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Diagnostic Aids

WARNING: This page is about a different car, the 1998 Pontiac Trans Sport, 1998 Oldsmobile Silhouette, and 1998 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.
  1. The 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).
  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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