Volvo EMS 2 Engine Shutdown (DSE Canbus Controller)

[rovguy]

Hi ,have read the threads on here ref the title of this thread ,have a TAd734GE with DSE controller .
First event was engine shutdown due to clogged air filters (indicator showing green on the filter housing )the message shown was 'engine underspeed ' but also showed an 'engineCAN bus' message as well .Sorted the filter and restarted then shut down when scrolling through messages -estop and engine CANbus message on screen . Reset and ran for a day and then upon being started in the morning it shut down after about ten minutes with the 'engine CAN bus' message.
Checked all connectors and CAN bus fuse all ok .power to all boards (green lights evident)
Have had the main board replaced about a year ago (after about 70 hours of running !)
Have contacted SDMO but not much use really -suggested disconnecting battery for 10 minutes ? did it -no change
The set is a hire unit hired by a third party for our use by the way
Any help would be deeply appreciated
Cheers
Neil

[wellandpower]

Do you have a DCU (Display Control Unit)? Plugging in a DCU and trying is good test.
With the breaker open and running the engine see if the CAN link has really failed or not - it will give you the warning on the DCU.

If not then whoever you got it from should be able to plug in there DCU or Vodia tool and have a look.

[merryengineer]

You can also disconnect the CAN connections from the DSE controller and measure the resistance of the CAN link. It should be able 140 Ohms IIRC.

[merryengineer]

What welland said also, a DCU is an excellent piece of equipment for sorting these things out. Where are you based by the way?

[wellandpower]

Also a quote from another similar issue that might help:

"
This sounds very much like a case we had here in UK.
In this case the engine was run using our CIU (same as a DCU but needs the OEM to fit gauges, switches etc., (but critically it also has the back-up CAN)). The complaint was that the engine would run but no gauges. The dealer spent a lot of time looking for the broken connection but none could be found.
The all of a sudden the gauges started working. So he thought "job done", packed up his tools and jumped in his van. He was on the point of going home but he thought "no" he had not found anything. So he got out of his van and eventually found the fault. On the 8 pin plug connecting the engine to the outside world there was a misplaced pin. This pin would slide down the OUTSIDE of the socket. This allowed it to sometimes have a good connection, and sometimes a bad connection. The pin was just rubbing on the side of the socket. He adjusted the pin so it went cleanly into the socket and all is now well."

So I would try removing the connection and checking the pins e.t.c. and see if this helps.
Probelms like this are very hard to find though, as they can be OK when you test them and have a fault when running / every so often!

[rovguy]

Do you have a DCU (Display Control Unit)? Plugging in a DCU and trying is good test.
With the breaker open and running the engine see if the CAN link has really failed or not - it will give you the warning on the DCU.

If not then whoever you got it from should be able to plug in there DCU or Vodia tool and have a look.

Hi ,thanks for the reply ,the guys this is hired from by our main contractor cant get to us due to weather (OIL rig in the Caspian sea ) they have the vodia tool but not sure when they will get here . The engine wont start so cant try your test .
Cheers
Neil

[rovguy]

Hi thanks for the reply , is this the cat 5 etherer net cable you refer to as the CAN connection ?

[rovguy]

Sorry forgot to answer your question ,am sat on a rusty old oil rig in the Caspian sea ,seas raging so no service eng can get to us ! oh joy we have been chasing this for a couple of days to no avail ,we suspect its a dodgy connection but have checked everything and cleaned and reseated .

[rovguy]

Hi ,have checked this connector ,did suspect it as its in the path of diesel spillage when changing filter ,it doesnt seem to sit quite right so will go and check it again now
fingers crossed

[wellandpower]

Here is the picture of the connection harness most often used (its a Volvo part).

http://www.wellandpower.net/forums/s...nnection-Wires

The plug on the top right of the top picture should be the one connecting to the engine, it should only go in one way and is quite a nice fit normally. Fairly easy to push in, but sometimes does take some pulling out.

Often this harness is cut halfway approx and inconnected with the panel rather than using another connector.