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. CHECK ABS WARNING LIGHT 
    1. Disconnect the skid control ECU connector.
    2. Turn the ignition switch to ON.
    3. Check that the ABS warning light comes on.

      OK: The ABS warning light comes on. 

      NG: Go to step 3 

      OK: REPLACE BRAKE ACTUATOR ASSEMBLY (See  REMOVAL   ) 

  3. PERFORM ACTIVE TEST USING TECHSTREAM (ABS WARNING LIGHT) 
    1. Turn the ignition switch off.
    2. Reconnect the skid control ECU connector.
    3. Connect the Techstream to the DLC3.
    4. Perform Active Test of the combination meter using the Techstream (See DATA LIST / ACTIVE TEST ).

      OK: The ABS warning light turns ON or OFF in accordance with the Techstream. 

      NG: CHECK METER/ GAUGE SYSTEM  (See ON-VEHICLE INSPECTION )

      OK: REPLACE BRAKE ACTUATOR ASSEMBLY (See  REMOVAL   ) 

RENDER: 1.0x

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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.