96LT4c4

Hi guys I haven’t posted here in a while. I am usually over at fullsizechevy as 94blazer383. But anyway, my dad and I have a little project on our hands. A 1973 VW Super Beetle with GM fuel injection. It came out of a 91 S-10 with a TBI 2.5 L 4 banger. ECM part number is 1227165 ASWY mask $83A, I think the ALDL data stream is A099.

I am using Tunerpro RT with an Autoprom. I have a .bin, .xdf, but my problem is with the .ads file. I am trying to make my own. Going off the A099 ALDL file and using my $0D A217 .xdf for my Blazer, I have the beginnings of an .xdf for the Beetle. I set up the command string, payload size, Checksum Cmd is checked, Master is checked, and Monitor is checked. I am not sure about the payload offset. My A217 file for my Blazer has a 4 there. How do you determine the payload offset?

I am able to connect to the ECM but I am not able to read any data, I just get all zeros. I have a few things added like TPS, RPM, and Engine Coolant….etc. I know this ECM came out in TPI Camaros, Firebirds, and Vettes. Just wondering if you guys might be able to give me some ideas on what I need to do to read the data from this thing. I don’t think I need the 10K resistor because the A099 says it’s an 8192 baud, and I thought that was only for the 160 baud ECMs. But I found an .ads file by Mark Mansur called “1227165-160baud”. Any help would be appreciated.

Here is some of the ALDL A099

DATA STREAM A99 SPECIFICATION
ENGINE USAGE:
2.5 L TRUCK TBI LN8 1990 S,T,M TRUCKS (VIN=E)
2.5 L TRUCK TBI LN8 1991 S,T TRUCKS (VIN=E)
DATA PIN : READ DATA ON PIN "M" OF ALDL CONNECTOR
BAUD RATE : 8192 BAUD BI-DIRECTIONAL
..PAGE
MODE 0 (RETURN TO NORMAL MODE)
ALDL REQUEST:
- MESSAGE ID = $F0
- MESSAGE LENGTH = $56
- MODE = $00
- SUM CHECK
ECM RESPONDS WITH NORMAL MODE MESSAGE *F97*

MODE 1 (TRANSMIT FIXED DATA STREAM)
ALDL REQUEST:
- MESSAGE ID = $F0
- MESSAGE LENGTH = $56
- MODE = $01
- SUM CHECK
THE ECM WILL RESPOND WITH THE FOLLOWING MESSAGE:
- MESSAGE ID = $F0
- MESSAGE LENGTH = $95
- MODE = $01
- DATA BYTE 1
.
.
- DATA BYTE 63
- SUM CHECK
--------------------------------------------------------------------------

6 COOLDEGA COOLANT TEMPERATURE, A/D COUNTS
DEGREES C = N*.75 - 40
7 COOLTSU START UP COOLANT TEMPERATURE
DEGREES C = N*.75 - 40
8 ADTHROT THROTTLE POSITION, A/D COUNTS
VOLTS = N*(5/255)
9 NTPSLD RESCALED TPS, 0 = 0%, 255 = 100%
% THROTTLE = N/2.56
10 NTRPMX ENGINE SPEED VARIABLE (RPM)
RPM = N*25
11 OLDRFPER TIME BETWEEN REFERENCE PULSES (MSB)
12 OLDRFPER+1 TIME BETWEEN REFERENCE PULSES (LSB)
uSEC = ([N11]*256+[N12])*15.26
..PAGE
13 FILTMPH FILTERED MILES PER HOUR VARIABLE (MSB)
MPH = N
14 FILTMPH+1 NOT USED
15 AD02A OXYGEN SENSOR VARIABLE
VOLTS = N/226
16 ALDLCNTR OXYGEN SESNOR RICH/LEAN TRANSITION COUNTER

Pics of the car

http://s105.photobucket.com/albums/m...uper%20Beetle/


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Oh, the command I am using is.

MODE 1 (TRANSMIT FIXED DATA STREAM)
ALDL REQUEST:
- MESSAGE ID = $F0
- MESSAGE LENGTH = $56
- MODE = $01

RBob

iTrader: (1)

I would try the 10K resistor just to see if it makes a difference. As for the payload and such search the DIY_PROM board and check the Tuning Guide sticky on that board. The sticky should have some links to threads that discuss setting up for scanning.

RBob.