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HOMESERVICE MANUALSPONTIAC1997GRAND PRIX GTP, 4D SEDANREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 7 (BODY CONTROL MODULE)DIAGNOSIS & REPAIRBCM DIAGNOSTIC SYSTEM CHECKDIAGNOSTIC AIDS
1997 Pontiac Grand Prix GTP, 4D Sedan

Diagnostic Aids

1997 Pontiac Grand Prix GTP, 4D SedanSECTION Diagnostic Aids
WARNING: This page is about a different car, the 1997 Buick Regal and 1997 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
  1. Following conditions may result in intermittent operation of BCM with no DTC stored:
    • Any condition which results in interruption of power to BCM.
    • Out of range battery or ignition voltage (normal BCM operating voltage is 9-16 volts).
    • Loose or damaged ground(s).
    • Open or shorted serial data line.
  2. BCM tests for different malfunctions during different vehicle conditions. A thorough test drive may be necessary to repeat malfunction. Most intermittent problems are caused by faulty electrical connections or wiring. Check for: poor connections, backed-out terminals, dirty or corroded terminals, chafed wires, or damaged connectors.
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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.