Yamaha 2016 Grizzly yf700gg, Service Manual

Page: 409 / 474

FUEL INJECTION SYSTEM
9-54
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. 50
Fault code No. Er-1
Fault code No. 46
Item Charging voltage is abnormal.
Fail-safe system
Able to start engine
Able to drive vehicle
Diagnostic code No. —
Indicated —
Procedure —
Item
Probable cause of malfunc-
tion and check
Maintenance job
Confirmation of service com-
pletion
1 Malfunction in charging system. Check the charging system.
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.
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.
Fault code No. 50
Item
Faulty ECU (Engine Control Unit) memory. (When this malfunction is
detected in the ECU, the fault code number might not appear.)
Fail-safe system
Unable to start engine
Unable to drive vehicle
Diagnostic code No. —
Indicated —
Procedure —
Item
Probable cause of malfunc-
tion and check
Maintenance job
Confirmation of service com-
pletion
1 Malfunction in ECU. Replace the ECU. Turn the main switch to “ ”
(on).
Check that the fault code num-
ber is not displayed.
Fault code No. Er-1
Item
ECU (Engine Control Unit) internal malfunction (output signal error):
signals cannot be transmitted between the ECU and the multi-func-
tion meter.
Fail-safe system
Able to start engine (unable when ECU is malfunctioning)
Able to drive vehicle (unable when ECU is malfunctioning)
Diagnostic code No. —