Power and Ground

PCM Power Relay (Battery Power)
^ If the circuit is open, the engine will not start.
^ If the circuit is shorted, the EGI INJ fuse (3OA) will burn out.

EEC PWR Fuse (PCM Memory Power)
^ If the EEC PWR fuse circuit has an open or short, Diagnostic Trouble Code No.512 is output.
^ If the circuit is open, the PCM 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.

Ground
^ If there is a poor ground, the engine may not start.

STI Terminal (Data Link Connector)
^ If the circuit is open, the Super STAR II Tester cannot perform Diagnostic Trouble Code checks.
^ If the circuit is shorted, the opening amount of the idle air control solenoid will not change, causing hard starting and rough idle.

STO Terminal (Data Link Connector)
^ If the circuit is open, the Super STAR II Tester cannot perform Diagnostic Trouble Code checks.
^ If the circuit is shorted, STO LO will be indicated on the Super STAR II Tester, 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.