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:

Rear Center Speaker Inspection
1. Disconnect the negative battery cable.. 2. Remove the following parts: a. Rear seat cushion. b. Rear scuff plate. c. Tire house trim. d. C-pillar trim. e. Rear package trim. f. Rear center speaker. 3. Verify the resistance between the rear center speaker terminals. If ...

When Liftgate/Trunk Lid Cannot be Opened
If the vehicle battery is dead or there is a malfunction in the electrical system and the liftgate/trunk lid cannot be opened, perform the following procedure as an emergency measure to open it: (5–door) Remove the cap on the interior surface of the liftgate with a flathead screwdriver. ...

Sunlight/Temperature Sensor
The climate control system measures inside and outside temperatures, and sunlight. It then sets temperatures inside the passenger compartment accordingly. CAUTION Do not obstruct either sensor, otherwise the climate control system will not operate properly. ...

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