Toyota FJ Cruiser 4.0 89663-35540_ST1_E2 Firmware

89663-35540_ST1_E2 is listed as an engine-control firmware variant for the Toyota FJ Cruiser 4.0 with the 1GR-FE gasoline engine. Its 89663-35540 identifier belongs to Toyota’s engine-control calibration part-number family. The related catalog entry lists the base identifier without the variant suffix.

Engine control and the variant label

The engine control module uses calibration data to manage functions such as fuel delivery, ignition timing and emissions control. These settings affect how the engine responds to the driver and operates under different loads and temperatures. The catalog name does not establish which of those settings were changed in this particular file.

ST1 commonly denotes a Stage 1 modified calibration rather than a stock file. E2 is another variant label, but its precise meaning is not established by the filename. The listing does not identify a specific emissions-system change, performance result or fuel requirement for this variant.

The additional text SV 4000 p. appears in the listing, but it does not reliably identify a software function or operating setting. The full identifier distinguishes this modified catalog entry from the related 89663-35540 base entry.