APRILIA MXV 450 - Page 64

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Check injector resistance; if NOT OK, replace the injector; if OK, check connectors, injector
side, control unit side and voltage regulator/battery side; if NOT OK, restore the connectors;
if OK, check that there is continuity of the ground cable between control unit connector and
injector connector; if NOT OK, restore cable harness; if OK, check that there is continuity of
the supply cable between voltage regulator/battery connector and injector connector. If OK,
check ground insulation of the positive cable or ground insulation (with battery connected
but engine off), or that the negative cable is shorted to positive. If NOT OK, restore cable
harness; if OK, replace the control unit.
Rear cylinder injector 1202- malfunction
Error cause:
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malfunction.
Troubleshooting:
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Check injector resistance; if NOT OK, replace the injector; if OK, check connectors, injector
side, control unit side and voltage regulator /battery side; if NOT OK, restore the connectors;
if OK, check that there is continuity of the ground cable between control unit connector and
injector connector; if NOT OK, restore cable harness; if OK, check that there is continuity of
the supply cable between voltage regulator/battery connector and injector connector. If OK,
check ground insulation of the positive cable or ground insulation (with battery connected
but engine off), or that the negative cable is shorted to positive. If NOT OK, restore cable
harness; if OK, replace the control unit.
Electrical system MXV 450
ELE SYS - 64