Checking The Main And Fuel Pump Relay (Main Control); Fuel Control System; Checking The Injectors; Checking The Electric Fuel Pump - Yamaha F80BETL Service Manual

Switch
Blue/green
position
(L/G)
Free a
Push b
Checking the main and fuel pump
relay (main control)
1. Remove the main and fuel pump relay
1.
1
2. Connect the digital circuit tester leads to
the relay terminals 2 and 3.
3. Connect the positive battery terminal to
the relay terminal 4.
4. Connect the negative battery terminal to
the relay terminal 5.
5. Check for continuity between the relay
terminals 2 and 3. Replace if there is
no continuity.
6. Check that there is no continuity between
the relay terminals 2 and 3 after dis-
connecting a battery terminal from the
relay terminal 4 or 5. Replace if there is
continuity.
6D93G11
Ignition and ignition control system / Fuel control system
Lead color
Black (B)
S6D88090
3
2
5
4
4
5
2
3

Fuel control system

Checking the injectors

1. Measure the resistance of the fuel injec-
tors.
Digital circuit tester: 90890-03174
Fuel injector resistance
(reference data):
12.0 Ω at 21 °C (70 °F)
NOTE:
Check the operation of the fuel injectors
using the "Stationary test" of the Yamaha
Diagnostic System.

Checking the electric fuel pump

1. Turn the engine start switch to ON.
1
2
3
S6D88100
8
4
5
S6C14170
6
7
8
9
8-10