Yamaha XP500 Service Manual page 460

Fault code No. 14
Used diagnostic code No. 03 (intake air pressure sensor)
Order Inspection operation item and
probable cause
1 Intake air pressure sensor hose is
detached, clogged, kinked, or
pinched.
Intake air pressure sensor mal-
function at intermediate electrical
potential.
2 Defective intake air pressure sen-
sor.
Fault code No. 15
Used diagnostic code No. 01 (throttle position sensor)
Order Inspection operation item and
probable cause
1 Defective throttle position sensor.
2 Open or short circuit in wiring har-
ness.
3 Installed condition of throttle posi-
tion sensor.
4 Connected condition of connector
Inspect the coupler for any pins
that may have pulled out.
Check the locking condition of the
coupler.
Fault code No. 16
Used diagnostic code No. 01 (throttle position sensor)
Order Inspection operation item and
probable cause
1 Defective throttle position sensor
2 Installed condition of throttle posi-
tion sensor.
FUEL INJECTION SYSTEM
Symptom Intake air pressure sensor - hose system malfunction (clogged or detached
hose).
Operation item and countermeasure
Repair or replace the sensor hose.
Inspect and repair the connection.
Replace if defective.
Refer to "Fault code No. 13".
Symptom Throttle position sensor - open or short circuit detected.
Operation item and countermeasure
Replace if defective.
Refer to "THROTTLE BODY".
Repair or replace if there is an open or short circuit.
Between sensor coupler and ECU (engine) coupler
black/blue – black/blue
yellow – yellow
blue – blue
Check the installed area for looseness or pinching.
Check that it is installed in the specified position.
Refer to "THROTTLE BODY".
If there is a malfunction, repair it and connect it
securely.
Throttle position sensor coupler
Main wiring harness ECU (engine) coupler
Symptom Stuck throttle position sensor detected.
Operation item and countermeasure
Replace if defective.
Refer to "THROTTLE BODY".
Check the installed area for looseness or pinching.
Check that it is installed in the specified position.
Refer to "THROTTLE BODY".
7 - 15
FI
Reinstatement
method
Reinstated by
starting the engine
and operating it at
idle.
Reinstatement
method
Reinstated by turn-
ing the main switch
ON.
Reinstatement
method
Reinstated by
starting the engine,
operating it at idle,
and then racing it.