Power and Ground

Main Relay (Battery Power)
^ If the circuit is open, the engine will not start.
^ If the circuit is shorted, the EGI INJ fuse (30A) will burn out.

Room Fuse (ECM Memory Power)
^ If the circuit is open, the ECM memory function will not operate, and diagnostic trouble codes for intermittent malfunctions will not be indicated. Also, the learning control will be canceled, but will not produce any particular symptom.
^ If the circuit is shorted, the ROOM fuse (15A) will burn out.

Ground (Output Devices Fuel Injector)
^ If an output device or a fuel injector has an open ground circuit, no particular symptom will be produced. If a related output device and fuel injectors both have open ground circuits, the engine will not start.

Ground (System-Analogue)
^ An open circuit will not produce any symptom.

TEN Terminal (Data Link Connector)
^ If the circuit is open, the Self-Diagnosis Checker cannot perform diagnostic trouble code checks and switch monitoring checks.
^ If the circuit is shorted, the opening amount of the idle air control valve will not change, causing hard starting and rough idle. The ignition timing will be fixed, causing lack of power and poor acceleration. The Self-Diagnosis Checker cannot perform sensor monitoring checks.
^ If the circuit is shorted, the coolant fan operates whenever the throttle valve is opened.

MEN Terminal (Data Link Connector)
^ If the circuit is open, the Self-Diagnosis Checker monitor lamp will not illuminate.
^ If the circuit is shorted, the Self-Diagnosis Checker monitor lamp will stay on.

FEN Terminal (Data Link Connector)
^ If the circuit is open, the Self-Diagnosis Checker can not perform the diagnostic trouble code check.
^ If the circuit is shorted, code "88" will keep flashing, preventing a diagnostic trouble code check.

Malfunction Indicator Lamp (MIL)
^ If the circuit is open, the MIL will not illuminate with the ignition switch ON.
^ If the circuit is shorted, the MIL will not go off after the engine is started.