Circuit Description
WARNING: This page is about a different car, the 2005 Suzuki Swift +, 2005 Pontiac Wave, and 2005 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.
The provision for communicating with the engine control module (ECM) is the data link connector (DLC). It is located under the instrument panel. The DLC is used to connect the scan tool. Battery power and ground is supplied for the scan tool through the DLC. The Keyword 2000 serial data circuit to the DLC allows the ECM to communicate with the scan tool. A universal asynchronous receiver transmitter (UART) serial data line is used to communicate with the other modules such as the electronic brake control module (EBCM), the supplemental inflatable restraint (SIR) system, and the instrument panel cluster (IPC).