Mazda 3 manuals

Mazda 3 Service Manual: Heated Oxygen Sensor (HO2 S) Inspection [Mzr 2.0, Mzr 2.5]

Mazda 3 Service Manual / Engine / Control / Sensors, Switches, Relays / Heated Oxygen Sensor (HO2 S) Inspection [Mzr 2.0, Mzr 2.5]

HO2S Inspection

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


2. Switch the ignition to 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 outputs a voltage of 0.6 V or more

, one time or more, then verify that the HO2S voltage (PID: O2S12) is 0.3 V or less

while decelerating as shown in the figure.


HO2S Heater Inspection

WARNING:

1. Remove the battery cover..

2. Disconnect the negative battery cable..

3. Disconnect the HO2S connector.

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


Engine Coolant Temperature (ECT) Sensor Removal/Installation [Mzr 2.0, Mzr 2.5]
WARNING: When the engine is hot, it can badly burn. Turn off the engine and wait until it is cool before removing the ECT sensor. ECT Sensor No.1 1. Remove the battery cover.. 2. D ...

Heated Oxygen Sensor (HO2 S) Removal/Installation [Mzr 2.0, Mzr 2.5]
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. 1. Remove the battery cover.. 2 ...

Other materials:

Front Door Speaker Removal/Installation
1. Disconnect the negative battery cable.. 2. Remove the inner garnish.. 3. Remove the front door trim.. 4. Disconnect the connector. Without Bose® With Bose® 5. Remove the screw. 6. Remove the front door speaker in the direction of the arrow shown in the figure. Without Bose® ...

Operating the Radio
Radio ON Press a band selector button ( ) to turn the radio on. Band selection Successively pressing the band selector button ( ) switches the bands as follows: FM1→FM2→AM. The selected mode will be indicated. NOTE If the FM broadcast signal becomes weak, reception auto ...

Front Fog Light Relay Removal/Installation
1. Disconnect the negative battery cable.. 2. Remove the front mudguard.(RH). 3. Remove the front fog light relay case. 4. Remove the cover. 5. Remove the front fog light relay. 6. Install in the reverse order of removal.. Front Fog Light Relay Installation Note 1. Install the front ...

© 2016-2025 Copyright www.mazda3tech.com