MOTO GUZZI B043157 Service Station Manual page 140

Electrical system
Error cause
•
If shorted to positive: excessive voltage has been detected at PIN 53. If shorted to negative:
no voltage has been detected. If the circuit is open: an interruption has been detected
Troubleshooting
•
If shorted to positive: disconnect the injector connector, set key to ON, activate the compo-
nent with the DIAGNOSTICS INSTRUMENT and check the voltage on the Grey/Red cable
on the injector connector (if there is voltage): if there is voltage, restore the filter box cable
harness. If there is no voltage, replace the sensor
•
If shorted to negative: disconnect the injector connector, set the key to ON and check if there
is a ground connection on the Grey/Red cable: if there connection, restore the cable harness.
If there is no connection, replace the injector.
•
If the circuit is open: check the component correct electrical characteristic: if it is not the
correct one, replace the component; if it is correct, check the connector on the component
and the Marelli control unit connector: if not OK, restore. If OK, check cable continuity be-
tween PIN 53 and component PIN 2 and restore the cable harness
'Right cylinder injector P0205
•
short circuit to positive/ short circuit to negative / open circuit
Error cause
•
If shorted to positive: excessive voltage has been detected at PIN 67. If shorted to negative:
no voltage has been detected. If the circuit is open: an interruption has been detected
Troubleshooting
•
If shorted to positive: disconnect the injector connector, set key to ON, activate the compo-
nent with the diagnostics instrument and check the voltage on the White/Black cable on the
injector connector (if there is voltage): if there is voltage, restore the filter box cable harness.
If there is no voltage, replace the sensor
•
If shorted to negative: disconnect the injector connector, set the key to ON and check if there
is a ground connection on the White/Black cable: if there connection, restore the cable har-
ness. If there is no connection, replace the injector.
•
If the circuit is open: check the component correct electrical characteristic: if it is not the
correct one, replace the component; if it is correct, check the connector on the component
and the Marelli control unit connector: if not OK, restore. If OK, check cable continuity be-
tween the ENGINE PIN 67 and component PIN 2 and restore the cable harness
ELE SYS - 140
Moto Guzzi California 1400