Front Evaporator Temperature Sensor Test

WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

Remove the evaporator front temperature sensor (see FRONT EVAPORATOR TEMPERATURE SENSOR REPLACEMENT ).
Dip the sensor in ice water, and measure the resistance between its terminals.

Fig 1: Measuring Resistance Between Evaporator Front Temperature Sensor Connector Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Then pour warm water on the sensor, and check for a change in the resistance.
Compare the resistance readings with the specifications shown in the graph; the resistance should be within the specifications.

Fig 2: Resistance To Temperature Graph
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If the resistance is not as specified, replace the front evaporator temperature sensor (see FRONT EVAPORATOR TEMPERATURE SENSOR REPLACEMENT ).