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Home >> Chrysler >> 2005 >> PT Cruiser Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 123 (Message Systems) >> Ambient Temperature Sensor >> Diagnosis And Testing >> Diagnosis And Testing - Ambient Temperature Sensor >> Sensor Circuit Testing
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Sensor Circuit Testing

WARNING: This page is about a different car, the 2005 Dodge SX, 2005 Dodge SRT-4, and 2005 Dodge Neon. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn the ignition switch to the OFF position. Disconnect and isolate the battery negative cable. Disconnect the ambient temperature sensor wire harness connector and the NGC engine controller wire harness connector.
  2. Connect a jumper wire between the two terminals in the body half of the ambient temperature sensor wire harness connector.
  3. Check for continuity between the sensor return circuit and the ambient temperature sensor signal circuit cavities of the NGC engine controller wire 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. Remove the jumper wire from the body half of the ambient temperature sensor wire harness connector. Check for continuity between the sensor return circuit cavity of the NGC engine controller wire harness connector and a good ground. There should be no continuity. If OK, replace the compass/temperature display unit. If not OK, repair the shorted sensor return circuit as required.
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