Table of Contents
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ELECTRONIC CONTROL MODULES - SERVICE INFORMATION
ELECTRONIC CONTROL MODULES - SERVICE
COMMUNICATION
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OPERATION
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DATA LINK CONNECTOR
DESCRIPTION
. . . . . . . . . . . . . . . . . . . . . . . . . 75
OPERATION
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DESCRIPTION
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . 76
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REMOVAL
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INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . 81
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LEARN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
REMOVAL
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REMOVAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . 86
INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . 88
INSTALLATION
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. . . . . . . . . . . . . . . . . . . . . . . . . 91
COMMUNICATION
DESCRIPTION
The Controller Area Network (CAN) data bus system is a multiplex system used for vehicle communications. Mul-
tiplexing is a system that enables the transmission of several messages over a single channel or circuit.
Many of the control modules in a vehicle require information from the same sensing device. Multiplexing reduces
wire harness complexity, sensor current loads and controller hardware because each sensing device is connected to
only one controller, which reads and distributes the sensor information to the other controllers over the data bus.
Also, because each controller on the data bus can access the controller sensor inputs to every other controller on
the data bus, more function and feature capabilities are possible.
A multiplex system allows the information flowing between controllers to be monitored using a diagnostic scan tool.
This system allows a control module to broadcast message data out onto the bus where all other control modules
can read the messages that are being sent. When a module reads a message on the data bus that it requires, it
relays that message to its microprocessor. Each module ignores the messages on the data bus that it does not
recognize.
INFORMATION
TABLE OF CONTENTS
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DESCRIPTION
REMOVAL
INSTALLATION
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ZH
page
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