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. Unless stated otherwise in test procedure, perform all voltage tests with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
| Temperature °F (°C) | Ohms |
|---|
| 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 |
| 40 (-40) | 100,700 |
| (1) Measure resistance across sensor terminals. |
| (1) | Measure resistance across sensor terminals. |
COOLANT TEMPERATURE SENSOR RESISTANCE TEST (1)
| Altitude Feet | Volts |
|---|
| Below 1000 | 3.8-5.5 |
| 1000-2000 | 3.6-5.3 |
| 2000-3000 | 3.5-5.1 |
| 3000-4000 | 3.3-5.0 |
| 4000-5000 | 3.2-4.8 |
| 5000-6000 | 3.0-4.6 |
| 6000-7000 | 2.9-4.5 |
| 7000-8000 | 2.8-4.3 |
| 8000-9000 | 2.6-4.2 |
| 9000-10,000 | 2.5-4.0 |
| (1) Measured at sensor or as seen on scan tester. |
| (1) | Measured at sensor or as seen on scan tester. |
MAP SENSOR VOLTAGE TEST (1)
| Temperature °F (°C) | Ohms |
|---|
| 212 (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. |
MANIFOLD AIR TEMPERATURE SENSOR RESISTANCE TEST (1)
| Temperature °F (°C) | Ohms |
|---|
| 212 (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. |
OIL TEMPERATURE SENSOR RESISTANCE TEST (CORVETTE) (1)
| Condition | Volt |
|---|
| Lean | .1 |
| Rich | .9 |
| (1) Measure voltage between O2 sensor ground and signal terminals at ECM. |
| (1) | Measure voltage between O2 sensor ground and signal terminals at ECM. |
OXYGEN SENSOR VOLTAGE TEST (1)
