1. Check for continuity between the No. 9 terminal of the audio-HVAC module 22P connector and the No. 2 terminal of the evaporator temperature sensor 2P connector.

Is there continuity?

YES | - | Check for loose wires or poor connections at the audio-HVAC module 22P connectors and at the evaporator temperature sensor 2P connector. If the connections are good, substitute a known-good audio-HVAC module, and recheck. If the symptom/indication goes away, replace the original printed circuit board.■
NO | - | Repair open in the wire between the audio-HVAC module and the evaporator temperature sensor.■