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 929FACTORY 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.
AIRFLOW MTR TERM RESISTANCE
| Terminals (1) | Temperature | Ohms | |||||||
|---|---|---|---|---|---|---|---|---|---|
| E2 & Vs | |||||||||
| Closed | 68°F (20°C) | 20-600 | |||||||
| Open | 68°F (20°C) | 20-1000 | |||||||
| E2 & Vc (2) | 68°F (20°C) | 200-400 | |||||||
| E2 & THA (3) | -4°F (-20°C) | 10,000-20,000 | |||||||
| 68°F (20°C) | 2000-3000 | ||||||||
| 140°F (60°C) | 400-700 | ||||||||
|
|||||||||
COLD START THERMOSWITCH RESISTANCE
| Temperature | Ohms |
|---|---|
| 68°F (20°C) | 25-35 |
| 176°F (80°C) | 64-76 |
ECT SENSOR RESISTANCE
| Temperature | Ohms |
|---|---|
| -4°F (-20°C) | 14,600-17,800 |
| 68°F (20°C) | 2200-2700 |
| 176°F (80°C) | 280-350 |
EGR POSITION SENSOR RESISTANCE
| Terminals | Ohms |
|---|---|
| "A" & "B" | 700-5000 |
| "A" & "C" | 700-5000 |
| "B" & "C" | 5000 |
INTAKE AIR THERMOSENSOR RESISTANCE
| Application | Ohms |
|---|---|
| 77°F (25°C) | 29,700-36,300 |
| 185°F (85°C) | 3300-3700 |
OXYGEN SENSOR
| Operating Condition | Voltage |
|---|---|
| Rapidly Accelerating | 0.5-1.0 |
| Deceleration | 0.0-0.4 |
TP SENSOR RESISTANCE
| Application | Ohms | |
|---|---|---|
| Between Terminals "A" & "D" | 3000-6000 | |
| Between Terminals "B" & "D" | ||
| Closed Throttle | 200-600 | |
| Wide Open Throttle | 3300-7000 | |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.