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CAN BUS Terminal Resistance, Checking: General Description

The Engine Control Module -J623- communicates with other CAN Bus capable control modules.

The control modules are connected by two data bus wires which are twisted together (CAN_High and CAN_Low), and exchange information (messages). Missing information on the CAN Bus is recognized as a malfunction by the Engine Control Module -J623- and the other control modules connected to the CAN Bus.

Trouble free operation of the CAN Bus requires that it have a terminal resistance. This central terminal resistance is located in the Engine Control Module -J623-.

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