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.
1998 Cadillac CateraFACTORY OEM SERVICE PROCEDURE
Body Control Module
- Description & Operation
- Component Locations
- Programming
- Self-Diagnostics
- Diagnostic Tests
- Notes
- BCM System Check
- DTC U1128: Loss Of Serial Communications - IRC
- DTC U1255: Generic Loss Of Class 2 Devices
- DTC U1300: Class 2 Short To Ground
- DTC U1301: Class 2 Short To Battery
- DTC B1552: Loss Of BCM Keep Alive Memory (KAM)
- DTC B1556: BCM EEPROM Write Error
- DTC B1558: BCM EEPROM Checksum Error
- DTC B1970: Exterior Light Power Fault
- DTC B1971: Inadvertent Power Fault
- DTC B1972: Low Power Driver Fault
- DTC B1973: High Power Control Fault
- DTC B1982: Battery Voltage Too High
- DTC B1983: Battery Voltage Too Low
- DTC B2470: Daytime Running Lights Fault
- DTC B2471: Interior Lights Fault
- DTC B2472: Low Beam Output Fault
- DTC B2473: High Beam Fault
- DTC B2476: Parking Lights Output Fault
- 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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