DTC Troubleshooting: H
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  CLIMATE CONTROL UNIT 28P CONNECTORWire side of female terminalsBLUWithout ETCS  PCM CONNECTOR E (31P)Wire side of female terminalsBLUIs 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 - |
| 8. | Check for continuity between the No. 21 terminal and the No. 18 terminal of climate control unit 28P connector.
 CLIMATE CONTROL UNIT 28P CONNECTORWire side of female terminalsBLULT GRNIs 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).
 PCM CONNECTOR E (31P)Wire side of female terminalsBLUCLIMATE CONTROL UNIT 28P CONNECTORWire side of female terminalsPNKIs 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 |