Code / Scanning setup for the 1995 Riviera

Subject: Code / Scanning setup for the 1995 Riviera Sun Jan 28, 2007 7:54 pm

Hello guys, it seems to be some confusion about the 95 year/model Riviera and what scanning tool/cable to use to read OBD I codes. GM used a OBD II connector to interface a OBD I system. An OBD II cable/software will not work on the systems. (I tried)
Use this link for for more information. http://aldlcable.com/sc/details.asp?item=aldlobd2 You can purchace a cable or they give instructions to build one yourself using a standard PC serial cable. They also have several links to free scanning software and utilities.

Subject: 95 OBD homemade cable Tue Feb 13, 2007 3:20 pm

I would LOVE to be able to run some software on my laptop, and capture data while driving. This would help with things like my current problem of the car stalling while driving. My scanner will capture something like 3 seconds. Hard to time that with the random stalls. headbutt

Anyhow, I have a 95 Rivi, the good ole' OBD-I with the OBD-II connector. I cannot find any resource that says that THIS is how you would make a USB or RS-232 cable to connect to a PC and run with whatever software.
Can anyone point me to such a resource, or if you have one, tell me where you got it, got the plans etc?
Thanks.

Subject: Re: Code / Scanning setup for the 1995 Riviera Thu Feb 15, 2007 6:39 pm

I have one. Go here: http://www.aldlcable.com/sc/details.asp?item=aldlobd2

Also, download EFILive here:

http://store.efilive.com/download.aspx#downloads3

They don't have definitions for our car but I found that the Pontiac vin 1 and vin K works somewhat well. It will clear codes and give you much info. I dont think the boost meter works because when I tap the gas lightly, it says boost goes to 100%. Check it out, it works pretty good for me.

Subject: Re: Code / Scanning setup for the 1995 Riviera Thu Feb 15, 2007 9:13 pm

Boost is either 100% or 0%. It just tells you if you're in vacuum or boost. To calculate boost, you subtract baro pressure from MAP.

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That makes more since. The bad thing about that program is that is dosent feature a KR reading. I wonder if some calculation with some other key values would render a valid KR value. If not, I need to see if I can locate another definition file that will register KR. Damn OBD 1.

Nothing can "calculate" KR. It is created as a response to knock, which is picked up via mics on the engine block.

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Subject: Re: Code / Scanning setup for the 1995 Riviera Tue Mar 13, 2007 4:51 pm

I purchased the cable listed above. I installed EFlive on my laptop, and selected the 95 pontiac vin1 sig. I cannot get anything to work from there. IS there something I need to do yet? IO try to run it but I get errors in the window.

Subject: Re: Code / Scanning setup for the 1995 Riviera Wed Mar 21, 2007 2:10 am

Sorry for the late reply Crag, its boat season so I've turned my attention to tha Bayliner....anyway, So you are using the above def file, and you have the cable firmly plugged into the car and the serial port on the laptop? Make sure you select the "Engine data and DTCs" Macro, NOT the Clear trouble codes macro, and click the green stop sign looking icon at the top. It should have a pop up thats says start ALDI (F3). If you get an error of:Com timeout: Expecting frame header byte then you do not have communication with your ECM. We may need to take it a step further. Try this and if that dosent work, I'll give yo my Email and phone #. 'll try to walk you through it.

I am wondering if there might be a problem with the USB adapter I am using. I use it all the time to interface with telephony equipment over RS-232 connections. I saw no reason it would not work for this. Perhaps tonight, or tomorrow I will give it a try, and I will post any errors I am getting.

Subject: Re: Code / Scanning setup for the 1995 Riviera Wed Mar 21, 2007 2:56 pm

Here is what I am getting.
55:39.462: Opening COM6 8228,8,N,1
55:50.436: Start macro: Engine data and DTCs: DATADTC
55:48.563: Error: Reply frame checksum failure
55:48.573: Error: No echo received from MAX232
55:48.581: Send: $F4,$57,$01,$00,$B4
55:48.803: Com timeout: Data frame truncated:

Code:

$C8,$AE,$95,$30,$E8,$77,$FE,$C9,$2E,$10,$F4,$9C,$FD,$90,$5C,$2F,$08,$94,$91,$5B,$B0,$E9,$D0,$AD,$F1,$D1,$5B,$A0,$E1,$C8,$AE,$95,$30,$E8,$77,$FE,$C9,$2E,$10,$F4,$9C,$FD,$90,
$54,$2F,$08,$94,$91,$5B,$B0,$E9,$F8,$5B,$3D,$FC,$C8,$AE,$95,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
55:49.102: Com timeout: Data frame truncated: $C8,$AE,$95,$30,$E8,$77,$FE,$C9,$2E,$10,$F4,$9C,$FD,$90,$5C,$2F,$08,$94,$91,$5B,$B0,$E9,$C8,$AE,$95,$30,$E8,$77,$FE,$C9,$2E,$10,$F4,$9C,$FD,$90,$5C,$2F,$08,$94,$91,$5B,$B0,
$E9,$D4,$2E,$0C,$08,$54,$CB,$FF,$D5,$0D,$07,$C4,$FF,$C8,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
55:49.115: Send: $F4,$57,$01,$00,$B4
55:49.326: Com timeout: Data frame truncated: $9C,$A3,$57,$01,$00,$B4,$90,$5C,$2F,$08,$94,$C8,$AE,$95,$30,$E8,$77,$FE,$C9,$2E,$10,$F4,$9C,$FF,$90,$5C,$2F,$08,$94,$91,$5B,$B0,$E9,$C8,$AE,$95,$30,$E8,$77,$FE,$C9,$2E,$10,
$F4,$9C,$FD,$90,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00

55:49.348: Error: No echo received from MAX232
55:49.376: Error: Reply frame checksum failure
55:49.544: Error: Reply frame checksum failure
55:49.579: Error: No echo received from MAX232
55:49.635: Send: $F4,$57,$01,$00,$B4
55:49.647: Error: Reply frame checksum failure
55:49.671: Error: No echo received from MAX232
55:49.692: Error: Reply frame checksum failure
55:49.718: Stop macro: Engine data and DTCs: DATADTC

Subject: Battery Dead Wed Mar 21, 2007 9:49 pm

Sorry man, I havent driven the Riv in 3 weeks and the battery is dead. I was
going to get a screen shot to compair with you. I'll try again after a good overnight charge. Can you not bypass the USB adapter and run straight serial? I have the comm port setting set at default.

Subject: Re: Code / Scanning setup for the 1995 Riviera Tue Mar 27, 2007 9:47 am

Well, it turns out that the problem is my USB adapter. I connected directly to a PC that is in my garage, and I was able to collect fine. I will have to try another adapter. Aparently, IOGear will not work.

Subject: dead obd Tue Jan 08, 2008 5:01 am

i took my 95 rivi sc to auto zone to try and get my check engine light looked at,i knew from a previous visit to the gm dealer that it was a knock sensor code, and at the zone ,the scanner they had could not access the obd? theire scanner sed" no data available" so i then went to checkers,a big auto parts store in vegas, and rented a high falutin scanner, and it to read" unable to read" am i buggin or what? im begining to think that the aftermarket alarm i had instaled just tore up my car! these guys must have hacked into all kinds of wires and butchered my car! but i wonder how the gm guys got into the obd to get the knock sensor code? am i just not using the scanner right? it came with a manual ,but i just hoocked it up and that was it.....maybe there is another way to bypass the " unable to read" sign......any ideas guys?

Subject: Re: Code / Scanning setup for the 1995 Riviera Tue Jan 08, 2008 9:21 am

Make sure you're using an OBDI scanner. OBDII scanners only work on '96-up.

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Subject: Re: Code / Scanning setup for the 1995 Riviera Tue Jan 08, 2008 2:16 pm

AA wrote:

Make sure you're using an OBDI scanner. OBDII scanners only work on '96-up.

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'98 Buick Riviera; Gen V 3.25 pulley, N*, VS Cam, 180 stat, Custom PCM (Powrtuner), headers & HF cat , 42.5 lb inj.

Grant-built/PRJ/Thrasher trans 3.29 gears, 7/8 chain, zzp hardened IS