Inspection [07/2015 - ]: Procedure
- INSPECT HEATED OXYGEN SENSOR
- PID/DATA Monitor Inspection (HO2S)
- Connect the techstream to the DLC-2.
- Start the engine and warm it up completely.
- Access the following PIDs using the techstream.
Refer to ON-BOARD DIAGNOSTIC TEST [07/2015 - ]
- VSS (Vehicle speed)
- RPM (Engine speed)
- O2S12 (HO2S output voltage)
- Drive the vehicle and decelerate the engine speed by releasing the accelerator pedal fully when the engine speed is 3, 000 rpm or more.
- Verify that the HO2S output voltage (PID: O2S12) changes as shown in the figure during deceleration. (outputs 0.6 V or more once or more, then 0.3 V or less.)
*a VSS *b RPM *c O2S12 *d 0.3 V or Less If not as verified, replace the HO2S.
Refer to REMOVAL [07/2015 - ]
- Resistance Inspection (HO2S Heater)WARNING:
A hot engine and exhaust system can cause severe burns. Turn off the engine and wait until they are cool before removing the exhaust system.
NOTE:Do not allow flammable objects such as the taping for bundling wiring harness to come into contact with the exhaust manifold and silencer.
- Disconnect the negative battery cable.
Refer to REMOVAL [07/2015 - ]
- Lift up the vehicle.
- Remove the insulator.
Refer to REMOVAL [07/2015 - ]
- Disconnect the HO2S connector.
- Measure the resistance between HO2S terminals 1 and 3.
If not as specified, replace the HO2S.
Refer to REMOVAL [07/2015 - ]
HO2S heater resistance
2 to 50 ohms
- Disconnect the negative battery cable.
- PID/DATA Monitor Inspection (HO2S)