Question for the ETM and ME7 experts - RESOLVED Topic is solved

[jmartin919]

So the car runs with the ETM reading 0%? Does your current ETM have a yellow or white label?

[Twarr12000]

So the car runs with the ETM reading 0%? Does your current ETM have a yellow or white label?

Yes the car runs great for a couple of miles, then, when the TP goes to 0, very poorly and won’t accelerate beyond 2500-3000 rpm even in Park.
The ETM has a yellow label.

[jmartin919]

Maybe time for a 2014+ white label contactless ETM. Have you seen this thread?
https://www.swedespeed.com/threads/1999 ... al.603971/

[scot850]

I have read that thread and it has useful information on the subject but is not 100%. I thought I had an ETM issue on one of my cars and it was the pedal that was the issue not the ETM. Small sample size I appreciate it. I also agree with the issue if you can find a Volvo reman unit from 2014 on it is great but typically hard to find as few are willing to pay the cost of one. If you find one grab it as it has the contactless sensors (Sacer) that Xemodex use for their rebuilds.

I am sure that ETM circuit boards may go bad, but I heave never heard of one fail. It is almost 100% the position sensors that fail/wear out.

I have not had a chance to look the ETM over to check there is no damage to the unit from sitting out. I cannot test it, but when I pull a unit I generally pull it from an accident damaged car or one where the belt has snapped to try to minimize that being the reason the car is in the junkyard in the first place. This came from a car with the cylinder head in the trunk so I am assuming it was a head fail from either a belt or valve/head gasket. PM me if you want this still. I will hold it for you and I'll get to cleaning it this afternoon while I have a chance (it needs done either way) and confirm it has no physical damage to the casting or wiring. I will try to find a shipping cost with Canada Post to you if you PM me your Zip code.

I know you are trying to get the peddle assembly from lavalexi so do you want to wait on trying that first?

As to cost of the unit we can chat on PM about that. It may surprise you in a good way!

Neil.

[scot850]

So I cleaned the Xemodex LPT ETM I pulled from a 1999 V70 XC a couple of days ago. I am now wondering about this. I had a look on Xemodex's website and it was not of much help other than the label they use is completely different to the one on this unit making me wonder how old it actually is. The other think is I thought they swapped the position sensors on both ends of the unit, but this one only seems to have it on one end and the other end has a Magneti Marelli one on the other end??

I am going to try to contact Xemodex tomorrow to find out how old this repair is and why the different sensors. The other think is had been painted with a silver paint (the castings tend to go blotchy with age) but a lot of it has gone crumbly which makes me think this has a fair age to it. In fact, just remembered my car has a Xemodex unit on it so I can check for similarities as it was fitted before I bought it in 2012.

Xemodex sticker

ETM unit

Xemodex sensor one end

Magneti Marelli sensor on other

Unit cleaned internally

Other side of throttle plate

Neil.

[Twarr12000]

I’m sure your unit is better than the original Magneti Marelli one. Let us know what you find out.

Meanwhile, I removed the ETM, reconnected the connector and watched the data stream as I physically moved the throttle plate. After a few seconds of this, it froze at 97%. Just like when it’s installed on the car - which should rule out the accelerator module. So now I’m thinking I got a second bad ETM, or it’s an ECU, wiring or software issue.

[scot850]

It is worth checking the ETM and TCU module connections in the box. When I bought a 2000 V70 NA a few years ago, it had a lot of warning lights and transmission lights as well with the orange arrow of doom. I tried checking everything and found a bad ABS module and that fixed a lot of the issues, but not the trans ones. I ended up taking it to the dealer and they found it was corroded/oxidised contact pins in the TCU. They removed it and cleaned it with a Wurth branded contact cleaner they use. They then carefully seated and removed both TCU and ECU a few times to clean the pins. Issue resolved. So it might be worth trying that is nothing else to eliminate it from the equation. I'll let you know how the chat with Xemodex goes.

Neil.

[scot850]

I spoke to Xemodex, but they were unable to check. They have no record of that unit so they think it may have been sold through a 3rd party supplier.

I did go look at the one on my own car and it is hard to see other than the label. The label layout is the same, but the part number is different in the last digit where this one is an A and mine ends in AO. Possibly the LPT v's HPT difference. I have asked if the serial number is sequential for all units they sell/repair. If they are then this one is even older than the one on my car.

This one is: 41208320

The one on mine is: 211091042

Xemodex way back sold through FCP and others, then they only dealt direct for a while.

Mine has the same split of the 2 sensors. I have not had any issues so far with it, but then my car has also not done much mileage either.

Neil.

[jmartin919]

Doesn't seem like there would need to be more than one sensor.

[Twarr12000]

Doesn't seem like there would need to be more than one sensor.

I agree only 1 sensor is really needed. Reading the Bosch documentation one of the most important considerations when designing the ME variant was to not have any combination of likely fault modes result in a runaway engine.