Yamaha 2016 Grizzly yfm700gplg, Service Manual

Page: 392 / 474

FUEL INJECTION SYSTEM
9-37
Indicated Displays the intake air pressure.
Procedure
Set the engine stop switch to “ ”, and then operate the throttle while
pushing the start switch “ ”. (If the display value changes, the perfor-
mance is OK.)
Item
Probable cause of malfunc-
tion and check
Maintenance job
Confirmation of service com-
pletion
1 Connection of intake air pres-
sure 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). Improperly connected
→
Con-
nect the coupler securely or re-
place the wire harness.
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.
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). Improperly connected
→
Con-
nect the coupler securely or re-
place the wire harness.
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.
3 Wire harness continuity. Open or short circuit
→
Replace
the wire harness.
Between intake air pressure
sensor coupler and ECU cou-
pler.
pink–pink
Between intake air pressure
sensor coupler and joint cou-
pler.
blue–blue
black/blue–black/blue
Between joint coupler and ECU
coupler.
blue–blue
black/blue–black/blue
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.
4 Installed condition of intake air
pressure sensor.
Check for looseness or pinch-
ing. Improperly installed sensor
→
Reinstall or replace the sensor.
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.
Fault code No. 13
Item Intake air pressure sensor: open or short circuit detected.