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.
1994 Mazda B2300 SE, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Controls - Sensor Operating Range Charts: 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.
AIR CHARGE TEMPERATURE (ACT) SENSOR RESISTANCE
| Temperature | Ohms |
|---|---|
| 50°F (10°C) | 58,750 |
| 68°F (20°C) | 37,300 |
| 176°F (80°C) | 384 |
| 194°F (90°C) | 280 |
ECT SENSOR RESISTANCE
| Temperature | Ohms |
|---|---|
| 50°F (10°C) | 58,750 |
| 68°F (20°C) | 37,300 |
| 176°F (80°C) | 384 |
| 194°F (90°C) | 280 |
OXYGEN SENSOR
| Operating Condition | Voltage |
|---|---|
| Rapidly Accelerating | 0.5-1.0 |
| Deceleration | 0.0-0.4 |
TP SENSOR VOLTAGE
| Application | (1) Voltage | ||
|---|---|---|---|
| Closed Throttle | .60 | ||
| Wide Open Throttle | 4.50 | ||
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Factory Service Tools
Use the Manual With the Right Hardware
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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.