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 LW1 AutomaticFACTORY OEM SERVICE PROCEDURE
Body Control Modules
- Description
- Operation
- Component Locations
- Trouble Shooting
- Self-Diagnostic System
- Diagnostic Trouble Code Definitions
- Diagnostic Tests
- DTC B1000: Ecu Malfunction
- DTC B1001: Option Configuration Error
- DTC B1327: Device Power No. 1 Circuit Low
- DTC B1328: Device Power No. 1 Circuit High
- DTC B1372: Device Ignition No. 1 Circuit Low
- DTC B1382: Device Ignition Accessory Circuit Low
- DTC B2965: Key-In-Ignition Circuit Open
- DTC U1000: Class-2 Serial Data Link Malfunction
- DTC U1016: Lost Communications With Engine Controls System
- DTC U1064: Lost Communications With BCM
- DTC U1088: Lost Communications With SDM
- DTC U1096: Lost Communications With IPC
- DTC U1300: Class-2 Serial Data Link Low
- DTC U1301: Class-2 Serial Data Link High
- DTC U2100: Can Bus Communications Malfunction
- DTC U2105: Lost Communication With ECM
- DTC U2106: Lost Communication With TCM
- DTC U2107: Lost Communication With BCM
- System Tests
- Removal & Installation
- Wiring Diagrams
Factory Service Tools
Use the Manual With the Right Hardware
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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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