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 DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSANTI-THEFT SYSTEMSTROUBLE SHOOTINGSECURITY SYSTEM CHECK
2000 Saturn SC2 Automatic, MP6
Security System Check
2000 Saturn SC2 Automatic, MP6SECTION Security System Check
NOTE:
Perform REMOTE KEYLESS ENTRY SYSTEM CHECK , before performing SECURITY SYSTEM CHECK.
- Place dome light switch in DOOR position. Lower driver's window. Close all doors. Press LOCK button on remote keyless entry transmitter until horn chirp is heard. Reach into passenger compartment and manually unlock and open driver's door. Horn should chirp for 10 seconds (pre-alarm mode). Daytime Running Lights (DRL) and dome light should begin to flash, and horn should sound after 10 second pre-alarm mode.
- If DRL, dome light or horn do not operate correctly, go to step 4. If DRL, dome light and horn operate correctly, rearm system. Repeat procedure for all doors, one at a time. If system operates correctly for all doors, rearm system and go to next step. If system does not operate correctly, check door jamb switch and circuit for suspect door.
- Reach into passenger compartment and turn ignition switch to ACC or RUN position. If alarm activates, system is okay and system check is complete. If alarm does not activate, perform TEST D: HORN DOES NOT SOUND OR DAYTIME RUNNING LIGHTS DO NOT FLASH WHEN IGNITION IS TURNED ON WITH SECURITY SYSTEM ARMED .
- Check BCM programming. Refer to scan tool user guide for information on using PROGRAM KEY FOBS SPECIAL FUNCTION to program transmitters. If DRL, dome light and horn operate correctly after programming transmitter(s), system is okay and system check is complete. If DRL, dome light or horn do not operate correctly after programming transmitter(s), perform the following:
- If horn does not sound in step 1, perform TEST C: HORN DOES NOT SOUND WHEN DOOR IS OPEN WITH SECURITY SYSTEM ARMED .
- If DRL does not flash in step 1, turn ignition switch to OFF position. Using scan tool, monitor DRL input while commanding DRL ON. If input does not follow scan tool command, perform TEST A: DAYTIME RUNNING LIGHTS DO NOT FLASH WHEN ALARM IS ACTIVATED . If input follows scan tool command, diagnose daytime running lights concern. See appropriate wiring diagram in HEADLIGHT SYSTEMS & DAYTIME RUNNING LIGHTS article.
- If dome light does not flash in step 1, turn ignition switch to OFF position. Using scan tool, monitor dome light while commanding dome light ON. If input does not follow scan tool command, perform TEST B: DOME LIGHT OPERATES IN ON POSITION, BUT NOT IN DOOR POSITION . If input follows scan tool command, diagnose dome light concern. See appropriate wiring diagram in EXTERIOR LIGHTS 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.