Sensor Operating Range Charts
NOTE:
Unless stated otherwise in test procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE
| Temperature °F (°C) |
Ohms |
| 32 (0) |
5000-8000 |
| 50 (10) |
3000-5000 |
| 68 (20) |
2000-3000 |
| 86 (30) |
1500-2000 |
| 104 (40) |
1000-1500 |
| 122 (50) |
700-1000 |
| 140 (60) |
600-800 |
| 158 (70) |
300-600 |
| 176 (80) |
260-400 |
EGR TEMPERATURE SENSOR RESISTANCE (4.0L)
| Temperature °F (°C) |
Ohms |
| 212 (100) |
60,000-100,000 |
| 302 (150) |
15,000-25,000 |
| 392 (200) |
3000-8000 |
| 482 (250) |
1500-2500 |
| 572 (300) |
400-1000 |
| 662 (350) |
250-350 |
HEATED OXYGEN SENSOR VOLTAGE (4.0L)
| Condition |
Volts |
| Lean |
0.2 |
| Rich |
4.8 |
HEATED OXYGEN SENSOR VOLTAGE (6.0L)
| Condition |
Volts |
| Lean |
.1 |
| Rich |
.9 |
INTAKE AIR TEMPERATURE SENSOR RESISTANCE
| Temperature °F (°C) |
Ohms |
| 32 (0) |
5000-8000 |
| 50 (10) |
3000-5000 |
| 68 (20) |
2000-3000 |
| 86 (30) |
1500-2000 |
| 104 (40) |
1000-1500 |
| 122 (50) |
700-1000 |
| 140 (60) |
600-800 |
| 158 (70) |
300-600 |
| 176 (80) |
260-400 |
MASS AIRFLOW SENSOR VOLTAGE (4.0L)
| Condition |
Volts |
| 700 RPM |
1.30 |
| 1500 RPM |
1.70 |
| 3000 RPM |
2.30 |