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.
2002 Chevrolet Astro Van Cargo, AWDFACTORY OEM SERVICE PROCEDURE
Section 16 (Body Control Modules)
WARNING: This page is about a different car, the 2001 GMC Safari and 2001 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
- Description & Operation
- Component Locations
- Programming
- Notes
- Body Control Module
- Body Control Module Programming - Regular Production Option Configuration
- PASSLOCK(tm) LEARN PROCEDURE
- Compass Calibration/Variance Procedure
- Powertrain Control Module/Programming On Board
- Powertrain Control Module/Programming Off Board
- Crankshaft Position Sensor Variation Learn Procedure
- Radio Anti-Theft Feature (THEFTLOCK(R)) Activating
- Radio Anti-Theft Feature (THEFTLOCK(R)) Unlocking
- Radio Anti-Theft Feature (THEFTLOCK(R)) Disabling
- Trouble Shooting
- INTERMITTENTS
- Self-Diagnostic System
- Notes
- Air Bag System Diagnostic System Check
- Anti-Lock Brake System Diagnostic System Check
- Audible Warnings Diagnostic System Check
- Automatic Transmission Powertrain On Board Diagnostic System Check
- Body Control Module Diagnostic System Check
- Cruise Control Diagnostic System Check
- Door Systems Diagnostic System Check
- Engine CONTROLSDIAGNOSTIC System Check
- Engine Cooling Diagnostic System Check
- Engine Electrical Diagnostic System Check
- Horns System Diagnostic System Check
- Instrument Panel Cluster Diagnostic System Check
- Lighting Systems Diagnostic System Check
- Remote Keyless Entry Diagnostic System Check
- Retained Accessory Power Diagnostic System Check
- Theft Deterrent Diagnostic System Check
- Transfer Case Diagnostic System Check
- Scan Tool Diagnostics
- Diagnostic Trouble Code Definitions
- Diagnostic Tests
- DTC B1000: Body Control Module Internal Malfunction
- DTC B1397: Device Voltage Reference Out No. 1 Circuit Low
- DTC B1398: Device Voltage Reference Out No. 1 Circuit High
- DTC B1477: Retained Accessory Power (Rap) Circuit Low
- DTC B1478: Retained Accessory Power (Rap) Circuit High
- DTC B1480: Battery Rundown Protection Circuit Malfunction
- DTC U1000 & U1255: Class 2 Communication Malfunction
- DTC U1001 & U1254: Loss Of XXX Communications
- DTC U1300: Class 2 Serial Data Link Low
- DTC U1301: Class 2 Serial Data Link High
- System Tests
- Removal & Installation
- Wiring Diagrams
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.