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 MEMS 2J 
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 Post subject: MEMS 2J
PostPosted: Mon Oct 06, 2014 2:31 pm 
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Please post success or failure (and on what vehicle and whether VVC or not) with MEMS 2J here.

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 Post subject: Re: MEMS 2J
PostPosted: Mon Oct 06, 2014 2:41 pm 
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A known issue with MEMS 2J is that the VVC parameters are not yet included.

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 Post subject: Re: MEMS 2J
PostPosted: Wed Oct 08, 2014 6:46 pm 
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Appears to work correctly on my 1998 mk1 VVC mgf!

Connection is a bit slow and there was some lag on the live data display.

Cleared an error code that I wasn't aware of but didn't expand the error code - 34.

Looking really good :) :thumbup:


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 Post subject: Re: MEMS 2J
PostPosted: Sat Oct 25, 2014 12:59 am 
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Success on my '97 Rover Mini. (non VVC)

Now I start pairing down the Sensors that aren't used.

Is there any way, now or on a future update, to allow a user to set parameters and save them?

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 Post subject: Re: MEMS 2J
PostPosted: Sat Oct 25, 2014 10:16 am 
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David Wayne wrote:
Is there any way, now or on a future update, to allow a user to set parameters and save them?


Maybe profile definitions which can be loaded in? People could share definition files so that other customers with the same car could re-use them.

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 Post subject: Re: MEMS 2J
PostPosted: Sat Oct 25, 2014 10:17 am 
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Can people with MEMS2J tell me if the oxygen sensor voltages look sensible using the 03FD update? I suspect that the numbers are X4 higher than they should be but I don't have an actual car to check.

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 Post subject: Re: MEMS 2J
PostPosted: Sat Oct 25, 2014 11:10 am 
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pscan.eu wrote:
Can people with MEMS2J tell me if the oxygen sensor voltages look sensible using the 03FD update? I suspect that the numbers are X4 higher than they should be but I don't have an actual car to check.


Mine was reporting about 4V from memory. Don't know if that is what would be expected.

Actually, knowing what the various parameters are supposed to be would be very useful. Anyone know where to find the various actual values?


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 Post subject: Re: MEMS 2J
PostPosted: Sun Oct 26, 2014 4:16 pm 
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2.53V @ idle and 2.86V@3K RPM (screen shot the results yesterday)

I've read that the voltage should be 0.1 to 0.9v, and that it fluctuates. (BTW How often does the PScan sample?)

A table of serviceable readings, by vehicle, would be a great help.

If there is nothing wrong with the reader, perhaps it's the O2 Sensor.

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 Post subject: Re: MEMS 2J
PostPosted: Sun Oct 26, 2014 6:10 pm 
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yes it looks like I need to fix that and issue another update :facepalm:

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 Post subject: Re: MEMS 2J
PostPosted: Mon Oct 27, 2014 7:32 pm 
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Checked O2 again today, it does fluctuate and maxed out at 4.12V.

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 Post subject: Re: MEMS 2J
PostPosted: Sun Feb 15, 2015 3:57 pm 
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Failed on elise S1 111s

Tool don't get a signal (led not blinking).

I had not enough time to check if it require engine running or not. Any idea?


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 Post subject: Re: MEMS 2J
PostPosted: Sun Feb 15, 2015 6:36 pm 
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Bdb62 wrote:
Failed on elise S1 111s

Tool don't get a signal (led not blinking).

I had not enough time to check if it require engine running or not. Any idea?


If the LED is not flashing it means that the diagnostic tool is not receiving any power from the car.

1. Plug the tool into a different car (any car, it doesn't have to be a Rover or Lotus) and see if the LED on the tool starts to flash.

2. Try again on the Lotus.

If the light flashes on the other car but not on the Lotus then this means that there is no power on the diagnostic port of the Lotus.

On the J1962 connector you should find +12V on pin 16 and 0V on pin 4.

If there is no power on the J1962 connector then you need to look for a wiring fault or blown fuse.

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 Post subject: Re: MEMS 2J
PostPosted: Sun Feb 15, 2015 7:09 pm 
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On an S1 Elise I think that the diagnostic socket is powered by fuse 8 which is the same fuse as the brake lights. Do the brake lights work?

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 Post subject: Re: MEMS 2J
PostPosted: Sun Feb 15, 2015 9:27 pm 
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Yes, brakes lights are working and the tool was working on another my actual car (S1 120)

I'll have a better look on pins& wires asap


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 Post subject: Re: MEMS 2J
PostPosted: Sun Feb 15, 2015 10:08 pm 
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The flashing LED simply indicates that the diagnostic tool is powered up.
If the LED is not flashing it means that it is not receiving a 12 volt power supply.

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 Post subject: Re: MEMS 2J
PostPosted: Sat May 09, 2015 6:38 pm 
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I bought the Diagnostic tool and it works without any problem:

ECU identifier:TPUM0101ksj3p008

Historic error codes:-

Current error codes:-
MAP 2 low fault
Fuel temp high fault
VIS/VVT drive fault


As You explain on your side there are typical faults in the ECU,- I understand!
But what does it mean: VIS/VVT drive? This FC is only active if the engine is running!
Should I ignore it?
Thank You!


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 Post subject: Re: MEMS 2J
PostPosted: Mon May 11, 2015 10:40 am 
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Is it a VVC engine?

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 Post subject: Re: MEMS 2J
PostPosted: Mon May 11, 2015 5:33 pm 
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pscan.eu wrote:
Is it a VVC engine?

Yes, it is!


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 Post subject: Re: MEMS 2J
PostPosted: Mon May 11, 2015 6:50 pm 
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I get the same three errors with the engine running.

The Fuel Temp one can definitely be ignored as there's no fuel temp sensor to my knowledge.

Likewise I think the MAP2 error is spurious.

The VIS/VVT fault I don't know about. But I suspect it's a spurious reporting because I don't think there's anyone wrong with mine and the error only started appearing following one of the recent updates - I hope that's true anyway :)


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 Post subject: Re: MEMS 2J
PostPosted: Tue May 12, 2015 7:53 pm 
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Thank you for the confirmation.
I think it can't be a big problem because the warning lamp is not lightning and in the history no fault is stored.
But it would be better to know what it means.


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 Post subject: Re: MEMS 2J
PostPosted: Sat Jun 06, 2015 6:17 pm 
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On my Caterham with VVC Engine the following Errors are reportet (when engine running):
Current error codes:-
MAP 2 low fault
Ambient temp high fault
Fuel temp high fault
VIS/VVT drive fault

The Live Data with engine started from cold is:
Image


The first 3 Codes are missing Sensors in the caterham application. When VVC was stuck (not working) the last code has not been shown. After repair of VVC the code is shown, when Engine running... So in my oppinion this shows the absence of a drive fault...

The values in the live date are plausible... The idle Error value shows most of the time correct readings... some times it shows readings of about 65000. I think this is a problem with negative values which are missinterpreted by the software....

Has anybody similar readings and fault codes on a caterham...


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 Post subject: Re: MEMS 2J
PostPosted: Sun Jan 10, 2016 12:57 pm 
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Tested PECU unit (software 412) on 1999 MGF VVC with MEMS2J. Following errors received:

Historic error codes:-
Ambient temp low fault
Battery voltage low fault
MAP low fault
Ambient temp high fault
IAT high fault

Current error codes:-
MAP 2 low fault
Fuel temp high fault
Drive group A fault
VIS/VVT drive fault

The historic errors cleared but the current errors returned immediately. From previous posts in this thread, it seems that the first two errors can be ignored (MAP 2 and Fuel temp) as these sensors do not exist on the MGF VVC. Do not know what "Drive Group A" refers to. The car previously had a seized VVC drive but that should now be OK so would be interested to find out if VIS/VVT drive fault is a real fault or another spurious fault code.

General observations are that the live data feed is noisy or unstable with the readings fluctuating and displaying a question mark or blank randomly. Test yesterday on a MEMS 1.9 car gave rock steady live data readings.


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 Post subject: Re: MEMS 2J
PostPosted: Sun Jan 10, 2016 2:19 pm 
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Some of the early MEMS2J will spit out corrupt packets when the engine is running. It is as if the processor gets too busy to run the engine and the diagnostic protocol at the same time.

We have oscilloscope traces from a customer's car to prove that this is what is happening.

Currently pscan.eu software just ignores corrupt packets and displays -- to mean that it got data but it's corrupt and therefore not worth displaying, or ? means that it didn't get any data at all pertaining to that parameter.

My suspicion is that other tools are just showing what they got last time and so totally masking from the user that there is a problem.

As this is a fault with the ECU and not the diagnostic tool I don't think that there is much we can do about it.

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 Post subject: Re: MEMS 2J
PostPosted: Sun Jan 10, 2016 4:46 pm 
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pscan.eu wrote:
Some of the early MEMS2J will spit out corrupt packets when the engine is running. It is as if the processor gets too busy to run the engine and the diagnostic protocol at the same time.

We have oscilloscope traces from a customer's car to prove that this is what is happening.

Currently pscan.eu software just ignores corrupt packets and displays -- to mean that it got data but it's corrupt and therefore not worth displaying, or ? means that it didn't get any data at all pertaining to that parameter.

My suspicion is that other tools are just showing what they got last time and so totally masking from the user that there is a problem.

As this is a fault with the ECU and not the diagnostic tool I don't think that there is much we can do about it.


Thanks for the fast answer! The fluctuations I am seeing are entirely consistent with your explanation above so I am happy with that. I didn't notice how the live data values were behaving with the engine off and ignition on. I shall try that next weekend.


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 Post subject: Re: MEMS 2J
PostPosted: Mon Apr 17, 2017 1:03 pm 
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ADVVC wrote:
pscan.eu wrote:
Some of the early MEMS2J will spit out corrupt packets when the engine is running. It is as if the processor gets too busy to run the engine and the diagnostic protocol at the same time.

We have oscilloscope traces from a customer's car to prove that this is what is happening.

Currently pscan.eu software just ignores corrupt packets and displays -- to mean that it got data but it's corrupt and therefore not worth displaying, or ? means that it didn't get any data at all pertaining to that parameter.

My suspicion is that other tools are just showing what they got last time and so totally masking from the user that there is a problem.

As this is a fault with the ECU and not the diagnostic tool I don't think that there is much we can do about it.


Thanks for the fast answer! The fluctuations I am seeing are entirely consistent with your explanation above so I am happy with that. I didn't notice how the live data values were behaving with the engine off and ignition on. I shall try that next weekend.


I forgot to reply to the above which is sort of still valid; however we now have a hardware fix to the interface that fixes the corruption of live data with the engine running. If you have an interface box that hasn't had the fix applied then please PM us to arrange the fix.

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 Post subject: Re: MEMS 2J
PostPosted: Mon Apr 17, 2017 1:06 pm 
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We have done a lot of work on MEMS2J error codes for release 041A and it should now be spot on if you have a 200 BRM or MGF VVC.

However we don't have access to a Mini MPI or Rover 825/827 with MEMS2J.

If you have one of these cars please update to version 041A and log into the MEMS2J, then select Info.

Please reply to this topic saying what car you have and paste in the ECU identifiers from the Info shown in pscan.

This will hopefully enable us to do the same optimisation for these cars.

thanks

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 Post subject: Re: MEMS 2J
PostPosted: Fri Apr 21, 2017 6:29 pm 
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Mini MPI Knightsbridge from 2000

ECU identifier 1:TPUM0101adjmp003
ECU identifier 2:aaddjjmmpp000033


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 Post subject: Re: MEMS 2J
PostPosted: Fri Apr 21, 2017 9:00 pm 
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827 was a Honda wasn't it. Not a mems unit?

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 Post subject: Re: MEMS 2J
PostPosted: Sat Apr 22, 2017 12:11 am 
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Yes the 827 and some 825s were Honda engines with PGMFI ECUs.
Some 825s were the Rover KV6 and I think that these came with a MEMS2J.

Concerning the Mini MPI, using zone11's data it would seem that these cars do not have an oil temperature sensor, nor an ambient air temperature sensor.

As of version 041A error codes may be displayed for these sensors which should actually be ignored.
In fact the ambient air temperature sensor seems to be MGF specific as it didn't show up in my Rover 200 BRM ECU either.

In the next version I will include some extra text explaining this in the error code screen.

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 Post subject: Re: MEMS 2J
PostPosted: Sat Apr 22, 2017 9:49 pm 
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Update 041A
'97 MPI MEMS2J

ECU identifier 1:TPUM0101adjmp002
ECU identifier 2:aaddjjmmpp000022

Ambient Air: -214'C
Oil temp: increasing @20'C below coolant temp

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 Post subject: Re: MEMS 2J
PostPosted: Mon Apr 24, 2017 10:24 pm 
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David Wayne wrote:
Update 041A
'97 MPI MEMS2J

ECU identifier 1:TPUM0101adjmp002
ECU identifier 2:aaddjjmmpp000022

Ambient Air: -214'C
Oil temp: increasing @20'C below coolant temp


With these ECU identifiers the Rover T4 tool does not report oil temperature sensor faults, and will not read oil temperature in live data either.

Does this engine definitely have an oil temperature sensor?

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 Post subject: Re: MEMS 2J
PostPosted: Tue Apr 25, 2017 2:26 pm 
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Yes, it has an oil temp sensor, mounted on the block above the starter. BUT...looking through the Haynes and RAVE electrical diagrams there is no connection to the MEMS. It connects to the oil temp gauge on the fascia.

I wonder where the oil temp reading comes from on the tester. As I said it rises along side the coolant temp on the readout, delayed by about 20'C until it hits 90'C. Unless you know why this is happening, I will have to look into this a bit more.

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 Post subject: Re: MEMS 2J
PostPosted: Tue Apr 25, 2017 3:47 pm 
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On the MGF the oil temperature sensor connects to pin 10 of the black ECU connector.
Here is a picture of the ECU plug.
Image
Can you see what is connected to this pin on the Mini?

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 Post subject: Re: MEMS 2J
PostPosted: Tue Apr 25, 2017 4:22 pm 
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The oil temperature gauge found in the Mini MPI is not connected to the ECU but only to the extra gauge on various editions.

I also checked the official RoverRAVE circuit diagrams for the sensor, no connection to the ECU.

Finally, the Rover service manual describes the oil temperature gauge as simple gauge connected to 12v with the white cable and brown/blue cable connected to the ground with the temperature sensor in series.

Pin 10 on the black ECU connector is not used on my car.


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 Post subject: Re: MEMS 2J
PostPosted: Tue Apr 25, 2017 8:53 pm 
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Just checked the ECU connector - no wire in pin 10.

Now I am confused as to why the oil temp reading rises at the same rate as the coolant, even though there is no connection to the ECU. It must be Rover magic.

[EDIT] I am more confused as to why a temp sensor would have been installed, and wired in to the dash, without having the gauge. Oh well,I have one now, just have to drill the hole and install.

Oh well, one less parameter to monitor.

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