Yamaha Tenere 700 2020, Service Manual

Page: 363 / 472

FUEL INJECTION SYSTEM
8-52
Fault code No. P0202
6 Malfunction in ECU. Replace the ECU.
Refer to “REPLACING THE
ECU (engine control unit)” on
page 8-130. Service is finished.
7 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 “Recover” using
the malfunction mode of the
Yamaha diagnostic tool, and
then delete the fault code.
Fault code No. P0202
Item Fuel injector #2: malfunction in fuel injector #2.
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. 37
Actuation
Actuates fuel injector #2 five times at one-second intervals.
The 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 #2 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 #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). Improperly connected
→
Con-
nect the coupler securely or re-
place the wire harness.
Execute the diagnostic mode.
(Code No. 37)
Operating sound
→
Go to item
7.
No operating sound
→
Go to
item 2.
2 Defective fuel injector #2. Measure the fuel injector resis-
tance.
Replace if out of specification.
Refer to “CHECKING THE
FUEL INJECTORS” on page
8-140. Execute the diagnostic mode.
(Code No. 37)
Operating sound
→
Go to item
7.
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 re-
place the wire harness.
Execute the diagnostic mode.
(Code No. 37)
Operating sound
→
Go to item
7.
No operating sound
→
Go to
item 4.
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). Improperly connected
→
Con-
nect the coupler securely or re-
place the sub-wire harness.
Execute the diagnostic mode.
(Code No. 37)
Operating sound
→
Go to item
7.
No operating sound
→
Go to
item 5.