Volvo EDC problem

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Yabs

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Hi All,

I have Volvo EDC controls linked to KAD 44's. I have recently experienced an issued whereby on selecting reverse (tick over) on the port motor the revs increase to about 1200rpm. Yesterday I also noticed the same engine having a tendency to stick in reverse even when the control lever was moved back to neutral. I did the calibration procedure which seem to sort the issue. I tried the boat again today but on turning on the ignition noted that the neutral light would not light with the control lever in the neutral position. A bit of wiggling of the lever saw the neutral light come on. Then when I tried the boat, selecting ahead (again tick over) resulted in the revs rising to about 1200rpm. It was as if the controls had lost their calibration over night. I again re calibrated which seems to have rectified the fault for now. I would be grateful of any advice of what might be causing this? Which part of the system tells the control panel the boat is in neutral? Is this linked to the actuator?

Thanks

Yabs
 
Sounds like your control level potentiometers might be on their way out. You might find that simply cleaning up the contacts on the back of the pots to the loom does the trick (it did for me a couple of years ago, faced with very similar symptoms) but if it is the pots themselves then iirc they are made by Bosch. (Replacing the entire control head is very expensive). If you go down the route of replacing the pots please post your source here, would be useful in future.
 
I agree with jimmy. Take off the cable and check with a multimeter. The resistance on both at various throttle settings should be near as the same

You could also try vigerously moving the levers back and forward for a few mins. This can smooth out the carbon track.
 
I had a very similar issue my EDC control a while back. I managed to secure a complete new EDC control head off flea bay for less than a hundred quid, and that cured the issue, but full price from VP was mahoosive.
 
I had similar issues with EVC systems controlling VP D12-715s - throttles not consistently engaging reverse, engines not holding synchronization, random changes in rpm, engine alarms, etc. Replacement of both throttle potentiometers/levers seemed to fix problems for a while, but they came back and the advice from VP was to consider changing both helm control units (there are four - two for each engine, one at the helm and one in the engine room). This was done and the problems disappeared - but not a cheap fix. Apparently older generation EVC systems do not like the extreme heat they can be subjected to under the dash in SoF and can fail as they get older - local VP engineer has had same problem with four other boats with same generation of EVC.

Separately to this, I had a recent recurrence of the not engaging reverse issue but this coincided with problems with bow thruster cutting out and was diagnosed as probably due to dead batteries after 7 days out of the water. Replacing all batteries has solved the problem, so may be worth checking other systems before assuming its an EVC fault.
 
DAW said:
I had similar issues with EVC systems controlling VP D12-715s - throttles not consistently engaging reverse, engines not holding synchronization, random changes in rpm, engine alarms, etc. Replacement of both throttle potentiometers/levers seemed to fix problems for a while, but they came back and the advice from VP was to consider changing both helm control units (there are four - two for each engine, one at the helm and one in the engine room). This was done and the problems disappeared - but not a cheap fix. Apparently older generation EVC systems do not like the extreme heat they can be subjected to under the dash in SoF and can fail as they get older - local VP engineer has had same problem with four other boats with same generation of EVC.

Separately to this, I had a recent recurrence of the not engaging reverse issue but this coincided with problems with bow thruster cutting out and was diagnosed as probably due to dead batteries after 7 days out of the water. Replacing all batteries has solved the problem, so may be worth checking other systems before assuming its an EVC fault.
Click to expand...

That's interesting info. The HCU's on the Targa 40 are not actually at the helm though, helpfully - they are down in the mid cabin, so not subject to the extreme heat generated at the helm (being dark-coloured and in the direct sunshine).

Out of interest (and with apols to the OP for the drift) did you take the opportunity to upgrade your EVC version when you replaced all the modules?
 
DAW said:
I had similar issues with EVC systems controlling VP D12-715s - throttles not consistently engaging reverse.

Separately to this, I had a recent recurrence of the not engaging reverse issue .
Click to expand...

Slightly out of context but....I recently had the not engaging reverse thing on one engine on the upper helm, D12-800's. I sorted it by doing the recalibration in the fitting instruction sheet, thought it was worth a try before getting anyone else involved and it has been fine and not missed a command since.

Andy
 
I had issues selecting drive end of last season. All sorts of problems. The shift cable were stiff. Had these replaced and all is fine now. (Except the surging at high revs) :)
 
jimmy_the_builder said:
Out of interest (and with apols to the OP for the drift) did you take the opportunity to upgrade your EVC version when you replaced all the modules?
Click to expand...

No, but mainly because Sunseeker offered significant help with the cost of like-for-like replacement of the helm ECUs under their used boat warranty. Replacing engine ECUs and upgrading to EVC-B/C would have been considerably more expensive so we decided to try the "cheap" fix first and look at a full upgrade as Plan B only if necessary.
 
Hi All, thanks for all the replies, have found that the Port Actuator has got wet, so am trying a lone one at the mo, will update shortly.

Paul JTB is correct it is a Targa 40 on DPE drives.

Regards

Sacha
 
Right,

Is there a fault code?

1200 rpm is limp mode so ther must be a fault code , now we know it's stern drive it could be,

The shift actuator as there is no neutral light it thinks it's in gear so disconnect the shift cable from the actuator , try the cable by hand without engine running to see how stiff it is engaging both gears.
The. Start engine and try in and out of gears, if the fault disappears I'd say it's a shifting overload and you will need anew cable fitting.
I've also had this before when there is a supercharger clutch overload whereby the clutch is burnt out taking too much current, this happens on a stone cold engine as the clutch engages at cold start and trips out at 40 deg C .
Plenty to go at there. Have you checked both fuses at the black box?
Although engine is EDC and is designed to give its faults as a code the parameters to fault find are limited and as the engines have aged faults like shift actuators and sc clutch fault finding is purely diagnosed on experience not what it says in the book.
 
Thanks Paul, there are no fault codes. I can get more than 1200 rpm it just seems the engine revs when I select gear. Will have a closer inspection, including checking the cable. When you say both fuses at the black box I take it you mean the box on top of the engine? I have checked those and both are ok.
Regards
Yabs
 
Yabs said:
Thanks Paul, there are no fault codes. I can get more than 1200 rpm it just seems the engine revs when I select gear. Will have a closer inspection, including checking the cable. When you say both fuses at the black box I take it you mean the box on top of the engine? I have checked those and both are ok.
Regards
Yabs
Click to expand...

It will rev because it's going into limp get you home mode as there is a problem, remove the shift lever assembly, swap the pots over and recalibrate , if the problem to that engine goes it's the pot sensor but they don't fail that often.
 
Sorry to resurect this thread but I have the same problem on my kad300 stern drive boat.I have changed throttle potentiometer and still persists.
Faults are intermittent neutral light,surging in gear on tickover
It won't let me complete calibration,but it's not showing any fault codes

Regds ash
 
zt260 said:
Sorry to resurect this thread but I have the same problem on my kad300 stern drive boat.I have changed throttle potentiometer and still persists.
Faults are intermittent neutral light,surging in gear on tickover
It won't let me complete calibration,but it's not showing any fault codes

Regds ash
Click to expand...

Forgot to say this is only on the port engine but it won't let me confirm calibration on both throttles

Regds ash
 
If it won't let you into calibration mode you have a fault code not allowing you to do so .
Find the fault code first then re calibrate . Do this to the letter as per the manual .
Try first by clearing the fault code by turning off the ignition to the stop position, hold down the D button then turn on ignition, wait 3 seconds before releasing button, read code , if 1/1 you can then recalibrate. Go into calibration mode , same procedure but hold down D and N together
 
Thanks Paul it lets me go into calibration mode but won't acknowledge when I have finished after pressing neutral twice for 3 seconds

When I have done this it allows me to start the engines but port side is doing the same as OP problem

Regds ash
 
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