Yanmar 6LY3 series Service Manual page 296

TROUBLESHOOTING
Trouble Symptom
An engine data screen will not
display.
13-6
Causes
The battery voltage is low
(Discharging battery).
Battery will not charge.
Wiring of the control system is
disconnected.
Connectors are not closed.
Contact failure of each
connector pin.
Fuse burned out.
(IGN. PANEL: 10A)
Fuse burned out.
(ECU: 20A)
Fuse burned out.
(IGN. SIG: 10A)
Fuse burned out.
(IGN. 1st Station: 5A)
Fuse burned out.
(IGN. 2nd Station: 5A)
Detecting error.
(U0146 / 12)
© 2007 Yanmar Marine International
Troubleshooting by Symptom
Corrective Action
Check the electrolyte level and
the specific gravity of battery.
Charge the battery or replace.
Check for a short.
Check the wires between the
alternator and the battery.
Check the tension of the V-belt. See Check the V-Belt Tension
Check the alternator.
Connect the control system
wires.
Close the connector according
to the manual.
Check each connector terminal
and confirm continuity.
Replace the fuse.
Replace the fuse.
Replace the fuse.
Replace the fuse.
Replace the fuse.
6LY3 Service Manual
Remarks
See Checking the Electrolyte
Level on page 12-4.
See Charging the Battery on
page 12-5.
See Alternator Wiring Diagram
on page 11-8.
See Alternator Wiring Diagram
on page 11-8.
on page 4-25.
See Alternator on page 11-1.
See Alternator Wiring Diagram
on page 11-8.
See Remote Control Electronic
Control System (ECS) on
page 12-20.
See Remote Control Electronic
Control System (ECS) on
page 12-20.
See Troubleshooting Fuses,
Relays and Harnesses on
page 13-21.
See Troubleshooting Fuses,
Relays and Harnesses on
page 13-21.
See Troubleshooting Fuses,
Relays and Harnesses on
page 13-21.
See Troubleshooting Fuses,
Relays and Harnesses on
page 13-21.
See Troubleshooting Fuses,
Relays and Harnesses on
page 13-21.
DTC: See Troubleshooting by
DTC Fault Codes on
page 13-28.