How To Perform VIN Writing For Engine Control Module, Kos & OSS-Ecu And ETACS-Ecu: Notes
CAUTION:
The F.A.S.T-Key (Free-hand Advanced Security Transmitter) is described as the Keyless Operation System (KOS) in this Service Information KOS is indicated as F.A.S.T. in the scan tool (M.U.T.-III) display.
The chassis number/Vehicle Identification Number (VIN) is stored in the engine control module (ECM), the KOS & OSS-ECU and the ETACS-ECU. If the chassis number/VIN is improperly erased, the engine warning light or the keyless operation system warning indicator illuminates, and the diagnostic trouble code (DTC) is displayed. When the ECM, the KOS & OSS-ECU and the ETACS-ECU are replaced, follow the procedure below to write the chassis number/VIN.