WÄRTSILÄ 41508, Instruction Manual

Page: 92 / 161

CAN-bus failure KDU CAN-bus failure KDU
START START
Open Open
the cover the cover
Disconnect Disconnect
power from power from
the WECS the WECS
Check flat cable, Check flat cable,
I/O board. Change I/O board. Change
the broken one the broken one
Connect CAN Connect CAN
terminal resistor. terminal resistor.
If they exist, If they exist,
disconnect pins 23-2 disconnect pins 23-2
and 27-28 and 27-28
Change the Change the
KDU KDU
Find the broken Find the broken
cable/unit in the cable/unit in the
CAN network CAN network
Connect pins Connect pins
23-24 and 23-24 and
27-28 27-28
CAN CAN ne ne twork twork
probably OK probably OK
Is Is
resist resist ance ance
23-24 and 27-28 23-24 and 27-28
=120 ohm? =120 ohm?
Is Is
resistance resistance
23-24 = 23-24 =
60 ohm? 60 ohm?
I I s s resist resist ance ance
23-27 and 23-28 23-27 and 23-28
< 1ohm < 1ohm
CAN LED D CAN LED D 12 12
only blinking only blinking
when engine when engine
is running is running
No No
Y Y e e s s
No No
Y Y e e s s
No No
Y Y e e s s
Fig 08-12 Fig 08-12
3208120342 3208120342
O O p p e e r r a a t t i i n n g g T T r r o o u u b b l l e e s s 3 3 4 4 S S G G - - 2 2 0 0 0 0 4 4 1 1 4 4 - - 0 0 4 4