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.
2012 Jeep Liberty 2WD V6-3.7LFACTORY OEM SERVICE PROCEDURE
Transmission Control Module - Description
TRANSMISSION CONTROL MODULE - GASOLINE ENGINES
The Transmission Control Module (TCM) is a sub-module within the Powertrain Control Module (PCM) (1). The PCM is located on the right inner fender. The NGC IV (fourth-generation) Powertrain Control Module (PCM) provides integrated electronic control of all transmission functions.
If the vehicle is equipped with a NAG1 transmission the TCM (1) is a separate module located behind the drivers knee bolster to the right of the steering column.
Factory Service Tools
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.