Yamaha N MAX GPD150-A 2015 Service Manual page 364

Fault code No.
Item
1 Connection of coolant tempera-
ture sensor 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 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 coolant
temperature sensor.
Check for looseness or pinch-
ing.
5 Defective coolant temperature
sensor.
6 Malfunction in ECU.
Fault code No. 22
ECA20500
NOTICE
Do not remove the throttle body sensor assembly from the throttle body.
TIP
Perform this procedure when the engine is cold.
21
Coolant temperature sensor: open or short circuit detected.
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Open or short circuit → Replace
the wire harness.
Between coolant temperature
sensor coupler and ECU cou-
pler.
Green/Red–Green/Red
Black/Blue–Black/Blue
Improperly installed sensor →
Reinstall or replace the sensor.
Refer to "CYLINDER HEAD" on
page 5-9.
Execute the diagnostic mode.
(Code No. 06)
When engine is cold:
Displayed temperature is close
to the ambient temperature.
The displayed temperature is
not close to the ambient temper-
ature → Check the coolant tem-
perature sensor.
Replace if defective.
Refer to "CHECKING THE
COOLANT TEMPERATURE
SENSOR" on page 8-108.
Replace the ECU.
Refer to "REPLACING THE
ECU (engine control unit)" on
page 8-99.
8-39
FUEL INJECTION SYSTEM
Turn the main switch to "ON".
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 2.
Turn the main switch to "ON".
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 3.
Turn the main switch to "ON".
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 4.
Turn the main switch to "ON".
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 5.
Turn the main switch to "ON".
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 6.