalon XLS >> Repair and Diagnosis >> Brakes >> Brakes Control Systems >> Brake Control System >> Anti-Lock Brake System >> TC and CG Terminal Circuit >> Inspection Procedure

Inspection Procedure

  1. INSPECT DLC3 TERMINAL VOLTAGE (TC TERMINAL VOLTAGE) 
    1. Turn the ignition switch on (IG).
    2. Measure the voltage according to the value(s) in the table below.

      Voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      D20-13 (TC) - Body ground Ignition switch on (IG) 10 to 14 V
    3. Measure the resistance according to the value(s) in the table below.

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      D20-4 (CG) - Body ground Below 1 Ω
      Fig 1: Identifying DLC3 Connector Terminal CG And TC
      G05406649Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG:  Go to step  4

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (ECM TO DLC3) 
    1. Disconnect the ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      A55-27 (TC) - D20-13 (TC) Below 1 Ω
    3. Measure the resistance according to the value(s) in the table below.

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      D20-13 (TC) - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (TC TERMINAL CIRCUIT) 

    Fig 2: Identifying ECM Connector And DLC3 Connector Terminal
    G05406650Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  3. CHECK CAN COMMUNICATION SYSTEM 
    1. Check if the CAN communication system DTC is output (See DIAGNOSIS SYSTEM ).

      Result 

      RESULT CHART

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

      HINT:

      If troubleshooting has been carried out according to the PROBLEM SYMPTOMS TABLE, refer back to the table and proceed to the next step before replacing the part (See PROBLEM SYMPTOMS TABLE  ).

    B : REPAIR CIRCUIT INDICATED BY OUTPUT CODE 

    A : REPLACE BRAKE ACTUATOR ASSEMBLY 

  4. CHECK HARNESS AND CONNECTOR (ECM TO DLC3) 
    1. Disconnect the ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      A55-27 (TC) - D20-13 (TC) Below 1 Ω
    3. Measure the resistance according to the value(s) in the table below.

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      D20-13 (TC) - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (TC CIRCUIT) 

    Fig 3: Identifying ECM Connector And DLC3 Connector Terminal
    G05406651Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

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

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      D20-4 (CG) - Body ground Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) 

    Fig 4: Identifying DLC3 Connector Terminal CG
    G05406652Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  6. CHECK ECM (DLC3 (TC) INPUT) 
    1. Using the SST, connect the terminals TC and CG of the DLC3.

      SST 09843-18040 

    2. Check that the engine warning light is blinking.
      Fig 5: Identifying DLC3 Connector Terminal CG And TC
      G05406653Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      RESULT CHART

      Result Proceed to
      Engine warning light is blinking A
      Engine warning light is not blinking B

    B : REPLACE ECM 

    A: Go to next step 

  7. CHECK CAN COMMUNICATION SYSTEM 
    1. Check if the CAN communication system DTC is output (See DIAGNOSIS SYSTEM ).

      Result 

      RESULT CHART

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

      HINT:

      If troubleshooting has been carried out according to the PROBLEM SYMPTOMS TABLE, refer back to the table and proceed to the next step before replacing the part (See PROBLEM SYMPTOMS TABLE  ).

    B : REPAIR CIRCUIT INDICATED BY OUTPUT CODE 

    A : REPLACE BRAKE ACTUATOR ASSEMBLY 

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