Yamaha MBK MW125 2014 Service Manual page 344

Fault code No. 44
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Tool display
Procedure
Probable cause of malfunc-
Item
tion and check
1 Locate the malfunction.
2 "01" is indicated in diagnostic
mode (code No. 60). EEP-ROM
data error for adjustment of CO
concentration of cylinder.
3 Malfunction in ECU.
Fault code No. 46
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Tool display
Procedure
Probable cause of malfunc-
Item
tion and check
1 Malfunction in charging system. Check the charging system.
44
EEPROM fault code number: an error is detected while reading or
writing on EEPROM.
Able/Unable to start engine
Able/Unable to drive vehicle
60
EEPROM fault code display
• 00 (no history)
• 01: Cylinder fault code number (history exists)
—
Maintenance job
Execute the diagnostic mode.
(Code No. 60)
00: Go to item 3.
01: Go to item 2.
Change the CO concentration
of cylinder, and rewrite in EE-
PROM.
Refer to "ADJUSTING THE EX-
HAUST GAS VOLUME" on
page 3-8.
After this adjustment is made,
turn the main switch to "OFF".
Replace the ECU.
Refer to "REPLACING THE
ECU (engine control unit)" on
page 8-59.
46
Charging voltage is abnormal.
Able to start engine
Able to drive vehicle
—
—
—
Maintenance job
Refer to "CHARGING SYS-
TEM" on page 8-11.
Defective rectifier/regulator or
AC magneto → Replace.
Defective connection in the
charging system circuit → Prop-
erly connect or replace the wire
harness.
8-47
FUEL INJECTION SYSTEM
Confirmation of service com-
—
Turn the main switch to "ON".
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Repeat item 1. If the same
number is indicated, go to item
3.
Confirmation of service com-
Start the engine and let it idle
for approximately 10 seconds.
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Repeat the maintenance job.
pletion
pletion