Yamaha MTN850-A 2017 Service Manual page 422

Fault code No.
Item
2 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).
3 Wire harness continuity.
4 Installed condition of cylinder-#2
ignition coil.
5 Defective cylinder-#2 ignition
coil.
6 Malfunction in ECU.
7 Delete the fault code and check
that the engine trouble warning
light goes off.
P0352
Cylinder-#2 ignition coil: open or short circuit detected in the pri-
mary lead of the cylinder-#2 ignition coil.
Improperly connected  Con-
nect the coupler securely or
replace the wire harness.
Open or short circuit  Replace
the wire harness.
Between cylinder-#2 ignition coil
coupler and ECU coupler.
gray/red–gray/red
Between cylinder-#2 ignition coil
coupler and handlebar switch
coupler (right).
red/black–red/black
Check for looseness or pinch-
ing.
Improperly installed ignition coil
 Reinstall or replace the igni-
tion coil.
Measure the primary coil resis-
tance of the cylinder-#2 ignition
coil.
Replace if out of specification.
Refer to "CHECKING THE
IGNITION COILS" on page
8-163.
Execute the diagnostic mode.
(Code No. 31)
No spark  Replace the ECU.
Refer to "REPLACING THE
ECU (Engine Control Unit)" on
page 8-157.
Confirm that the fault code has
a condition of "Recovered"
using the Yamaha diagnostic
tool, and then delete the fault
code.
8-65
FUEL INJECTION SYSTEM
Start the engine and let it idle for
approximately 5 seconds.
Check the condition of the fault
code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is "Recovered"  Go
to item 7 and finish the service.
Condition is "Detected"  Go to
item 3.
Start the engine and let it idle for
approximately 5 seconds.
Check the condition of the fault
code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is "Recovered"  Go
to item 7 and finish the service.
Condition is "Detected"  Go to
item 4.
Start the engine and let it idle for
approximately 5 seconds.
Check the condition of the fault
code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is "Recovered"  Go
to item 7 and finish the service.
Condition is "Detected"  Go to
item 5.
Start the engine and let it idle for
approximately 5 seconds.
Check the condition of the fault
code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is "Recovered"  Go
to item 7 and finish the service.
Condition is "Detected"  Go to
item 6.
Service is finished.