AFRO Error

[Trump]

I have fitted an Check Engine Light to my MS3X. It shows two errors (flashing LED). 2 flashes which (I think) indicates a MAP error. I am trying to get good numbers for that. Maybe some one could suggest a starting point. What I can not understand is why it still shows an error, even though I turn off the MAP in the Check Light set up. I am utilizing the inbuilt MAP sensor.

The second error is a AFRO fault. This also shows in the bottom section of the TS screen. I have not been able to find any ref to this except to the fault code table in the MS3 Hardware manual. What does it refer to?

[jsmcortina]

Please post a datalog also.
AFR0 means the lowest AFR channel. i.e. reading from the oxygen sensor.

How did you arrive at the numbers for min/max ADC and min/max fluctuation for the MAP and AFR/EGO sensors?

James

[Trump]

Valid numbers are my big issue. Not sure how I get them.

Attached is a short log that shows a oil, AFRO and TPS errors.

[arran]

Maybe stating the obvious but thought it worthwhile to note how to read the flashes.

The first flash is a long flash for about 1 second. The subsequent quick flashes are the error code. The short flashes are maybe 0.5 secs, for example 6 short flashes is low batt voltage if I remember correctly, 8 short flashes is sync error...

It is just the short flashes that you count

[jsmcortina]

The flash codes and such are covered in the Megasquirt-3 Setting Up manual, but seems like you have that side of it covered.

Oil - at 613.016 the oil pressue is above the maximum you have set for that RPM, so it trips the CEL.

It looks like your EGO/AFR and TPS settings are way too sensitive. In particular the min/max fluctuation for EGO looks impossible to hold. Have you done what the manual suggests by enabling the status5 field and datalogging it?

James

[Trump]

I think I am getting on top of the TPS, MAT etc with the logs but am not going to well with the AFRO.
The input screen calls for the max, min to be shown in AFR, not the ADC counts. I set the max min to the max(20) min(9) my WB (Inovate LC1) will read with the max fluctuation set to the diff (11). This still gives me an error.
Have I got this correct? Not sure I have got the meaning of MAX MIN Fluctuation correct in this context. I would assume it referred to the max, min fluctuation in the reading (ADC Count or AFR reading??)) that the ECU will see (+ - a bit) during normal operation. Is that correct??

[Trump]

Was still being frustrated by the AFRO issue. Today I did some low end tuning near home utilizing the auto tune on TS. After about 20 Km the engine went off tune. When I checked the TS screen I saw that the AFR gauge was up at max. I had to load a tune from a restore point and turn off the EGO to get home.

It would appear that the Engine Check light was just doing its job and that is why I could not get the light to turn off.

Great feature for MS. I am now keen to introduce the limp home feature.

Thanks for your help on this.

[jsmcortina]

The fluctuations is described in the manual and does not work how you think it does. Please read the description.

James