2009 Toyota Matrix Base, AutomaticFACTORY OEM SERVICE PROCEDURE

System Outline

* To reduce the steering force required by the driver, assist current is calculated from the torque sensor signal and the vehicle speed signal and then output to the motor.

* If an abnormality is found in the system, the power relay and motor relay (Built in the ECU) are shut off to stop the assistance and the warning light illuminates in the meter.

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Factory Service Tools

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When to See a Mechanic

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

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