Toyota ECU Firmware SW#89663-60710- MOD_E2_sapoff.bin
A catalog overview of Toyota firmware 89663-60710 and the modified file labeled for secondary air injection pump off.
SW#89663-60710- MOD_E2_sapoff.bin is a modified firmware file labeled for secondary air injection pump off. Toyota’s 89663 part-number family is associated with engine control module calibrations, making an engine ECU application likely. The exact vehicle and engine are not established by the related catalog entry 89663-60710.
What the SAP-off label means
On vehicles equipped with secondary air injection, the engine control system can command a pump and valves to introduce fresh air into the exhaust during cold starts. This helps the catalytic converter reach its effective operating temperature and reduces emissions while the engine is warming up.
The filename’s sapoff label indicates a modification intended to turn off secondary air pump operation or related control. The name alone does not establish which commands or diagnostic checks were changed. MOD identifies this file as a modified variant, while E2 is an additional variant label whose precise meaning is not established by the catalog name.
Engine ECU context
An engine ECU uses its calibration to govern functions such as fueling, ignition and emissions-system control. Those are general responsibilities of the controller family, not evidence that this particular file changes all of them. Disabling secondary air injection can affect cold-start emissions and may have legal implications for road use.
The related identifier 89663-60710 links this entry to the same calibration number, but it does not identify the exact application or describe the changes in the modified file. It should not be treated as a vehicle fitment list.