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:

Fuel Filler Lid Opener Cable Removal/Installation
4SD 1. Disconnect the negative battery cable.. 2. Remove the following parts: a. Front seat (LH). b. Front scuff plate (LH). c. Rear scuff plate. d. B-pillar lower trim. e. Rear seat cushion. f. Rear seat back. g. Tire house trim. h. Trunk end trim. i. Trunk side trim (RH). j. ...

C Pillar Trim Removal/Installation
4SD 1. Remove the following parts: a. Rear seat cushion. b. Rear scuff plate. c. Tire house trim. 2. Partially peel back the seaming welt. 3. Pull the C-pillar trim in the direction of the arrow (1), (2) shown in the figure, then detaching clip A and B. 4. Cut the lead wire connec ...

Refrigerant Charging
CAUTION: Do not exceed the specification when charging the system with refrigerant. Doing so will decrease the efficiency of the air conditioner or damage the refrigeration cycle parts. Charging Recycled HFC-134a Refrigerant 1. Connect an HFC-134a recovery/recycling/recharging d ...

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