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.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE
| Temperature - °F (°C) | Ohms |
|---|---|
| -4 (-20) | 10,000-20,000 |
| 32 (0) | 4000-7000 |
| 68 (20) | 2000-3000 |
| 104 (40) | 900-1300 |
| 140 (60) | 400-700 |
| 176 (80) | 200-400 |
EGR TEMPERATURE SENSOR RESISTANCE
| Temperature - °F (°C) | Ohms |
|---|---|
| 122 (50) | 69,000-88,000 |
| 212 (100) | 11,000-15,000 |
| 302 (150) | 2000-4000 |
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE
| Temperature - °F (°C) | Ohms |
|---|---|
| -4 (-20) | 10,000-20,000 |
| 32 (0) | 4000-7000 |
| 68 (20) | 2000-3000 |
| 104 (40) | 900-1300 |
| 140 (60) | 400-700 |
| 176 (80) | 200-400 |
Manifold Absolute Pressure (MAP) Sensor
For information on MAP sensor, see ENGINE SENSORS & SWITCHES in I - SYS/COMP TESTS article in the ENGINE PERFORMANCE Section.
THROTTLE POSITION (TP) SENSOR RESISTANCE
| Application | Ohms | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Between Terminals E2 & IDL (3) | 0-2300 | ||||||||
| Between Terminals E2 & IDL (1) | Infinity | ||||||||
| Between Terminals E2 & VC | 4000-8500 | ||||||||
| Between Terminals E2 & VTA (4) | 200-6000 | ||||||||
| Between Terminals E2 & VTA (2) | 3300-10,000 | ||||||||
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Vehicle Speed Sensor
For information on vehicle speed sensor, see ENGINE SENSORS & SWITCHES in I - SYS/COMP TESTS article in the ENGINE PERFORMANCE Section.