Kawasaki STX-15F service manual Inlet Air Pressure Sensor Service Code/Character-12/bOSt

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.