APRILIA TUONO V4 R 2010 Service Station Manual page 215

TUONO V4 R
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No communication on CAN line (PIN 66 and/or PIN 80): problem on the whole network (for
example, battery cut-off or short circuited or shorted to ground).
Troubleshooting
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check the Marelli control unit VEHICLE connector and the engine-vehicle cable harness
connector: if not OK, restore; if OK, check the ground insulation of the two CAN lines from
PIN 66 and PIN 80 of the VEHICLE connector: if not OK, restore cable harness; if OK, check
the continuity of the two CAN lines from Marelli control unit VEHICLE connector to the in-
strument panel connector: if not OK, restore the cable harness; if OK, check that the two
lines are not shorted to positive testing each of the 3 connectors (Marelli control unit, engine-
vehicle cable harness connector and instrument panel connector) with 1 connector discon-
nected at a time and by setting the key to ON: If not OK, restore; if OK, replace the Marelli
control unit.
CAN line towards instrument panel U1701
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no signal.
Error cause
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No signal is received from the instrument panel.
Troubleshooting
•
Check the connector of the instrument panel: if not OK, restore; if OK, check the continuity
of the two lines from the instrument panel connector to the VEHICLE connector of the Marelli
control unit: if not OK, restore the cable harness; if OK, replace the instrument panel.
CAN line towards instrument panel U1702.
•
Intermittent signal or communication error.
Error cause
•
Probable bad contact in the CAN line.
Troubleshooting
•
Check the Vehicle connector pins 66 and 80 and the vehicle-engine cable harness pins B2
and B3. If not OK, restore. If OK, check pins 26 and 27 and the instrument panel connector.
If not OK, restore. If OK, check overall operation of the Marelli control unit and instrument
panel: replace the affected component if you find any fault
CAN line toward CLF control unit U1712
•
Intermittent signal or communication error.
Error cause
•
Probable bad contact in the CAN line.
Troubleshooting
Electrical system
ELE SYS - 215