DTC 14
DTC 14: An Open in the Evaporator Temperature Sensor Circuit1. Remove the evaporator temperature sensor.
2. Measure the resistance between the No. 1 and No. 2 terminals of the evaporator temperature sensor.
*Dip the sensor in ice water, and measure resistance. Then pour warm water on the sensor, and check for a change in resistance.
*Is the resistance within the specifications shown on the graph?
YES - Go to step 3.
NO - Replace the evaporator temperature sensor.
3. Disconnect the climate control unit 30P connector.
4. Check for continuity between the No. 5 terminal of the climate control unit 30P connector and the No. 1 terminal of the evaporator temperature sensor 2P connector.
Is there continuity?
YES - Go to step 5.
NO - Repair open in the wire between the climate control unit and the evaporator temperature sensor.
5. Check for continuity between the No. 2 terminal of the climate control unit 30P connector and the No. 2 terminal of the evaporator temperature sensor 2P connector.
Is there continuity?
YES - Check for loose wires or poor connections at the climate control unit 30P connector and at the evaporator temperature sensor 2P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit.
NO - Repair open in the wire between the climate control unit and the evaporator temperature sensor.