RAM 3500 Truck 2WD V8-5.7L VIN D (2003)
Ambient Temperature Sensor / Switch HVAC: Testing and Inspection
Ambient Temperature Sensor Test
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.
