Operation CHARM: Car repair manuals for everyone.
Hosted by mcallihan.com
Home >> Mazda >> 1995 >> Millenia V6-2255cc 2.3L DOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> Troubleshooting Tips >> Output Devices -- Outline

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 (BAC 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.

PRG 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.

A/C Signal (A/C 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 control 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.

Coolant Fan Relay No.1 and Condenser Fan Relay No.2
- If the circuit is shorted, the coolant fan and condenser fan will always operate while the ignition switch is ON.
- If the circuit is open, the coolant 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.

L/C Atmospheric Balance Air Control Solenoid Valve
- If the solenoid valve or circuit has an open or short, diagnostic trouble code No.PI529 is output.
- If the circuit is open, no symptom will be noticed.
- If the circuit is shorted, may be high oil consumption.
- If the circuit is open, no symptom will be noticed.

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.

Coolant Fan Relay No.2 and No.3
- If the circuit is shorted, the coolant fan will always operate while the ignition switch ON.
- If the circuit is open, the coolant 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.
pro multis · About Operation CHARM