P1607 ECU Internal Error (check calibration)

[RyoHazuki56]

Hello,

I have a K-Pro v4 installed in a PRD ECU from a JDM CTR. It's installed in my '93 MR2. I am the original owner/purchaser. Worked fine all year last year. This past winter I had the car in the air doing a few projects, so hadn't run it since October. In April this year a friend was having trouble with his KPro and K24 swap, and we suspected the ECU might be bad, so I (perhaps foolishly) loaded his .cal onto my K-Pro and hooked it up to his car to test that theory. In his car we got the daughterboard error code that seemed to indicate low battery voltage, so blamed wiring/battery and moved on. Flash forward to yesterday, I hooked the K-Pro up to my laptop in my own car again as I'm finally wrapping up projects, and now the ECU is throwing a P1607 error. I have tried reloading my original tune, disconnecting the battery for a while, reloading the ITR base tune, clearing codes manually, etc.

In reading a few other threads here, it sounds like this may mean that the ECU is broken if swapping the cal doesn't fix it? Since the last time when it worked I've added sensors (flex fuel, Wideband, and an oil temp), re-wired a larger fuel pump and new relay, and also plugged into someone else's unknown wiring on the k24 mentioned above, so I certainly may have caused the problem. But, even disconnecting all the new sensors it still throws the code, so I don't have an effective means of troubleshooting the error as it sits.

So, my questions are:
1. Is it possible to mess up an ECU by loading a .cal from another ECU? In a way that wouldn't be fixed by restoring the original .cal?
2. If I'm still able to upload a calibration, hear the fuel pump cycle after the upload, datalog, see voltages from several sensors, and see ignition correctly, does that give good reason to believe that the K-Pro board would still be intact? Any other way to tell whether the failure is K-Pro, ECU, or wiring?
3. If the K-Pro still works, is it possible to swap the board into another compatible ECU? And, if so, can I contact you guys more officially about the right way to diagnose the ECU problem and figure out a fix? I have purchased a second PRD ECU in case I need a donor.

[Spunkster]

The ECU cannot be damaged by uploading a different calibration. The ECU does sound like it has been damaged, maybe it was dropped or subjected to harsh vibration. The K-Pro would have to be swapped to the working ECU. What is the serial number that is on the K-Pro inside the ECU?

[RyoHazuki56]

Thanks much for the quick response! The 5 digit number on the K-Pro sticker on the board reads "54809" -- if I'm missing the serial #, let me know and I'll see if I can upload a pic.

Just to cover other questions from the sticky, I'm running version 4.5.5 of KManager currently. I had 4.4.0 last year, I believe, so I did update this year and wasn't sure if I need to do something to align my .cal and any requirements for the new version or new firmware, etc. I think I covered the other relevant pieces, but if I can add more detail, let me know.

I took pretty good care of the ECU otherwise, but I'll look into some sort of rubber isolators on the mounts to cut down on vibration. I don't think I touched or banged on anything while opening the case and adding the analog input connector, but could be a lot of things unfortunately.

[Spunkster]

Send an email to support <at> hondata.com with the following and I will issue an RMA and give you further
instructions:

Name:
Address:
Phone:
Email:
Serial#:
Description of problem:

Include a link to this thread.