Yamaha FJR1300A(D) - Page 499

FUEL INJECTION SYSTEM
8-50
2 Defective atmospheric pres-
sure sensor.
Execute the diagnostic
mode. (Code No. 02)
When engine is stopped:
Atmospheric pressure at the
current altitude and weather
conditions is indicated.
0 m above sea level: Approx.
101 kPa (757.6 mmHg, 29.8
inHg)
3000 m (9800 ft) above sea
level: Approx. 70 kPa (525.0
mmHg, 20.7 inHg)
Displayed value is incorrect
→ Check the atmospheric
pressure sensor.
Replace if defective.
Refer to “CHECKING THE
ATMOSPHERIC PRES-
SURE SENSOR” on page
8-190.
Turn the main switch to “ON”.
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 3.
3 Malfunction in ECU. Replace the ECU.
Refer to “REPLACING THE
ECU (engine control unit)” on
page 8-174.
Fault code No. 21
Item Coolant temperature sensor: open or short circuit detected.
Fail-safe system
Able to start engine
Able to drive vehicle
Diagnostic code No. 06
Meter display Displays the coolant temperature.
Procedure
Compare the actually measured coolant temperature with the
meter display value.
Item
Probable cause of mal-
function and check
Maintenance job
Confirmation of service
completion
1 Connection of coolant tem-
perature sensor coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins).
Improperly connected →
Connect the coupler secure-
ly or replace the wire har-
ness.
Turn the main switch to “ON”.
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 2.
Fault code No. 20
Item
Intake air pressure sensor or atmospheric pressure sensor:
when the main switch is turned to “ON”, the intake air pres-
sure sensor voltage and atmospheric pressure sensor voltage
differ greatly.