MOTO GUZZI B043157 Service Station Manual page 98

Electrical system
CAUTION! IF THERE IS A GROUND CONNECTION COMING FROM THE CONTROL UNIT, MAKE
SURE THAT DURING THE TEST THE CONTROL UNIT IS GROUND CONNECTED TO THE CIR-
CUIT.
VOLTAGE check
Check goal: this control is to check if a cable is energised, i.e. if it receives power supply from the
battery or the control unit.
Tester: set the tester on the direct current symbol and place the tester red probe on the cable being
inspected and the black probe on the vehicle ground connection (or on the battery - terminal).
CAUTION
IN CASE OF TEMPORAL MALFUNCTIONING, CARRY OUT ALL DUE CHECKS LOOKING FOR
FAULT BY MOVING SLIGHTLY THE CABLE HARNESS BEING INSPECTED.
GENERAL CONCEPTS OF ELECTRICAL TROUBLESHOOTING
THE CONNECTION DIAGRAMS ARE IN THE ELECTRICAL SYSTEM SECTIONS; PAY ATTENTION
TO THESE DIAGRAMS AS THEY SHOW THE CONNECTOR/COMPONENT AS VIEWED FROM
THE CABLE HARNESS SIDE, THAT IS LOOKING AT THE CABLES WHEN GOING OUT OF THE
"MAIN" CABLE HARNESS AND INTO THE CONNECTOR/COMPONENT.
CAUTION
BEFORE CARRYING OUT ANY TROUBLESHOOTING PROCEDURE ON THE VEHICLE, CHECK
THAT THE BATTERY VOLTAGE IS ABOVE 12V.
CONNECTOR CHECK PROCEDURE
The procedure includes the following checks:
1. Observation and check of the connector correct
position on the component or on the coupling con-
nector, making sure that the locking catch is re-
leased.
2. Observation of the terminals on the connector:
no rust marks or dirt should be present and it is
important to check terminal correct positioning on
the connector (i.e., all terminals aligned at the
same depth) and terminal integrity (i.e., that termi-
nals are not loose, open/bent, etc.). For connec-
tors whose terminals are not visible (e.g. Marelli
control unit) use a metal cable of suitable diameter
and introduce it carefully in the connector slot at
the same depth as for the other terminals of the
connector.
CAUTION
IN CASE OF TEMPORAL MALFUNCTIONING, CARRY OUT
ALL DUE CHECKS LOOKING FOR FAULT BY MOVING
SLIGHTLY THE CABLE HARNESS BEING INSPECTED.
ELE SYS - 98
Moto Guzzi California 1400