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.
2000 Saturn LS1 L4-2.2L VIN FFACTORY OEM SERVICE PROCEDURE
Gearshift
Circuit Chart:
CIRCUIT CHART
Circuit assignments for the Body Control Module (BCM) relating to gearshift:
GEARSHIFT UNLOCK
The gearshift unlock solenoid is energized by the BCM switching circuit 816 to ground. When energized, the gearshift unlock solenoid will allow shifting from PARK. A condition for shifting from PARK is that the foot brake must be applied. The BCM receives this information over the serial data link from the engine controller.
The BCM also monitors ignition 1 circuit 339 and ignition 2 circuit 743 to determine if the ignition switch is in the RUN or ACC position.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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