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OUTSIDE TEMPERATURE The Compass/Temp Mirror utilizes vehicle speed and engine temperature data received on the PCI TEMPERATURE UPDATE - WARM On power up, when the outside temperature sensed by the ambient temperature sensor is TEMPERATURE UPDATE - COLD On power up, when the outside air temperature sensed by the ambient temperature sensor is colder EXTREME TEMPERATURE / OPEN OR SHORT If the measured outside temperature is more than 60°C (140°F) or the ambient temperature If the measured outside temperature is less than -45°C (-49°F) or the ambient temperature sensor AMBIENT TEMPERATURE SENSOR DESCRIPTION The Ambient Temperature Sensor is hardwired to the PCM. The ambient air temperature is moni- The ambient temperature sensor cannot be ad- justed or repaired and, if faulty or damaged, it must OPERATION The resistance in the ambient temperature sen- sor changes as the outside temperature rises or resistor. Based on the resistance of the ambient AMBIENT TEMPERATURE SENSOR The outside temperature function is supported by the ambient temperature sensor, a signal and If the Compass/Temp Mirror display indicates 60°C (140°F) or the ambient temperature sensor If the Compass/Temp Mirror display indicates -45°C (-49°F) or the ambient temperature sensor If there is an OPEN or SHORT circuit condition, it must be repaired before the Compass/Temp Mir- The ambient temperature sensor can be diag- nosed using the following Sensor Test. If there are AMBIENT TEMPERATURE SENSOR TEST 1. Turn the ignition OFF. 2. Disconnect and isolate the battery negative ca- ble. 3. Disconnect the ambient temperature sensor har- ness connector. 4. Measure the resistance of the ambient tempera- ture sensor using the following values: • 0° C (32° F) Sensor Resistance = 29.33 – 35.99 • 10° C (50° F) Sensor Resistance = 17.99 – • 20° C (68° F) Sensor Resistance = 11.37 – 13.61 • 25° C (77° F) Sensor Resistance = 9.12 – 10.86 • 30° C (86° F) Sensor Resistance = 7.37 – 8.75 • 40° C (104° F) Sensor Resistance = 4.90 – 5.75 The sensor resistance should read between these min/max values. If the resistance value is OK, refer 11 GENERAL INFORMATION |