CAJ Innovations Forums - air pressure issue

aco31

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air pressure issue
12/19/11 at 09:04:46

Hi,

After more than 10KKms without issue, the bike is softer, less consumption, very great job, a dream for my old guzzi.

But since 1 week, i have a problem, the engine stops during few second and restarts just after. when I see the value of sensors, I see that the value of the air pressure captor is 0mB.
On the sensor, I have about 4.39v and I see the same value on pin 32 on ecu board. The value changes if I change the pressure on the sensor.
The last time i see these data before the bad behavior, I seen about 1020mB...
Have you an explanation? I ll check the different voltages on the board...
Thanks
alain (1100 IE 1997)
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Re: air pressure issue
Reply #1 - 12/20/11 at 09:04:55

You saw 0mB on the ECUController. Were the other values correct and updating at the same time.

Were you able to take voltage measurements at the same time.

The air pressure voltage should turn up on pin 39 of the chip ( near top left ). Does the voltage there agree.

Here's an experiment to prove the rest of the ECU is without problems.
After warming the bike up, turn SW2 in the ECU on. This should make the ECU ignore the barometric inputs. You can then see if the rest of the ride is problem free.

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aco31

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Re: air pressure issue
Reply #2 - 12/20/11 at 18:55:58

I checked the voltage on pin 32 of connector, in the same time, I changed the pressure on the sensor. The voltage follows the pressure.
Next step is to make the same operation on pin 39 of UC.
I have increased my map of 5% of fuel (original map + 15%). The behavior It's better . But (!) I must accelerate gently, otherwise the engine stops, and it restarts after may be one second. It's better but
I have already tried the swith 2 but I can't start the engine. I ll try with engine running.
Thanks.

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aco31

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Re: air pressure issue
Reply #3 - 01/09/12 at 18:09:22

Hi,
I checked the voltage on pin 39 of UC, it's the same, 3.975v on the sensor, on pin 32 of connector, and on pin 39 of uc.
I have turn 'ON' the switch 2, (engine running because I can't start the engine with switch 2 at ON). It' the same behavior, may be the problem occurs less of time.
Have I a way to check the time of conduction of the injectors?

I will see caracteristics of air sensor and replace it by 2 resistance in order to have the voltage corresponding at 1024mb.

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YaBB Administrator YaBB Administrator Offline I love YaBB! Posts: 679 The Land of YaBB	Re: air pressure issue Reply #4 - 01/10/12 at 12:43:25 The simplest way to see the injector time is to capture the serial data the ECU continuously outputs. Given your various symptoms this is probably the best thing to do anyway. Espeically if you can capture the engine stop.
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aco31

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Re: air pressure issue
Reply #5 - 03/07/12 at 01:28:08

hi, I have read data (38K no parity) sent by my ecu16m and i cant understand values obtained. I not find any sequence like '=0' or "=3" for the begin of structs.
could you send me a binary file (for each 3 structs sent) with the given values
thanks
alain
ex of received data
13 36 40 77 01 36 1b 1b 3e 1b 76 7d 02 fe 17 b6 db b6 9b 1b 36 f7 ff 73 b7 9f af 03 37 97 ff fb f9 13 b6 c0 0f 36 9b 36 9b 3f 13 ee 02 7e 07 b6 9b 36 9b 13 b6 f7 ff 03 36 df 2f 13 b7 37 77 fb fe 13 b6 c1 0f b6 1b b6 9b bf 03 e6 02 fe 17 b6 1b b6 db 03 b6 b7 ff 53 34 1f a7 03 b7 b7 77 9b fe 03 36 c1 1f b6 db b6 9b b7 03 e6 02 be 17 b6 1b b6 9b 03 b6 f7 ff 53 b7 1f af 03 37 b7 3f 9b f9 13 b6 c0 0f 36 9b 36 9b 3f 03 e6 00 be 3b f6 1b b6 1b b6 1b 76 f3 53 b5 1f af 1b b7 b7 3f 9b fd 13 b6 c0 8f b6 9b b6 1b 3f 13 e6 02 7e 07 36 9b 36 9b 13 b6 f7 ff 23 37 9f 2f 13 b7 37 bf 3b fd 03 36 70 a7 03 36 db f6 22 f6 ff 02 be 17 b6 9b b6 1b b6 1b ee ff 03 b6 9b 2f 03 b7 f7 bf bb fe 03 36 c1 1f b6 1b b6 1b bf 13 e6 02 fe 17 b6 9b b6 1b 1b 36 f7 ff 73 b7 9b af 03 b7 b7 37 bb fd 13 b6 c0 0f 36 9b b6 9b 3f 13 ee 02 be 3b b6 1b 36 9b b6 1b 76 f3 03 b5 db af 03 37 b7 b7 fb fd 13 b6 c0 0f 36 9b b6 1b 3f 1b e6 02 3e 3b b6 1b 36 9b b6 1b 76 f3 03 b7 1b af 83 37 97 37 bb f9 13 36 c0 0f b6 9b 36 9b bf 13 e6 02 7e 07 b6 9b b6 9b 03 36 f7 ff 03 34 9b 27 03 b7 17 f7 9b fd 03 36 c1 1f b6 9b 36 1b bf 03 e6 00 be 17 b6 1b b6 1b 03 b6 f7 ff 53 13 b7 81 33 b6 23 13 fd 13 36 d0 0f b6 9b 36 9b 3f 13 ee 02 7e 07 b6 db 36 9b 13 b6 77 ff 03 80 7e 1a f7 03 80 b6 fe 03 36 c1 1f b6 9b 36 9b bf 03 e6 02 7e 07 b6 9b b6 1b b6 1b 6e ff 03 0d 13 33 fe 1b 02 b6 f9 13 36 d0 1f 36 9b b6 9b 3f 13 ee 02 be 3b b6 db b6 1b....

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YaBB Administrator YaBB Administrator Offline I love YaBB! Posts: 679 The Land of YaBB	Re: air pressure issue Reply #6 - 03/07/12 at 06:11:22 38k was the old baud rate. It is now 57600. You should let the ECUController save the data for you.
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aco31 YaBB Newbies Offline I love MyECU! Posts: 20	Re: air pressure issue Reply #7 - 03/24/12 at 04:17:55 hi, I use ECU controller version 145. Could you explain to me how do the log? I don't found the solution... I will try with data logger set to 56K, this WE Thanks
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YaBB Administrator YaBB Administrator Offline I love YaBB! Posts: 679 The Land of YaBB	Re: air pressure issue Reply #8 - 03/24/12 at 06:57:08 First press the "ECU Diagnostics" then in that dialog you can select the files for raw and formatted logs and check the log boxes. This is from a later version but i think it is the same. One this page search for "diagnostics" http://www.cajinnovations.com/MyECU/OwnersManual/Owners%20manual.html
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aco31 YaBB Newbies Offline I love MyECU! Posts: 20	Re: air pressure issue Reply #9 - 03/25/12 at 06:10:44 Sorry but i don't have the same menu item... In my version, the item 'Diagnostics' allows only to open a file. it's not a good way for me... Could you send me the latest version of ECUControler or indicate me the procedure to download your version. In the same time I will try to load raw data with datlogger setted at 56K. thank
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Re: air pressure issue
Reply #10 - 03/26/12 at 07:46:35

I've just realised that your MyECU is from 2007 and therefore your firmware/software operates at 38K.

I think given the bumpy start you have had, it would be best if you send the ECU back to me to validate your kit and to upgrade it to the latest firmware. Just postage costs.

The other options are you can try the upgrade yourself. You first need to make up a cable -> http://www.cajinnovations.com/MyECU/FirmwareUpgrading.htm

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aco31

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Re: air pressure issue
Reply #11 - 03/27/12 at 07:09:20

It's difficult for me to send you my kit because without him, no bike!
in first i will try to find a magneti ecu. and verify if my bike start with him without mistake. Second, I will make the cable but i must find a PC with a centronic interface... It's not won...
But I don't understand why I can't find the 3 structures like described in the communication page (no software or hardware handshaking at 38K, 8 bits no parity) in raw data file read by the datalogger.
Could send me just an example of this 3 structures when you turn 'on' the bike, engine stopped.
should I Find in first the' Timing Info' struct prefixed by 1, followed by 'Compensation Info' prefixed by 3, finished by 'Analog inputs' prefixed by 0?
Thanks

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Re: air pressure issue
Reply #12 - 03/27/12 at 07:21:59

You should see something like what is displayed on this page http://www.cajinnovations.com/MyECU/SerialComms.htm

Are you using hyperterminal? Your capture above looks like you are displaying hex rather than ascii. What did you use to capture that with?

Does your ECUController talk to the ECU? Even on your older version you should be able to enter a filename like c:\ecudump.txt into that file open dialog and produce a capture I would think.

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aco31 YaBB Newbies Offline I love MyECU! Posts: 20	Re: air pressure issue Reply #13 - 03/28/12 at 05:17:22 I use 'rs232 datalogger' from eltima software to download data at 38k4. I read the file obtained with notapad++ with hex editor plugin. I will see the page that you tell me. when I press the "ECU Diagnostics", I have only a window to read a file, not to write a new file... (issu 1.45) The ecuControler talks perfectly with my ecu.
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aco31 YaBB Newbies Offline I love MyECU! Posts: 20	Re: air pressure issue Reply #14 - 03/28/12 at 05:28:06 In your example : 312F603CE410004000000000004000000042C0555 I can see only ascii chars, but in my file, the majority of chars are not asci, may be a comm issue... Is what the ecu sends only acsii strings?
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