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.
Doors and Locks
2000 Saturn LW1 L4-2.2L VIN FSECTION Doors and Locks
Circuit Chart:
CIRCUIT CHART
Circuit assignments for the Body Control Module (BCM) relating to doors and locks:
DOOR LOCKING/UNLOCKING
Door locking/unlocking, by Remote Keyless Entry (RKE) or driver/all door lock switches, is controlled through the BCM.
When a driver door unlock has been requested, the BCM switches circuit 1391 to battery voltage. This energizes the driver door unlock relay which supplies power to the driver door lock motor. Grounding is achieved through the closed contacts of the all-door lock relay. Grounding is also achieved through the windings of the all-door lock motors and the all-door unlock relay.
When an all-door unlock has been requested, the BCM switches circuit 194 to battery voltage. This energizes the all-door unlock relay which supplies power to the all-door lock motors. Grounding is achieved through the closed contacts of the door lock relay. Grounding is also achieved through the winding of the driver door lock motor and the driver door unlock relay.
When an all-door lock has been requested, the ECM switches circuit 195 to battery voltage. This energizes the all-door lock relay which supplies power to all-door lock motors. Grounding is achieved through the closed contacts of the driver door unlock relay and all-door unlock relay.
Lock/Unlock power application is limited by the BCM to 7 seconds to protect lock motors.
RENDER: 1.0x
NO RELATED
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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.