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Diacom on a 165 ECM (1986 Camaro)

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Old 11-12-2000, 07:54 AM
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Car: 1997 Jeep Wrangler
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Diacom on a 165 ECM (1986 Camaro)

I just got my Diacom+ used, no books, just cable and disk.
I cannot link to the vehicle in ALDL mode, only diagnostic mode. The program mentioned a special adapter may be needed. Is there anyway around this? I have heard that the 1989 Camaro ECM doesn't have this limitation.

Here's my VIN 1G1FP87F7GL198075

There is just so much more info in ALDL mode I can't access and it's driving me crazy.

------------------
86 Camaro Sport
383 Speed-O-Motive Crate Engine, Trick Flow Heads, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Dynomax Cat-back, Serpentine belt setup, Dual IROC Fans.

http://www.sethirdgen.org/octride.htm
Old 11-12-2000, 10:58 AM
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This is actually a very good topic to discuss. I have noticed this too. Maybe Greg Westphal will jump in too

Anyhow, I have tried to link to several 165's with Diacom+ both with and without the special adapter. I can NEVER seem to get ALDL mode at 8192 baud. Why? I haven't a clue. In fact, I just tried this yesterday on a 1987 TPI vette and could not link to the computer. On 730s there is absolutely no problem. Links like a charm. But, on the 165s it just doesn't want to link ... and, if I do get a link, its only in Diagnostic mode. Can anyone here get their 165 ECM to link to Diacom in ALDL mode?? If so, what is your computer, what version of Diacom are you running, did you use the special Diacom adapter, etc?

Tim

------------------
TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's after installing Hooker LT Headers and reducing weight.
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Old 11-12-2000, 11:07 AM
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My Diacom will NOT link to anything buy 90-92 FBodies with the 730 ECM. I tried everything else but it will not link and if it does it will do it in Diagnostic modem and all the readings are erratic. I'm using a "Diacom compatible" cable with no special adapters.

------------------
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---------------
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Old 11-12-2000, 01:41 PM
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Tim, I have Diacom+ with the 7165 ECM in my 86 Vette and I'm able to link in both ALDL and Diagnostic modes using my laptop.

I tried linking my PC to the ECM when my laptop was on the blink and it wouldn't link.

After I got the laptop fixed, it linked just fine again. I do all my testing and trace saving using the ALDL mode since it provides more info than the Diagnostic mode.

I believe it has to do with the much higher speed of my PC compared to the laptop. Diacom's manual makes reference to computer speed issues.

I'm running Version 2.85. If you need the cable numbers shoot me a line.

Hope this helps.

Jake -Not to be confused with my namesake.

------------------
1986 Corvette Coupe, 415 CID, Edelbrock 6073s, ZZ9



[This message has been edited by JakeJr (edited November 12, 2000).]
Old 11-12-2000, 02:03 PM
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Would the fact that I have a custom prom keep me from linking in ALDL mode?

What if I gave Diacom a different VIN as long as the car had a 165 ECM?

------------------
86 Camaro Sport
383 Speed-O-Motive Crate Engine, Trick Flow Heads, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Dynomax Cat-back, Serpentine belt setup, Dual IROC Fans.

http://www.sethirdgen.org/octride.htm
Old 11-12-2000, 02:20 PM
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I am glad this topic came up. I have tried this as well with no success. I found a schematic for the diacom type cables and I was going to try an idea.

Since the 165 use the 8160 baud, I was going to cross the 8160 baud wire into the 8192 baud wire (which does not exist on the 165) so diacom "thinks" it is getting the faster signal.

I figured that was what the "special" cable was all about.

I recall seeing a turbo buick and he had something plugged right on to his ECM and then to the paralell port on his laptop. Very fast frame rate. He said it hooked to the dianostic port right on the circuit board, so there was access to real time data.

Sounded interesting.

Mark.
Old 11-12-2000, 02:34 PM
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Originally posted by Mark_ZZ3:
I recall seeing a turbo buick and he had something plugged right on to his ECM and then to the paralell port on his laptop. Very fast frame rate. He said it hooked to the dianostic port right on the circuit board, so there was access to real time data.

Sounded interesting.

Mark.
You are referring to a device called Direct Scan, it is marketed by: http://www.chuengineering.com/




------------------
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383 Speed-O-Motive Crate Engine, Trick Flow Heads, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Dynomax Cat-back, Serpentine belt setup, Dual IROC Fans.

http://www.sethirdgen.org/octride.htm
Old 11-12-2000, 03:30 PM
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JakeJr,

What speed is your laptop? Pentium? Not Pentium? Did you use the little adapter supplied with Diacom? What version of DOS? Is Windows installed on you laptop at all (in other words, do you boot to the DOS part of Windows?)

Tim

------------------
TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's after installing Hooker LT Headers and reducing weight.
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Old 11-12-2000, 07:12 PM
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Axle/Gears: 3.07
Originally posted by John Millican:
Would the fact that I have a custom prom keep me from linking in ALDL mode?

What if I gave Diacom a different VIN as long as the car had a 165 ECM?

Nope, the PROM doesn't matter; at least in my situation they haven't.

With my 7165 ECM, I've linked equally well with stock 1986 PROMS (2 different ones), 2 TPIS Stage V PROMS, and two other PROMs that were modified TPIS versions.

Jake



------------------
1986 Corvette Coupe, 415 CID, Edelbrock 6073s, ZZ9
Old 11-12-2000, 07:30 PM
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Originally posted by TRAXION:
JakeJr,

What speed is your laptop? Pentium? Not Pentium? Did you use the little adapter supplied with Diacom? What version of DOS? Is Windows installed on you laptop at all (in other words, do you boot to the DOS part of Windows?)

Tim

It's a non Pentium 486 and, yes I used the stock Diacom cable with no modifications. Diacom came with two cables that plug into the ALDL which then plugs into the laptop cable. No other adapter is used; not even the cigarette light DC plug.

I set up a BootMenu in C:\MSDOS.SYS file bey including two commands which stops the computer prior to it booting into Windows98. These two commands are the same as push the F6/F8 (or what other key your system may call for) key at the right moment in the boot process.

By entering the two commands, the boot process stops and gives me a screen allowing me to choose from 5 different boot options. Normal, Safe Mode, Step By Step, Command Prompt Only and Safe Mode Command Prompt Only.

I choose Command Prompt Only mode and run Diacom from a DOS prompt without ever loading Windows or its drivers.

You'll have to remove the attribute protections from the MSDOS.SYS file in order to edit it. The commands are "BootMenu=1" and "BootMenuDelay=10" you can change the "10" to however many seconds you want the delay to continue.

When the system boots and stops at the command screen, 'Normal' is the default and if no alternate command is entered in the time interval you select, the system continues to boot into Windows in the normal manner.

Don't forget to put the attributes back on once you've made the entries and saved them.

The attribute commands are: from the C:\ prompt "Attrib -s -h -r C:\msdos.sys" the press enter. To put them back on type "attrib +s +h +r C:\msdos.sys" then press enter.

Hope this helps.

Jake

------------------
1986 Corvette Coupe, 415 CID, Edelbrock 6073s, ZZ9

[This message has been edited by JakeJr (edited November 12, 2000).]
Old 11-12-2000, 09:34 PM
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Jake,
When your laptop was down, you said you could not connect with the desktop. Were you able to connect in either ALDL or Diag. mode or neither?

I am tring to connect with a 386 laptop in dos mode only, diag mode works well but ALDL never links. I can simulate the adapter by jumpering the A and B pins on the ALDL with a 10K resister and the ECM will report it's in ALDL mode but the Diacom program is still in diag mode. I try ALDL and it won't link.

Is Jake the only one that can link in ALDL mode?

------------------
86 Camaro Sport
383 Speed-O-Motive Crate Engine, Trick Flow Heads, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Dynomax Cat-back, Serpentine belt setup, Dual IROC Fans.

http://www.sethirdgen.org/octride.htm
Old 11-12-2000, 10:13 PM
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JakeJr,

That's exactly how I have my laptop setup. Plus, my laptop is a 486 laptop too. There goes that theory

Tim

------------------
TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's after installing Hooker LT Headers and reducing weight.
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Old 11-13-2000, 01:10 AM
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Originally posted by John Millican:
Jake,
When your laptop was down, you said you could not connect with the desktop. Were you able to connect in either ALDL or Diag. mode or neither?

I am tring to connect with a 386 laptop in dos mode only, diag mode works well but ALDL never links. I can simulate the adapter by jumpering the A and B pins on the ALDL with a 10K resister and the ECM will report it's in ALDL mode but the Diacom program is still in diag mode. I try ALDL and it won't link.

Is Jake the only one that can link in ALDL mode?

When I laptop was down I couldn't link to either the ALDL or Diagostic modes. The PC I was trying to link with was a Pentium II 400 Mhz. On previous occasions though, I have been able to link with the system using my other PC, the one my kids use for their school work, etc. It's an AMD 300 Mhz. Both had 64 Mbs of RAM.

So the old laptop and AMD PC would, but the Pentum II 400 wouldn't. ALDL is the default mode for my version of Diacom (2.85.) That mode gives me 44 lines of data logging.

Go figure.

The only thing I can recommend is for you to go into your system's BIOS setup program and place all the settings that you can at their slowest speed. Clock speed, ram speed, increase all the latency periods, wait states, etc. May work, although I've never tried it.

Jake

------------------
1986 Corvette Coupe, 415 CID, Edelbrock 6073s, ZZ9



[This message has been edited by JakeJr (edited November 16, 2000).]
Old 11-13-2000, 05:34 AM
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Originally posted by JakeJr:

The only thing I can recommend is for you to go into your system's BIOS setup program and place all the settings that you can at their slowest speed. Clock speed, ram speed, increase all the latercy periods, wait states, etc. May work, although I've never tried it.

Jake


Jake, my laptop is a 386, 20mhz!
How much slower can I get?
I'm about to give up on ALDL mode(mine defaults to ALDL too). Maybe I'll upgrade ECM's to the 730 speed density just to get the extra data


------------------
86 Camaro Sport
383 Speed-O-Motive Crate Engine, Trick Flow Heads, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Dynomax Cat-back, Serpentine belt setup, Dual IROC Fans.

http://www.sethirdgen.org/octride.htm
Old 11-13-2000, 08:54 AM
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Tim, I think Jeff and I were able to get it to read with the '89 chip I was running. Of course, that was the old '89 code that I had started with from a manual 305 bin, so the TCC wasn't working and other things weren't right. I'm using a MPSI Pro-Link from Linder Tech and it's working great, except that it only has a 4-line display.

I have heard from others that to get Diacom to work properly with the '165 ECM's that you need the 2.85 version and the TPI adapter (should come with the whole kit). I've also heard for a few years about the problem with computers running too fast for Diacom.

------------------
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Old 11-13-2000, 11:30 AM
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I've got 2.85; e-mail me.

The cable I use to link in ALDL mode reads "91006 Rinda Technologies GM Special-TPI" and the cable which plugs into the laptop reads "Rinda 91003"

If you've got the same software, cables and slower computer and still can't link it could be the way your port is configured. I'm using printer port LPT1.

Hope this helps.

Jake

------------------
1986 Corvette Coupe, 415 CID, Edelbrock 6073s, ZZ9

[This message has been edited by JakeJr (edited November 13, 2000).]
Old 11-13-2000, 04:26 PM
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Originally posted by JakeJr:

The cable I use to link in ALDL mode reads "91006 Rinda Technologies GM Special-TPI" and the cable which plugs into the laptop reads "Rinda 91003"

Jake

Jake, I don't have the 91006 GM Special-TPI adapter. I am also running 2.85 with the Diacom cable. I tried simulating the adapter ny using a 10K ohm resister between pins A and B. It doesn't work that way I take it. I wonder if Diacom sells replacement adapters?


------------------
86 Camaro Sport
383 Speed-O-Motive Crate Engine, Trick Flow Heads, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Dynomax Cat-back, Serpentine belt setup, Dual IROC Fans.

http://www.sethirdgen.org/octride.htm
Old 11-13-2000, 05:55 PM
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Originally posted by John Millican:
I just got my Diacom+ used, no books, just cable and disk.
I cannot link to the vehicle in ALDL mode, only diagnostic mode. The program mentioned a special adapter may be needed. Is there anyway around this? I have heard that the 1989 Camaro ECM doesn't have this limitation.

Here's my VIN 1G1FP87F7GL198075

There is just so much more info in ALDL mode I can't access and it's driving me crazy.

Diacom was written back when a 386 was state of the art.
I use mine with an ancient 486/25 monochrome.
The newer fast ones have problems linking and stayng linked.
You also want to use normal mode.
I con't remember the numbers but they moved the serial data pin on the ALDLs hence the two cables.

There is a list related to the syclones that show the non compatible ones.

Bad brain fade today maybe linked at wwww.syty.com

Old 11-13-2000, 06:38 PM
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I just got the part numbers off of my cables. The one that goes INTO the laptop is the same part number that you mention ... 91003. However, the part number of the cable that connects to the ALDL port is 91007 and reads ...

91007
RINDA
Technologies
GM 1982 & Up
READ SAFETY
INSTRUCTIONS BEFORE USE

For reference, I am running a Dell Latitude 486/50MHz laptop. I also have ANOTHER small connector supplied by Diacom. It is about 1-inch in length and plugs IN BETWEEN the Diacom cable that goes into the laptop and the Diacom cable that goes to the ALDL port. I thought that this was the special 91006 'adapter'.

Tim

------------------
TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's after installing Hooker LT Headers and reducing weight.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org
Old 11-14-2000, 08:59 AM
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Originally posted by TRAXION:
I just got the part numbers off of my cables. The one that goes INTO the laptop is the same part number that you mention ... 91003. However, the part number of the cable that connects to the ALDL port is 91007 and reads ...

91007
RINDA
Technologies
GM 1982 & Up
READ SAFETY
INSTRUCTIONS BEFORE USE

For reference, I am running a Dell Latitude 486/50MHz laptop. I also have ANOTHER small connector supplied by Diacom. It is about 1-inch in length and plugs IN BETWEEN the Diacom cable that goes into the laptop and the Diacom cable that goes to the ALDL port. I thought that this was the special 91006 'adapter'.

Tim

My 91006 looks just like the 91007
In my lil world the 91007 is the C3
and the 6 the P4
(Ithink?)

Old 11-14-2000, 11:30 AM
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I got to thinking about my laptop setup and went back and found all the old paperwork/manuals.

I gave you some incorrect info. The laptop that I use to link in ALDL mode is a Pentium 133, not a non Pentium as I posted earlier. Sorry.

I borrowed a friend's Pentium 433Mhz and it linked to the ALDL mode just as easily as my 133 and AMD PC had.

So apparently it isn't the computers' speed that's a factor because the laptop with the 433 which linked has a faster processor that my 400 Mhz PC which wouldn't link.

I'm beginning to think now that it's the port address that may have caused my 400 PC not to link.

The 86 165 ECM that's in my car only gives me two modes though, ALDL and Diagnostic. I do not get a "Normal" option shown on the screen. Later model years give that option I'm told.

You definitely need the 91006 adapter though. When you first load Diacom it gives you a screen explaining the need for the 006.

As I said before, ALDL gives 44 lines of data on my system.

Sorry for any confusion I may have caused.

Jake

[This message has been edited by JakeJr (edited November 14, 2000).]
Old 11-14-2000, 06:17 PM
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Originally posted by JakeJr:

You definitely need the 91006 adapter though. When you first load Diacom it gives you a screen explaining the need for the 006.

As I said before, ALDL gives 44 lines of data on my system.

Sorry for any confusion I may have caused.

Jake

[This message has been edited by JakeJr (edited November 14, 2000).]

Crap.
So the cable I have and software is worthless on a Camaro without that 91006 adapter?
Anyone ever take one apart and reverse engineer it? the adaptor that is.


------------------
86 Camaro Sport
383 Speed-O-Motive Crate Engine, Trick Flow Heads, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Dynomax Cat-back, Serpentine belt setup, Dual IROC Fans.

http://www.sethirdgen.org/octride.htm
Old 11-14-2000, 09:07 PM
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I found a schematic on the web for the base cable. I built one and it works. However, it still does not give me the ALDL mode. I was going to do some tweaking to see how I could make it work.

The cable uses a bunch of transitors as switches to turn on and off certain things, and to tell diacom what wire to read the data stream off. Hence my thought to plumb the slow baud wire into the fast one and see if diacom could figure it out. I would guess the adapter cable has some other "switch" in it.

Mark.
Old 11-15-2000, 11:03 AM
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Originally posted by Mark_ZZ3:
I found a schematic on the web for the base cable. I built one and it works. However, it still does not give me the ALDL mode. I was going to do some tweaking to see how I could make it work.

The cable uses a bunch of transitors as switches to turn on and off certain things, and to tell diacom what wire to read the data stream off. Hence my thought to plumb the slow baud wire into the fast one and see if diacom could figure it out. I would guess the adapter cable has some other "switch" in it.

Mark.
I agree, I made the same cable and it does not connect in ALDL mode. If you find out about the adapter let us know please....



------------------
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Old 11-15-2000, 12:04 PM
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Originally posted by John Millican:
I agree, I made the same cable and it does not connect in ALDL mode. If you find out about the adapter let us know please....

I have **seen** the net cable work just fine. Have used it on C3s P4s and the 808 stuff.
Some computers and the way they clock things (as I'm told) do have a problem with being too fast, and when they slow them down then work. The sy guys went thur this some time ago.
the difference in the adapters is just the location for the serial data line.

Old 11-15-2000, 02:38 PM
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I called Diacom Today.

The 91007 cable will not allow you to link in ALDL mode to any TPI 165 ECM. You must utilize the 91006 cable or the special adapter that fits between the 91007 and the cable that goes to the laptop. They stopped making this small adapter a long time ago and now only make the 91006 in its place. However, even my small adapter doesn't seem to solve the problem. My question becomes ... why did Rinda replace the small in-line adapter that I now have with the new 91006 full ALDL adapter. Seems to me that they probably encountered problems with the in-line adapter. No sure. They are suppose to be e-mailing me instructions just to make sure that my 91007 adapter is functioning properly.

Anyhow ... for you TPI guys ... the 91007 adapter will not work in ALDL mode (and probably not all the time in Diagnostic mode). You need the special 91006 adapter.

Tim

------------------
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Old 11-15-2000, 09:26 PM
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I wish for a special 91006 adapter. Can we get instructions somewhere?

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Old 11-15-2000, 09:31 PM
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The 165 is the ECM of this breed that REQUIRES a 10K-ohm resistor across the A-B pins of the ALDL. Otherwise the communication is identical hardware-wise for 165's (86-89) versus 730's (90-92). I'd be willing to bet a buck that if you put a resistor across the A-B and used your later-model cable that it would link up. I'm guessing that's the difference in the interface adapters. Probably not first shot, but after a couple of tries. What have you got to lose? Nothing.

...and if you really can't get it to work and they can't supply you with the hardware to make it work, screw Diacom and get an adapter from AKM and use 'free' software. That'll work.

Since I've never used Diacom, I can't comment on the software. It's got to be good though, everyone raves and drones and heralds it as the best thing since sliced cheese.

Old 11-16-2000, 05:33 AM
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Originally posted by Craig Moates:
The 165 is the ECM of this breed that REQUIRES a 10K-ohm resistor across the A-B pins of the ALDL. Otherwise the communication is identical hardware-wise for 165's (86-89) versus 730's (90-92). I'd be willing to bet a buck that if you put a resistor across the A-B and used your later-model cable that it would link up. I'm guessing that's the difference in the interface adapters. Probably not first shot, but after a couple of tries. What have you got to lose? Nothing.

...and if you really can't get it to work and they can't supply you with the hardware to make it work, screw Diacom and get an adapter from AKM and use 'free' software. That'll work.

Since I've never used Diacom, I can't comment on the software. It's got to be good though, everyone raves and drones and heralds it as the best thing since sliced cheese.


Read early inthis post and I did use a 10K resister accross A and B. I still could only link in Diag. mode BUT Daicom REPORTED it was in ALDL mode. It has a line item on the top of the screen that tells you what mode the ECM is in and with the resister it was in ALDL mode but I couldn't get ALDL data because I had Diacom set to diag mode.
Yes, I did try many times while the resister was in place to use ALDL mode in Diacom but still no link. The only big differance I see in vehicals is that the Diacom is wired to pin M of the A : connector for serial data and my 86 Camaro has the serial data going to pin E of the ALDL connector. Of course I swapped the Diacom cable from pin M to pin E with and without the 10K resister between A and B.
I cannot link. I'm ready to give up on Diacom except it works on so many vehicles because their database is LARGE.


------------------
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Old 11-16-2000, 08:11 AM
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Its more than just a 10K Ohm resistor ...

as Grumpy pointed out and as Rinda confirmed:

the difference in the adapters is just the location for the serial data line
Tim

------------------
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Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
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Old 11-16-2000, 12:18 PM
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Originally posted by TRAXION:
Its more than just a 10K Ohm resistor ...

as Grumpy pointed out and as Rinda confirmed:
Tim

I understand.
On a 1986 Camaro the serial data is on pin E of the ALDL connector.
Later they moved it to pin M of the ALDL connector. Can anyone verify what year they changed the pinout?
Besides that and the 10K resister what else is differant?
I repinned my ALDL from pin E to pin M with no differance.



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http://www.sethirdgen.org/octride.htm
Old 11-16-2000, 01:59 PM
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I talked to Rinda again today and brought my DVM (Digital Volt Meter), my Diacom Cable, and my special Diacom TPI adapter with me to work. Diacom sent me this e-mail ...

Hi Tim,

Here are the special TPI and 82 and UP adapter schematics in the form of a BMP image. In order to check the adapters connections, you will need to double-check the continuity between pins labeled with the same letter on both connectors. For example, looking at the front of both connectors, place one of the ohmmeters probe on the pin M of the square adapter and the other probe to the pin M on the round (5 pin DIN) connector. Depending on the scaling, your ohmmeter should read something between zero or couple ohms if the two pins are connected or an infinite resistance if there is no connection between the pins. Similarly you can check if two neighboring pins are shorted (on the 5 pin DIN connector) by placing the ohmmeters probe between two pins located next to each other. The ohmmeter should show an infinite resistance (or an open). You can also open the round connector and visually inspect the internal connections.

After talking to you this morning, I realized I gave you the wrong information about those pin designations (I looked at the wrong schematic, I apologize for that). Here are the correct designations:
82 an UP adapter:
A - Ground
B - Diagnostic Enable
D - Check Engine Light
E - TBI Data Stream (low speed)
M - PFI Data Stream (high speed)

Special TPI adapter configuration:
All pins are the same except pin E is the high speed data.

I hope this information will help.
Best regards,
Bogdan
The two bitmaps are available to anyone who wants them. Just let me know.

I used my DVM and everything looks great. The special little adapter that I have will place swap ALDL E into the same place that ALDL M is.

Tim

------------------
TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's after installing Hooker LT Headers and reducing weight.
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Old 11-16-2000, 07:04 PM
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Originally posted by TRAXION:

The two bitmaps are available to anyone who wants them. Just let me know.


Tim

Tim, please send them to me.

Thank you for the research, you have went above and beyond this time.

John



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http://www.sethirdgen.org/octride.htm
Old 11-16-2000, 07:34 PM
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Originally posted by Mark_ZZ3:
I am glad this topic came up. I have tried this as well with no success. I found a schematic for the diacom type cables and I was going to try an idea.

Since the 165 use the 8160 baud, I was going to cross the 8160 baud wire into the 8192 baud wire (which does not exist on the 165) so diacom "thinks" it is getting the faster signal.

I figured that was what the "special" cable was all about.

I recall seeing a turbo buick and he had something plugged right on to his ECM and then to the paralell port on his laptop. Very fast frame rate. He said it hooked to the dianostic port right on the circuit board, so there was access to real time data.

Sounded interesting.

Mark.
The Buicks have Directscan available to them (I use it all the time, if the engine is on it running) anyway it plugs into the edge card on the ecm lets you run at 19 frames a second. Running in dial mode is too cool, and there are several work in progrss for DIY stuff like this.
Ithink you want www.chuengineering.com
gets you there
Old 12-12-2000, 02:45 AM
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I just bought my Diacom off of ebay. The guy I bought it from said he purchased it new about 2 years ago. I was able to link up in ALDL mode with my 165 and TPIS level IV prom. The only problem I have with it is that after I unlink from ALDL, I get the "trouble code" flashing error. If I go immediately to the trouble code screen, I get a list of like 5 of them. But if I do the diagnostic mode, or use the simple paper clip, I get no codes. I am also not setting off the SES light at anytime, so I know it's an error. Anyone else get this? It doesnt bother me at all.
Here is my real question. I am running at 6 BTDC. I am getting about 4 degrees of knock retard at WOT. Should I keep retarding my timing until this value stays at zero at WOT? I should have bought this thing a LONG TIME AGO! I scanned a pic of the package and cables I received. Software is 2.85

Diacom pic

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Old 12-12-2000, 01:30 PM
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Originally posted by John Millican:
I just got my Diacom+ used, no books, just cable and disk.
I cannot link to the vehicle in ALDL mode, only diagnostic mode. The program mentioned a special adapter may be needed. Is there anyway around this? I have heard that the 1989 Camaro ECM doesn't have this limitation.

Here's my VIN 1G1FP87F7GL198075

There is just so much more info in ALDL mode I can't access and it's driving me crazy.

And don't forget the 165 can be either fast or slow. As I recall the 89 (6E) is the fast rate one. ECMs the same program code differences enable the different rate as I recall


Old 12-15-2000, 07:10 PM
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The error codes you're getting could be simply caused by the way you are shutting down the program.

You need to exit (or move to disk and save if you've been capturing data,) then choose #3 to exit the program, then you shut down the engine and finally disconnect the ALDL cable.

I use to get crazy error codes too and I tracked it down to the way I was exiting the program.

Also, initialize Diacom before making the ALDL cable connection. Seems that the Diacom program has to set some parameters before the actual connection to the car is made. Diacom claims damage to the cable can result if the program isn't run first.

As far as the knock retard, Diacom's book and other sources I've read say that some knock retard is normal with the type system we're using. You could probably back off on the initial enough to completely eliminate any trace of knock retard, but I suspect overall performance will suffer.

Hope this helps.

Jake

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[This message has been edited by JakeJr (edited December 15, 2000).]
Old 06-19-2001, 05:02 PM
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I have been having the same problems with diacom, as the rest of you. Could someone email me that schematic of the special adapter.
Thanks
Old 06-19-2001, 05:09 PM
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You dug this up deep from last year.

I could not scan my ECM with Diacom because I had a Street & Performance computer chip, they write it differantly to prevent copying so that prevented me from scanning it also.

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Old 06-20-2001, 12:05 AM
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I actually just got it working. I used a cable that I built from a website then I added a 10k ohm resistor and it links up perfect now.
Old 06-20-2001, 12:32 AM
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Hey Guys:
I had the same problem, I just put a jumper between E & M of the ALDL and it linked on a '86 w/ARAP chip.

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Old 03-27-2003, 11:02 AM
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So did anyone ever come up with a solution to this?

I am having the same exact problems as described here...I was reading along hoping to come across the solution, then nothing. I have the small intermediate connector 006 I believe....Do I just have to jumper e & M together?

Thanks guys!
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