Vehicle Identification And Serial Numbers VEHICLE IDENTIFICATION AND SERIAL NUMBERS VEHICLE IDENTIFICATION NUMBER (a) The vehicle identification number is stamped on the vehicle body and on the certification label or name label as shown in the illustration. 
ENGINE SERIAL NUMBER AND TRANSAXLE CODE (a) The engine serial number is stamped on the cylinder block of the engine as shown in the illustration. 
(b) The transaxle code, transaxle type and transaxle serial number are stamped on the transaxle case as shown in the illustration. 
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Smart Key System(for Start Function, Hv Model): Engine/Power Switch Malfunction (B2278)
DESCRIPTION This DTC is stored when the SSW1 contact signal and SSW2 contact signal, which are detected when the power switch is operated, do not match. DTC No. Detection Item DTC Detection Condition Trouble Area Note B2278 Engine/Power Switch Malfunction When the power switch is operated, the SSW1 ...
