1. Check for continuity between the No. 15 terminal of climate control unit connector A (22P) and the No. 2 terminal of the in-car temperature sensor 2P connector.

Is there continuity?

YES | - | Go to Step 9 .
NO | - | Repair open in the wire between the climate control unit and the in-car temperature sensor.■

1. Perform the A/C communication in the Self-Diagnostic Function to obtain the IS-BUS communication verification status.

Is the communication OK?

YES | - | Check for loose wires or poor connections at climate control unit connector A (22P) and at the in-car temperature sensor 2P connector. If the connections are good, substitute a known-good climate control unit and printed circuit board, and recheck. If the symptom/indication goes away, replace the original climate control unit and printed circuit board.■
NO | - | Check for loose wires or poor connections at climate control unit connector A (22P) and at the in-car temperature 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 .■