Toyota or Lexus SW#89663-60B81- MOD_E2_sap_off.bin Firmware
A catalog reference for Toyota or Lexus calibration 89663-60B81 and its modified SAP-off filename label.
SW#89663-60B81- MOD_E2_sap_off.bin is a modified firmware file associated with Toyota or Lexus calibration identifier 89663-60B81. Its sap_off label indicates an intended modification to secondary air injection operation, commonly called the secondary air injection pump or SAP system.
Secondary air injection supplies fresh air to the exhaust during certain cold-start conditions. This helps the exhaust catalyst reach an effective operating temperature sooner and reduces emissions while the engine warms up. A file labeled sap_off suggests that this function or its monitoring has been altered, but the filename alone does not establish the exact software changes or their effect on warning lights and diagnostic codes.
Calibration and variant labels
The related catalog entry 89663-60B81 identifies the calibration without the modified file’s suffixes. The MOD_E2_sap_off label belongs specifically to SW#89663-60B81- MOD_E2_sap_off.bin. Here, MOD denotes a modified variant, while the meaning of E2 is not established by the catalog name.
The 89663 part-number family is associated with Toyota engine-control calibration data, making an engine control module association plausible. The available identifier does not establish the exact vehicle application or prove which secondary air injection routines were changed.