Evaporator Temperature Sensor Test

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NOTE: Before testing the sensor, check for climate control DTCs (see HOW TO CHECK FOR DTCS WITH THE HDS ).

Remove 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 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 Graph
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If the resistance is not as specified, replace the evaporator temperature sensor (see EVAPORATOR CORE REPLACEMENT ).