CAN-BUS indicating MFD (CCH) or Front Diff Lock (4WD)Switch failed in the armrest. Possiblefailure modes: 1. MFD (CCH) or Front Diff Lock (4WD) failed in Armrest2. Auto MFD Switchfailed in Armrest, (CCH). 3. Communication problems between the TCU controller and theArmrest
If Inadequate air flow is problematic, so clogged air filters, evaporator core air flow restricted, faulty blower fan motors, defective blower switch or faulty wiring or loose connections.