Can Vehicle Communications Description - Chery Tiggo 2009 Service Manual

CAN VEHICLE COMMUNICATIONS
Description
Controller Area Network (CAN) communication is a multiplex communication system. The CAN system allows the
vehicles electronic modules to transmit and receive data. The following electronic modules are located on the CAN
network:
• Transaxle Control Module (TCM)
• Engine Control Module (ECM)
• CAN Converter
Operation
The CAN network uses a twisted pair of circuits to transmit data (+) and data (-). The data (+) and the data (-)
circuits are each regulated to approximately 2.5 volts during neutral or rested network traffic. As bus messages are
sent on the data (+) circuit, voltage is increased by approximately 1.0 volt. Inversely, the data (-) circuit is reduced by
approximately 1.0 volt when a bus message is sent. Multiple bus messages can be sent over the CAN circuits allow-
ing multiple modules to communicate with each other.
16
15–
Chery Automobile Co., Ltd.