Evaporator Temperature Sensor Test

WARNING: This page is about a different car, the 2008 Acura TSX, 2007 Acura TSX, 2006 Acura TSX, 2005 Acura TSX, and 2004 Acura TSX. However, it is still accessible from the selected car via links, so may be relevant.

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

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

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