Toyota LC150 1GR-FE 89663-60X71: SAP OFF Firmware

WinOLS Toyota LC150_1GRFE_89663-60X71_E2_SAP OFF FULL_CVN OK_CRC OK_GEN2 is cataloged as modified engine-control firmware for a Toyota Land Cruiser Prado 150 with the 1GR-FE gasoline V6. Its named change is SAP OFF FULL, indicating a calibration intended to disable secondary air injection operation. The 89663-60X71 identifier belongs to the Toyota engine ECU calibration family.

What secondary air injection does

On an equipped engine, the secondary air injection system supplies fresh air to the exhaust after a cold start. This helps reduce emissions while the catalytic converters warm up. The engine ECU manages the system’s operation and monitors it for faults.

The SAP OFF FULL label describes a modified variant, not the normal function of a stock calibration. In practice, it indicates that the secondary air injection strategy has been disabled in the file. The name alone does not establish exactly which commands, diagnostic checks or fault reports were changed.

Reading the filename

LC150 identifies the Land Cruiser 150 series, while 1GRFE identifies the engine family. 89663-60X71 is the calibration identifier associated with this entry. The filename also includes E2 and GEN2, but does not define those labels in enough detail to establish a specific emissions specification or controller hardware version.

CVN OK and CRC OK are file labels claiming that the calibration verification number and checksum are acceptable. Those claims do not independently establish the file’s behavior, compatibility or emissions compliance.

Secondary air injection faults can involve the pump, valves, passages, wiring or ECU monitoring. A modified calibration that suppresses system operation is therefore different from diagnosing or repairing the underlying hardware, and disabling emissions controls may be prohibited for road use.