2003 Pontiac Sunfire AutomaticFACTORY OEM SERVICE PROCEDURE

DTC B1000: Body Control Module Malfunction: Testing

WARNING: This page is about a different car, the 2002 Pontiac Sunfire, 2002 Chevrolet Cavalier, 2001 Pontiac Sunfire, and 2001 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
  1. If Body Control Module (BCM) diagnostic system check has been performed, go to next step. If BCM diagnostic system check has not been performed, go to BODY CONTROL SYSTEM DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Connect scan tool to Data Link Connector (DLC). DLC is located at lower left side of instrument panel, near steering column. Turn ignition switch to RUN position. Retrieve DTCs. If DTC B1000 is retrieved as current, replace BCM. See BODY CONTROL MODULE  under REMOVAL & INSTALLATION. Program BCM. See BODY CONTROL MODULE PROGRAMMING/REGULAR PRODUCTION OPTION CONFIGURATION  under PROGRAMMING. If DTC B1000 is not retrieved, go to DIAGNOSTIC AIDS  . System is okay at this time.
  3. Using scan tool, clear DTCs. Turn ignition switch to RUN position. Retrieve DTCs. If DTC B1000 is retrieved, go to step  2 . If DTC B1000 is not retrieved, system is okay at this time.
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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.