Location of dlc 1994 buick century

Most vehicles after 1996 had the DLC port fitted as standard. On the chevy it is located in the drivers side footwell. It is tucked up under the dash at about knee height on the door side of the car.

The protocol is class 2 . Maybe your code reader is no good .
012 GM Class II Communications

Data Link Connector (DLC)
The data link connector (DLC) contains the following serial data links:
• Class II
• Entertainment and Comfort (E&C)
The DLC also provides a power source for the scan tool as follows:
• Unswitched voltage (B+) at DLC terminal 16 (circuit 1450)
• Ground at terminal 4 (circuit 1450) and terminal 5 (circuit 1550)

Class II Serial Data Link
The class II serial data link allows the following modules to communicate data with each other:
• Body control module (BCM)
• Electronic brake traction control module (EBTCM)
• Heater-A/C control (if equipped with RPO CJ2)
• Instrument panel cluster (IPC)
• Powertrain control module (PCM)
• Inflatable Restraint Sensing and Diagnostic Module (SDM).
The Class II serial data link allows a Scan Tool scan tool to communicate with the above modules for diagnostic and testing purposes. The Class II serial data link is located at the DLC connector terminal 2. Terminal 2 consists of the following circuits:
• Circuit 1036
• Circuit 1037
• Circuit 1128
• Circuit 1049
• Circuit 1122
• Circuit 1132
Entertainment and Comfort (E&C) Serial Data Link
The entertainment and comfort (E&C) serial data link allows a scan tool to communicate with the radio or the mobile telephone handset the remote CD player (if equipped). This communication is for diagnostic and testing purposes. The E&C serial data link is located at the DLC connector terminal 14, circuit 835.
PIN #9 goes to the air bag module .

under the dash near the base of the steering column

you should find the flasher unit under the dash on the drivers side,it may be a square or round unit with a connector plug on the top, when you remove the connector plug there are three terminals on the unit......hope this helps......cheers.

Front seating area, driver side, under dash, mounted near steering column

OBD DIAGNOSTIC LINK CONNECTOR2000 Buick Park Avenue 3.8L SFI OHV 6cyl the OBD Diagnostic Link Connector is located: Front seating area, driver side, under dash, mounted under dash on driver side

2000 Buick Century 3.1L SFI OHV 6cyl the OBD Diagnostic Link Connector is located: Front seating area, driver side, under dash, mounted driver side of steering column


Just as reference; if you will send the specific year and model we will can confirm or posted additional details.

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

On GM and Fords it's on the lower left hand corner of the dashboard, underneath the dash. You may have to look closer to find it.
There may be a plastic cap on it concealing it from view.

It should be there:

Diagnostic Link Connector Fig. 1: The OBD-II compliant Data Link Connector (DLC) is located under the driver's side of the instrument panel
Fig. 2: A Tech 1® , or equivalent scan tool must be used to retrieve codes from the 16-pin DLC connector
These vehicles are equipped with a Data Link Connector (DLC) which is the 16-pin connector that you attach the scan tool to read and/or clear Diagnostic Trouble Codes (DTCs). The DLC is located under the driver's side of the instrument panel.

check fuses

IT IS LOCATED DIRECTLY UNDER THE STEERING COLUMN.

With the advent of OBD-II, the Federal Government has mandated the location of the DLC (Data Link Connector) .The Data Link Connector is located in the passenger compartment. It is attached to the instrument panel and accessible from the driver's seat. The DLC is rectangular in design and capable of allowing access to 16 terminals. The connector has keying features that allow easy connection. The test equipment and the DLC have a latching feature to ensure a good mated connection. The Scan tool uses the DLC as a pathway to communicate with the on board computer system. If the DLC is not located under the dash, the vehicle is using OBD-I. This is a slightly different management system in its operation and diagnosis. Look for DLC under the hood near the left front headlight on the Town Car and Mark VII, near the right side firewall on the Continental.