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Home >> Mazda >> 1995 >> Millenia V6-2496cc 2.5L DOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> Troubleshooting Tips >> Output Devices -- Outline
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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 Control Module)
- If no IGT signals are input to the ignition control module because of an open or short circuit, the engine 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 idle air control 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 at low speed.
- A short circuit may cause an improper air/fuel ratio, causing rough idle and hard starting.

VRIS Solenoid Valve No.1
- If the solenoid valve or circuit has an open or short, Diagnostic trouble code No.P1521 is output.
- If the circuit is open, the solenoid valve will stay OFF and the shutter valves will stay closed, causing a poor acceleration or lack of power.
- If the circuit is shorted the solenoid valve will stay ON and the shutter valves will stay open, causing a poor acceleration or lack of power.

VRIS Solenoid Valve No.2
- If the solenoid valve or circuit has an open or short, Diagnostic trouble code No.P1522 is output.
- If the circuit is open, the solenoid valve will stay OFF and the shutter valves will stay closed, causing a poor acceleration or lack of power.
- If the circuit is shorted, the solenoid valve will stay ON and the shutter valves will stay open, causing a poor acceleration or lack of power.

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 the ignition switch is ON.

Torque Reduced Signal (TCM)
- If a malfunction occurs in the reduction executed signal, the torque reduction control system is inhibited and the line pressure characteristics will be high shifting. Shift shock may be slightly increased.

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.P1486 is output.
- If the circuit is open or shorted, no symptom will be noticed.

EGR Boost 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 or shorted, 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.

Condenser Fan Relay No.2 and Coolant Fan Relay
- 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 not operate.
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