New Diagnostic Software for MBE ECU
Discussion
Help!!!! if possible for anyone smart out there. Ive read all the posts on Diagnostics. Couldnt find a lead only the 2 pin...so have directly plugged into the D socket on the MBE ecu. ending with the USB lead. Have downloaded OLIs newer software and tried configering the ports but still nothing? wont connect to the ECU ive a 2000 W tuscan and running windows 10 off laptop...at wits end ha
Hi EvoOlli, I downloaded your software Sat while trying to help a friend with a recalcitrant Cerb (4.5) on an S plate.
We had been using the TVR software previously but wanted a second opinion! Very impressed with yours BTW!
I'll kick this off with a simple {dumbo} question before getting into the complex bits.
Q) When the engine is OFF, ignition on the diag soft connects (both) fine, however readings that i would expect to be static are changing. These being:
Lambda readings (small change),
battery voltage (jumping between 12.4 & 11.8)
temp readings (+- 5Deg)
+more
As the car is suffering an intermittent MIL issue would i be correct in thinking the ECU is Duff?
The battery reading jumping about was particularly concerning so I suspected a dodgy earth, so we had the chassis ground between battery and starter off and also the one in the cabin under the radio. cleaned, reassembled but no difference.
I'll stop there and see what you guys think & may suggest so far
Cheers,
Carl
We had been using the TVR software previously but wanted a second opinion! Very impressed with yours BTW!
I'll kick this off with a simple {dumbo} question before getting into the complex bits.
Q) When the engine is OFF, ignition on the diag soft connects (both) fine, however readings that i would expect to be static are changing. These being:
Lambda readings (small change),
battery voltage (jumping between 12.4 & 11.8)
temp readings (+- 5Deg)
+more
As the car is suffering an intermittent MIL issue would i be correct in thinking the ECU is Duff?
The battery reading jumping about was particularly concerning so I suspected a dodgy earth, so we had the chassis ground between battery and starter off and also the one in the cabin under the radio. cleaned, reassembled but no difference.
I'll stop there and see what you guys think & may suggest so far
Cheers,
Carl
The first i would check is the power supply of the ECU. Don't know the Cerbera, but in the T-Cars there is a 'big' fuse in the passenger compartment between the battery and the Fusebox. In my Sagaris the connectors of this fuse where corroded and I had around .5V to 1V lower voltage then the battery, despite the thick cable running from battery to fuse box.
So start to check the supply to the fuse box and the relevant fuses to the ECU. The voltage should be stable.
So start to check the supply to the fuse box and the relevant fuses to the ECU. The voltage should be stable.
Thanks for replying so quickly, much appreciated, its MOT time this week
I thought the values should be static too. especially battery voltage with nothing on.
We did go over the connector to the ECU (which has had recent garage interaction) but all appeared good.
I will check further into the power rails of the car.
Is their an internal reference or regulator in the ECU that could be faulty/dry do you know?
I thought the values should be static too. especially battery voltage with nothing on.
We did go over the connector to the ECU (which has had recent garage interaction) but all appeared good.
I will check further into the power rails of the car.
Is their an internal reference or regulator in the ECU that could be faulty/dry do you know?
There should be a regulator inside the ECU, but IMHO it would be 'behind' the input voltage sensor you can read.
Do you have a Voltmeter ? You could for example measure between Plus of the battery and the Supply line of the ECU. Best to do this under load because if there's a contact problem, it will only be visible if there's load on the connection.
Do you have a Voltmeter ? You could for example measure between Plus of the battery and the Supply line of the ECU. Best to do this under load because if there's a contact problem, it will only be visible if there's load on the connection.
Thanks, There is an internal reference which when measured is squeaky clean. From what we can tell the A2D is inbuilt to the uProc via a MUX. so either the MUX is faulty or the A2D input on the uProc. All voltages measure good, but the diag has fluctuations.
Thankfully it passed the MOT, so now we have another year to fix/replace the ECU.
Cheers,
Carl
Relatively new to TVR ownership but learning to be practical and methodical fast. Love the Tuscan but need to understand the internal workings myself now. Hence, realised that the fantastic Ollie had written some software that helps us to unbox some of the mysteries. Was hoping to download it to investigate but it seems the link is broken or maybe Ollie has taken it down for some reason. His car list says Aston Martin now so maybe he's had enough??? Anyways, wondered if anyone could either squirt a zip file to me or point me to where I can now get hold of it now please... Happy to pay as would like to get back on the road before my holidays and garages are too full to look at it!!
https://drive.google.com/file/d/1CZfySvSD1G4dHXiaD...
Hello, you don't have email option on PH, please try this link, you should be able to take a copy.
Hello, you don't have email option on PH, please try this link, you should be able to take a copy.
DuncanM said:
https://drive.google.com/file/d/1CZfySvSD1G4dHXiaD...
Hello, you don't have email option on PH, please try this link, you should be able to take a copy.
Good point wrt e-mail. Many thanks indeed for the link. Look forward to getting under the hood.Hello, you don't have email option on PH, please try this link, you should be able to take a copy.
Been in holiday, so wasn't able to answer....
The link
http://www.wiechens.de/mbetool/mbetool.zip
works for me. Can someone confirm that ?
The link
http://www.wiechens.de/mbetool/mbetool.zip
works for me. Can someone confirm that ?
Pretty sure that if a throttle pot is out of a "comfortable" range the ECU wont reset it.
Something like 12 % up to 18% ish iirc. Outside of this the ECU is suspicious (rightly so) and so wont re-baseline the pot.
One of you pots is miles out (28%). Moved? Loose? What's the lead up to this?
Something like 12 % up to 18% ish iirc. Outside of this the ECU is suspicious (rightly so) and so wont re-baseline the pot.
One of you pots is miles out (28%). Moved? Loose? What's the lead up to this?
I've tried the old pot, the holes are slightly larger so can manipulate it to approx 20% at closed position but it still wont allow me to reset the parameters to 15%, the spindle positions on front and rear pots look to be very similar in orientation. Had to adjust No6 throttle very slighty to to increase the flow, but is was only gnats knacker from 5kg/h to 6kg/h, Very strange never had an issues before, thanks
Iirc the balance springs can go soft but think that just lets the end most butterfly hold open too far which is not what you are seeing (if I read this right)
Everything else is absolutely locked in place by flats on shafts etc etc. So how on earth can it be over rotated at idle. Plus your air flow is Bob on. Mind you the rotational difference between 15% and 20% is not much. I assume if you plug in the loose / spare pot without bolting it on, it shows a very low %?
Everything else is absolutely locked in place by flats on shafts etc etc. So how on earth can it be over rotated at idle. Plus your air flow is Bob on. Mind you the rotational difference between 15% and 20% is not much. I assume if you plug in the loose / spare pot without bolting it on, it shows a very low %?
EvoOlli said:
That link is working thanks. Gassing Station | Speed Six Engine | Top of Page | What's New | My Stuff