Kawasaki J300 - Service manual > Oxygen Sensor - not activated (Service Code 17, Equipped Models)

Oxygen Sensor Removal/Installation

• Refer to the Oxygen Sensor Removal/Installation in the Electrical System chapter.

Oxygen Sensor Inspection

• Remove:
  Storage Box (see Storage Box Removal in the Frame chapter)
  Oxygen Sensor Lead Connector [A]

• Connect the measuring adapter [A] between the harness connector and oxygen sensor lead connector.

  Main Harness [B]
  Oxygen Sensor [C]

Special Tool - Measuring Adapter: 57001-1700

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

Oxygen Sensor Output Voltage
 Connections to Adapter:
  Digital Meter (+) → R (sensor BK) lead
  Digital Meter (-) → BK (sensor GY) lead

• Warm up the engine thoroughly until the radiator fan starts.
• Measure the output voltage with the connector joined.

Output Voltage
 Standard: DC 0.7 V or more (Rich: AF bellow 14.7)
  DC 0.18 V or less (Lean: AF over 14.7)

• Turn the ignition switch off.

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] ←→
  Oxygen Sensor Connector [B]
   GY/W lead (ECU terminal 3) [C]
   G/P lead (ECU terminal 4) [D]

If the wiring is good, replace the sensor.

If the reading is within the standard, 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).

Oxygen Sensor Circuit

1. ECU
2. Engine Stop Switch
3. Fuse Box
4. Ignition Fuse 15 A
5. Charging/ECU Fuse 30 A
6. Ignition Switch
7. Side Stand Switch
8. Battery
9. Engine Ground
10. Frame Ground 1
11. ECU Relay
12. Oxygen Sensor

See also: