Warning! The sensor is installed in the exhaust pipe, which, when the engine is running, heats up to a high temperature. To avoid burns, check and remove the oxygen concentration sensor after the engine has cooled to a safe temperature.
To complete the work you will need:
- multimeter (in voltmeter mode);
- viewing hole or flyover.
Examination
1. We prepare the car for work (see "Preparing the car for maintenance and repair").
2. Disconnect the wiring harness connector from the oxygen concentration sensor connector.
3. Connect "negative" voltmeter probe to "mass" engine. Turning on the ignition, check the supply voltage of the heating element at terminal B (the designation of the conclusions is applied on the block of the wiring harness).
Note: The voltage at the output must be at least 12 V. If the voltage is not supplied to the block or it is less than 12 V, then the battery is discharged, the power circuit is faulty or the computer is faulty.
4. Connecting "negative" voltmeter probe to terminal C, measure the voltage between terminals A and C.
Note: The voltage at the terminals should be 0.45 V. If the voltage is not supplied to the block or it differs by more than 0.02 V, the power circuit is faulty or the computer is faulty.
Removing
1. Cut the plastic clamp that secures the oxygen concentration sensor wire harness to the cooling system hose (see photo above).
2. Key by 22 mm unscrew the sensor from the intake pipe and remove the sensor.
Tip: You can verify that the sensor is faulty by replacing it with a known good one.
Installation
Install the sensor in reverse order. Fasten the sensor wiring harness to the coolant hose with a new clamp.
Warning! The sensor harness must not come into contact with the exhaust pipe of the muffler.