Unplug in-car temperature sensor.
Measure resistance across sensor terminals.
If sensor resistance is not as specified, replace sensor.
If sensor resistance is okay, disconnect negative battery cable. Check wiring and connectors between sensor and EATC control panel for shorts or open circuits
IN-CAR & AMBIENT TEMPERATURE SENSOR RESISTANCE
Temperature °F ( °C)Ohms
50-68 (10-20)37,000-58,000
68-86 (20-30)24,000-37,000
86-104 (30-40)16,000-24,000
Tuesday, December 29th, 2009 AT 6:32 PM