Yanmar BY Series Service Manual page 236

Function Description - Engine Management System
1 – Oil Pressure Sensor
2 – Fuel Injectors
3 – Engine Coolant Temperature Sensor
4 – Fuel Rail Pressure Control Valve
5 – Low-Pressure Fuel Pump
6 – Water-in-Fuel Sensor
7 – Neutral Start Switch Connector
8 – Instrument Panel
9 – Electrical Panel (Fuses, Relays, ECU)
10 – Starter Motor
11 – Crankshaft Speed Sensor
12 – Glow Plug Harness Connector
13 – Circuit Breaker (Boatbuilder Installed
Option)
14 – Battery
15 – Battery Negative (-) Cable (Black)
16 – Battery Positive (+) Cable (Red)
17 – Battery Ground Connection
18 – Alternator
19 – Fuel Temperature Sensor
20 – Fuel Volume Regulator
21 – Charge Air Temperature Sensor
22 – Charge Air Pressure Sensor
23 – Fuel Rail Pressure Sensor
24 – Camshaft Speed Sensor
BY Service Manual
ELECTRICAL AND ECU
12-9