Some 2017-2019 Toyota Land Cruiser vehicles may exhibit one or more of the following HVAC conditions:
Uneven temperature or air flow between the vents
Little or no air flow from the vents
Improper MODE control function
Additionally, some vehicles may store one or more of the following DTCs:
B1441 (air mix damper control servo motor circuit (front right lower air mix)
B1442 (air inlet damper control servo motor circuit)
B1443 (air outlet damper control servo motor circuit)
B1445 (passenger side cool air bypass damper control)
B1446 (air mix damper control servo motor circuit...driver side lower air mix)
B1447 (rear air mix damper control servo motor circuit...driver side lower air mix)
B1448 (passenger side face servo motor circuit)
B1449 (rear air outlet damper control servo motor circuit)
B1457 (driver side air outlet damper control servo motor circuit)
B1458 (passenger side air outlet damper control servo motor circuit)
B1486 (driver side air outlet damper control servo motor circuit)
B1488 (rear air mix damper control servo motor circuit...front passenger side)
Confirm that one or more of the previously noted conditions are present. If so, check for DTCs. If any of the DTCs listed above are present, flash reprogram the air conditioning amplifier assembly with the latest software.
