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In order to transmit, every nod must first check that the BUS (the connection among all devices) is free
before attempting to send a message with BUS (Carrier Sense).
If during this period there is no activity on BUS, every nod has the same chance to send a message
(Multiple Access). If two nodes start transmitting simultaneously, the nodes recognise the "colli-
sion" (Collision Detection) and initiate an exchange action based on message priority (messages remain
unaltered during exchange and there is no delay for high priority messages).
CAN protocol is based on messages and not on addresses. The message itself is divided into several
parts (frames), each of which has a meaning: message priority, data contained, error detection, recep-
tion confirmation, etc.
Every network nod receives all the messages sent through the BUS (with reception confirmation or error
messages) and each nod decides if the message is to be processed or rejected. Besides, every nod
can request information from the other nodes (RTR = Remote Transmit Request).
Level in wiring diagram:
CAN line
Electrical characteristics:
•
between PIN 66 and 80 of the control unit: approximately 130 Ohm
•
between PIN 26 and 27 of the instrument panel: approximately 120 Ohm
Pin out:
•
Line L: white/black cable between Marelli control unit PIN 66 and the black-bodied connector
PIN 27 of the instrument panel.
•
Line H: orange cable between Marelli control unit PIN 80 and the black-bodied connector
PIN 26 of the instrument panel.
CAUTION
BEFORE CARRYING OUT ANY TROUBLESHOOTING, CAREFULLY READ THE GENERAL TROU-
BLESHOOTING CONCEPTS FOR ELECTRICAL DEVICES AT THE BEGINNING OF THE CHECK
AND CONTROL SECTION IN THE ELECTRICAL SYSTEM CHAPTER.
DIAGNOSIS INSTRUMENT: ELECTRICAL ERRORS
CAN line "Mute Node" U1601
•
Mute Node.
Error cause
•
The injection ECU cannot send CAN signals; it receives signals from the instrument panel:
the control unit may need replacing.
Troubleshooting
•
Replace the Marelli control unit.
CAN line without signals U1602
•
Bus Off.
Error cause
Electrical system
TUONO V4 R
ELE SYS - 214
Summary of Contents for TUONO V4 R 2010
Page 1: ...SERVICE STATION MANUAL B043120 TUONO V4 R ...
Page 4: ......
Page 6: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Page 51: ...INDEX OF TOPICS SPECIAL TOOLS S TOOLS ...
Page 59: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Page 81: ...INDEX OF TOPICS TROUBLESHOOTING TROUBL ...
Page 90: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Page 107: ...TABLE C2 DEMAND SENSOR 1 Demand sensor TUONO V4 R Electrical system ELE SYS 107 ...
Page 217: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Page 237: ...INDEX OF TOPICS ENGINE ENG ...
Page 341: ... Turn the engine with the heads facing upward Tighten the screw 24 TUONO V4 R Engine ENG 341 ...
Page 351: ...INDEX OF TOPICS POWER SUPPLY P SUPP ...
Page 361: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Page 397: ...INDEX OF TOPICS CHASSIS CHAS ...
Page 419: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Page 431: ...INDEX OF TOPICS COOLING SYSTEM COOL SYS ...
Page 442: ...INDEX OF TOPICS BODYWORK BODYW ...