DESCRIPTION If warm air blows from the registers regardless of the temperature setting of the air conditioning system, the following factors may be the cause.
PROCEDURE
(a) Operate each switch on the air conditioning control panel (radio and display receiver assembly) and check that the switch indicators operate normally. OK: All switch indicators operate normally.
(a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Air Conditioner / Active Test. (e) Perform the Active Test according to the display on the Techstream. Body Electrical > Air Conditioner > Active Test
OK: Each damper servo motor operates.
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Lin Communication System(for Gasoline Model): P/W Master Switch Communication Stop (B1206,B1273,B2321-B2324)
DESCRIPTION This DTC is stored when LIN communication between the main body ECU (multiplex network body ECU) and multiplex network master switch assembly, sliding roof ECU (sliding roof drive gear assembly)*, power window regulator motor assembly (driver door), power window regulator motor assembly ...