For 1990-2009 cars

### Data Link Connector (DLC)

The DLC provides a power source for the scan tool as follows:

• | Unswitched voltage (B+) at DLC terminal 16 (circuit 440)

• | Ground at terminal 4 (circuit 1550) and terminal 5 (circuit 1550)

### Class 2 Serial Data Link

The class 2 serial data link allows the following modules to communicate data with each other:

• | Electronic brake control module/electronic brake traction control module (EBCM/EBTCM)

• | Instrument cluster (IPC)

• | Powertrain control module (PCM)

• | Pass key III module (PK3)

• | Inflatable restraint sensing and diagnostic module (SDM).

• | Driver Information Display (DID)

• | Radio

The Class 2 serial data link allows a scan tool to communicate with the above modules for diagnostic and testing purposes. The Class 2 serial data link is located at the DLC connector terminal 2.