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 will cause driveability problems.
Note. Perform all voltage tests with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in testing procedures.
| °F (°C) | Ohms |
|---|
| 212 (100) | 177 |
| 158 (70) | 467 |
| 100 (38) | 1800 |
| 68 (20) | 3520 |
| 23 (-5) | 12,300 |
| 0 (-18) | 25,000 |
| 40 (-40) | 100,700 |
| (1) Measure resistance across sensor terminals. |
| (1) | Measure resistance across sensor terminals. |
ENGINE COOLANT TEMPERATURE RESISTANCE VALUES (1)
| °F (°C) | Ohms |
|---|
| 212 (100) | 177 |
| 158 (70) | 467 |
| 100 (38) | 1800 |
| 68 (20) | 3520 |
| 23 (-5) | 12,300 |
| 0 (-18) | 25,000 |
| 40 (-40) | 100,700 |
| (1) Measure resistance across sensor terminals. |
| (1) | Measure resistance across sensor terminals. |
DIESEL FUEL TEMPERATURE RESISTANCE VALUES (1)
| °F (°C) | Ohms |
|---|
| 210 (100) | 185 |
| 160 (70) | 450 |
| 100 (38) | 1800 |
| 70 (20) | 3400 |
| 40 (4) | 7500 |
| 20 (-7) | 13,500 |
| 0 (-18) | 25,000 |
| 40 (-40) | 100,700 |
| (1) Measure resistance across sensor terminals. |
| (1) | Measure resistance across sensor terminals. |
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE VALUES (1)
| Throttle Position | Volts |
|---|
| At Idle | 1.0-2.0 |
| Wide Open Throttle | 4.0-4.8 |
| (1) Measured at sensor, or as seen on scan tester. Ensure sensor output changes instantly when intake manifold vacuum is applied and released. |
| (1) | Measured at sensor, or as seen on scan tester. Ensure sensor output changes instantly when intake manifold vacuum is applied and released. |
MAP SENSOR VOLTAGE RANGE (1)
| Condition | Volts |
|---|
| Lean | .1 |
| Rich | .9 |
| (1) Measure voltage between oxygen sensor ground and signal terminals at PCM. |
| (1) | Measure voltage between oxygen sensor ground and signal terminals at PCM. |
OXYGEN SENSOR VOLTAGE TEST (1)
