I need to reset my diagnostic link connector for my 1995 Oldsmobile Aurora. But whenever I plug my tools into it the tool says that its not connected to the computer so I'm thinking there is a short or something in the wiring but I dont have a clue. Any Ideas?

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May 21, 2008 - computer alerts motorists of problems with the vehicle's emission control ... tampered with and the connection to the on-board diagnostic (OBD) ... itspower from the same circuit as the cigarette lighter. ... scan tool, connected to the data link connector (DLC) under the dash, not ... General Program Questions.Missing: craftsman ‎whenever

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Automotive Diagnostic Scanners -- OBD-I and OBD-II

www.mikeogara.net/improve_your_car/auto_scanners/

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• REPAIR HELP
• 1998 OLDSMOBILE 88 3.8L SFI OHV 6CYL REPAIR GUIDE
• DRIVEABILITY & EMISSIONS CONTROLS
• TROUBLE CODES
• READING CODES

GM Bonneville/Eighty Eight/LeSabre 1986-1999
Reading Codes

• 1987-97 VEHICLES EXCEPT 1997 MODELS WITH 16-PIN DLC
• 197 VEHICLES WITH 16-PIN DLC AND ALL 1995-99 MODELS

Print

1987-97 VEHICLES EXCEPT 1997 MODELS WITH 16-PIN DLC

See Figures 1 and 2
Listings of the trouble for the various engine control system covered in this manual are located in this section. Remember that a code only points to the faulty circuit, NOT necessarily to a faulty component. Loose, damaged or corroded connections may contribute to a fault code on a circuit when the sensor or component is operating properly. Be sure that the components are faulty before replacing them, especially the expensive ones.

Fig. Fig. 1: ALDL/DLC terminal identification for 1987-97 vehicles, except 1997 models with a 16-pin DLC
The Assembly Line Diagnostic Link (ALDL) or Data Link Connector (DLC) may be located under the dashboard, and is sometimes covered with a plastic cover labeled DIAGNOSTIC CONNECTOR.

1. The diagnostic trouble codes can be read by grounding test terminal B . The terminal is most easily grounded by connecting it to terminal A (internal ECM ground). This is the terminal to the right of terminal B on the top row of the ALDL connector.
2. Once the terminals have been connected, the ignition switch must be moved to the ON position with the engine not running.
3. The Service Engine Soon or Check Engine light should be flashing. If it isn't, turn the ignition switch OFF and remove the jumper wire. Turn the ignition ON and confirm that the light is now on. If it is not, replace the bulb and try again. If the bulb still will not light, or if it does not flash with the test terminal grounded, the system should be diagnosed by an experienced driveability technician. If the light is OK, proceed as follows.
4. The code(s) stored in memory may be read through counting the flashes of the dashboard warning lamp. The dash warning lamp should begin to flash Code 12. The code will display as one flash, a pause and two flashes. Code 12 is not a fault code. It is used as a system acknowledgment or handshake code; its presence indicates that the ECM can communicate as requested. Code 12 is used to begin every diagnostic sequence. Some vehicles also use Code 12 after all diagnostic codes have been sent.
5. After Code 12 has been transmitted 3 times, the fault codes, if any, will each be transmitted 3 times. The codes are stored and transmitted in numeric order from lowest to highest.

The order of codes in the memory does not indicate the order of occurrence.

1. If there are no codes stored, but a driveability or emissions problem is evident, the system should be diagnosed by an experienced driveability technician.
2. If one or more codes are stored, record them. Refer to the applicable Diagnostic Code chart in this section.
3. Switch the ignition OFF when finished with code retrieval or scan tool readings.

After making repairs, clear the trouble codes and operate the vehicle to see if it will reset, indicating further problems.

Fig. Fig. 2: Engine diagnostic trouble codes - 1987-93 vehicles, and 1994 vehicles with a 12-pin DLC connector

197 VEHICLES WITH 16-PIN DLC AND ALL 1995-99 MODELS

See Figures 3 through 7

Fig. Fig. 3: DLC terminal identification for 1994 vehicles with a 16-pin DLC, as well as all 1995-99 models
On 1994-95 3.4L and 3.8L engines, and all 1996 models, an OBD-II compliant scan tool must be used to retrieve the trouble codes. Follow the scan tool manufacturer's instructions on how to connect the scan tool to the vehicle and how to retrieve the codes.

Fig. Fig. 4: Engine diagnostic trouble codes (1 of 4) - 1994 vehicles with a 16-pin DLC and all 1995-99 vehicles

Fig. Fig. 5: Engine diagnostic trouble codes (2 of 4) - 1994 vehicles with a 16-pin DLC and all 1995-99 vehicles

Fig. Fig. 6: Engine diagnostic trouble codes (3 of 4) - 1994 vehicles with a 16-pin DLC and all 1995-99 vehicles

Fig. Fig. 7: Engine diagnostic trouble codes (4 of 4) - 1994 vehicles with a 16-pin DLC and all 1995-99 vehicles

For 1999 Oldsmobile Aurora 4.0L SFI DOHC 8cyl the OBD Diagnostic Link Connector is located in front seating area, driver side, under dash, mounted under dash on driver side.

Hope this helps (remember to rate and comment this answer).

Hello, estus07 and thank you for asking your question on Fixya!

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your 1995 Oldsmobile Aurora, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people in your exact situation.
How to diagnose an overheating 1995 Oldsmobile Aurora
Pay attention to the block test part of the instructions.

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I did a 2001 and it wasn't too bad. You need a special tool to remove the pump from the water jacket. I just rented it from Autozone for free.
Don't let is go too long. I let mine go until the bearing froze up. Then it damaged the belt and pully running off the cam. Cost me another 200.00 in parts.

First of all, it's located below the steering wheel underneath the dash.
If it was late 1995 the OBD-II may be on the vehicle, but I think not. Usually '96 and above can be read by an OBD-II scanner.

OBD-I also had a connector in the same place, but uses a different scan tool.

good luck in reading codes.

PLEASE DON'T FORGET TO RATE!!!! Data Link Connector OBD II Systems use a standardized test connector called the Data Link Connector (DLC). It is located beneath the instrument panel somewhere between the left end of the instrument panel and 12 inches (300 mm) past the vehicle centerline.
The DLC is located out of the sight of vehicle passengers, but should be easily viewable by a technician from a kneeling position outside the vehicle. The DLC is rectangular in design, capable of accommodating up to 16 terminals and has keying features to allow for easy connection. The DCL and Scan Tool connector have latching features that ensure the Scan Tool connector will remain mated when properly connected. Some common uses of the Scan Tool are:

• To identify and clear any stored diagnostic trouble codes
  
• To read the serial data stream information (e.g., PID data)
  
• To perform Enhanced Diagnostic Tests (bi-directional Scan Tool)
  

Data Link Connector Graphic

go to link and follow links to free GM web site for a PDF of your owners manual.

http://www.edmunds.com/ownership/howto/articles/120189/article.html

The data link connector is a dedicated diagnostic scan tool connector. It is located in the engine compartment against the fire wall. It links the engine controller to the Diagnostic Readout Box (DRBII) scan tool or the Mopar Diagnostic System (MDS), or any other Chrysler-compatible diagnostic scan tool.

feel just under the drivers side dash you find it somewhere under there.

hope this helped
please rate well

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