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.
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HOMESERVICE MANUALSSATURN2000SC2 AUTOMATIC, MP6REPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSSHIFT INTERLOCK SYSTEMSSELF-DIAGNOSTIC SYSTEMDIAGNOSTIC SYSTEM CHECKDIAGNOSTIC PROCEDURE
2000 Saturn SC2 Automatic, MP6
Diagnostic Procedure
2000 Saturn SC2 Automatic, MP6SECTION Diagnostic Procedure
- Connect scan tool to DLC. DLC is located on lower left side of instrument panel, near steering column. If scan tool powers up, go to next step. If scan tool does not power up, diagnose scan tool concern. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
- Turn ignition switch to RUN position. Attempt to establish communication with BCM and PCM. If scan tool communicates with BCM and PCM, go to next step. If scan tool does not communicate with BCM and PCM, diagnose communication concern. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
- If "U" series DTCs (communication DTCs) are not retrieved, go to next step. If "U" series DTCs are retrieved, diagnose body control system. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
- If DTCs B1000 or B1001 are not retrieved, go to next step. If DTCs B1000 or B1001 are retrieved, diagnose body control system. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
- If DTC B1328 is retrieved, diagnose charging system. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. If DTC B1328 is not retrieved, diagnose indicated DTCs as necessary. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If indicated DTCs are not included within this article, see appropriate article related to DTC for diagnosis (i.e., ACCESSORIES & EQUIPMENT, ENGINE PERFORMANCE, etc.).
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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.