APRILIA 8140172, Service And Repair Manual

Page: 244 / 279

ELECTRICAL SYSTEM
6 - 9
RSV mille
SERVICE DIAG V BATT
6.4.2 TROUBLESHOOTING
(IF THE ENGINE DOES NOT START)
Locating a fault in the electrical system
◆ Position the vehicle on the stand.
◆ Turn the ignition switch to position“
n
”.
The message “
(),
” comes up on the right-hand dis-
play for approx. three seconds.
◆ Press the start pushbutton “
r
”for more than four sec-
onds.
If the ignition system is malfunctioning, the message
“
(),
”reappears.
NOTE
If a fault is detected in the electronic system or if
the "
(),
" message flashes on the multifunction display,
do not start the vehicle so as to avoid secondary damage.
If the ignition system is malfunctioning and the message
“
(),
”, fails to reappear, make sure there are no breaks
in the white/purple (Bi/Vi) cable between the electronic
unit and the display.
◆
Remove the right side panel, see 7.1.3 (REMOVING
THE SIDE COVERS).
◆ Connect the two one-way TEST connectors (1).
◆
Turn the ignition switch to position “
n
”.
◆ Start the engine or attempt to start it.
The message “DIAG” comes up on the left display along
with a number corresponding to the reference code relat-
ing to the fault (see table); the fault detected may be
caused by breaks in the cables and/or connections not
made properly.
Checking an electric system fault:
a
CAUTION
Before commencing the automatic search for a fault,
stop the engine.
NOTE
When a fault comes up on the display, it is possi-
ble that the fault may also be attributable to the engine con-
trol unit.
The ECU may only be tested by connecting a new ECU.
Should the engine control unit work properly, remember
to refit the previous unit.
The ECU features an anti-breakdown device which,
where necessary, means the engine can be started and
run despite there being a fault on the display.
1
SERVICE DIAG V BATT