Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Transmission Control Module (TCM) (TF-80SC; 2007-2014): Design: KEYLOCK
A lock and safety function is mechanically linked to the ignition switch by a cable. The keylock is controlled by the lock piston position in the ignition switch and by the gear selector lever position. This means that the ignition key can only be removed from the ignition switch if the gear selector lever is in. This also means that the gear selector lever can only be moved from if the ignition key has been turned to position I. The keylock is only available in combination with shiftlock. In order to prevent the gear selector from moving, the central electronic module electrically locks the shiftlock solenoid between key positions I and II since the transmission control module is not supplied power until key position II.
Use the Manual With the Right Hardware
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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.
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