Raider V6-3.7L SOHC (2006)
Ambient Temperature Sensor / Switch HVAC: Testing and Inspection
AMBIENT TEMPERATURE SENSOR
The temperature function is supported by the ambient temperature sensor, a wiring circuit, and Front Control Module (FCM). If any portion of the
ambient temperature sensor circuit fails or if Controller Area Network (CAN) Data Bus information is missing, a (- -) will appear in the display in place
of the temperature. When the sensor is exposed to temperatures above 55 degrees C (130 degrees F ), or if the sensor circuit is shorted, 55 degrees C (
130 degrees F ) will appear in the display in place of the temperature, when the sensor is exposed to temperatures below - 40 degrees C (- 40 degrees F
) or if the sensor circuit is open, - 40 degrees C (- 40 degrees F ) will appear in the display.
The ambient temperature sensor circuit can also be diagnosed using the following Sensor Test, and Sensor Circuit Test. If the temperature sensor and
circuit are confirmed to be OK, but the temperature display is inoperative or incorrect, test the compass mini-trip computer.
SENSOR TEST
1. Turn the ignition switch to the Off position. Disconnect and isolate the battery negative cable. Disconnect the ambient temperature sensor harness
connector.
2. Measure the resistance of the ambient temperature sensor. At - 40 degrees C (- 40 degrees F ), the sensor resistance is 336 kilo ohms. At 55
degrees C (130 degrees F ), the sensor resistance is 2.488 kilOhms. The sensor resistance should read between these two values. If OK, refer to
Sensor Circuit Test in this group. If not OK, replace the inoperative ambient temperature sensor.
SENSOR CIRCUIT TEST
For complete circuit diagrams,appropriate to the appropriate-° private wiring information. The wiring information includes wiring diagrams, proper wire
and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire
harness connectors, splices and grounds.
1. Turn the ignition switch to the Off position. Disconnect and isolate the battery negative cable. Disconnect the wire harness connectors from the
ambient temperature sensor and the FCM.
2. Connect a jumper wire between the two terminals in the body half of the ambient temperature sensor harness connector.
3. Check for continuity between the sensor return circuit and the ambient temperature sensor signal circuit cavities of the FCM harness connector.
There should be continuity. If OK, go to Step 4. If not OK, repair the open sensor return circuit or ambient temperature sensor signal circuit to the
ambient temperature sensor as required.
4. Check for continuity between the ambient temperature sensor signal circuit cavity of the FCM harness connector and a good ground. There should
be no continuity. If OK, test the compass mini-trip computer operation. If not OK, repair the shorted ambient temperature sensor signal circuit as
required.
