The air conditioning system was inoperative, with no compressor engagement.

Confirmed that the air conditioning was not functioning. The system was fully charged with refrigerant, but the compressor clutch was not activating. Fuse box inspection revealed signs of prior probing and damaged fuse casings. Power could be manually supplied to the compressor, and it would engage, indicating the clutch circuit was functional. The fault appeared to be a missing negative control signal from the ECU. Scan tool data also showed “no signal from A/C switch,” suggesting an input issue to the control module.