The 2zr-fe engine swap guide

[CTScott]

Originally Posted by CrankyOldMan

So even with a non-immobilizer ECM, there's still a chance that the immobilizer will prevent the engine from running (via K-line)? Is the fix for that to just get a non-immobilizer ECM and disconnect the K-line from the transponder key ECU (or remove the transponder system entirely)?

With one of the prior 2ZR swaps I helped with there was an issue where the non-immobilizer ECM started acting like it was immobilizer enabled when the chassis still had the transponder key ECM present. So, when installing a non-immobilizer ECM you do need to make sure that the transponder key ECU is disconnected.

Unfortunately the opposite is not true, where installing an immobilized ECM in a non-immobilizer car eliminates the immobilizer function.