How To Perform VIN Writing For Engine Control Module, Kos-Ecu And ETACS-Ecu: Notes

Follow the procedure below to register the VIN of the ETACS-ECU and the Keyless Operation System (KOS).

VIN is stored in the engine control module (ECM), ETACS-ECU, and the KOS-ECU. If the VIN is improperly erased, the engine warning lamp or the keyless operation system warning indicator illuminates, and the diagnostic trouble code is displayed. When the ECM, ETACS-ECU, and the KOS-ECU are replaced, follow the procedure below to write the VIN.

Fig 1: Engine Control Module VIN Writing Flow Chart

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

NOTE:

Chassis number writing of the OSS ECU and ESL ECU is described in "Keyless Operation System (KOS)". (Refer to ON-VEHICLE SERVICE < OSS-ECU > .)
Perform the variant coding of the ECM when the VIN or the vehicle identification number is registered to the ECM.