Guidelines for electronic immobilizer removal
Operational document for workshops and installers. It summarises the requirements and procedures to follow before and after writing a file with the immobilizer disabled (IMMO OFF), to ensure a clean result and minimise workshop callbacks.
Prerequisites
Mechanical condition of the vehicle
Before working on the ECU, make sure the vehicle is mechanically sound. Immobilizer removal or ECU virginisation does not solve pre-existing mechanical problems (timing chain, injectors, sensors, battery). Proceeding on an unhealthy vehicle generates DTCs that will be incorrectly attributed to the intervention.
Mandatory diagnostics
It is STRICTLY MANDATORY to have a compatible diagnostic tool available to check for faults BEFORE and AFTER writing. It is strongly recommended to send us the DTC log so we can delete in the file the ones related to the supplied solution.
Sending the ECU file
It is mandatory to send the complete ECU file, read in Bench or Bootmode (no partial flashes). The customer is responsible for not sending partial files and for ensuring the write is performed on the same ECU the file was read from.
Installation procedure
Immobilizer removal
Strictly follow the instructions supplied with the file (e.g. disconnect the immobox, bridge cables if indicated, recode the antenna). Instructions are project-specific: do not apply generic procedures.
Checksum verification
Some writing tools may not automatically correct the checksum after the edit. The customer is responsible for manual correction via a compatible editor. We can perform the checksum correction for an additional cost, not included in the file sale price.
Important notes
For any difficulty we are available. Please refer to the disclaimers attached to the file and to the terms of use published on the site.