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Mazda CX-5 Service & Repair Manual: Heated Oxygen Sensor (HO2 S) Inspection

Mazda CX-5 Service & Repair Manual / Engine / Control / Heated Oxygen Sensor (HO2 S) Inspection

HO2S Inspection

1. Connect the M-MDS to the DLC?2.

2. Switch the ignition ON (engine 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 output voltage (PID: O2S12) is 0.3 V or less

while decelerating as shown in the figure.


HO2S Heater Inspection

WARNING:

1. Disconnect the negative battery cable..

2. Lift up the vehicle.

3. Remove the floor under cover. (vehicles with floor under cover).

4. Disconnect the HO2S connector.

5. Measure the resistance between HO2S terminals C and D.


Heated Oxygen Sensor (HO2 S) Heater Control
Outline Based on the control of the HO2S heater, a stabilized oxygen concentration is detected even at low exhaust temperatures, and feedback control of fuel injection even at cold engine ...

Heated Oxygen Sensor (HO2 S) Removal/Installation
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. CAUTION: Do not allow fla ...

Other materials:

Instrument Cluster Disassembly/Assembly
CAUTION: If the instrument cluster is hit forcefully during disassembly such as by being dropped, it could get damaged and the system may not operate normally. When disassembling the instrument cluster, perform the procedure on a workbench on clean clothes being careful not to drop ...

Active Command Modes Inspection [Rear Body Control Module (Rbcm)]
1. Connect the M-MDS to the DLC-2. 2. After the vehicle is identified, select the following items from the initialization screen of the M-MDS. a. Select “DataLogger”. b. Select “Modules”. c. Select “R_BCM”. 3. Select the simulation items from the PID table. 4. Perform the a ...

Front Lower Arm Inspection
1. Remove the front lower arm.. 2. Inspect the front lower arm for bending or damage, and the front lower arm ball joint for excessive looseness. If there is any malfunction, replace the front lower arm. 3. Rotate the front lower arm ball joint stud 5 times. Install the SST ...

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