IF YOU CONFIRM DTCs B24B7 (Intake Door), B24B9 (Mode Door), and B24BB (Air Mix Door) are stored. ACTION 1. Replace the Front Air Control Unit with the new part listed in the PARTS INFORMATION section. - Refer to the Electronic Service Manual (ESM), section HAC-Heater and Air Conditioning System, for removal and installation information. 2. Erase DTCs, and confirm B24B7, B24B9, and B24BB do not store. - If DTC B24B7, B24B9, and B24BB store after replacement of the Front Air Control Unit, refer to ASIST and the ESM for further diagnosis. See this bulletin for further detail.
