Yamaha MTN1000 2016 Service Manual page 459

Fault code No.
Item
3 Wire harness continuity.
4 Defective O sensor 2 heater.
2
5 Malfunction in ECU.
6 Delete the fault code and check
that the engine trouble warning
light goes off.
P0050
O sensor 2 heater: defective heater controller detected.
2
Open or short circuit  Properly
connect or replace the wire har-
ness.
Between O sensor 2 coupler
2
and ECU coupler.
pink/white–pink/white
Between O sensor 2 coupler
2
and joint coupler.
red/white–red/white
Between main switch and igni-
tion fuse.
brown/blue–brown/blue
Between ignition fuse and joint
coupler.
red/white–red/white
Replace the O
2
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.
8-42
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.
Condition is "Recovered"  Go
to item 6 and finish the service.
Condition is "Detected"  Start
the engine, and then check the
condition of the fault code.
Condition is "Recovered"  Go
to item 6 and finish the service.
Condition is "Detected"  Go to
item 4.
TIP
For this check, also set the
start/engine stop switch to "ON".
sensor 2. 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"  Start
the engine, and then check the
condition of the fault code.
Condition is "Recovered"  Go
to item 6 and finish the service.
Condition is "Detected"  Go to
item 5.
TIP
For this check, also set the
start/engine stop switch to "ON".
Service is finished.