Table of Contents 673 Electronic & Computer Controlled Systems Audio Visual Communication-Local Area Network ........................... 122 AVC-LAN Protocol ........................................................................ 123 Gateway ECU ................................................................................... 124 CAN Gateway ECU ...................................................................... 124 CAN Gateway ECU Functions ...................................................... 124 Summary of Gateway ECU Functions .......................................... 125 Transmit/Receive Charts ..................................................................
126 BEAN Signal ..................................................................................... 127 BEAN Diagnosis ............................................................................... 128 Open Circuit .................................................................................. 129 Short Circuit .................................................................................. 130 Short Circuit Step 1 ........................................................................ 131 Short Circuit Step 2 ........................................................................ 132 Short Circuit Step 3 ........................................................................
133 Short Circuit Step 4 ........................................................................ 134 Short Circuit Step 5 ........................................................................ 135 Short Circuit Step 6 ........................................................................ 136 Diagnosing a Large Network ........................................................ 137 Diagnosing with Techstream ........................................................ 138 Diagnosing a BEAN Open Circuit with an Oscilloscope ............... 139 LIN Signal .........................................................................................
141 LIN Diagnosis .................................................................................... 142 CAN Signal ....................................................................................... 144 CAN Diagnosis ................................................................................. 145 Short Between CANH and CANL ................................................. 145 Short to B+ or Ground ................................................................... 145 Opens ........................................................................................... 146 CAN Bus Check ............................................................................
147 Location of DLC3 .......................................................................... 147 Finding a list of ECUs ................................................................... 148 Optional ECUs .............................................................................. 148 ECU List in System Description .................................................... 149 CAN Bus Components with SIL Connections ............................... 150 Terminating Resistors ................................................................... 151 Resistance Tests on CAN Circuits ................................................
153 Testing Multiple CAN Buses ......................................................... 155 AVC-LAN Signal ............................................................................... 158 AVC-LAN Terminating Resistor .................................................... 159 AVC-LAN Diagnosis .......................................................................... 160 AVC-LAN DTCs ............................................................................ 161 AVC-LAN Plus .................................................................................. 163 MOST: Media-oriented System Transport ........................................
164 Comparison of AVC-LAN, AVC-LAN Plus & MOST ......................... 165 MOST Communication ...................................................................... 166 MOST Diagnostics – Failure Diagnosis ............................................ 167 System Check ............................................................................... 168 MO+ Open .................................................................................... 169 iv Technical Training