1. Check for continuity between the following terminals of climate control unit connector B (16P) and the recirculation control motor 7P connector.
   16P: | 7P:
   --- | ---
   No. 10 | No. 5
   No. 11 | No. 7
Is there continuity?
YES | - | Go to Step 12 .
NO | - | Repair any open in the wire(s) between the climate control unit and the recirculation control motor.■
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 wire or poor connections at climate control unit connector B (16P) and at the recirculation control motor 7P 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 contorol unit and printed circuit board.■
NO | - | Check for loose wire or poor connections at climate control unit connector B (16P) and at the recirculation control motor 7P 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 contorol unit .■