DTC indicator B or DTC B1226: A Short in the In-car Temperature Sensor Circuit Clear the DTC. Turn the ignition switch OFF, and then ON. Operate the climate control system is several modes. Check the DTCs. Is DTC B or B1226 indicated?
YES | - | Go to Step 5 .
NO | - | Intermittent failure.■
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 body ground. Is there continuity?
YES | - | Repair short to body ground in the wire between the climate control unit and the in-car temperature sensor.■
NO | - | Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit .■