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.
2007 Jeep Wrangler V6-3.8LFACTORY OEM SERVICE PROCEDURE
Engine Control Module - Removal
REMOVAL
The ECM (Engine Control Module) (2) is located in the engine compartment.
Use a diagnostic scan tool to reprogram the new ECM with the vehicles original identification number (VIN) and the vehicles original mileage. If this step is not done, a Diagnostic Trouble
Code (DTC) may be set.
To avoid possible voltage spike damage to the ECM, ignition key must be off, and negative battery cable must be disconnected before unplugging ECM connectors.
1. Disconnect negative battery cable at battery.
2. Remove plastic shields from over electrical connectors. Shields snap to connectors.
3. Carefully unplug two electrical connectors (1) from ECM.
4. Remove ECM mounting bolts (3) and remove ECM (2) from vehicle.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.