Kawasaki J300 - Service manual > Oxygen Sensor Heater (Service Code 45)
Oxygen Sensor Heater Removal/Installation
The oxygen sensor heater is built in the oxygen sensor.
So, the heater itself can not be removed. Remove the oxygen sensor (see Oxygen Sensor Removal) in the Electrical System chapter).
Oxygen Sensor Heater Resistance Inspection
- Turn the ignition switch off.
- Remove the storage box (see Storage Box Removal in the Frame chapter).
- Disconnect the oxygen sensor lead connector [A].
- Connect a digital meter [A] to the terminals in the oxygen sensor lead connector [B].
- Measure the oxygen sensor heater resistance.
Oxygen Sensor Heater Resistance
Connections: W lead [C] ←→ W lead [D]
Standard: 6.7 - 9.5 Ω @20º (68ºF)
- If the reading is out of the standard, replace the sensor.
Oxygen Sensor Heater Power Source Voltage Inspection
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 oxygen sensor lead connector and connect the measuring adapter [A] between these connectors.
Main Harness [B]
Oxygen Sensor [C]
Special Tool - Measuring Adapter: 57001-1700
- Connect a digitalmeter [D] to the measuring adapter lead.
Oxygen Sensor Heater Power Source Voltage
Connections to Adapter:
Digital Meter (+) → R (main harness GY/BK) lead
Digital Meter (-) → Frame Ground terminal
- Measure the power source voltage with the engine stopped and with the connector joined.
- Turn the ignition switch on.
Power Source Voltage
Standard: Battery Voltage
- Turn the ignition switch off.
If the reading is in specification, but the problem still exists, replace the ECU (see ECU Removal/Installation).
If the reading is out of the standard, check the power source wiring (see Oxygen Sensor Circuit).
If the wiring is good, 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 Connectors [B]
GY/BK lead (ECU terminal 22) [C]
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).
Oxygen Sensor Circuit
- ECU
- Engine Stop Switch
- Fuse Box
- Ignition Fuse 15 A
- Charging/ECU Fuse 30 A
- Ignition Switch
- Side Stand Switch
- Battery
- Engine Ground
- Frame Ground 1
- ECU Relay
- Oxygen Sensor
See also:
Kawasaki J300 - Service manual > Fuel Pump Relay (Service Code 41)
Fuel Pump Relay Removal NOTICE Never drop the fuel pump relay especially on a hard surface. Such a shock to the relay can damage it. Remove the front fairing (see Front Fairing Removal in the Frame chapter). Remove the fuel pump relay [A] and disconnect the connector.
Kawasaki J300 - Service manual > Idle Speed Control Valve Actuator (Service Code 49)
Idle Speed Control Valve Actuator Removal NOTICE Never drop the idle speed control valve actuator especially on a hard surface. Such a shock to the actuator can damage it. Remove the storage box (see Storage Box Removal in the Frame chapter). Disconnect the idle speed control valve actuator connector [A]. Remove: Retainer Mounting Screws [B] Idle Speed Control Valve Actuator [C] with Retainer
