DataMaster 3.5.1 Compatible with 86 Vette?
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 1,234
Likes: 5
From: Herriman UT
DataMaster 3.5.1 Compatible with 86 Vette?
I can't get Datamaster to communicate with the ECM on my late 86. I'm using an OBD Diagnostics USB cable with the 10k resistor. Any hints / advice?
Melting Slicks
Joined: Aug 2003
Posts: 3,380
Likes: 388
From: Lakeville MI
86 bins are only supposed to support 160 baud diagnostics. This could be your problem.
I've never actually tried datamaster with an 86 bin, so I don't know for sure if it will work at 160 baud or not. I see in your profile that you have an aftermarket chip. This adds another variable.
Can you at least scan at 160 baud with another program like TunerPro or TuneProRT and your present chip and cable? This would help to verify the set-up.
On a related note: Earlier this year, I successfully hacked an 88 4+3 bin to work for 86 4+3 cars, specifically for this purpose (to provide 8192 baud scan capability).
The unique 86 style first gear detection logic had to be added in and also some changes to work with the on/off switch wiring that is unique to 86.
There are some threads in the C4 Tech/Performance area that document some of this activity.
A few guys here are running variations of this bin with good results. Let me know if you're interested.
I've never actually tried datamaster with an 86 bin, so I don't know for sure if it will work at 160 baud or not. I see in your profile that you have an aftermarket chip. This adds another variable.
Can you at least scan at 160 baud with another program like TunerPro or TuneProRT and your present chip and cable? This would help to verify the set-up.
On a related note: Earlier this year, I successfully hacked an 88 4+3 bin to work for 86 4+3 cars, specifically for this purpose (to provide 8192 baud scan capability).
The unique 86 style first gear detection logic had to be added in and also some changes to work with the on/off switch wiring that is unique to 86.
There are some threads in the C4 Tech/Performance area that document some of this activity.
A few guys here are running variations of this bin with good results. Let me know if you're interested.
Burning Brakes
Joined: Jan 2002
Posts: 993
Likes: 4
From: Glen Burnie MD
I haven't tried running DataMaster yet with the bin from you guys, but I know I couldn't get DM to work before. It looks like the wire that carries the higher baudrate is physically missing from the ALDL, so I may not be able to either.
Try WinALDL and see what you get. It's nowhere near as good a program, but it's shareware...
[RICHR]
Try WinALDL and see what you get. It's nowhere near as good a program, but it's shareware...
[RICHR]
Melting Slicks
Joined: Aug 2003
Posts: 3,380
Likes: 388
From: Lakeville MI
Data is on Pin E.
Datamaster is expecting the data on pin M so the cable adaptor must tie the two pins together in the interface.
Pin M does not need to be populated in the car's ALDL connector.
Datamaster is expecting the data on pin M so the cable adaptor must tie the two pins together in the interface.
Pin M does not need to be populated in the car's ALDL connector.
Team Owner
Joined: Jan 2003
Posts: 20,275
Likes: 236
From: Summerland B.C. Canada
Melting Slicks
Joined: Aug 2003
Posts: 3,380
Likes: 388
From: Lakeville MI
Thanks for posting that schematic.
As long as the data gets to the correct pin on the serial port, that's all that matters.
Only a cable that is intended to work with both the newer and older cars (with support of both pin M and pin E) would require these pins to be tied in parallel.
This is not completely clear in the Datamaster Help file (nor in my previous post).
Still waiting for a report from geezel...
Dan, I know that you have datamaster working now at 8192 baud in your 86, since I've seen the data.
One question that is still unknown to me: Did it ever work at 160 baud with the original 86 bins?
I've never tried an 86 bin with datamaster to know if this will work or not, but this would be easy enough for me to try, I just never thought of trying it before (and my demo version was out of recordings). I'm still curious if this works.
Note: When I've run 86 bins with TunerProRT I only got 160 baud data.
Last edited by tequilaboy; Sep 11, 2007 at 10:19 AM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Team Owner
Joined: Jan 2003
Posts: 20,275
Likes: 236
From: Summerland B.C. Canada
I'll check into that later.
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 1,234
Likes: 5
From: Herriman UT
Success! I just installed an eprom that Pat (Tequilaboy) was gracious enough to provide and DM works fine. Now for some scanning...
Last edited by geezel; Sep 12, 2007 at 12:04 AM.