## DTC Troubleshooting: H

DTC indicator H: | A Short in the Evaporator Temperature Sensor Circuit

1. | Clear the DTC by turning the ignition switch OFF, and then ON (II).

2. | Operate the climate control system in several modes.

3. | Check for DTCs using the self-diagnostic. Is DTC H indicated? YES - Go to 4. NO - Intermittent failure.n

4. | Turn the ignition switch OFF.

5. | Test the evaporator temperature sensor. Does the evaporator temperature sensor test OK? YES - Go to 6. NO - Replace the evaporator temperature sensor.n

6. | Disconnect climate control unit 28P connector (with ETCS) or PCM connector E (31P) (without ETCS).

7. | Check for continuity between the No. 21 terminal of the climate control unit 28P connector (with ETCS) or No. 12 terminal of the PCM connector E (31P) (without ETCS) and body ground. With ETCS Without ETCS Is there continuity? YES - Repair short to body ground in the wire between the climate control unit (with ETCS) or PCM (without ETCS) and the evaporator temperature sensor.n NO - With ETCS: Go to 8. Without ETCS: Go to 9.

8. | Check for continuity between the No. 21 terminal and the No. 18 terminal of climate control unit 28P connector. Is there continuity? YES - Repair short in the wires between the climate control unit and the evaporator temperature sensor.n NO - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit.n

9. | Check for continuity between the No. 22 terminal of climate control unit 28P connector and the No. 4 terminal of the PCM connector E (31P). Is there continuity? YES - Repair short in the wires between the climate control unit, PCM and the evaporator temperature sensor.n NO - Substitute a known-good climate control unit or PCM, and recheck. If the symptom/indication goes away, replace the original climate control unit or PCM.n