This engine has ran 5 hours+ on the dyno for tuning and on circuit, however this issue has just started, all the forementioned were on older versions of v3 - I noticed it happen in 3.30 and I have tried 3.31. Not sure if it is a configuration issue, but it is repeatable.
Full throttle pull through one gear, then change gear, back to full throttle - the engine feels like it turned off…
DBW Target remains at 100%
Pedal Position is still 100% DBW DC % drops lower? Confirmed by TPS % and TPS Voltage dropping, along with MAP dropping.
your max valid pps check voltage is 1.92 and on log is 1.95
just to explain max valid voltage is not your calibration and should be set higher than actual voltage
max error is used for check between main and check voltage doesn’t applied to max valid voltage at leas i understand like that
In some situations DBW target was at 100%…Output DC went to 100% but TPS just moved to 16%. Usually a stuck throttle thing, but it was reproducable just in higher rpms; never in standstill.
I also had a strange electrical phenomen with one AUX output.
Afterwards i upgraded my ground wiring (i just had 3 out of 4 ground PINs on the EMU connected; all combined in one line). Connected a big wire to the last ground PIN and connected it to chassis and never had problems again since that.
Probably my ground setup was undersized (or with a small hidden damage). Maybe u have a similar problem.
As Greg wrote there is a problem with the PPS settings.
The ECU see voltage out of the allowed range.
When there is a grounding problem the noise will like increase with the RPM and other stuff that increase electric load.
Aslo the ECU process all data every 2ms, and log is 25, 50, 100, 250Hz depends on the channel. So some peaks on analogs channel can be not visible in log.
I’ve just added the following sentense to the DBW Help:
In most cases, throttle operation issues result either from problems with connecting the throttle motor and sensors or from the configuration of the throttle position sensors or pedal position sensors. If an error code for DBW (Drive-By-Wire) is visible in the Check Engine channel log, verify the statuses of the sensors: TPS main status, TPS check status, TPS check error, PPS main status, PPS check status, PPS check error.
Thank you all for the helpful replies. This now makes sense, I didn’t realise the “Check Voltage Min/Max” required some overhead due to potential variances. Looking at the log as you describe (and previous ones where this happened), it is the same fault every time.
This actually did happen with PPS check disabled too… but at that point the main PPS voltage was higher than the main check voltage max too, so again it would error. I think my max/min voltages for TPS and PPS are too tight, but now I know, i will move them slightly and it should be resolved.
What is the default action if DBW error? Drop DC to 0%?
@Jadzwin_ECUMASTER is the Check Engine field a bitfield if you export it to CAN? I will log it on external device if so.
