Sensor Resistance Table Volts to Temp to Resistance
Voltage Tech 2 (V) | R Nominal (k ohms) | Outside Air Temp (°F) | Outside Air Temp (°C) |
|---|---|---|---|
4.72-4.74 | 171.6 | -22 | -30 |
4.52-4.54 | 94.63 | -4 | -20 |
4.22-4.25 | 54.21 | 14 | -10 |
3.81-3.85 | 32.00 | 32 | 0 |
3.31-3.34 | 19.61 | 50 | 10 |
2.76-2.79 | 12.31 | 68 | 20 |
2.22-2.25 | 7.959 | 86 | 30 |
1.73-1.75 | 5.268 | 104 | 40 |
1.31-1.34 | 3.563 | 122 | 50 |
0.99-1.01 | 2.458 | 140 | 60 |
The Tech 2 will display sensor value as a voltage. This gives the approximate voltage expected at different ambient temperatures as well as what should be read with an ohmmeter connected to the sensor. Since this is raw data any heat from underhood that changes ambient temp around the sensor might skew the reading, so let the engine compartment cool. | |||
Sensor Resistance Table Inside and Ambient Air Sensor
Temperature | Ambient Air Temperature Sensor Resistance | Inside Air Temperature Sensor Resistance | |||
|---|---|---|---|---|---|
°C | °F | Minimum Resistance K Ohms | Maximum Resistance K Ohms | Minimum Resistance K Ohms | Maximum Resistance K Ohms |
-40 | -40 | 332.4 | 334.7 | 95.80 | 105.6 |
-35 | -31 | 240.3 | 241.8 | 69.09 | 75.81 |
-30 | -22 | 175.6 | 176.6 | 50.34 | 55.00 |
-25 | -13 | 129.6 | 130.3 | 37.04 | 40.29 |
-20 | -4 | 96.55 | 97.07 | 27.51 | 29.80 |
-15 | 5 | 72.63 | 72.99 | 20.61 | 22.24 |
-10 | 14 | 55.12 | 55.38 | 15.57 | 16.74 |
-5 | 23 | 42.20 | 42.38 | 11.86 | 12.70 |
0 | 32 | 32.62 | 32.75 | 9.108 | 9.712 |
5 | 41 | 25.34 | 25.44 | 7.047 | 7.492 |
10 | 50 | 19.86 | 19.94 | 5.494 | 5.825 |
15 | 59 | 15.68 | 15.74 | 4.326 | 4.574 |
20 | 68 | 12.46 | 12.51 | 3.417 | 3.602 |
25 | 77 | 9.98 | 10.02 | 2.73 | 2.870 |
30 | 86 | 8.043 | 8.076 | 2.185 | 2.295 |
35 | 95 | 6.517 | 6.543 | 1.757 | 1.843 |
40 | 104 | 5.309 | 5.33 | 1.425 | 1.494 |
