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:

Manifold Absolute Pressure (Map) Sensor/Boost Air Temperature Sensor Removal/Installation [Mzr 2.3 Disi Turbo]
NOTE: Because the boost air temperature sensor is integrated in the MAP sensor, replacing the boost air temperature sensor includes replacement of the MAP sensor/boost air temperature sensor. 1. Remove the battery cover.. 2. Disconnect the negative battery cable.. 3. Remove t ...

Air Bag Module And Pre Tensioner Seat Belt Deployment Procedures [Two Step Deployment Control System]
WARNING: A live (undeployed) air bag module or pre-tensioner seat belt may accidentally operate (deploy) when it is disposed of and cause serious injury. Do not dispose of a live (undeployed) air bag module and pre-tensioner seat belt. If the SSTs (Deployment tool and Adapter harnes ...

A/C Unit Removal/Installation
1. Set the air mix mode to MAX COLD. 2. Disconnect the negative battery cable.. 3. Discharge the refrigerant.. 4. Drain the engine coolant.. 5. Remove the plug hole plate. 6. Remove the charge air cooler cover. (MZR 2.3 DISI Turbo). 7. Remove the insulator. (MZR 2.3 DISI Turbo) 8. ...

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