Neutralizing of ECM - I

NEUTRALIZING THE ECM
The ECM can be set to a "neutral" state using a tester.

Once a valid ignition key is inserted and started, the ECM requests the vehicle specific data from the tester. Communication messages are described in "Neutral MODE". After successfully receiving the data the ECM is neutralized.

The ECM will remain locked. Neither "limp home" mode nor the "twice ignition" function will be accepted by the ECM.

The key teaching follows procedures described for a "virgin" ECM. Vehicle specific data must remain unchanged due to unique programming of the transponder. If data changes, new keys with a "virgin" transponder will be required.