Precaution in Replacing ECM

If ECM is replaced with new or used one without the functionality for the immobilizer control system, the engine will not be started. In case of the above, check if the newly installed ECM has the functionality for the immobilizer control system referring to its part number.
After ECM is replaced with new one or used one, the transponder code in the transponder built in the ignition key has to be registered with ECM. Or, the engine cannot be started up. For the registration procedure, refer to PROCEDURE AFTER ECM REPLACEMENT .