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References values MEMS3 3 years 5 months ago #189104

BMW proprietary mode
VariablemeanSD
Throttle angle (degrees)4.000.00
Throttle potentiometer voltage (V)0.600.00
Throttle valve statusClosed/ Open
Ignition switchOn
Aircon Fan RequestRequested
Aircon Clutch RequestNot requested
Drive/ Neutral statusNeutral
Security InputHigh/ Low
Aircon switchOff/ On
Alternate Aircon Fan RequestRequested
Intake manifold pressure (V)32.540.50
Stepper position (steps)18.940.12
Engine speed (RPM)776.1221.65
Idle error (RPM)5.2115.89
Vehicle speed (KPH)0.000.00
Coolant temperature (Celcius)82.000.00
Oil temperature (Celcius)76.280.41
Intake air temperature (Celcius)39.000.00
Ambient air temperature (Celcius)-40.000.00
Fuel temperature (Celcius)-40.000.00
Battery Voltage (V)14.220.03
Crankshaft signalokay
Cahaft signalokay
High speed sync losssync loss
Cam input historyinput was high
Cam position (degrees)0.000.00
Crank position (degrees)366.97198.02
Coil 1 Charging Time (usec)2827.000.00
Coil 2 Charging Time (usec)3000.000.00
Injector Firing Interval (degrees)720.000.00
Injector pulsewidth (msec)2.720.06
Injector Deadtime (msec)0.500.00
Fueling feedback correction bank 1 (%)1.040.02
Oxygen sensor oltage bank 1 (V)0.600.18
Fueling feedback correction bank 2 (%)1.020.00
Oxygen sensor oltage bank 2 (V)0.760.01
Oxygen sensor statuse bank 1active
Oxygen sensor statuse bank 2inactive
Requested cam period?
Measured cam period?
Inlet valve open angle?
Inlet valve closed angle?
Closed loop idle control statusactive
Idle speed control test statusNot active
Throttle statusClosed
Engine cranking statusNot cranking
Engine started statusStarted
Engine stopped statusNot stopped
Oerrun fuel cutoff statusNot active
High speed fuel cutoff statusNot active
Fuel pumpOn
MIL LampOff
Aircon ClutchOff/ On
Radiator FanOff/ On
Auxiliary FanOff
o2 Sensor HeaterOff/ On
Engine FanOff/ on
Cruise DisableOff
Purge valve duty cycle (%)0.070.00
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References values MEMS3 3 years 5 months ago #189105

There are quite a few irrelevant data sets in the ISO mode for functions/ parameters that MG Rover did not implement on MEMS 3 - like ambient temperature, fuel temperature etc. Therefore, the numbers for these are largely spurious.

There is little spurious data in the BMW proprietary mode - although the inlet cam position data is irrelevant for non-VVC engines (hence the "?"). But not sure why there are still ambient temperature and fuel temperature outputs? Unless this is an error, or this is a hang-over from the ECU's original development??? Perhaps Philip can comment?

The data probably provides a starting point for knowing what normal values might be - although whether this car has a problem or not I don't know! LOL It runs very well, and there are no reported errors, so hopefully all is well. :)

I can get the same data from an MGZS 120, and in the future from a MGZR 105 (MEMS3).

I can also obtain MEMS1.9 data from my two MGFs :) The data you get from MEMS1.9 will be interesting to compare as it is quite an interesting ECU (as the fuel/ignition adaption post shows) :)
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References values MEMS3 3 years 5 months ago #189109

This is terrific stuff Rob.

If you can get the data from your two 1.9 MGFs, I'll build the spreadsheet to match the layout you provide and then add in my own values when I get a chance to do the same measurements. We could then do a mean of the means or range of the means depending what looks to be the most useful.

It looks as though there will be different sheets for different vehicles and MEMS versions as the output fields look to be different - not surprisingly.

I think we could end up with a pretty decent set of reference data using this approach.

Pity we can't upload Excel spreadsheets but they could be passed around via email if necessary. When I saw that .ods files can be uploaded I thought we could get around that but it seems as though you had a problem loading the file I uploaded into Excel. I'm using Office 365 and it seems to work fine with that. When we get a bit further on, perhaps we can investigate the file transfer a bit.
Robin ;)

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References values MEMS3 3 years 5 months ago #189110

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I've added xls and xlsx to the allowed file types, should be able to attach excel files now :broon:
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References values MEMS3 3 years 5 months ago #189111

Great :D

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References values MEMS3 3 years 2 months ago #190219

.

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Last edit: Post by Johnny08.

References values MEMS3 3 years 2 months ago #190261

That’d be really helpful for me too - but at present I don’t have a running VVC.

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References values MEMS3 3 years 1 month ago #190327

See your message box johnny

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Last edit: Post by Follyjunk.

References values MEMS3 3 years 3 days ago #190741

would be great to see some examples from a MEMS 1.9 readouts, here’s my Excel off my MEMS 1.9

File Attachment:

File Name: MEMS 1.9.xlsx
File Size:81 KB
Attachments:
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References values MEMS3 3 years 3 days ago #190743

My post on the previous page (the one with the graph of O2 sensor voltages) is for MEMS1.9

On first glance, my values look fairly similar to yours. I haven't done much playing around with this recently. May get back to it one day!
Robin ;)

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References values MEMS3 2 years 11 months ago #190875

Bump

Home to black Alfa Romeo 159 3.2 V6 Q4 ,green MGF VVC and red MG Maestro T16.

MG - the friendly marque.

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