HVAC

HVAC DTC Troubleshooting: 15

DTC 15: A Short in the Evaporator Temperature Sensor Circuit

1. Remove the evaporator temperature sensor. Service and Repair

2. Test the evaporator temperature sensor. Evaporator Temperature Sensor Test

Is the evaporator temperature sensor OK?
YES - Go to step 3.

NO - Replace the evaporator temperature sensor.


3. Disconnect the heater control panel 30P connector.

4. Check for continuity between terminal No. 28 of the heater control panel 30P connector and body ground.

Is there continuity?
YES - Repair short to body ground in the wire between the heater control panel and the evaporator temperature sensor.

NO - Substitute a known-good heater control panel, and recheck. If the symptom/indication goes away, replace the original heater control panel.