Yanmar 6LY3 series Service Manual page 314

TROUBLESHOOTING
No. Size Application
9 5A IGN. SIG 1st
Station
10 5A IGN. SIG 2nd
Station
13-24
Trouble Symptom
Engine Stop Engine Running
Engine will not start. The engine shuts
ECU inoperative down and will not start
from 1st station.
Engine will not start. Engine shuts down
ECU inoperative and will not start from
1st station.
© 2007 Yanmar Marine International
Troubleshooting Fuses, Relays and Harnesses
Key
Switch
On Check the continuity between the negative
(-) side of the fuse and ground. (See Wire
Harness Locations on page 12-18.) In case
of no continuity, replace the fuse. If the fuse
burns out again, perform the following:
• Disconnect the 12-pin connector above
the fuel injection pump.
• Check continuity between Pin 1 and
Pin 9 and ground (Figure 13-2 on
page 13-25).
In case of continuity, the engine harness
may be shorted. Replace it. In case of no
continuity, remove the TELEFLEX
extension harness from the connector of
switch panel. Check the pins of the
TELEFLEX extension harness in the same
manner.
On Check the continuity between the negative
(-) side of the fuse and ground. (See Wire
Harness Locations on page 12-18.) In case
of no continuity, replace the fuse. If the fuse
burns out again, perform the following:
• Disconnect the 12-pin connector above
the fuel injection pump.
• Check continuity between Pin 1 and Pin
3 and ground (Figure 13-2 on
page 13-25).
In case of continuity, the engine harness
may be shorted. Replace it. In case of no
continuity, check the pins of the TELEFLEX
extension harness in the same manner.
6LY3 Service Manual
Corrective Action