Kawasaki J300 - Service manual > Intake Air Pressure Sensor (Service Code 09)

Intake Air Pressure Sensor Removal

NOTICE Never drop the intake air pressure sensor especially on a hard surface. Such a shock to the sensor can damage it.

• Remove the storage box (see Storage Box Removal in the Frame chapter).
• Disconnect the intake air pressure sensor connector [A].
• Remove:
  Screw [B]
  Plate [C]
  Intake Air Pressure Sensor [D]

Intake Air Pressure Sensor Installation

• Replace the O-ring [A] with a new one.

• Install the intake air pressure sensor [A] to the throttle body assy.
• Install the plate so that the projection [B] on the plate fits to the hollow [C] on the throttle body assy.
• Tighten the screw.
• Connect the intake air pressure sensor connector.
• Reset the throttle sensor position and idle speed control valve actuator position (see How to Reset Throttle Sensor Position and Idle Speed Control Valve Actuator Position).

Intake Air Pressure Sensor Input Voltage Inspection

NOTE

• Be sure the battery is fully charged.

NOTE

• Be sure the battery is fully charged.

 

• Turn the ignition switch off.
• Remove the storage box (see Storage Box Removal in the Frame chapter).
• Disconnect the intake air pressure sensor connector and connect the measuring adapter [A] between these connectors.

  [B] Main Harness
  [C] Intake Air Pressure Sensor

Special Tool - Measuring Adapter: 57001-1700

• Connect a digital meter [D] to the measuring adapter leads.

Intake Air Pressure Sensor Input Voltage
 Connections to Adapter:
  Digital Meter (+) → R (sensor V/R) lead
  Digital Meter (-) → BK (sensor G/P) lead

• Measure the input voltage with the engine stopped and with the connector joined.
• Turn the ignition switch on.

Input Voltage
 Standard: DC 5 V

• Turn the ignition switch off.

  If the reading is within the standard, check the output voltage (see Intake Air Pressure Sensor Output Voltage Inspection).

  If the reading is out of the standard, remove the ECU and check the wiring for continuity between harness connectors.

  • Disconnect the ECU and sensor connectors.

Wiring Continuity Inspection
 ECU Connector [A] ←→
  Intake Air Pressure Sensor Connector [B]
   V/R lead (ECU terminal 6) [C]
   G/P lead (ECU terminal 4) [D]

If the wiring is good, check the ECU for its ground and power supply (see ECU Power Supply Inspection).

If the ground and power supply are good, replace the ECU (see ECU Removal/Installation).

• Reset the throttle sensor position and idle speed control valve actuator position (see How to Reset Throttle Sensor Position and Idle Speed Control Valve Actuator Position).

Intake Air Pressure Sensor Output Voltage Inspection

• Measure the output voltage at the intake air pressure sensor in the same way as input voltage inspection, note the following.
  • Disconnect the intake air pressure sensor connector and connect the measuring adapter [A] between these connectors.

[B] Main Harness
[C] Intake Air Pressure Sensor
[D] Digital Meter

Special Tool - Measuring Adapter: 57001-1700

Intake Air Pressure Sensor Output Voltage
 Connections to Adapter:
  Digital Meter (+) → Y (sensor BK/Y) lead
  Digital Meter (-) → BK (sensor G/P) lead

• Measure the output voltage with the engine stopped and with the connector joined.
• Turn the ignition switch on.

Output Voltage
 Usable Range: DC 1.0 - 4.2 V [13.3 kPa (9.98 cmHg) - 120 kPa (90.0 cmHg)]

NOTE

• The output voltage changes according to the local atmospheric pressure.

 

• Turn the ignition switch off.

  If the reading is out of the usable range, replace the sensor.

  If the reading is within the usable range, remove the ECU and check the wiring for continuity between harness connectors.

  • Disconnect the ECU and sensor connectors.

Wiring Continuity Inspection
 ECU Connector [A] ←→
  Intake Air Pressure Sensor Connector [B]
   BK/Y lead (ECU terminal 27) [C]
   G/P lead (ECU terminal 4) [D]

If the wiring is good, check the ECU for its ground and power supply (see ECU Power Supply Inspection).

If the ground and power supply are good, replace the ECU (see ECU Removal/Installation).

• Reset the throttle sensor position and idle speed control valve actuator position (see How to Reset Throttle Sensor Position and Idle Speed Control Valve Actuator Position).

Intake Air Pressure Sensor Circuit

1. ECU
2. Intake Air Pressure Sensor

Water Temperature Sensor (Service Code 12)

Water Temperature Sensor (ECU) Removal/Installation

NOTICE Never drop the water temperature sensor especially on a hard surface. Such a shock to the sensor can damage it.

• Remove the storage box (see Storage Box Removal in the Frame chapter).
• Drain the coolant (see Coolant Change in the Periodic Maintenance chapter).
• Disconnect the water temperature sensor connector [A].
• Remove the water temperature sensor [B].
• Replace the O-ring with a new one.
• Tighten:
  Torque - Water Temperature Sensor (ECU): 12 N*m (1.2 kgf*m, 106 in*lb)
• Fill the engine with coolant and bleed the air from the cooling system (see Coolant Change in the Periodic Maintenance chapter).

Water Temperature Sensor Resistance Inspection

• Refer to the Water Temperature Sensor Inspection in the Electrical System chapter.

  If the reading is within the standard, but the problem still exists, replace the ECU (see ECU Removal/Installation).

Water Temperature Sensor Circuit

1. ECU
2. Water Temperature Sensor (ECU)

See also: