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Automotive Computer Network Repair - Diagnostic Strategies of Modern Automotive Systems (Paperback)
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Automotive Computer Network Repair - Diagnostic Strategies of Modern Automotive Systems (Paperback)
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Automotive Computer Network Repair (Diagnostic Strategies of Modern
Automotive Systems) By Mandy Concepcion In this book we will cover
the intricacies of automotive inter-module communication systems or
networks. The scope of this section will also go beyond the normal
needs of an automotive technician. Hence, this will probably be the
most difficult part of this series to comprehend. Be patient and
open minded. Always give yourself time to absorb the knowledge and
do not be discouraged. Special emphasis will be placed on the CAN
system (Controller Area Network), since it is now the standard. CAN
is one of the 9 OBD-2 protocols. A protocol is an agreement on
communications interchange. It is in essence a computer
communication language and specifies signaling, wiring, size of
cables used, who controls the network and voltage levels. Various
protocols were used in the past, some proprietary and some generic
such as ISO 9141 and SAE 1850 VPW, but the standard is now the CAN
protocol. Virtually all vehicle networks now talk to each other
though the CAN protocol. It is now common place to see the seat
belt, SRS-Airbag, transmission, ABS-Brakes, engine and radio
modules or computer talking to each other through the network. Ever
wondered why your radio volume goes up when you accelerate the
vehicle? That's the engine computer or module telling the radio to
raise the volume due to a higher RPM and hence higher ambient
noise. It is also common to see a non-shifting transmission due to
a faulty network and the issue not being related to the
transmission at all. Hopefully this book will shed some light on
the operation and knowledge needed to tackle automotive networks in
today's vehicles...... Enjoy. Table of Contents 1. INTRODUCTION * -
Automotive inter-module communication systems or networks * -
Asian, Domestics and European Vehicles * - Fully Networked
vehicles. 2. THE NEED FOR IN-VEHICLE NETWORKING * - Use of
electrical and electronic components * - Networked automotive
sensors. * - Sharing of sensor information * - Weight savings and
the simpler wiring harnesses * - Networking and modular systems 3.
THE NEED FOR PROTOCOLS * - CAN or Controller Area Network
communication protocol * - CLASS A - Low speed * - CLASS B - Medium
speed * - CLASS C - High speed * - SAE (Society of Automotive
Engineers) * - ISO (International Standards Organization) * - What
is a Gateway? 4. NETWORKING ESSENTIALS * - the 7-layer ISO/OSI
reference model * - PHYSICAL LAYER * - DATA LINK LAYER * -
APPLICATION LAYER * - Medium Access * - CARRIER SENSE MULTIPLE
ACCESS or CSMA * - Network latency * - The Topology of a network *
- The STAR topology * - The BUS topology * - The TREE topology * -
The RING topology 5. DIFFERENT COMMUNICATION NETWORK * - The CCD
data bus (Chrysler Collision Detection) * - CCD bus ground * - CCD
bus bias voltage * - OEM scan tool (DRB III) * - NO TERMINATION
message fault * - The PCI bus (Programmable Communications
Interface) * - A CSMA/CD media access scheme * - The Header, DATA,
CRC, IFR and EOF elements * - DCL (Data Communications Link) * -
circuit 914 and 915 * - SCP (J1850) (Standard Corporate Protocol) *
- Dual wire twisted pair bus topology * - The ISO 9141 protocol * -
The NGS "DATA LINK DIAGNOSTICS" menu option * - GM (Data Line) UART
Serial Communications * - UART data line communications * - GM
CLASS 2 data bus * - State of health messages * - The Tech-2
scanner has a dynamic menu configuration * - The Tech-2's
PING-ALL-MODULES 6. CAN (Controller Area Network) * -
implementation of the CAN protocol * - 11 bit and 29 bit identifyer
* - EPA approved for MY 2003 and up * - CAN A, B and C * - MID and
PID CAN identifyers * - Master time-keeper-node * - Drive-by-wire
systems * - Byteflight, Flexray, and Time-triggered CAN or TTCAN *
- The CAN Data-Frame * - The CAN bus-access arbitration * - SOF
(start-of-frame) bit * - Control bit * - Arbitration bits * - Data
bits * - EOF or end of frame bit
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