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HOMESERVICE MANUALSTOYOTA2009YARIS BASE, 4D SEDAN, AUTOMATICREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLBRAKE CONTROLANTI-LOCK BRAKE SYSTEM (FOR HATCHBACK)TC AND CG TERMINAL CIRCUITINSPECTION PROCEDURE
2009 Toyota Yaris Base, 4D Sedan, Automatic

Inspection Procedure

2009 Toyota Yaris Base, 4D Sedan, AutomaticSECTION Inspection Procedure
  1. CHECK CAN COMMUNICATION SYSTEM 
    1. Check if CAN communication system DTCs are output (See DIAGNOSIS SYSTEM ).

      Result 

      RESULT CHART

      Result Proceed to
      DTC not output A
      DTC output B

      B: CHECK CAN COMMUNICATION SYSTEM (See  HOW TO PROCEED WITH TROUBLESHOOTING  ) 

      A: Go to next step 

  2. INSPECT DLC3 
    1. Turn the ignition switch to ON.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      D15-13 (TC) - D15-4 (CG) Ignition switch ON 11 to 14 V

      Result 

      RESULT CHART

      Result Proceed to
      NG A
      OK B

      B: Go to step  5

      Fig 1: Identifying TC And CG Of DLC3 Connector Terminals
      G06132044Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      A: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM) 
    1. Turn the ignition switch off.
    2. Disconnect the ECM connector.
    3. Inspect the connector case and the terminal for deformation and corrosion.

      OK: No deformation or corrosion. 

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      D15-13 (TC) - A21-27 (TC) Always Below 1 Ω
      D15-13 (TC) - Body ground Always 10 kΩ or higher

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 2: Identifying TC Of DLC3 And ECM Connector Terminals
      G06132045Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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.

      Standard Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      D15-4 (CG) - Body ground Always Below 1 Ω

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 3: Identifying CG Of DLC3 Connector Terminals
      G06132046Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  5. INSPECT ECM (TC of DLC3 INPUT) 
    1. Turn the ignition switch off.
    2. Reconnect the ECM connector.
    3. Using SST, connect terminals TC and CG of the DLC3.
    4. Turn the ignition switch to ON.
    5. Check that the check engine warning light is blinking.

      Result 

      RESULT CHART

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

      B: INSPECT SFI SYSTEM  (See MIL CIRCUIT )

      Fig 4: Identifying TC And CG Of DLC3 Connector Terminals
      G06132044Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      A: REPLACE BRAKE ACTUATOR ASSEMBLY (See  REMOVAL   ) 

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.