1. Measure the resistance between the No. 14 and No. 15 terminals of climate control unit connector A (22P).

Is the resistance less than 24 kΩ?

YES | - | Go to Step 13 .
NO | - | Repair cause of high resistance in the evaporator temperature circuit.■

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 wire or poor connections at climate control unit connector A (22P) and at the A/C pressure switch 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 wire or poor connections at climate control unit connector A (22P) and at the A/C pressure switch 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 .■