Ambient Temperature Sensor Test
- Turn the ignition OFF.
- Disconnect the ATS harness connector.
- Measure the resistance of the ATS using the following min/max values:
- 0°C (32°F) Sensor Resistance = 29.33 - 35.99 Kilohms.
- 10°C (50°F) Sensor Resistance = 17.99 - 21.81 Kilohms
- 20°C (68°F) Sensor Resistance = 11.37 - 13.61 Kilohms.
- 25°C (77°F) Sensor Resistance = 9.12 - 10.86 Kilohms.
- 30°C (86°F) Sensor Resistance = 7.37 - 8.75 Kilohms.
- 40°C (104°F) Sensor Resistance = 4.90 - 5.75 Kilohms.
The sensor resistance should read between these min/max values. If the resistance values are not OK, replace the sensor.