M4.3 to M 4.4: Really that simple?

Post by **erikv11** » 27 Sep 2020, 20:19

I don't remember what the default is in those files but that's right, you want everything set to zero in "Diagnostic disables" except for "diagnostics replacement value: intake air temperature" set that one to 20 or so.

Then values for whites and AC mod and you are good to go.

Post by **Chuck W** » 27 Sep 2020, 20:59

Geevs wrote: ↑27 Sep 2020, 15:08 Also the 3 "rear cat checK" scalars in "emissions" are also disabled by default, from what I see in both .xdf files.

Don't forget the other bank. IIRC, there are 3 in one bank, and 2 in the other.

Geevs · Post by **Geevs** » 28 Sep 2020, 13:05

Thanks again guys!

Geevs · Post by **Geevs** » 04 Oct 2020, 13:17

Hi again,

I'm preparing a simple bench flashing setup. There are 4 ground pins on the "A" socket (A13, A18, A28, A42). Do all 4 of these have to be connected to the (-) terminal of the power supply, or just one of them? The M4.4 Wiki says either of one of them will work - just wanted to confirm if this is correct because the 3 power pins (A12, A26, A27) all have to be connected to the (+) of the power supply according to the Wiki.

Thanks!

Post by **erikv11** » 04 Oct 2020, 13:23

For the grounds you have it right it is any one of them. Just pick one, they are all the same ground.

Geevs · Post by **Geevs** » 04 Oct 2020, 13:39

Thanks Erik for the quick response.

Can the B8 wire (bootlloader pin) be joined/spliced with the 3 other power pins? The Wiki is not clear to me as it says 14V to the 3 power pin and 13.5V to B8 - not sure if the means separate connections to the (+) of the power supply, or can be the same connection. Does the difference in voltage matter?

Post by **Chuck W** » 04 Oct 2020, 15:52

I use a single 14V power-supply for my bench flashing. I connect the B8 to the save power source as the power pins.

You want 13.5V + on the bootloader pin to enable flashing.

Geevs · Post by **Geevs** » 04 Oct 2020, 18:27

Thanks Chuck.

I found the standalone programs for the AC mod and the MAF resizing. Is there a standalone program that updates injector-related values based on type i.e. orange, white/blue, green, 750cc, etc. rather than entering them manually?

Post by **Chuck W** » 04 Oct 2020, 20:30

Not that I know of. Just went through it all recently on my T5.

I actually don't use the program to do the software mod. I just manually change the bytes in the appropriate places while I'm messing in TunerPro.

-Change both bytes at address $6AC8 and $6AC9 in the manual bin or address $6B42 and $6B43 in the automatic bin into #00

Geevs · Post by **Geevs** » 06 Jun 2022, 17:04

Just wanted to give an update on this... finally flashed an M4.4 ECU and ran it. Initially got DTC for the baro sensor, so I disabled it and re-flashed. I have one remaining DTC and it is P1308 - A/C Clutch circuit fault. My A/C system is currently empty (no refrigerant) but the compressor is still on the car and plugged-in keeping the electrical circuit intact. I never turn on the AC (even with the M4.4 AC mod applied).

Is lack of refrigerant causing the DTC? I read the accelerometer can also cause this DTC. If so, how does one address this?

Thanks again!

M4.3 to M 4.4: Really that simple?

Re: M4.3 to M 4.4: Really that simple?