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Author Topic: M592 and M383 Discussion Thread  (Read 3389 times)
ricekikr
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« on: June 05, 2015, 10:42:01 AM »

Info for M592 and M383 are few and far between. Please post any info you have regarding M592 and M383.

The ff info is mostly 1.8t (AEB)

Most maps can be found using the M382 Clemens file (attached). Just search a string of hex and compare it your maps. Most will be the same or close.

FINDING DTC
(codeword / codewort)
 
This just removes the code, but doesn't remove the diagnostic. It'l still go limp and/or mess up your fueling/ignition/tune.

Most, if not all, DTC codes in the M592 and M382 are in one table. The table locations aren't in the same address in all versions of the ECU file.

Step 1.
Search for "00 FF AF 00 96 00 97 00 98 00 99 00"
(this is the start of the DTC table in the files I've been using. If not found search for "00 96 00 97 00 98 00 99 00")

Step 2.
Using the M382 file, compare the sequence of DTC in that file with yours. The tables will not match 100% since the M382 DTC table is smaller than the M592 and some of the M382 DTC are turned OFF while the M592 is ON and vice versa.

Sample:
M382
1B 00 00 FF 00 FF 00 FF E6 00 E7 00
M592
1B 00 00 FF 00 FF 00 FF E6 00 03 00 61 00 A5 00 00 FF E7 00

The values are the same except for the one in red. The M382 DTC maps are smaller, the red DTC is the additional DTC for the M592.

"1B 00 00 FF 00 FF 00 FF E6 00" is exactly the same for both M382 and M592. As is "E7 00".

Step 3
After completely labeling the DTC codes that have the same value. You'll be left with a couple of locations without a descriptor. Some of them are still for DTC. Like the LDP (not in the M382 file) but in the M592 file (right after the N75 DTC) or some of them are in the same position (relative) but turned ON in the M592 (Lambda 2, for example).

Step 4 (turning DTC off)
To turn OFF the DTC, change value to "00 FF",

To turn back ON just revert to original value
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ricekikr
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« Reply #1 on: June 05, 2015, 10:56:41 AM »

Thank you to all and the Nefmoto community who gave me tips on how to find the various maps and provided the files needed.

Edit:
*****************************
stock fuel/ignition/etc maps are only up to 6500-6800rpm

It'l use the fuel based on the last cell. In other words it'l not work properly without adjusting the fuel/ignition/etc maps first. It'l rev but fueling/ignition/etc will not be correct.

******************************

REV-LIMITER
The Rev-Limiter is the 30x1 map right after the 256x1 MAF Gamut on some files. On others you'll need to search for it.

If after Maf Gamut
Maf Gamut > Bunch or "00" > AA A3 A3 A4 AA AA C8 C8 C8 C8 C8 C8 AA A5 A6 A6 AA AA AA AA AA AA AA AA AA A3 A3 A4 AA AA (Some M382 and M592 have the same rev-limiter values)

In others.
Just search for "AA A3 A3 A4 AA AA C8 C8 C8 C8 C8 C8 AA A5 A6 A6 AA AA AA AA AA AA AA AA AA A3 A3 A4 AA AA"

If above doesn't work, try reducing the search string. It'l be easy to spot because before and after the Rev-limit map the values suddenly change (ie. 00 00 00 AA AA AA AA AA AA 02 02 02

**********
Values: The ecu has several Rev-Limiter constants. I'm not sure what they're all for. But changing them all to the same Rev-Limit I wanted worked.
« Last Edit: June 23, 2015, 11:18:51 AM by ricekikr » Logged
patnem
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« Reply #2 on: July 05, 2023, 08:20:04 AM »

hello i have 2 cars on m592. due to no local tuner support i have to learn on my own at this point. would you be kind enough to assist me with some questions i have.
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