DESCRIPTION This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and power management control ECU stops for 10 seconds or more.
HINT: The power management control ECU is built into the certification ECU (smart key ECU assembly). CAUTION / NOTICE / HINT NOTICE:
PROCEDURE
(a) Clear the DTCs. Body Electrical > Smart Key > Clear DTCs
(a) Check for DTCs. Body Electrical > Smart Key > Trouble CodesOK: DTC B278C is not output.
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Air Conditioning System(for Gasoline Model): Cooling is Poor
DESCRIPTION If the cooling effect of the air conditioning system is weak, the following factors may be the cause. Symptom Factor Cooling effectiveness is poor Cooling response is slow ECO mode control of air conditioning system is enabled Cooler compressor assembly malfunction Refrigerant volume (hi ...