Yamaha Tracer MT09TRAH 2017 Service Manual page 428

Fault code No. P0202
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Actuation
Procedure
Probable cause of malfunc-
Item
tion and check
1 Connection of fuel injector #2
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).
2 Defective fuel injector #2.
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).
4 Connection of sub-wire har-
ness 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).
5 Wire harness continuity.
P0202
Fuel injector #2: malfunction in fuel injector #2.
Able to start engine (depending on the number of faulty cylinders)
Able to drive vehicle (depending on the number of faulty cylinders)
37
Actuates fuel injector #2 five times at one-second intervals.
The "check" indicator on the Yamaha diagnostic tool screen comes on
each time the fuel injector is actuated.
Disconnect the fuel pump coupler. Check that fuel injector #2 is actuated
five times by listening for the operating sound.
Maintenance job
Improperly connected  Con-
nect the coupler securely or
replace the wire harness.
Measure the fuel injector resis-
tance.
Replace if out of specification.
Refer to "CHECKING THE
FUEL INJECTORS" on page
8-174.
Improperly connected  Con-
nect the coupler securely or
replace the wire harness.
Improperly connected  Con-
nect the coupler securely or
replace the sub-wire harness.
Open or short circuit  Replace
the wire harness.
Between fuel injector coupler
and sub-wire harness coupler.
green/black–green/black
red/blue–red/blue
Between sub-wire harness cou-
pler and ECU coupler.
green/black–green/black
Between sub-wire harness cou-
pler and relay unit coupler.
red/blue–red/blue
8-57
FUEL INJECTION SYSTEM
Confirmation of service com-
Execute the diagnostic mode.
(Code No. 37)
Operating sound  Go to item
7.
No operating sound  Go to
item 2.
Execute the diagnostic mode.
(Code No. 37)
Operating sound  Go to item
7.
No operating sound  Go to
item 3.
Execute the diagnostic mode.
(Code No. 37)
Operating sound  Go to item
7.
No operating sound  Go to
item 4.
Execute the diagnostic mode.
(Code No. 37)
Operating sound  Go to item
7.
No operating sound  Go to
item 5.
Execute the diagnostic mode.
(Code No. 37)
Operating sound  Go to item
7.
No operating sound  Go to
item 6.
pletion