Rob Edwards

Was doing a little cleanup in the garage tonight, and came across the LH and EZK EPROMs from Dan's 91 S4 Auto. It occurs to me that I've not seen a master list of EPROM #'s vs. the years they've come from. So here's a start:


91 S4 Auto:

LH: 2 287 356 877

EZK: 2 227 355 334

93 GTS 5-speed:

LH: 2 287 357 477

EZK: 2 227 355 584

This is more for posterity than anything but clearly there are lots of chip variants out there. It would be interesting to get some data points. Anyone else?

Hilton

Here's a couple more.. late '87 S4

EZ-K - 2 227 355 480

LH 2.3 - 2 287 355 447

I can add the LH chip from my 89 shortly - just about to swap in my spare LH (already rebuilt) as I think the 89's original LH has died.

Hilton

Just noticed the number is in the LH binaries too..

Look at the end of the file - there's the Bosch part number, the 928 LH part number, and the sticker number off the chips.

e.g.

LH part no - 928 618 123 13 (89/90 S4)
Bosch part no - 0 280 002 507
Chip sticker - 2 287 356 487

I'll pull my 89's LH tomorrow, but the 89 LH bin file I have (from 928s4.com) has the above numbers in it. I just noticed this while making an '89 chip for my spare LH so I can do the swap easily tomorrow.

JWise

From my 90GT with a production completion date of 1/15/1990. I assume the chips to be original:

• LH - 2 287 356 486
  
• EZK - 2 227 355 584

Tom. M

Chris Ford has a nice summary of the LH and EZK 928 part numbers...and some actual bin files...

http://www.928s4.com/lh/lh_homepage.htm

John Speake

It appears that there were very frequent changes of chip # for each 928 618 123 XX code. So this implies at least some annual updates.

Hilton

Bump for this thread.

I found this list in a document by Theo:
(edit: since added with further info from a French website)


Comma delimited info on parts:

LH 2.3
Year,Model,ECU Part No,Bosch ECU part,Bosch ECU Chip,CHK,ECU type,Notes
1987,S4,928.618.123.10,0.280.002.504,2287355352,8814,L00LH-JET,(found in one of my '87 S4's #1022) ** this does support diagnostics - so seems like all LH2.3 chips do **
1987,S4,928.618.123.10,0.280.002.504,2287355447,2F67,L00LH-JET,(found in one of my '87 S4's #1898)
1987,S4,928.618.123.10,0.280.002.504,2287355832,62DE,L00LH-JET,
1988,S4,928.618.123.11,0.280.002.504,2287355447,2F67,L00LH-JET,(probably late '87, see above)
1988,CS/SE,928.618.123.12,0.280.002.506,,,,
1989,S4,928.618.123.13,0.280.002.507,2287356487,8A6C,L01LH-JET,
1989,GT/CS,928.618.123.14,0.280.002.506,2287356486,892F,L01LH-JET,
1991,S4,928.618.123.25,0.280.002.508,2287356877,,L01LH-JET,
1991,GT,928.618.123.26,0.280.002.509,2287356878,,L01LH-JET,
1992,GTS,928.618.123.30,0.280.002.514,2287357477,E4B0,L01LH-JET,


EZ-K
Year,Model,ECU Part No,Bosch ECU part,Bosch ECU Chip,CHK,Firmware Rev?,Notes
1987,S4,928.618.124.10,0227400035,,,,
1987,S4,928.618.124.11,0227400035,2227355480,CHK:B261,EZ121K,** This chip does not support diagnostics ** (found in MY87 up to at least RoW #1898 (one of mine))
1988,S4,928.618.124.11,0227400035,2227355520,1B1C,EZ121K2062,
1988,S4,928.618.124.12,0227400035,,,EZ121K2062,presuambly same chip as .11 variant
1988,S4,928.618.124.14,0227400035,,,EZ121K2062,presuambly same chip as .11 variant
1988,CS/SE,928.618.124.13,0227400043,,,,
1989,S4,928.618.124.15,0227400154,2227355544,35B8,EZ121K2093,
1990,GT,928.618.124.22,0227400164,2227355584,,EZ121K2182,(Jarrod's chips)
1991,S4,928.618.124.15,,2227355334,,,Rob Edwards' chip photo - need more info on ECU part no's
1992,GTS,928.618.124.30,0227400197,2227355341,,EZ121K2218
1995,GTS,928.618.124.30,,2227355584,,,Rob Edwards' chips in OP - but I strongly suspect this chip is from a 90GT

Old info in post below:

Hilton

More info added to the post above, with EZ-K and EZ-F chip part numbers.

Found online while looking up a chip I took out of a 928 618 124 15 EZ-K unit from a 90 S4.

The Bosch numbers beginning with a 2 are the chip part number.
The Bosch numbers beginning with a 0 are the ECU part number.
(CHK is the Checksum-16 value)
EZ-F
1985/86 S3 928.618.124.05 EZ58F CHK:FC43 BOSCH 27C32 0227400013
1985/86 S3 928.618.124.05 EZ58F CHK:31F6 BOSCH 27C32 0227400013
1985/86 S3 928.618.124.05 EZ58F CHK:F6B0 BOSCH 27C32 0227400013 2287355417
(probably some duplication here but I left it as there are 3 different checksum values)


LH 2.3
1987 S4 L00LH-JET 928.618.123.10 0.280.002.504 2287355352 (found in one of my '87 S4's #1022) ** this does support diagnostics - so seems like all LH2.3 chips do **
1987 S4 L00LH-JET 928.618.123.10 0.280.002.504 2287355447 (found in one of my '87 S4's #1898)
1987 S4 L00LH-JET 928.618.123.10 0.280.002.504 2287355832
1988 S4 L00LH-JET 928.618.123.11 0.280.002.504 2287355447 (probably late '87, see above)
1988 CS/SE ?? 928.618.123.12 0.280.002.506 ??
1989/90 S4 L01LH-JET 928.618.123.13 0.280.002.507 2287356487
1989/90 GT/CS L01LH-JET 928.618.123.14 0.280.002.506 2287356486
1991 S4 L01LH-JET 928.618.123.25 0.280.002.508 2287356877
1991 GT L01LH-JET 928.618.123.26 0.280.002.509 2287356878
1992/95 GTS L01LH-JET 928.618.123.30 0.280.002.514 2287357477

EZ-K
1987 S4 928.618.124.11 EZ121K CHK:B261 BOSCH 0227400035 2227355480 ** This chip does not support diagnostics ** (found in MY87 up to at least RoW #1898 (one of mine))
1988 S4 928.618.124.11 EZ121K CHK:1B1C BOSCH 0227400035 2227355520 (maybe very late 87?)
1989/90 S4 928.618.124.15 EZ121K CHK:35B8 BOSCH 0227400154 2227355544
1990 GT 928.618.124.22 2227355584 (Jarrod's chips above)
1991 S4 928.618.124.15 2227355334 (Rob Edwards' chips above)
1992/95 GTS 928.618.124.30 EZ121K CHK:35B8 BOSCH 0227400197 2227355341
1995 GTS 928.618.124.30 2227355584 (Rob Edwards' chips in OP - but I strongly suspect this chip is from a 90GT)

EZ-K
1987 S4 ?? 928.618.124.10 0.227.400.035 ??
1988 S4 E00EZK 928.618.124.11/12/14 0.227.400.035 EZ121K2062
1988 CS/SE ?? 928.618.124.13 0.227.400.043 ??
1989/91 S4 E01EZK 928.618.124.15 0.227.400.154 EZ121K2093
1989/91 GT/CS E02EZK 928.618.124.22 0.227.400.164 EZ121K2182
1992/95 GTS E01EZK 928.618.124.30 0.227.400.197 EZ121K2218

EZ-F
1985/86 S3 928.618.124.05 EZ58F CHK:FC43 BOSCH 27C32 0227400013
1985/86 S3 928.618.124.05 EZ58F CHK:31F6 BOSCH 27C32 0227400013
1985/86 S3 928.618.124.05 EZ58F CHK:F6B0 BOSCH 27C32 0227400013 2287355417
(probably some duplication here but I left it as there are 3 different checksum values)

PorKen

FWIW, part numbers are in the EPROM code similar to the format above.

They are visible in plain text if you view them with a hex editor.
Depending on the year, they are in different locations, but always near the end of the file.

EG. 88 S4 LH

Hilton

See post 3

The EZK ones don't seem to be.. although I haven't looked through a whole file (there is a UID, and its listed a couple of posts up, but unlike LH it doesn't mirror the chip part number). Handily I found some european sites which offer exchange brains that show the EZ-K chip numbers, and I have a few here too I've taken apart.

I've also modified a bunch of the binaries I've gathered for loading into the ST2 software (just have to change some bytes at the end of the file) - I just haven't got around to extracting the maps from them into an excel file or similar for comparison.

Oh - in case its not linked above.. here's a page with a bunch of binaries on it, thanks to Chris Ford for gathering them.

http://www.928s4.com/lh/lh_homepage.htm

PorKen

Whatever. I included a pic.

The '87 EZ I have doesn't have a part number, but the '89 does.
I haven't pulled my '88, yet.

Hilton

The EZ files only seem to have Porsche and Bosch part numbers for the complete ECU, not the chips (unlike the LH).

I need to go round to a friend's house and steal his ECU's, so I can add the 88 Clubsport/SE chip images to the collection.

(will pass them onto Chris when I get them to add to his site).

Rob Edwards

Bump. Anyone got brains opened right now with different number(s) ?

Mark Anderson

My notes for LH are as follows:
928 618 123 10 2 287 355 357 352
928 618 123 11 2 287 355 832 447
928 618 123 13 2 287 355 487
928 618 123 14 2 287 356 486
928 618 123 25 2 287 356 877

Crumpler

Can anybody confirm this:

I’m 90% certain the chips ending in 428 are from the EZF side and the 721 is from the LH side.

Could not find confirmation in other posts.
They are from a 86.5 manual.
Thank you.