Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSBUICK1996CENTURY SEDAN L4-2.2L VIN 4REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSDATA LINK CONNECTORDESCRIPTION AND OPERATION
1996 Buick Century Sedan L4-2.2L VIN 4
Data Link Connector: Description and Operation
1996 Buick Century Sedan L4-2.2L VIN 4SECTION Description and Operation
There are two data lines that can be accessed with a scan tool. The 800 circuit data line (CLASS 1) is the Powertrain Control Module (PCM) Data Line. It allows the PCM, Electronic Brake Control Module (EBCM) (if equipped), and the Diagnostic Energy Reserve Module (DERM) to communicate by transmitting data through CKT 800. The other data line (CLASS 2) is CKT 1807 which also allows the PCM to communicate.
A scan tool can be connected to the Data Link Connector (DLC); this allows the scan tool to communicate with the PCM Data Line. System operations can then be monitored for diagnostic purposes.
A scan tool can be connected to the Data Link Connector (DLC); this allows the scan tool to communicate with the PCM Data Line. System operations can then be monitored for diagnostic purposes.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.