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 Shock Absorber And Coil Spring Disassembly/Assembly
WARNING: Removing/installing the shock absorber and coil spring is dangerous. The shock absorber and coil spring could fly off and cause serious injury or death, and damage the vehicle. 1. Remove the front shock absorber and coil spring.. 2. Remove in the order indicated in the ...

Wheel Balance Adjustment
CAUTION: Adjust the outer wheel balance first, then the inner wheel balance. Be careful not to scratch the wheels. Adhesive-type Balance Weight (Outer) 1. Remove the old balance weight from the wheel. 2. Remove the double-sided adhesive tape remaining on the wheel, then clea ...

Clutch Unit Removal/Installation [C66 M R]
1. Remove the battery cover.. 2. Disconnect the negative battery cable.. 3. Remove the aerodynamic under cover No.2 and the splash shield as a single unit.. 4. Drain the manual transaxle oil.. 5. Disconnect and/or remove the following parts in the engine compartment. a. Remove the batte ...

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