Volvo Penta 5.7 Gi-E ECM problem?

[Ingeinan]

I have an Glastron 249 from year 2005. It is powered by a Volvo Penta 5.7 Gi-E engine.
There has been two problems that I relate to the ECM module.

Problem 1
One year ago i had problems with the IAC that doesn’t regulated as is should. I positioned the IAC in a position that had right idling speed and disconnected it from the wiring. I’m not sure if this can cause any damage or how it affects the engine, but it has worked well this summer.
I changed the IAC to a new one without any change. I have checked the wiring and also measured the signals with an oscillator connected. The pulse rate changed when the engine had higher speed, but it was not easy to find out if the voltage and current was at right levels. I don’t have documentation in detail over the function of the IAC and ECM only the regular documentation.
Is this caused by a faulty ECM or something else?

Problem 2
Next problem occurred one week ago when we were out at the lake, the waves was high and it was a bumpy trip. Suddenly the engine stopped and the fuel pump stopped. I have changed the relays and checked the safes. The fuel pump doesn’t start when I turn the key. When I connect a wire from the ECM connector at pin 6 to minus at the battery the fuel pumps starts. This makes me to suspect that there is something wrong with the ECM. I have earlier checked the connections at the map to earth and it was ok without any resistance. Is there anything else that is involved in the start of the fuel pump when the key is turned at its first position?

Thank you for all possible help.

Regards
Andersson from Sweden

 

[gbeltran]

Re: Volvo Penta 5.7 Gi-E ECM problem?

Boatinfo - The library, containing manuals, brochures and other technical documents from the last hundred years!

Go there, in the library you can find EFI diagnostics. I don't know what you are calling a MAP sensor because that is not adjustable. (manifold absolute pressure) Maybe you are talking about the TPS or throttle position sensor.

 

[Ingeinan]

Re: Volvo Penta 5.7 Gi-E ECM problem?

Sorry i have mixed up MAP with IAC valve. It is the IAC valve I meant instead of MAP. I have edit the question now.
Thank you for the link. I have started to read about it.

Best regards
Andersson

 

[muc]

Re: Volvo Penta 5.7 Gi-E ECM problem?

Problem 1
You say it has worked well this summer and no change after IAC replacement. Is there a problem now?
Problem 2
There is no pin 6 on the MAP.
There is a pin 6 on the ECM J1 connector that when connected to battery minus should run the fuel pumps.
You now need to check for a very good battery minus on ECM J1 connector pins 13,14 and 29.
Check for very good battery positive on ECM J2 connector pin 1 and very good key on battery positive ECM J2 connector pin 19
All these pin numbers come from Volvo Penta service manual 7742218
I couldn’t find a wiring diagram for your 5.7Gi-E so I used the 5.7Gi-C wiring diagram ---- I think they are the same but you confirm wire colors to be sure.

 

[Ingeinan]

Re: Volvo Penta 5.7 Gi-E ECM problem?

Thank you very much Muc,
This was really good information.

Problem 1
The problem is not solved the new IAC didn't solved the problem so I returned the new one and replaced it with the old one again. It is in position but not connected to the electrical socket. The piston is locked by purpose, in a position were the engines idle is ok. I'm not sure if this will result in higher gas consumption or harm the engine in some way? Is it anyone that know?

Problem 2
Yes it is the pin 6 on the J1 connector that i meant. The fuel pumps runs when it is connected to battery minus. I will check the other pins for a very good battery minus on ECM J1 connector pins 13,14 and 29 also very good battery positive on ECM J2 connector pin 1 and very good key on battery positive ECM J2 connector pin 19.


I assume that both problems can be related to the same source. I believe it has to do with a bad or lost, battery minus.

I will let you all know about the result after further checking.

I have also tried to find a wiring diagram for Volvo Penta 5.7 GI-E but without success anyone that know were i can find one?

Thank you all for all great help

 

[NoExcuses]

Re: Volvo Penta 5.7 Gi-E ECM problem?

Your number 2 problem sounds like something I had going last year. You might want to look into this service bulletin:

http://www.marinepartsexpress.com/V... V01 Fuse Relay box replaced.pdf

 

[Ingeinan]

Re: Volvo Penta 5.7 Gi-E ECM problem?

The link leads to a drawing were isolator bushings for mounting the box to the engine is made from a kit. Is this to prevent the problem? Will it help me when it's already has happened? Is the link the one you meant?

 

[NoExcuses]

Re: Volvo Penta 5.7 Gi-E ECM problem?

Yes, this is the link I meant. If your fuse/relay box is already faulty, you will probably have to replace it. The vibration isolators will only help extend the life of the new box.

The thread below is where I learned of the corrective action last year. I was able to troubleshoot the problem by swapping parts with my other engine's fuse box. I went ahead and changed both boxes and I haven't had a repeat of the issue since then. I wish I could tell you a way to troubleshoot without swapping in a new one.

http://forums.iboats.com/volvo-pent...mitant-fuel-pump-wind-up-ignition-577110.html

 

[Ingeinan]

Re: Volvo Penta 5.7 Gi-E ECM problem?

Thank you for clarify this for me.
I think the relay box is ok because the fuel pumps starts when I connect pin 6 at connector J1 to battery minus. The fuel pumps doesn't starts when connector J1 is connected and I turn the key.
It's good to have all possible thoughts when I start to work with it again.
It's good to know all weak points.

Thank you very much