Evaporator Temperature Sensor Test

NOTE: Before testing the sensor, check for climate control DTCs (see HOW TO USE THE SELF-DIAGNOSTIC FUNCTION WITH THE HDS ).

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

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

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