Yamaha FX10X 2008 Service Manual page 298

Fault code No. 43
Diagnostic code No. 09 (fuel system voltage)
Order Item/components and probable cause
1 Connections
Fuel injection system relay coupler
Wire harness ECU coupler
2 Open or short circuit in wire harness.
3 Malfunction or open circuit in fuel injec-
tion system relay.
FUEL INJECTION SYSTEM
Symptom Power supply to the fuel injectors and fuel pump is not normal.
Check or maintenance job
Check the couplers for any pins that may have
pulled out.
Check the locking condition of the couplers.
If there is a malfunction, repair it and connect the
coupler securely.
Repair or replace if there is an open or short cir-
cuit.
Between the fuel injection system relay coupler
and ECU coupler.
Blue/Red – Blue/Red
Between the fuel injection system relay coupler
and engine stop switch coupler.
Red/White – Red/White
Between the engine stop switch coupler and main
switch coupler.
Brown – Brown
Execute the diagnostic mode (code No. 09).
Replace if defective.
NOTE:
When the leads are disconnected, the voltage
check by the code No. 09 is impossible.
1. Disconnect the fuel injection system relay from
the wire harness and remove it.
2. Connect the pocket tester (Ω × 1) and battery
(12 V) to the fuel injection system relay termi-
nals as shown.
Positive battery terminal → Red/White 1
Negative battery terminal → Blue/Red 2
Positive tester probe → Red/Green 3
Negative tester probe → Red/Blue 4
3. Does the fuel injection system relay have con-
tinuity between the red/green and red/blue ter-
minals?
7-22
FI
Reinstatement
method
Starting the
engine and
operating it at
idle.