Toyota SW#89663-0CA71 MOD_E2_sap_off.bin Firmware
A catalog overview of Toyota calibration 89663-0CA71 and the MOD_E2_sap_off filename variant.
SW#89663-0CA71- MOD_E2_sap_off.bin is a modified firmware file whose name indicates a secondary air injection system off variant. Secondary air injection supplies fresh air to the exhaust during cold starts to help the catalytic converter reduce emissions while it warms up.
The 89663 part-number family is associated with Toyota engine control software. On that basis, this file is tentatively associated with an engine control module, which manages engine operation and emissions-related functions. The full calibration identifier is 89663-0CA71; the catalog also lists that identifier without the modified filename suffix.
What the variant label means
MOD identifies the named file as modified, while sap_off indicates that the modification concerns switching off the secondary air pump function. The filename alone does not establish exactly how the software changes pump operation or fault monitoring. E2 is an additional variant label whose meaning is not established by the catalog name.
The identifier by itself does not establish a specific vehicle application or show that the related 89663-0CA71 catalog entry is a stock file.