Blow warm air into the in-car sensor air inlet. Measure sensor resistance between 2 and 4 terminals.
Courtesy of HYUNDAI MOTOR AMERICA TEMPERATURE SPECIFICATION
| Temperature [°C(°F)] |
Resistance between terminals 2 and 4 (kΩ) |
| 60(140) |
7.463 ± 2.6% |
| 50(122) |
10.810 ± 2.2% |
| 35(95) |
19.59 ± 1.6% |
| 25(77) |
30.00 ± 1.2% |
| 15(59) |
47.130 ± 1.7% |
| 0(32) |
97.710 ± 2.4% |
| -15(5) |
216.1 ± 3.2% |
| -30(-22) |
509.6 ± 4.1% |
NOTE:
In car sensor is negative type thermistor that resistance will rise with lower temperature, and reduce with higher temperature.