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:

Oil Seal (Differential) Replacement [Fw6 A EL]
1. Remove the aerodynamic under cover No.2 and the splash shield as a single unit.. 2. Remove the oil seal. a. Drain the ATF.. b. Disconnect the drive shaft (LH) from the transaxle.. c. Disconnect the drive shaft (RH) from the joint shaft.. d. Remove the joint shaft.. CAUTION: ...

Rear Center Speaker Removal/Installation
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. 3. Remove the screw. 4. Disconnect the connector. 5. Remove the rear center speaker. 6. Install in ...

Ignition Coil Inspection [Mzr 2.0, Mzr 2.5]
Ignition Coil Inspection 1. Perform the spark test and identify the malfunctioning cylinder.. 2. Replace the ignition coil of the malfunctioning cylinder with that of a normal cylinder, and perform the spark test again.. If the spark is not normal due to a malfunctioning ignition coil, ...

2016-2020 Copyright www.mazda3tech.com