DTC indicator A or DTC B1225: An Open in the In-car Temperature Sensor Circuit Clear the DTC. Turn the ignition switch OFF, and then ON (II). Operate the climate control system is several modes. Check the DTCs. Is DTC A or B1225 indicated?
YES | - | Go to Step 5 .
NO | - | Intermittent failure, check for loose wires or poor connections on the in-car temperature sensor circuit.■
Remove the in-car temperature sensor, and test it. Does the in-car temperature sensor test OK?
YES | - | Go to Step 6 .
NO | - | Replace the in-car temperature sensor .■
Disconnect climate control unit connector A (22P). Check for continuity between the No. 11 terminal of climate control unit connector A (22P) and the No. 1 terminal of the in-car 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 in-car temperature sensor.■