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Output Devices -- Outline

[Output Device]
Fuel Injector
- If the circuit is open, the fuel injector will not operate, causing rough idle and misfiring.
- If the circuit is shorted, the fuel injector will inject fuel constantly, will not start or hard start.

IGT Signal (Ignition coil)
- If no IGT signal(s) are input to the ignition coil because of an open or short circuit, the cylinder(s) will not start.

Idle Air Control Valve (IAC Valve)
- If the solenoid valve or circuit has an open or short, Diagnostic Trouble Code No.P0505 is output.
- If the circuit is open, the solenoid valve will be fully closed, causing rough idle, engine stalling, and acceleration hesitation when cold.
- If the circuit is shorted, the idle air control valve will be fully opened and the idle speed will be increased, causing hunting.

Fuel Pump Relay
- If the circuit is open, the engine will not start.
- If the circuit is shorted, the fuel pump will operate whenever the ignition switch is ON.

Purge Solenoid Valve
- If the solenoid valve or circuit has an open or short, Diagnostic Trouble Code No.P0443 is output.
- If the circuit is open, no symptom will be noticed.
- If the circuit is shorted, the engine stall or laugh at low speed.
- A short circuit may cause an improper air/fuel ratio, causing rough idle and hard starting.

NC Signal (NC Relay)
- If the circuit is open, the air conditioner will not operate.
- If the circuit is shorted, the air conditioner will constantly operate when ignition switch ON.

Torque Reduction Inhibit Signal (ABS/TCS Control Unit)
- If the circuit is open or shorted, the traction control will not operate.

EGR Solenoid Valve (Vent)
- If the solenoid valve or circuit has an open or short, Diagnostic Trouble Code No.P1486 is output.
- If the circuit is open or shorted, no symptom will be noticed.

EGR Solenoid Valve (Vacuum)
- If the solenoid valve or circuit has an open or short, Diagnostic Trouble Code No.P1485 is output.
- If the circuit is shorted, the EGR valve will remain open, causing engine stalling and hard starting.
- If the circuit is open, no symptom will be noticed.

PRC Solenoid Valve
- If the solenoid valve or circuit has an open or short, Diagnostic Trouble Code No.P1250 is output.
- If the circuit is shorted, no symptom will be noticed.
- If the circuit is open, the engine will be hard to start when hot.

Condenser Fan Relay No.1
- If the circuit is shorted, the condenser fan and coolant fan will always operate while the ignition switch is ON.
- If the circuit is open, the condenser fan will not operate.

Cooling Fan Relay No.1 and Condenser Fan Relay No.2
- If the circuit is shorted, the cooling fan and condenser fan will always operate while the ignition switch is ON.
- If the circuit is open, the cooling fan will remain OFF when the engine temperature exceeds 108°C (226°F).

ABV Solenoid Valve (Vacuum)
- If the solenoid valve or circuit has an open or short, diagnostic trouble code No.P1525 is output.
- If the circuit is open, no symptom will be noticed.
- If the circuit is shorted, the ABV actuator is not controlled causing poor acceleration or lack of power.

ABV Solenoid Valve (Vent)
- If the solenoid valve or circuit has an open or short, diagnostic trouble code No.P1526 is output.
- If the circuit is open, no symptom will be noticed.
- If the circuit is shorted, the ABV actuator is not controlled causing poor acceleration or lack of power.

Charge Air Cooler Bypass Solenoid Valve
- If the solenoid valve or circuit has an open or short, diagnostic trouble code No.P1524 is output.
- If the circuit is open, no symptom will be noticed.
- If the circuit is shorted, the charge air cooler bypass valve always closed, the air charging pressure control is not controlled, causing poor acceleration, lack of power or knocking.

MAP Sensor Solenoid Valve
- If the solenoid valve or circuit has an open or short, diagnostic trouble code No.P1487 is output.
- If the circuit is open, ECM can not detect the manifold pressure, causing poor acceleration or lack of power.
- If the circuit is shorted, no symptom will be noticed.

Bypass Air Solenoid Valve No.1
- If the solenoid valve or circuit has an open or short, diagnostic trouble code No.P1508 is output.
- If the circuit is open, lack of air amount for starting when engine is very cold, causing hard to start. If the circuit is shorted, high idle speed after warm-up.

Bypass Air Solenoid Valve No.2
- If the solenoid valve or circuit has an open or short, diagnostic trouble code No.P1509 is output.
- If the circuit is open, lack of air amount for starting when engine is vary cold, causing hard to start.
- If the circuit is shorted, high idle speed after warm-up.

Fuel Pump Resistor and Relay (Speed)
- If the circuit is shorted, the fuel pump does not operate at high speed causing poor acceleration or lack of power when heavy duty driving.
- If the circuit is open, fuel pump does not operate, causing engine will not start.

Cooling Fan Relay No.2 and No.3
- If the circuit is shorted, the cooling fan will always operate while the ignition switch ON.
- If the circuit is open, the cooling fan will remain OFF when water temperature exceeds 108°C (226°F).

High Air Charging Pressure Zone Signal
- If the circuit is open, torque reduction control will not operate.
- If the circuit is shorted, always operates torque reduction control, causing poor acceleration or lack of power.
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