HVAC

HVAC DTC Troubleshooting: 15

DTC 15:

A Short in the Evaporator Temperature Sensor Circuit

1. Turn the ignition switch to LOCK (0), and then turn it to ON (II).

2. Do the Self-Diagnostic Function with the heater control panel Initial Inspection and Diagnostic Overview.

3. Check for DTCs.

Is DTC 15 indicated?

YES -

Go to step 4.

NO -

Intermittent failure. Check for damaged wires or connections in the evaporator temperature sensor circuit.�

4. Turn the ignition switch to LOCK (0).

5. Remove the evaporator temperature sensor Service and Repair.

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

Is the evaporator temperature sensor OK?

YES -

With the evaporator temperature sensor disconnected, go to step 7.

NO -

Replace the evaporator temperature sensor Service and Repair.�

7. Disconnect the heater control panel 30P connector.

8. Check for continuity between body ground and heater control panel 30P connector terminals No. 13 and No. 28 individually.





Is there continuity?

YES -

Repair a short to body ground in the wire between the heater control panel and the evaporator temperature sensor.�

NO -

Go to step 9.

9. Check for continuity between heater control panel 30P connector terminals No. 13 and No. 28.





Is there continuity?

YES -

Repair a short 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 Service and Repair.�