2012 Scion tC Standard TransFACTORY OEM SERVICE PROCEDURE

Steering Lock System: Precaution: Precaution

  1. PRECAUTIONS WHEN CHECKING FOR DTCS 
    1. When the cable is disconnected from the negative (-) battery terminal, the DTCs stored in the steering lock actuator assembly (steering lock ECU) are cleared. Be sure to record any output DTCs immediately.
    2. Normally, with the engine switch off, even if the Techstream is connected to the vehicle, the information stored in smart key system related ECUs (the certification ECU [smart key ECU assembly], power source control ECU, main body ECU, etc.) cannot be read. However, smart key system DTCs and Data List information can be confirmed even if the engine switch is off using either of the two methods below:
      • Connect the Techstream to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins (the Techstream screen changes when communication begins).
      • Connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: Body Electrical / Smart Key / Trouble Codes.
  2. PRECAUTIONS WHEN REPLACING STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) 
    1. If the steering lock actuator assembly (steering lock ECU) is replaced, be sure to confirm that the steering is unlocked by turning the steering wheel to the left and right before starting the engine. If the steering is locked for any reason, open and close a door with the engine switch off, and then unlock the steering by pressing the engine switch. This prevents the engine from starting while the steering is locked.
  3. PRECAUTION FOR REGISTRATION 
    1. If replacing any of the following parts, refer to the registration procedures. Refer to REGISTRATION .
      NOTE:

      Any electrical key transmitters, or ECUs for which registration has been performed cannot be reused.

      1. ID code box (immobiliser code ECU)
      2. Certification ECU (smart key ECU assembly)
      3. Steering lock actuator assembly (steering lock ECU)
      4. Electrical key transmitter
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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.