Sensor Operating Range Charts
NOTE:
Unless stated otherwise, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE
| Temperature - °F (°C) |
Ohms |
| -4 (-20) |
15,000-18,000 |
| 68 (20) |
2500-3500 |
| 176 (80) |
400-600 |
| 212 (100) |
250-350 |
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE
| Temperature - °F (°C) |
Ohms |
| -4 (-20) |
15,000-18,000 |
| 68 (20) |
2500-3500 |
| 176 (80) |
400-600 |
| 212 (100) |
250-350 |
MAP SENSOR VOLTAGE
| Vacuum Applied - In. Hg |
Volts |
| 0 |
2.8-3.0 |
| 5 |
2.3-2.5 |
| 10 |
1.8-2.0 |
| 15 |
1.3-1.5 |
| 20 |
0.8-1.0 |
| 25 |
0.3-0.5 |
THROTTLE POSITION (TP) SENSOR VOLTAGE
| Position |
Approximate Volts |
| Fully Closed |
0.5 |
| 1/2 Throttle |
2.3-2.7 |
| Fully Open |
4.5 |