Yamaha Wolverine YX70EPNG Service Manual page 435

Fault code No.
Item
2 "01" is indicated in diagnostic
mode (code No. 60). EEPROM
data error for adjustment of CO
concentration.
3 Malfunction in ECU.
Fault code No. 46
TIP
If fault code numbers "37" and "46" are both indicated, take the actions specified for fault code number
"46" first.
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Indicated
Procedure
Probable cause of malfunc-
Item
tion and check
1 Malfunction in charging system. Check the charging system.
Fault code No. 50
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Indicated
Procedure
Probable cause of malfunc-
Item
tion and check
44
EEPROM fault code number: an error is detected while reading or
writing on EEPROM.
Change the CO concentration,
and rewrite in EEPROM.
Refer to "ADJUSTING THE EX-
HAUST GAS VOLUME" on
page 3-7.
After this adjustment is made,
the memory is not recovered
when the main switch is turned
to " " (off).
Replace the ECU.
46
Charging voltage is abnormal.
Able to start engine
Able to drive vehicle
—
—
—
Maintenance job
Refer to "CHARGING SYS-
TEM" on page 9-11.
Defective rectifier/regulator or
AC magneto → Replace.
Defective connection in the
charging system circuit → Prop-
erly connect or replace the wire
harness.
50
Faulty ECU (Engine Control Unit) memory. (When this malfunction is
detected in the ECU, the fault code number might not appear.)
Unable to start engine
Unable to drive vehicle
—
—
—
Maintenance job
9-60
FUEL INJECTION SYSTEM
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 5 seconds.
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Repeat the maintenance job.
Confirmation of service com-
"
pletion
pletion