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.
Removal & Installation (1.9L - Saturn "S" Series)
Disconnect negative battery cable. Locate PCM. See PCM LOCATION table. Unlock 28-pin PCM harness connector and disconnect. Remove bolt from 80-pin PCM harness connector and disconnect. Remove PCM mounting bolts and remove PCM. To install, reverse removal procedure. Tighten PCM mounting bolts to 53 INCH lbs. (6 N.m). Tighten PCM harness connector bolt to 71 INCH lbs. (8 N.m). Program replacement PCM using appropriate equipment and latest software. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.