Mitsubishi Repair Problems? Ask a Mechanic for Answers ASAP
Hi,The immobilizer ecu is located behind and below the radio/ac controls area. It is the small black plastic box mounted to the dash support beam (not the metal silver box).When you replaced the PCM, did you get it from a local yard or online?
No problem.In this case you are going to have to get the vehicle to a dealership or someone with a compatible key programmer to re-register your keys.The reason you are getting that code is due to the immobilizer ecu not matching the PCM. When these are installed the keys get re-registered since the key data that allows the engine to run is stored inside the PCM. In the process, the PCM is paired to the immobilizer ecu. If you try to operate the vehicle with a PCM and immobilizer ecu that do not match, you will get the immobilizer fault.I asked about the source since if it was from a junkyard you could retrieve the matching immobilizer ecu and keys and skip the key registration process, but in this instance where it is a reman unit of course the PCM is no longer paired nor does it have any key data to save.
Odds are they were not using a compatible programmer. This is a problem with locksmiths using grey market equipment that is a clone of the factory hardware; they sell these units that are literally copies of the factory software, but they do not realize Mitsubishi uses an external encryption box so their copied tools just write erroneous information to the PCM.To date, the only third party tools I have found that works on this era Mitsubishi is the SBB tool, which is a counterfeit unit and not exactly something most people want to be caught with. The common tools most locksmiths use.... Autels, Launches, MVPs, etc are not compatible with this model.If the PCM is good and the immobilizer ecu was fine before the swap, you need to get it to a dealer for proper registration.
It would be the best course of action, as it is the only way to be sure that the key is registered correctly.If the vehicle operated fine prior to the timing belt issue and the damage to the PCM issue, there is no reason to suspect the immobilizer ecu needs to be changed at all. The immobilizer ecu will not work in a situation like this where you have swapped the PCM until the key is properly registered.
Yep, that means your crank sensor is working fine, you just need the keys registered correctly so that the PCM and ecu can get along.
If the engine ran with modification on the old damaged PCM, then the new PCM should have fixed the issue... it just isn't registered properly with the keys. While I suppose the new PCM could have a problem, it is unlikely by comparison particularly with the immobilizer fault indicating the key isn't recognized etc.
Yep, I think you were right on the money... the engine light is working again so you know the fault that damaged the old PCM is no longer present, you just need to get those keys registered correctly.
They will have no problem with them; I'm glad to help out!
I'm sorry, I had already left for the night when you had responded.In this situation, no, a tow truck is the only option. There is a temporary over ride for the immobilizer, however it only works with the original PCM and immobilizer ecu. If you swap either out, the over ride will not function until they get registered and paired again since again they are mismatched and locked out of operation until that is done.