## DTC Troubleshooting: G

DTC indicator G: | An Open 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 G indicated? YES - Go to 4. NO - Intermittent failure, check for loose wires or poor connections on the evaporator temperature sensor circuit.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.

7. | Check for continuity between the No. 21 (with ETCS) or No. 22 (without ETCS) terminal of climate control unit 28P connector and the No. 1 terminal of the evaporator temperature sensor 2P connector. With ETCS Without ETCS Is there continuity? YES - With ETCS: Go to 10. Without ETCS: Go to 8. NO - Repair open in the wire between the climate control unit and the evaporator temperature sensor.n

8. | Disconnect PCM connector E (31P).

9. | Check for continuity between the No. 12 terminal of PCM connector E (31P) and the No. 1 terminal of the evaporator temperature sensor 2P connector. Is there continuity? YES - Go to 10. NO - Repair open in the wire between the PCM and the evaporator temperature sensor.n

10. | Check for continuity between the No. 18 terminal of climate control unit 28P connector (with ETCS) or No. 4 terminal of PCM connector E (31P) (without ETCS) and the No. 2 terminal of the evaporator temperature sensor 2P connector. With ETCS Without ETCS Is there continuity? YES - Check for loose wire or poor connections at climate control unit 28P connector (with ETCS), PCM connector E (31P) (without ETCS) and at the evaporator temperature sensor 2P connector. If the connections are good, substitute a known-good climate control unit (with ETCS) or PCM (without ETCS), and recheck. If the symptom/indication goes away, replace the original climate control unit (with ETCS) or PCM (without ETCS).n NO - Repair open in the wire between the climate control unit (with ETCS) or PCM (without ETCS) and the evaporator temperature sensor.n