Operating Guide for MAZDA Diesel Particulate Filter. Some MAZDA models ... 3.
DPF Regeneration. The most important function is the DPF regeneration.
Operating Guide for MAZDA Diesel Particulate Filter Some MAZDA models (Europe) with the diesel engine are equipped with Diesel Particulate Filter (short for DPF). Diesel Particulate Filter contains three main procedures: 1. DPF Reset 2. DPF Assessment 3. DPF Regeneration The most important function is the DPF regeneration. The particulate in the exhaust gas from the diesel engine is trapped inside the air hole or at the inlet. As the time goes on, the more it becomes, the more pressure will be lost. When the pressure reaches the lower limit, the filter regeneration must be performed in order to maintain the engine performance. In general, the DPF regeneration is accomplished by increasing the air temperature in the filter enough to burn the particulate. The combustion characteristic of particulate is related to the oxygen concentration in the exhaust. Generally, the combustion occurs at 550-650°C. The exhaust temperature can be increased by either regulating valve opening or lighting the combustor, in some time, the catalyst can also be used, which can decrease the combustion temperature of particulate and accelerate the process of the accumulated particulate burning. Through this method, the differential pressure is recovered to normal and the filter is regenerated and can work functionally. 1. Diagnose: Select "Calling system" or select by DLC (See Figure 1), and wait for 1-2 minutes. Then the Vehicle Specification screen displays (See Figure 2).
Figure 1
Figure 2
1
2. Select "PCM" in "Select System" (See Figure 3) and "Powertrain" in the "FUNCTION MENU" (See Figure 4).
Figure 3 Figure 4 3. Operate following the function menus (See Figure 5 and Figure 6):
Figure 5
Figure 6
1) DPF Reset Select "DPF Reset" with the hints displayed (See Figure 7): The DPF Reset option lets the PCM learn fluctuation and/or correction value of the exhaust gas pressure sensor. Note: Do not use this option unless instructed by the Workshop Manual.
2
Figure 7 Click "OK" with the hints displayed (See Figure 8): 1. Be sure to warm-up the engine adequately. 2. Apply Neutral/Park gear position. 3. Start engine and allow to idle.
Figure 8 Click "OK" with the hints displayed: Set ignition switch to OFF (Position Ⅰ) Click "OK" with the hints displayed: Set ignition switch to ON (Position Ⅱ) Click "OK" with the hints displayed (See Figure 9): This function will only operate if the following conditions are satisfied. Intake Air Temperature: 15-65 degree. Do you wish to continue?
3
Figure 9 If the intake air temperature is out of the range (15-65°C), the temperature value will be displayed on the screen after clicking "OK" (See Figure 10). The procedure succeeded if the intake air temperature was in the permissible range (See Figure 11).
Figure 10 Figure 11 Click "OK" with the hints displayed: Set ignition switch to OFF (Position Ⅰ) 2) DPF Assessment Select "DPF Assessment" with the hints displayed (See Figure 12): The DPF Assessment option checks the DPF for damage. Note: Do not use this option unless instructed by the Workshop
4
Manual.
Figure 12 Click "OK" with the hints displayed: Set ignition switch to OFF (Position Ⅰ) Click "OK" with the hints displayed (See Figure 13): Apply Neutral/Park gear position. Start engine and allow to idle.
Figure 13 Click "OK" with the hints displayed (See Figure 14): This function will only operate if the following conditions are satisfied. Engine coolant temperature: at least 70 °C. Do you wish to continue?
5
Figure 14 If the coolant temperature is below 70°C, the temperature value will be displayed on the screen after clicking "OK". The procedure succeeded if the coolant temperature was in the permissible range. Click "OK" with the hints displayed. Set ignition switch to OFF (Position Ⅰ) 3) DPF Regeneration Select "DPF Regeneration" with the hints displayed (See Figure 15): The DPF Regeneration option allows manual regeneration of the DPF. Note: Do not use this option unless instructed by the Workshop Manual.
Figure 15
6
Click "OK" with the hints displayed: Set ignition switch to OFF (Position Ⅰ) Click "OK" with the hints displayed (See Figure 16): While performing this procedure, please make sure the following conditions are satisfied. 1. Perform this procedure in a well ventilated area. 2. Do not place flammable objects near the vehicle. 3. Perform this procedure with the hood open. 4. Turn all electrical systems [A/C, Lights, etc.] off. 5. Do not turn the ignition switch off, depress the throttle or pedal, or shift gears while performing this procedure.
Figure 16 Click "OK" with the hints displayed: 1. Be sure to warm-up the engine adequately. 2. Apply Neutral/Park gear position. 3. Start engine and allow to idle. Click "OK" with the hints displayed: This function will only operate if the following conditions are satisfied. Engine coolant temperature: at least 70 °C. Do you wish to continue? If the coolant temperature is below 70°C, the temperature value will be displayed on the screen after clicking "OK". The procedure succeeded if the coolant temperature was in the permissible range. Click "OK" with the hints displayed: Set ignition switch to OFF (Position Ⅰ). The DPF regeneration is finished!
