Examination
1. The supply air temperature sensor is a thermistor, i.e. its resistance decreases as the sensor temperature rises.
1998 4-cylinder and 6-cylinder models
2. Check that the sensor resistance at room temperature is approximately 35.5-39.2 kΩ. Heat the sensor to a temperature of 60°C and check that its resistance has decreased to 7-8 ohms. Replace the sensor if it is defective.
1993-1997 6-cylinder models
3. Check that the sensor resistance at room temperature is approximately 2-3 kΩ. Heat the sensor to a temperature of 60°C and check that its resistance has decreased to 400-700 ohms. Replace the sensor if it is defective.
Replacement
1. Disconnect the negative battery cable.
1998 4-cylinder and 6-cylinder models
2. Disconnect the sensor connector and unscrew the sensor from the air filter housing.
3. Installation is carried out in the reverse order of removal.
1993-1997 6-cylinder models
4. The air temperature sensor is part of the air flow sensor and should only be replaced with the air flow sensor.