Ambient Temperature Sensor Test

1. Turn the ignition OFF.
2. Disconnect the ATS harness connector.
3. 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.