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.
1989 Geo Tracker L4-1590cc 1.6LFACTORY OEM SERVICE PROCEDURE
Engine Control Module: Service and Repair
Removing ECM:
CAUTION: ECM consists of precision parts, be careful not to expose it to excessive shock.
REMOVAL:
1. Disconnect negative battery cable.
2. Disconnect connectors from ECM while releasing connector lock.
3. Remove ECM with cover, loosening two screws.
INSTALLATION:
1. Install ECM with cover.
2. Connect connectors to ECM securely.
3. Connect negative battery cable.
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.