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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 ...

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Purpose The rear map lights shine light at the center of the vehicle interior. Function The rear map lights illuminate when the interior light switch is in the ON position or the map light switch is turned on. The rear map lights illuminate according to the lock condit ...

Push Button Start Removal/Installation
1. Disconnect the negative battery cable.. 2. Remove the meter hood.. 3. While pressing the push button start tab in the direction of the arrow (1) shown in the figure, push out the push button start in the direction of the arrow (2) shown in the figure to detach the push button start tab fr ...

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1. Disconnect the negative battery cable.. 2. Remove the following parts: a. Inner garnish. b. Front door trim. 3. Disconnect the front door speaker connector.. 4. Verify that the resistance and continuity between the front door speaker terminals is as indicated in the table. ...

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