Diagnostic Aids

Following conditions may result in intermittent operation of IPC with no DTC stored:

• Any condition which results in interruption of power to IPC.
• Out of range battery or ignition voltage (normal operating voltage is 9-16 volts).
• Loose or damaged ground(s).
• Open or shorted serial data line.

IPC 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.