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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSBUICK1998REGAL 25TH ANNIVERSARY EDITIONREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEBODY, CAB CONTROL SYSTEMSBODY CONTROL MODULE
1998 Buick Regal 25th Anniversary Edition
Body Control Module
1998 Buick Regal 25th Anniversary EditionSECTION Body Control Module
- Description & Operation
- Component Locations
- BCM Programming
- Self-Diagnostic System
- Diagnostic Tests
- Notes
- Data Link Connector (DLC) Diagnostic System Check
- Scan Tool Does Not Communicate With Class 2 Data Line
- BCM Diagnostic System Check
- Performance Shift Switch Malfunction
- DTC B0603: BCM Internal Memory Malfunction (Write Error)
- DTC B0605: BCM Internal Memory Malfunction (Checksum Error)
- DTC B0608: BCM Power MODING Error
- DTC B0702: Rap Relay Circuit (Short To Ground Or Open)
- DTC B0703: Rap Relay Circuit (Short To Voltage)
- DTC B0807: Battery For Door Lock Circuit (Open)
- DTC B0812: Courtesy Lights Battery Feed Circuit (Open)
- DTC B0823: Door Lock Actuator Ground Feed Circuit (Open)
- DTC B0828: Theater Dimming Ground Circuit (Open)
- DTC B1802: Courtesy Lights Circuit (Short To Ground)
- DTC B2202: Driver's Door Unlock Circuit (Short To Ground Or Open)
- DTC B2203: Driver's Door Unlock Circuit (Short To Voltage)
- DTC B2403: FOGLIGHT Switch Circuit (Short To Voltage)
- DTC B2417: DRL Control Module Circuit (Short To Ground Or Open)
- DTC B2418: DRL Control Module Circuit (Short To Voltage)
- DTC B2452: Theater Dimming No. 1 Circuit (Short To Ground Or Open)
- DTC B2453: Theater Dimming No. 1 Circuit (Short To Voltage)
- DTC B2457: Theater Dimming No. 2 Circuit (Short To Ground Or Open)
- DTC B2458: Theater Dimming No. 2 Circuit (Short To Voltage)
- DTC B2528: Horn Relay Circuit (Short To Voltage)
- DTC B2721: Pass-Key(R) II Detection Circuit (Out Of Range)
- DTC B2722: Pass-Key(R) II Detection Circuit (Short To Ground)
- DTC B2723: Pass-Key(R) II Detection Circuit (Short To Voltage Or Open)
- DTC B2735: Pass-Key(R) II Programming Mode Active
- DTC B2739: Key-In-Ignition Fault
- DTC B2802: RFA Link Circuit (Short To Ground)
- DTC B2803: RFA Link Circuit (Short To Voltage)
- DTC B2805: RFA Programming/Diagnostic Mode Message Not Received
- DTC B2806: RFA Link Parity Error
- DTC U1016: Pcm Class 2 Source Id 10
- DTC U1040: EBTCM Class 2 Source Id 28
- DTC U1064: Loss Of BCM Source Id 40
- DTC U1096: Instrument Panel Class 2 Source Id 60
- DTC U1255: Loss Of Class 2 Serial Data Fault (General)
- DTC U1300: Class 2 Circuit (Short To Ground)
- DTC U1301: Class 2 Circuit (Short To Voltage)
- Removal & Installation
- Wiring Diagrams
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.