Kawasaki STX-15F - Manual (Page 87)

FUEL SYSTEM (DFI) 3-33
Inlet Air Pressure Sensor (Service Code/Character-12/bOSt)
CAUTION
Never drop the sensor, especially on a hard surface.
Such a shock to the part can damage it.
Inlet Air Pressure Sensor Removal
•
Turn the ignition switch off.
•
Remove:
Seat (see Hull/Engine Hood chapter)
Inlet Air Pressure Sensor Bolts [A]
Inlet Air Pressure Sensor Connector [B]
Inlet Air Pressure Sensor [C]
Inlet Air Pressure Sensor Installation
•
Apply silicone oil to the O-ring [A].
CAUTION
Do not apply silicone oil to the sensor end (sensing
part) [B] and the inside [C] of the sensor connector.
•
Tighten:
Torque - Inlet Air Pressure Sensor Bolts: 7.8 N·m (0.80
kgf·m, 69 in·lb)
Input Voltage Inspection
NOTE
○
Be sure the battery is fully charged.
○
The inspection is the same as “Input Voltage Inspection”
of the throttle sensor.
•
Turn the ignition switch OFF.
•
Remove the ECU (see ECU Removal). Do not disconnect
the ECU connector.
•
Connect a digital voltmeter [A] to the connector [B], with
the needle adapter set.
Special Tool - Needle Adapter Set: 57001-1457
Inlet Air Pressure Sensor Input Voltage
Connections to ECU
Meter (+)→ R lead (terminal 12)
Meter (–) → BK/W lead (terminal 8)
•
Turn the ignition switch ON and push the lanyard key un-
der the stop button.
•
Pushing the start button, run the engine 5 ∼ 6 seconds at
idling to measure the sensor input voltage.
○
Wait 15 seconds before using the starter again.
Input Voltage at ECU
Standard: 4.75 ∼ 5.25 V DC
•
Turn the ignition switch OFF.
If the reading is less than the standard, check the ECU for
its ground, power supply and wiring. If the ground, power
supply and wiring are good, replace the ECU.