DTC indicator G or DTC B1231: An Open in the Evaporator Temperature Sensor Circuit

1. Clear the DTC.

1. Turn the ignition switch OFF, and then ON.

1. Operate the climate control system is several modes.

1. Check the DTCs.

Is DTC G or B1231 indicated?

YES | - | Go to Step 5 .
NO | - | Intermittent failure, check for loose wires or poor connections on the evaporator temperature sensor circuit.■

1. Remove the evaporator temperature sensor and test it.

Does the evaporator temperature sensor test OK?

YES | - | Go to Step 6 .
NO | - | Replace the evaporator temperature sensor .■

1. Disconnect climate control unit connector A (22P).

1. Check for continuity between the No. 14 terminal of climate control unit connector A (22P) and the No. 1 terminal of the evaporator temperature sensor 2P connector.

Is there continuity?

YES | - | Go to Step 8 .
NO | - | Repair open in the wire between the climate control unit and the evaporator temperature sensor.■