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.
Diagnostic Procedure
2000 Saturn SL1 AutomaticSECTION Diagnostic Procedure
- Connect scan tool. Turn ignition on, engine off. Using scan tool, command door unlock relay on while watching feedback. If door unlock relay feedback is low, go to next step. If door lock relay feedback is not low, problem is intermittent. See DIAGNOSTIC AIDS .
- Disconnect door unlock relay. Using grounded test light, backprobe BCM Purple connector terminal A3 (White wire). See Fig 1 . Using scan tool, command door unlock relay on. If test light is on, replace door unlock relay. If test light is off, go to next step.
- Check White wire from BCM for short to ground. If problem was found, repair as necessary. If problem was not found, replace BCM. See appropriate BODY CONTROL MODULES article.
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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.