FUEL INJECTION SYSTEM
8-56
Fault code No. P0201
Fault code No. P0201
Item Fuel injector #1: malfunction in fuel injector #1.
Fail-safe system
Able to start engine (depending on the number of faulty cylinders)
Able to drive vehicle (depending on the number of faulty cylinders)
Diagnostic code No. 36
Actuation
Actuates fuel injector #1 five times at one-second intervals.
The “check” indicator on the Yamaha diagnostic tool screen comes on
each time the fuel injector is actuated.
Procedure
Disconnect the fuel pump coupler. Check that fuel injector #1 is actuated
five times by listening for the operating sound.
Item
Probable cause of malfunc-
tion and check
Maintenance job
Confirmation of service com-
pletion
1 Connection of fuel injector #1
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).
Improperly connected Con-
nect the coupler securely or
replace the wire harness.
Execute the diagnostic mode.
(Code No. 36)
Operating sound Go to item
6.
No operating sound Go to
item 2.
2 Defective fuel injector #1. Measure the fuel injector resis-
tance.
Replace if out of specification.
Refer to “CHECKING THE
FUEL INJECTORS” on page
8-174.
Execute the diagnostic mode.
(Code No. 36)
Operating sound Go to item
6.
No operating sound Go to
item 3.
3 Connection of ECU 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).
Improperly connected Con-
nect the coupler securely or
replace the wire harness.
Execute the diagnostic mode.
(Code No. 36)
Operating sound Go to item
6.
No operating sound Go to
item 4.
4 Wire harness continuity. Open or short circuit Replace
the wire harness.
Between fuel injector coupler
and ECU coupler.
red/black–red/black
Between fuel injector coupler
and relay unit coupler.
red/blue–red/blue
Execute the diagnostic mode.
(Code No. 36)
Operating sound Go to item
6.
No operating sound Go to
item 5.
5 Malfunction in ECU. Replace the ECU.
Refer to “REPLACING THE
ECU (Engine Control Unit)” on
page 8-157.
6 Delete the fault code and check
that the engine trouble warning
light goes off.
Start the engine and let it idle for
approximately 5 seconds.
Confirm that the fault code has
a condition of “Recovered”
using the malfunction mode of
the Yamaha diagnostic tool, and
then delete the fault code.
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