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 |
|---|
| 266 (130) | 70 |
| 212 (100) | 177 |
| 194 (90) | 241 |
| 176 (80) | 332 |
| 158 (70) | 467 |
| 140 (60) | 667 |
| 122 (50) | 973 |
| 113 (45) | 1188 |
| 104 (40) | 1459 |
| 95 (35) | 1802 |
| 86 (30) | 2238 |
| 77 (25) | 2796 |
| 68 (20) | 3520 |
| 59 (15) | 4450 |
| 50 (10) | 5670 |
| 41 (5) | 7280 |
| 32 (0) | 9420 |
| 23 (-5) | 12,300 |
| 14 (-10) | 16,180 |
| 5 (-15) | 21,450 |
| 4 (-20) | 28,680 |
| 22 (-30) | 52,700 |
| 22 (-30) | 52,700 |
| 40 (-40) | 100,700 |
| (1) (ECT) Engine Coolant Temperature. (2) (DFT) Diesel Fuel Temperature. (3) (IAT) Intake Air Temperature. (4) Measure resistance across sensor terminals. |
| (1) | (ECT) Engine Coolant Temperature. |
| (2) | (DFT) Diesel Fuel Temperature. |
| (3) | (IAT) Intake Air Temperature. |
| (4) | Measure resistance across sensor terminals. |
ECT (1) , DFT (2) & IAT (3) SENSOR RESISTANCE VALUES (4)
| Throttle Position | Volts |
|---|
| At Idle | 1.0-1.5 |
| Wide Open Throttle | 4.0-4.6 |
| (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)
