Volvo TAMD 73/74 and 75 ECU - Cause for concern?

[Imperial One]

I have one that was repaired many years ago and still going strong, it was the turbo boost control sensor I believe so it is possible in the right hands

Who were the right hands please?
We think ours is totally blown on the main processor as it fails to even wink at VP let alone talk to him via his computer.

 

[petem]

The boost sensor is easily replaced. You can see it at the bottom here (it simply unplugs and you can ease it out). What we're talking about here is the encapsulated circuit board.

 

[n.herring]

On mine we knew the part that had gone, yours sounds somewhat worse. As far as I know the guy that did it is no longer interested in getting work, long story but best if I PM you his name, Neil

 

[n.herring]

The boost sensor is easily replaced. You can see it at the bottom here (it simply unplugs and you can ease it out). What we're talking about here is the encapsulated circuit board.

That makes sense, all I knew was that it was encapsulated in ECU, as I have 2 of these I am very interested it how this is resolved

 

[volvopaul]

Has anyone gone the route of an ECU repair company?
When you Google it there are people all over the country offering this service, I know they are working on the car or lorry versions but I can not believe there is a lot of difference in the actual hardware.
If the unit is repaired and the software needs to be reloaded I would think a Volvo dealer would be happy to oblige for a small fee!

I’ve tried every angle but as the board is set in solid silicone no one will touch it , it’s not like a normal ECU board

 

[volvopaul]

I have one that was repaired many years ago and still going strong, it was the turbo boost control sensor I believe so it is possible in the right hands

Boost sensor is a separate part to the board

 

[volvopaul]

I doubt VODIA is sufficiently sophisticated to do that, even if you could remedy the physical fault.

It’s programmed at the factory by Volvo not a dealer via vodia

 

[Imperial One]

It’s programmed at the factory by Volvo not a dealer via vodia

And there in lies our problem - we are constantly going round in circles.
Volvo cannot program what they do not have stocks of and will not build more of.
In short they are calling the shots and it seems they really don't care at all about the many engines they have out there which are potentially uselss if the ECU blows....and they clearly do blow!

I will continue to update the thread as I know or hear more but I am going to be offline from late AM Wednesday until midday on Thursday.

 

[Cymraeg]

I’ve tried every angle but as the board is set in solid silicone no one will touch it , it’s not like a normal ECU board

Is there a truck which has the same block? Whilst the maps would be totally different, might provide a starting point to get the engine idling, and then work from there.

 

[Cymraeg]

Is there a truck which has the same block? Whilst the maps would be totally different, might provide a starting point to get the engine idling, and then work from there.

I have to declare an interest as I have 2 x '73p blocks lurking in the engine bay.

 

[Somerset Jim]

I have to declare an interest as I have 2 x '73p blocks lurking in the engine bay.

as do I - 74P’s.

 

[rafiki_]

Is there a truck which has the same block? Whilst the maps would be totally different, might provide a starting point to get the engine idling, and then work from there.

Truck ECU’s are unlikely to be programmable. Truck manufacturers are paranoid about operators tinkering, having failures then claiming under warranty. Needs a generic programmable ECU and a decent calibrator.

 

[volvopaul]

Truck ECU’s are unlikely to be programmable. Truck manufacturers are paranoid about operators tinkering, having failures then claiming under warranty. Needs a generic programmable ECU and a decent calibrator.

Not a kid with a laptop that can alter the PWM as with most tuning boxes

 

[Newbroom]

Was the engine used in any commercial applications with a Non ECU pump. Could the engine be converted to run mechanically. I think I know the answer but just in case.????

 

[lynallbel]

Have a look on youtube, seem to be a few cos offering ecus etc for truck engine, mainly daf.

 

[Cymraeg]

Truck ECU’s are unlikely to be programmable. Truck manufacturers are paranoid about operators tinkering, having failures then claiming under warranty. Needs a generic programmable ECU and a decent calibrator.

No, but could be reverse engineered to provide basic settings for a programmable ECU if Volvo are reticent on providing settings e.g. get the engine to start and idle, then build in the marine specifics?

 

[jwfrary]

Hi
Not in defence of volvo, I firmly belive in the right to repair but Cummins owners of early engines eg. The qsb 5.9 qsc 8.3 and a few others fitted with smartcraft 1 and 2 will find that a couple of essential ecus are now out of manufacture..
Solution is to replace the whole system monitoring system and main engine ecu needs reprogramming, very expensive and inconvenient considering.
Your in the same boat with iveco aifos as well.

Hope you find a solution to the volvo problem. You might try bartech over East in the UK.

Have to say, dealing mostly with cat, mtu and man parts availibility even for old engines is exellent..

 

[rafiki_]

No, but could be reverse engineered to provide basic settings for a programmable ECU if Volvo are reticent on providing settings e.g. get the engine to start and idle, then build in the marine specifics?

How would you reverse engineer the software? Hardware easy, but thats not the clever bit.

 

[rafiki_]

Not a kid with a laptop that can alter the PWM as with most tuning boxes

Paul, I’m talking proper calibrators who work in the auto sector., either for VM’s or the proper service providers like AVL/FEV/Ricardo/Mahle.

 

[Cymraeg]

How would you reverse engineer the software? Hardware easy, but thats not the clever bit.

Disassemblers/Decompilers.