Toyota Firmware SW#89663-60E10-B MOD_E2_sap_off.bin

SW#89663-60E10-B MOD_E2_sap_off.bin is a modified Toyota firmware file whose name identifies a secondary air injection variant. The sap_off label indicates that the file is intended to disable secondary air pump operation in the software. The related catalog entry is 89663-60E10.

What secondary air injection does

Secondary air injection supplies fresh air to the exhaust after a cold start. This helps reduce emissions while the exhaust system warms up. Toyota engine control software manages the system by commanding its pump and air-control components and monitoring their operation.

A file labeled sap_off describes a change to that emissions-related function, not a general description of everything the engine controller manages. The filename alone does not establish exactly which commands or diagnostic checks have been changed, or how the modification behaves in every operating condition.

Reading the firmware name

89663-60E10 identifies the calibration family associated with this catalog entry. Toyota 89663 numbers are associated with engine control software, but this identifier and its related catalog name do not establish an exact vehicle model, engine, or controller hardware application.

The MOD_E2 portion marks this as a modified variant. The specific sap_off behavior belongs to the named modified file and should not be assumed for a stock 89663-60E10 calibration. The -B suffix is part of the supplied file identifier, but its precise revision meaning is not established by the catalog name.