DTC Troubleshooting: B1229 (E)

DTC indicator E or DTC B1229: An Open in the Sunlight 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 E or B1229 indicated?
YES | - | Go to Step 5 .
NO | - | Intermittent failure, check for loose wires or poor connections on the sunlight sensor circuit.■
Disconnect the sunlight sensor 2P connector. Disconnect climate control unit connector A (22P). Check for continuity between the No. 13 terminal of climate control unit connector A (22P) and the No. 2 terminal of the sunlight sensor 2P connector. Is there continuity?
YES | - | Go to Step 8 .
NO | - | Repair open in the wire between the climate control unit and the sunlight sensor.■

Check for continuity between the No. 15 terminal of climate control unit connector A (22P) and the No. 1 terminal of the sunlight sensor 2P connector. Is there continuity?
YES | - | Go to Step 9 .
NO | - | Repair open in the wire between the climate control unit and the sunlight sensor.■
Reconnect the sunlight sensor 2P connector. Reconnect climate control unit connector A (22P). Test the sunlight sensor. Is the sunlight sensor OK?
YES | - | Check for loose wires or poor connections at climate control unit connector A (22P) and at the sunlight sensor 2P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit .■
NO | - | Replace the sunlight sensor .■