Service Repair

Toyota Land Cruiser has HVAC Issues

Sept. 21, 2020

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; or improper MODE control function.

Mike Mavrigian

Information courtesy of Mitchell 1

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.

About the Author

Mike Mavrigian | Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.