Yamaha 2010 XMAX YP125R Service Manual page 446

Fault code No.
Item
Fail-safe system
Diagnostic code No.
FI diagnostic tool display
Checking method
Probable cause of malfunction
1 Connections
• Wire harness ECU coupler
2 Faulty battery.
3 Malfunction in rectifier/regulator
4 Open or short circuit in wire harness.
Reinstatement method
Fault code No.
Item
Fail-safe system
Diagnostic code No.
FI diagnostic tool display
Checking method
Probable cause of malfunction
1 Malfunction in ECU.
Reinstatement method
46
Power supply to the fuel injection system is not normal.
Able to start engine
Able to drive vehicle
—
—
—
• Check the coupler for any pins that may be
pulled out.
• Check the locking condition of the coupler.
• If there is a malfunction, repair it and connect
the coupler securely.
• Charge or replace the battery.
Refer to "CHECKING AND CHARGING THE
BATTERY" on page 8-78.
• Replace if defective.
Refer to "CHARGING SYSTEM" on page 8-11.
• Repair or replace if there is an open or short
circuit.
• Between battery terminal and ECU fuse termi-
nal.
(red–red)
• Between ECU fuse terminal and ECU coupler.
(red/green–red/green)
Starting the engine and operating it at idle.
50
Faulty ECU memory. (When this malfunction is detected in the
ECU, the fault code number might not appear on the meter.)
Unable to start engine
Unable to drive vehicle
—
—
—
• Replace the ECU.
TIP
Do not perform this procedure with the main
switch turned to "ON".
Turning the main switch to "ON".
8-49
FUEL INJECTION SYSTEM
Check or maintenance job
Check or maintenance job