TAMD 75 EDC problem

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Newbroom

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Can anybody help my Broom 450 has developed a fault with the port engine. For no apparent reason it disengages the drive and increases the revs to a 1000 revs. Stopping the engine and clearing the fault codes it will immediately restart. and might be alright for 5 minutes or 2 hours before it does again sometimes it can do it 6 or 7 times in space of 40 minutes other time run for three or four hours.

The edc panel shows a fault of 2.7 which is a potentiometer or wiring fault. I have the module between the throttles already done and I have replaced that in case it was that at fault. and no difference.

I tried swapping the wiring between the throttle potentiometers over from one side to the other but the fault stayed with the same engine.
I have disconnected every connection between the throttles and the engine and after cleaning them made sure that connection appears OK.

Nothing has made any difference anybody any other ideas as I am supposed to be leading our club cruise across to Holland on Saturday and I don't want to go with this hanging over my head but I don't want to let these people down either.

Dave
 
Newbroom said:
Can anybody help my Broom 450 has developed a fault with the port engine. For no apparent reason it disengages the drive and increases the revs to a 1000 revs. Stopping the engine and clearing the fault codes it will immediately restart. and might be alright for 5 minutes or 2 hours before it does again sometimes it can do it 6 or 7 times in space of 40 minutes other time run for three or four hours.

The edc panel shows a fault of 2.7 which is a potentiometer or wiring fault. I have the module between the throttles already done and I have replaced that in case it was that at fault. and no difference.

I tried swapping the wiring between the throttle potentiometers over from one side to the other but the fault stayed with the same engine.
I have disconnected every connection between the throttles and the engine and after cleaning them made sure that connection appears OK.

Nothing has made any difference anybody any other ideas as I am supposed to be leading our club cruise across to Holland on Saturday and I don't want to go with this hanging over my head but I don't want to let these people down either.

Dave
Click to expand...
Phone call on way
 
Just an update on this, Big thanks to Volvo Paul for all his help. Cleaned all the connections on all the joints checked that the modifications to the loom were done and checked all the gearbox switches. Re calibrated everything . Somebody also suggested unplugging the big red connector to the ECU, Something Cured the problem but didn't know how or what had done so,
While away in Holland the other engine started doing exactly the same thing.
This time started with the ECU plug and being on the starboard engine was easier to see and get at. On pulling the plug it was obvious that it had dirty contacts, cleaning it all up and a good spray of contact cleaner . Eureka no more problems.
Any body else starts having any problems with there EDC or perhaps EVC as well start by cleaning that plug. I am now convinced that was the problem on both engines.
Might just save you 4 days of fruitless checking and testing as I did and numerous phone calls plus nearly a £1000 to the local Volvo dealers.
Dave
 
We've had quite a few 60/70 series EDC engines as jobs and they are ALL starting to get these problems. I think it's an age thing.

As Paul did, it's just a matter of going through all the connections.
 
Good afternoon,

I have currently a Fairline phantom 46 equipped with 2 X TAMD 75P Volvo Penta engines.
Last summer I had the same error code 2.7 (potentiometer) on the EDC panel.
The problem is that one of the engine suddenly drops in RPM or that one of the engines keeps on going in forward, while the command is Neutral.
I contacted the local Volvo Penta dealer in Antwerp (Belgium). They didn't really know the exact problem and started replacing things and continued searching for the issue. Now a couple of thousand euros later the problem still isn't fixed and I'm tired of the Volvo guys.
Today I found this forum and saw that more people are having the same issue.
If I understand it correctly, the problem would be in the wiring and ECU plug?
Is it possible that someone could give me a more compleed explenation on how to fix this problem?

Thanks in advance,
Frederik V.
 
Hi, as far as I can make out most people have a different error code to you , 6-2 from memory. My problem is that s/board engine drops to tickover in neutral and does not respond to the throttle, reconnect and all is well for another week, month or longer. As I said on the other thread I have been trying to sort this for years and know one seems to be able to get to the cause.
Neil
 
I think that the error code I get is 7-2 and the engine goes into neutral and the engine rev 1000RPM
 
Last edited:
Just checked my error code is always 6-4 MS unit/potentiometer. We have checked wiring many times, switched MS units made no difference, will switch ECU's next.
Yes engine drops to 1000 revs and neutral.
 
FrederikV said:
Good afternoon,

I have currently a Fairline phantom 46 equipped with 2 X TAMD 75P Volvo Penta engines.
Last summer I had the same error code 2.7 (potentiometer) on the EDC panel.
The problem is that one of the engine suddenly drops in RPM or that one of the engines keeps on going in forward, while the command is Neutral.
I contacted the local Volvo Penta dealer in Antwerp (Belgium). They didn't really know the exact problem and started replacing things and continued searching for the issue. Now a couple of thousand euros later the problem still isn't fixed and I'm tired of the Volvo guys.
Today I found this forum and saw that more people are having the same issue.
If I understand it correctly, the problem would be in the wiring and ECU plug?
Is it possible that someone could give me a more compleed explenation on how to fix this problem?

Thanks in advance,
Frederik V.
Click to expand...
I’ve been on a job .
Same fault codes , occurs about 40 minutes after running but only from the lower helm
I have spent hours on this job to the point of fitting new looms .

The boat has 2 SPM modules one at each helm , I disconnected the lower helm module, it has not failed since.
 
volvopaul said:
I’ve been on a job .
Same fault codes , occurs about 40 minutes after running but only from the lower helm
I have spent hours on this job to the point of fitting new looms .

The boat has 2 SPM modules one at each helm , I disconnected the lower helm module, it has not failed since.
Click to expand...
Hi, working in Sweden with EDC-problems and have 2 TAMD 75 P-A that have the same issue describe above. The symtoms are that port engine is going up and down in speed. From 550 to 1200 or more. The time can be from start directly or after 10-12 min. Have you tried to shift SPM unit between the engines ? If yes results? The problem above can/will it be that the SPM box is broken?

Regards

Stefan
 
n.herring said:
Just checked my error code is always 6-4 MS unit/potentiometer. We have checked wiring many times, switched MS units made no difference, will switch ECU's next.
Yes engine drops to 1000 revs and neutral.
Click to expand...
Yes I know this is a very old post but since I have the same problem with a 6.4 flashcode (and the green lamp on SPM is flashing 3) I hope you solved your problem and could give me a hint on what to do.
 
JanBanan said:
Yes I know this is a very old post but since I have the same problem with a 6.4 flashcode (and the green lamp on SPM is flashing 3) I hope you solved your problem and could give me a hint on what to do.
Click to expand...
Yes still ongoing, happens a few times a year. If I have my eye on the control I can see the light flashing and reconnect to stop it happening. Hoping to get it sorted this year.
 
Its a hard problem to track down.
Certainly cleaning the ECU plug helped on mine but the problem kept on coming back. Volvo Paul has found that the SPM modules can be the fault on a twin helm boat.
Mine is single helm. I still don't believe it is an ECU fault which is most Volvos dealers first stop.
The Volvo modification to the harness plug where three wires are taken out of the plug and re-joined permanently is a suspect
I have now by passed that plug and joined all the wires permanently and have had no further problems. This was 6 months ago so fingers crossed.
 
Newbroom said:
Its a hard problem to track down.
Certainly cleaning the ECU plug helped on mine but the problem kept on coming back. Volvo Paul has found that the SPM modules can be the fault on a twin helm boat.
Mine is single helm. I still don't believe it is an ECU fault which is most Volvos dealers first stop.
The Volvo modification to the harness plug where three wires are taken out of the plug and re-joined permanently is a suspect
I have now by passed that plug and joined all the wires permanently and have had no further problems. This was 6 months ago so fingers crossed.
Click to expand...
Yes think that is our next line of attack, to be honest it's been so long I have forgotten what we have done.
 
I'm having a very similar issue- single helm, twin engine, been having problems with the starboard engine for years.
Cruising along, suddenly starboard gearbox in neutral & engine at 1000rpm, code 2.7.

This happened again yesterday, cleared the code and got going again for a minute before it happened again.
Then we got under the dash, cleaned the connectors going to the throttle/shift unit, reset and didn't have any issues the rest of the day.

I'm thinking about removing the extra spooled up cable under the controls and soldering the wires together to eliminate the connectors...

What is the "Volvo harness modification" mentioned here? @Newbroom @volvopaul

"The Volvo modification to the harness plug where three wires are taken out of the plug and re-joined permanently is a suspect"

Appreciate all input!
 
harrisonerny said:
I'm having a very similar issue- single helm, twin engine, been having problems with the starboard engine for years.
Cruising along, suddenly starboard gearbox in neutral & engine at 1000rpm, code 2.7.

This happened again yesterday, cleared the code and got going again for a minute before it happened again.
Then we got under the dash, cleaned the connectors going to the throttle/shift unit, reset and didn't have any issues the rest of the day.

I'm thinking about removing the extra spooled up cable under the controls and soldering the wires together to eliminate the connectors...

What is the "Volvo harness modification" mentioned here? @Newbroom @volvopaul

"The Volvo modification to the harness plug where three wires are taken out of the plug and re-joined permanently is a suspect"

Appreciate all input!
Click to expand...
They fitted an SPM it’s a warranty recall but the unit was or still is out of production, this was to eliminate false gear shifting .

2/7 sounds like a break in the wires to either gearbox solenoid, check to see if your engines have had the wiring mod at one of the 2 eight pin edc loom connectors, they are the ones side of exhaust manifold near the black electrical box , you will see if mod carried out 3 of the 8 wires cut from the plug and mounted with crimp connections, over the years they become loose and require the job repeating .
I know from my previous boat with the 75 p engines in I used to get this fault code .
 
After living with this problem I am convinced the problem is in the loom connections. I thought I had cracked it and went for 18 months without a problem. It has now com back.
New looms are no longer available.
I think that I am going to cut bypass one Volvo harness connection at a time and directly solder the cable together.
 
Newbroom said:
After living with this problem I am convinced the problem is in the loom connections. I thought I had cracked it and went for 18 months without a problem. It has now com back.
New looms are no longer available.
I think that I am going to cut bypass one Volvo harness connection at a time and directly solder the cable together.
Click to expand...
Coastal Rides might have some looms available.
 
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