Yamaha TRACER MT09TRA Service Manual page 437

Fault code No.
Item
2 Defective intake air pressure
sensor 2.
3 Malfunction in ECU.
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
Procedure
Item Probable cause of
malfunction and check
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 wire harness
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).
20
Intake air pressure sensor 1 or intake air pressure sensor 2: when
the main switch is turned to "ON", the intake air pressure sensor 1
voltage and intake air pressure sensor 2 voltage differ greatly.
Execute the diagnostic mode.
(Code No. 04)
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 intake air pressure
sensor 2.
Replace if defective.
Refer to "CHECKING THE
INTAKE AIR PRESSURE SEN-
SOR" on page 8-146.
Replace the ECU.
Refer to "REPLACING THE
ECU (engine control unit)" on
page 8-132.
21
Coolant temperature sensor: open or short circuit detected.
Able to start engine
Able to drive vehicle
06
Displays the coolant temperature.
Compare the actually measured coolant temperature with the meter dis-
play value.
Maintenance job
Improperly connected  Con-
nect the coupler securely or
replace the wire harness.
Improperly connected  Con-
nect the coupler securely or
replace the wire harness.
8-46
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 3.
Confirmation of service com-
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.
pletion