Yamaha MTN1000 2016 Service Manual page 494

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Fault code No.
Item
5
Defective EXUP valve, pulley,
and cables.
6
Malfunction in ECU.
7
Delete the fault code and check
that the engine trouble warning
light goes off.
Fault code No. P048D, P048E
TIP
If fault code numbers "P048D/P048E" and "P0476" are both indicated, take the actions specified for
fault code number "P048D/P048E" first.
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Actuation
Procedure
Probable cause of
Item
malfunction and check
1
Connection of EXUP servo
motor coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
P0476
EXUP servo motor: stuck EXUP servo motor is detected.
Turn the EXUP valve manually
with the cables disconnected.
Replace if defective.
Replace the ECU.
Refer to "REPLACING THE
ECU (Engine Control Unit)" on
page 8-194.
Confirm that the fault code has
a condition of "Recovered"
using the Yamaha diagnostic
tool, and then delete the fault
code.
P048D, P048E
[P048D] EXUP servo motor: open or ground short circuit detected.
[P048E] EXUP servo motor: power short circuit detected.
Able to start engine
Able to drive vehicle
53
After the EXUP is fully closed, it stops at the opening base position (inter-
mediate position).
This operation takes approximately 3 seconds during which the "check"
indicator is displayed on the Yamaha diagnostic tool.
Check the operating sound.
Maintenance job
Improperly connected  Con-
nect the coupler securely or
replace the wire harness.
8-77
FUEL INJECTION SYSTEM
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the Yamaha
diagnostic tool.
Conditions is "Recovered"  Go
to item 7 and finish the service.
Conditions is "Detected"  Go
to item 6.
Service is finished.
Confirmation of service com-
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the Yamaha
diagnostic tool.
Condition is "Recovered"  Go
to item 6 and finish the service.
Condition is "Detected"  Go to
item 2.
pletion

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