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Mazda CX-5 Service & Repair Manual: Heated Oxygen Sensor (HO2 S) Inspection

Mazda CX-5 Service & Repair Manual / Engine / Control / Heated Oxygen Sensor (HO2 S) Inspection

HO2S Inspection

1. Connect the M-MDS to the DLC?2.

2. Switch the ignition ON (engine on).

3. Warm up the engine to normal operating temperature.

4. Access the following PIDs using the M-MDS..

5. Drive the vehicle and decelerate the engine speed by releasing the accelerator pedal fully when the engine speed is 3,000 rpm or more

.

6. Verify that the HO2S output voltage (PID: O2S12) is 0.3 V or less

while decelerating as shown in the figure.


HO2S Heater Inspection

WARNING:

1. Disconnect the negative battery cable..

2. Lift up the vehicle.

3. Remove the floor under cover. (vehicles with floor under cover).

4. Disconnect the HO2S connector.

5. Measure the resistance between HO2S terminals C and D.


Heated Oxygen Sensor (HO2 S) Heater Control
Outline Based on the control of the HO2S heater, a stabilized oxygen concentration is detected even at low exhaust temperatures, and feedback control of fuel injection even at cold engine ...

Heated Oxygen Sensor (HO2 S) Removal/Installation
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. CAUTION: Do not allow fla ...

Other materials:

Customer Assistance (Mexico)
Your complete and permanent satisfaction is our business. We are here to serve you. All Authorized Mazda Dealers have the knowledge and the tools to keep your Mazda vehicle in top condition. If you have any questions or recommendations for improvement regarding the service of your Mazda vehic ...

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Purpose The seat belt warning light warns the driver that a seat belt is not fastened. Function The instrument cluster flashes/illuminates the seat belt warning light based on the following CAN signals: Vehicle speed signal sent from PCM Driver/passenge ...

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