Sensor Resistance Table Inside Air Temperature Sensor
°C / °F | Inside Resistance (ohms) |
|---|---|
Temperature vs. Resistance Values-Approximate | |
-40 | 100560.0 ohms |
-30 / -22 | 52432 ohms |
-20 / -4 | 28496 ohms |
-10 / 14 | 16064 ohms |
0 / 32 | 9366 ohms |
10 / 50 | 5640 ohms |
20 / 68 | 3499 ohms |
30 / 86 | 2232 ohms |
40 / 104 | 1460 ohms |
50 / 122 | 977.1 ohms |
60 / 140 | 668.8 ohms |
70 / 158 | 467.4 ohms |
80 / 176 | 332.8 ohms |
Sensor Resistance Table Upper and Lower Duct Temp Sensors
°C / °F | Duct Temperature Sensor Resistance (ohms) |
|---|---|
-40 / -40 | 100.86 K |
-30 / -22 | 52.59 K |
-20 / -4 | 28.58 K |
-10 / 14 | 16.12 K |
0 / 32 | 9.39 K |
10 / 50 | 5.66 K |
20 / 68 | 3.51 K |
30 / 86 | 2.24 K |
40 / 104 | 1.47 K |
50 / 122 | 9.8 K |
60 / 140 | 6.7 K |
70 / 158 | 4.7 K |
80 / 176 | 3.34 K |
Sensor Resistance Table Duct Temp conversion temp to counts
°C / °F | Counts |
|---|---|
-40 / -40 | 248 |
-30 / -22 | 242 |
-20 / -4 | 232 |
-10 / 14 | 217 |
0 / 32 | 196 |
10 / 50 | 171 |
20 / 68 | 142 |
30 / 86 | 113 |
40 / 104 | 88 |
50 / 122 | 66 |
60 / 140 | 49 |
70 / 158 | 37 |
80 / 176 | 27 |
Sensor Resistance Table Ambient Air Temp Sensor
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.
Voltage Tech 2 (V) | R Nominal (k ohms) | Outside Air Temp (°F) | Outside Air Temp (°C) |
|---|---|---|---|
-- | Input OPEN or SHORT to battery | -- | -- |
4.7 | 169.4 | -40 | -40 |
4.5 | 88.74 | -22 | -30 |
4.1 | 48.58 | -4 | -20 |
3.7 | 27.67 | 14 | -10 |
3.1 | 16.33 | 32 | 0 |
2.5 | 9.951 | 50 | 10 |
1.9 | 6.246 | 68 | 20 |
1.4 | 4.028 | 86 | 30 |
1.0 | 2.663 | 104 | 40 |
0.7 | 1.801 | 122 | 50 |
0.5 | 1.245 | 140 | 60 |
0.4 | 0.8772 | 158 | 70 |
-- | Input SHORT to ground | -- | -- |
