Volvo Penta KAD 44 ECU Reset

Cutting power to the ECU resets it, if the code fault is still present when repowered then fault still exists, or ECU is bad....

Not always will the controller / ECU reset with the loss or removal of power to the controller / ECU. It may have a hard set code that will not reset without a programmer or a diagnostic tool. I would check with a certified dealer / service center or a very competent marine mechanic since some of the marine systems are proprietary unto themselves and do not reference to the automotive versions of these engines.

Have you checked all wiring and connections yet? Especially those associated with the actuator....

Boats and electricals...hmmm....

Mechanic who can't work this out...sad.

You are lucky you have two identical units to perform swap analysis.

Have you spoken with the volvo marine dealer?

Dear Wal We have talked with many mechanics and all are very confused about the problem, especially when the "9.1" failure code is still present and recorded into the Control Unit and ther is no possibility. Tomorrow the Mechanic will swap the controlers between both engines. Is the problem is fixed, then we will try to reset de unit or change it. I'll keep you informed Regards, Nicolas.

Apparently there are fuses associated with the actuator...have these all been checked?

You will have to search the internet yourself to try and find a manual. Finding a mechanic with a manual in your area may be faster.

I noted that the ECU is called a "controller" by volvo... you may want to use this term instead of ECU in your search criteria.

Thanks, For your comments. I have already checked all the fuses, the actuator and wiring.Tomorow will swap the controllers. Last chance!! I'll keep you updated. Regards, Nicolas.

I was a Volvo mechanic for some time and you will in all probability need to get hold of the Volvo Vodia Tool (Diagnostic device) if all connections, fuses, etc have been checked out. You will plug in take a reading and if the obvious does not show then the tool will be taken to a computer with proper code and send the info to Sweden for a diagnosis. These folks keep close control of their diesel diagnosing technology.

Dear Roy, Last week we put the diagnosis tool and it is impossible to " connect " with the controller, wile in the other engine that's normal works properly. Tomorrow we will swap the ecu's it's the last chance. I'll keep all updated. Nicolas.

Thanks I learn something every day. We had many dual engine systems but I was not aware of the engines being connected to that extent. Seems like if one goes down then it could take the other down in that circumstance. Anxious to see what comes out when you can test primary ECU properly.

No mention of any interlocks between the two power plants. That would defeat the whole idea of redundancy if they were mutually dependent.

Each donk ha sits own ECU, the ECU is not a single point of failure for the entire propulsion system.

What you are accustomed to is quite right.

I believe that OP will be taking the ECU off one donk and fitting it to the other to check whether the problem follows the ECU or not and possibly be able to have the error code reset on the dodgy unit in the another position....

Source

I think this is the right picture. Item 25 (the box above the filter canister). Confirm that OP?

Dear All, the ECU is not working...we have already swap between engines...

Best regards and thanks for the support.

Nicolas.

Thanks for letting us know.

Do you have any idea what the cost will be to replace it?

I wonder what made it fail in the first place?

Dear all, finally I replaced the ECU and now all is working again. Thanks for the support. Best regards, Nicolás

Thanks for the update.

What was the cost?