Toyota and Lexus 89663-60Q10_TUN_SAPoff.bin Firmware
A catalog overview of the Toyota and Lexus 89663-60Q10 engine calibration and its tuned SAP-off variant.
89663-60Q10_TUN_SAPoff.bin is a tuned engine-control firmware file labeled for secondary air injection pump deactivation. The secondary air injection system supplies fresh air to the exhaust during a cold start, helping the catalytic converter reach operating temperature and reduce emissions. A SAP-off variant indicates that this function has been disabled in the modified calibration, although the filename alone does not establish exactly how the change was implemented.
Engine calibration and variant labels
The identifier 89663-60Q10 belongs to Toyota’s engine calibration part-number family. Engine-control software governs functions such as fuel delivery, ignition and emissions-system operation in response to operating conditions.
The related catalog entry 89663-60Q10 identifies the underlying calibration without a modification label. In 89663-60Q10_TUN_SAPoff.bin, TUN denotes a tuned variant and SAPoff names the secondary air pump change. Those labels apply to the modified file, not automatically to the unqualified catalog entry.
Secondary air injection is most relevant during cold-start emissions control. Disabling it changes that aspect of emissions-system operation. The catalog identifiers do not establish a specific vehicle application or describe any other tuning changes.