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Home >> Saturn >> 2007 >> Vue Base, 2.2 D, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Computer/Integrating Systems) >> Diagnostic Information And Procedures >> DTC U2102 or U2103 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2005 Saturn L300. However, it is still accessible from the selected car via links, so may be relevant.

The controller area network (CAN) serial data line is a high speed serial data bus used to communicate information between the engine control module (ECM), body control module (BCM), and the transmission control module (TCM). Typical data-transmission speeds must be high enough to ensure that the required real-time response is maintained. The CAN serial data line does not communicate with the scan tool via the data link connector (DLC). CAN serial data information is interpreted by the BCM and transmitted to the serial data line by the BCM. The CAN bus is continuously monitored by the modules on the serial data bus.

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