2008 Scion tC Base, AutomaticFACTORY OEM SERVICE PROCEDURE

System Outline

When the ignition SW is turned to the ACC position, current from the ACC fuse flows to TERMINAL 6 of the shift lock control ECU. When the ignition SW is turned to ON position, current from the ECU-IG fuse flows to TERMINAL 1 of the shift lock control ECU.

  1. Shift Lock Mechanism 

    If the brake pedal is depressed while the ignition SW is in the ON position (The stop light SW is on), the shift lock control ECU is activated, allowing the driver to change the shift lever to a position other than the P position.

  2. Key Interlock Mechanism 

    If the ignition SW is in the ON or ACC position, and the shift lever is put into the P position, the current flowing from TERMINAL 12 of the shift lock control ECU to key interlock solenoid is cut off. This causes the key interlock solenoid to turn off (Lock lever disengages from LOCK position) and the ignition key can be turned from the ACC to LOCK position.

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:

  • • 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.