Output Devices

Fuel Injector
^ If the circuit is open, the fuel injector will not operate, causing rough idle, hard starting and poor acceleration.
^ If the circuit is shorted, the fuel injector will inject fuel constantly, causing hard starting, engine rough or stall, and poor acceleration.

IGT Signal (Ignition control module)
^ If no IGT signals are input to the ignition control module because of an open or short circuit, the engine will stall and will not restart, and the tachometer will not operate.

Idle Air Control Valve (IN BAC Valve)
^ If the valve or circuit has an open or short, Diagnostic Trouble Code No.34 will be output.
^ If the circuit is open, the valve will be in the closed throttle position, causing hard starting, engine stalling, or engine rough at driveaway when engine is cold.
^ If the circuit is shorted, the valve will be in the wide open throttle position and the idle speed will stay or fluctuate at approx. 2,000 rpm.

Fuel Pump Relay
^ If the circuit is open, the engine will stall and will not restart.
^ If the circuit is shorted, the fuel pump will operate whenever the ignition switch is ON.

Purge Solenoid Valve
^ If the solenoid valve has an open or short circuit, Diagnostic Trouble Code No.26 will be output.
^ If the circuit is open or shorted, no symptom will be noticed.
^ A short circuit may cause an improper air/fuel ratio, causing engine stalling, poor acceleration idle and hard starting.

A/C Signal (A/C Relay) and Condenser Fan Relay
^ If the circuit is open, the air conditioner will not operate.
^ If the circuit is shorted, the air conditioner will constantly operate when the blower is ON.

EGR Solenoid Valve (Vacuum)
^ If the solenoid valve has an open or short circuit, Diagnostic Trouble Code No.28 will be output.
^ If the circuit is open or shorted, no symptom will be noticed.

EGR Solenoid Valve (Vent)
^ If the solenoid valve has on open short circuit, Diagnostic Trouble Code No.29 will be output.
^ If the circuit is open or shorted, no symptom will be noticed.

PRC Solenoid Valve
^ If the solenoid valve has an open or short circuit, Diagnostic Trouble Code No.25 will be output.
^ If the circuit is shorted, no symptom will be noticed.
^ If the circuit is open, the engine will be hard to start after being heat-soaked.

Coolant Fan Relay No.1
^ If the relay has an open or short circuit, Diagnostic Trouble Code No.67 will be output.
^ If the circuit is shorted, the coolant fan will always operate while the ignition switch is ON.
^ If the circuit is open, the coolant fan will remain OFF when the water temperature exceeds 97°C (207°F).

Coolant Fan Relay No.2
^ If the relay has an open or short circuit, Diagnostic Trouble Code No.68 will be output.
^ If the circuit is shorted, the coolant fan will always operate with the ignition switch ON.
^ If the circuit is open, the coolant fan will remain OFF when the engine temperature exceeds 108°C (226°F).

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 buzzer will not sound during the diagnostic trouble code check.
^ If the circuit is shorted, code "88" will keep flashing and the buzzer will continue sounding, preventing a diagnostic trouble code check.