Not following the correct procedure can lead to you damaging your ECU, please ensure you follow the following tips.
- Ensure all lights, stereo, air conditioning and any ancillaries are switched off during the reading/writing procedure.
- Ensure the battery is in good condition and fully charged. Either ensure you take for a drive to maximise the battery prior to carrying out the process or ideally attached a stabilized battery charger during the process.
- Take care not to knock or remove the OBD cable during the process.
- Do not turn off the ignition unless the device tells you to do so.