G INSPECTION OF BACK DOOR AND/OR ENGINE HOOD COURTESY SWITCH CIRCUIT. Turn ignition switch off. COMPUTER Disconnect computer connector and inspect connector on wire harness side as follows. INSPECT BACK DOOR COURTESY SWITCH CIRCUIT Close engine hood. * Is there continuity between terminal 1 and ground with back door opened? Yes No Open circuit in back door courtesy switch circuit. INSPECT ENGINE HOOD COURTESY SWITCH CIRCUIT Close back door. Is there continuity between terminal 1 and ground with engine hood opened? Yes No Open circuit in engine hood courtesy switch circuit. Replace computer. *: This circuit includes the diode. If the circuit shows no continuity, change the positive and negative probes and recheck the circuit.