Yanmar BY Series Service Manual page 237

ELECTRICAL AND ECU
Electrical Panel Components
( 2 )
( 1 )
( 3 )
( 13 )
( 14 )
( 15 )
( 16 )
Figure 12-3
1 – Fuse F1 (3 A) - Switched B+ to CAN
2 – Fuse F2 (10 A) - B+ to Key Switch
3 – Fuse F3 (10 A) - Fuel Supply Pump
4 – Fuse F4 (30 A) - Switched B+ to ECU
5 – Fuse F5 (20 A) - Power to Sensors and
Actuators
6 – Fuse F6 (10 A) - Auxiliary Power
7 – Jumper Fuse F7 (3 A) - Single / Starboard
Selection
8 – Jumper Fuse F8 (3 A) - CAN / Analog
Throttle Selection
9 – K1 - Starter Relay
10 – K3 - Fuel Supply Pump Relay
11 – K2 - Main Power Relay
12 – ECU
13 – Connector X1 - Communication to Helm
Display
14 – Connector X21/1 - Engine Wiring Harness
15 – Connector X22/1 - Fuel Injector Wiring
Harness
16 – Blocking Diode V1
IMPORTANT
The electrical panel cables must be
connected directly to the battery, and must
have an 80 A circuit breaker installed in the
B+ (red) lead.
12-10
Function Description - Engine Management System
( 4 )
( 6 )
( 8 )
( 5 )
( 10 )
( 7 )
( 9 )
( 11 )
( 12 )
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BY Service Manual