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.
Transaxle Control Module (TCM)
TCM is located behind glove box. See Fig 1. TCM determines shift points and torque converter lock-up timing based on input signals received from various components. Components consist of mode selector switches, Throttle Position Sensor (TPS), input speed (RPM) sensor, output speed sensor, gear position sensor, TCS module, ATF temperature sensor, brake switch and kickdown switch. See Figure.
TCM contains a self-diagnostic system which stores a Diagnostic Trouble Code (DTC). If a transaxle problem exists, DTC's can be retrieved to determine transaxle problem area.
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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.