Checking The Low-Pressure Fuel Pump And High-Pressure Fuel Pump; Checking The High-Pressure Fuel Pump Relay - SELVA MARINE Blue Whale 250 EFI Service Manual

– +
ELEC
4. Measure the input voltage between the
fuel injector coupler terminal and ground.
Check the wiring harness if below specifi-
cation.
STBD
Fuel injector input voltage:
Red/yellow (R/Y) – Ground
12 V (battery voltage)
5. Measure the resistance of the fuel injec-
tors.
Fuel injector resistance
(reference data):
12.0 Ω at 21 °C (70 °F)
Checking the low-pressure fuel
pump and high-pressure fuel pump
1. Check the low-pressure fuel pump and
high-pressure fuel pump operating sound
with "Stationary test" of the YDIS. Check
the fuel pump motors if there is no sound.
2. Disconnect the low-pressure fuel pump
coupler 1 and high-pressure fuel pump
coupler 2.
3. Measure the resistance of the fuel pump
motors.
8-31
Electrical system
S6P28445E
S6P28780
1
1
Low-pressure fuel pump resistance
1 (reference data):
1.3–4.0 Ω
High-pressure fuel pump resistance
2 (reference data):
0.5–10 Ω
Checking the high-pressure fuel
pump relay
1. Remove the high-pressure fuel pump
relay 1 and check it. To check the relay,
see "Checking the main relay and elec-
tronic throttle valve relay" in this chapter.
2. Connect the tester leads to terminals 2
and 3 as shown.
2
2
S6P28250
1
S6P28180
6P23H11