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.
2003 Saturn L200 StandardFACTORY OEM SERVICE PROCEDURE
Powertrain Control Module: Installation
- Slide PCM into rear lip of PCM bracket. Push down on PCM until 2 retaining clips are secure. Connect PCM J1 and J2 harness connectors. Connect negative battery cable. Tighten battery terminal bolts to specification. See TORQUE SPECIFICATIONS .
- If a new PCM is being installed, it MUST be reprogrammed with new software and calibrations. After reprogramming PCM, perform crankshaft position variation learn procedure and programming theft deterrent system components. See PROGRAMMING .
- Verify no DTCs exist. If one exists, refer to the specific DTC diagnostic test. See appropriate SELF-DIAGNOSTICS article. Reset clock and preset radio stations.
Factory Service Tools
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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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