Lexus LX470 2UZ-FE 89663-60651 SAP OFF Firmware
A guide to the Lexus LX470 2UZ-FE 89663-60651 engine ECU firmware and its SAP OFF FULL variant.
The 89663-60651 SAP OFF FULL entry is a modified engine ECU firmware file for a Lexus LX470 with the 2UZ-FE V8. Its named modification concerns the secondary air injection system, often called SAP. The catalog describes the file as a 736 KB full image with CRC OK.
What the engine ECU controls
The engine ECU manages functions including fuel injection, ignition timing and emissions-related diagnostics using inputs from sensors across the engine. The 89663-60651 identifier belongs to the Toyota and Lexus engine calibration part-number family. In this entry, it identifies the calibration associated with the LX470 and its 2UZ-FE engine.
Secondary air injection is an emissions-control function used during cold starts. An air pump and control valves supply fresh air to the exhaust so the catalytic converters can reach effective operating temperature sooner. The ECU commands the system and monitors its operation.
What SAP OFF FULL means
SAP OFF identifies this file as a variant intended to disable secondary air injection functionality in the ECU software. In practice, that can affect pump and valve commands or the diagnostics associated with the system. The label alone does not establish exactly which controls or fault checks were changed.
FULL describes the cataloged file as a full image rather than a named partial calibration. The CRC OK label indicates that the file is presented with a valid checksum. It does not, by itself, establish the behavior of every calibration change or compatibility with another ECU.
The related catalog name 89663-60651 identifies the calibration without a variant label. It should not be assumed to have the SAP OFF modification named by the full entry. Disabling emissions controls may also affect road-use compliance, depending on local rules.