RAM 1500 Truck 4WD V8-5.9L VIN Z (2002)
Ambient Temperature Sensor / Switch HVAC: Testing and Inspection
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.
