Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1995 Mazda Millenia BaseFACTORY OEM SERVICE PROCEDURE
Engine Controls - Sensor Operating Range Charts - 2.5L: Introduction
Sensor operating range information can help determine if a sensor is out of calibration. An out-of-calibration sensor may not set a trouble code, but it may cause driveability problems.
NOTE:
Unless stated otherwise in test procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
AIRFLOW SENSOR VOLTAGES
| Terminal (1) | Ignition On Volts | Engine Running Volts | ||
|---|---|---|---|---|
| "C" (Power Supply) | 12.0 | 12.0 | ||
| "B" | 1.0-1.5 | 1.5-5.0 | ||
| "A" (Ground) | 0-1 | 0-1 | ||
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AIRFLOW METER TERMINAL RESISTANCE
| Terminals (1) | Fully Closed Ohms | Fully Open Ohms | |||||
|---|---|---|---|---|---|---|---|
| E2 & Vs | 20-600 | 20-1000 | |||||
| E2 & Vc | 200-400 | 200-400 | |||||
| E2 & THA (2) | |||||||
| -4°F (-20°C) | 10,000-20,000 | 10,000-20,000 | |||||
| 68°F (20°C) | 2000-3000 | 2000-3000 | |||||
| 140°F (60°C) | 400-700 | 400-700 | |||||
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ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE
| Temperature | Ohms |
|---|---|
| -4°F (-20°C) | 14,600-17,800 |
| 68°F (20°C) | 2200-2700 |
| 104°F (40°C) | 1000-1300 |
| 140°F (60°C) | 500-650 |
| 176°F (80°C) | 290-350 |
EGR POSITION SENSOR RESISTANCE
| Terminals (1) | Ohms With No No Vacuum Applied | Ohms @ 5.9 in. Hg | ||
|---|---|---|---|---|
| "A" & "B" | 2700 | 2700 | ||
| "A" & "C" | 500 | 2700 | ||
| "B" & "C" | 2400 | 100 | ||
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OXYGEN SENSOR
| Operating Condition | Volts |
|---|---|
| Rapidly Accelerating | 0.5-1.0 |
| Deceleration | 0.0-0.4 |
THROTTLE POSITION SENSOR CONTINUITY
| Condition (1) | Continuity Between Terminals "C" & "D" | |||
|---|---|---|---|---|
| Millenia 2.5L | ||||
| .006" (.15 mm) | Yes | |||
| .020" (.50 mm) | No | |||
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THROTTLE POSITION SENSOR VOLTAGE
| Wire Color To Ground | Closed Throttle Volts | Wide Open Throttle Volts | ||
|---|---|---|---|---|
| Yellow/Red (3F) (1) (Millenia 2.5L) | 0.1-1.0 | 2.8-4.5 | ||
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Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.