Intake Air Pressure Sensor: Open Or Short Circuit Detected - Yamaha YZF-R25 Service Manual

Fault code No.
Item
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 crankshaft
position sensor.
Check for looseness or pinch-
ing.
5 Defective crankshaft position
sensor.
6 Malfunction in ECU.
Fault code No. 13
ECA20500
NOTICE
Do not remove the throttle body sensor assembly from the throttle body.
TIP
If fault code numbers "13" and "14" are both indicated, take the actions specified for fault code number
"13" first.
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Tool display
Procedure
12
Crankshaft position sensor: no normal signals are received from the
crankshaft position sensor.
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Open or short circuit → Replace
the wire harness.
Between crankshaft position
sensor coupler and ECU cou-
pler.
gray–gray
Between crankshaft position
sensor coupler and ECU cou-
pler.
black/blue–black/blue
Improperly installed sensor →
Reinstall or replace the sensor.
Refer to "GENERATOR AND
STARTER CLUTCH" on page
5-40.
Check the crankshaft position
sensor.
Refer to "CHECKING THE
CRANKSHAFT POSITION
SENSOR" on page 8-89.
Replace if defective.
Replace the ECU.
Refer to "REPLACING THE
ECU (engine control unit)" on
page 8-81.
13

Intake air pressure sensor: open or short circuit detected.

Able to start engine
Able to drive vehicle
03
Displays the intake air pressure.
Set the engine stop switch to "
pushing the start switch "
mance is OK.)
8-38
FUEL INJECTION SYSTEM
Crank the engine.
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 3.
Crank the engine.
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 4.
Crank the engine.
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 5.
Crank the engine.
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 6.
", and then operate the throttle while
". (If the display value changes, the perfor-