MaxiDiag MD808 PRO Particle Filter Test

It is advisable to carry out a series of particle filter tests as a result of constant DPF regeneration, such as checking oil level, oil change interval for diesel contamination, swirl flaps, backpressure sensors and particle filter soot remains.
(1) Select Particle filter test and press the OK button from the service functions menu.
(2) The tool communicates with the vehicle and reads the fault codes memory. If there is no relevant fault code stored in DDE, the screen displays as below. Select Cancel to exit this function.

(3) If there are DPF-related codes stored in DDE, the screen displays as below. Select OK to continue or Cancel to exit this function.

(4) The Autel MaxiDiag MD808 PRO shows a list of particle filter tests as below. Select the corresponding number button to perform the desired test.

[1] Visual Inspection of Engine Oil
a) Select [1] and OK button from the particle filter test menu (Figure 5-32).

b) Select No if you visually find nothing is wrong with your engine oil. The tool displays as below. Press OK to return to the previous menu.

c) Or, select Yes if you visually find the engine oil level or oil change interval has some problems. The tool displays as below. Press OK button to return to previous menu.

d) Or, select Test Selection to return to the previous menu.
[2] Visual Inspection of Particulate Filter
a) Select [2] and OK button from the particle filter test menu.

b) Select Yes if you visually find no soot on the inside of the exhaust tail pipes. Press OK button to return to previous menu.
c) Or, select No if you visually find soot on the inside of the exhaust tail pipes. The tool displays as below. Follow the on-screen instructions to carry out particle filter visual inspections. Then select the correct options according to the test results.

d) Or, select Test Selection to return to the previous menu.
[3] Function Check of Swirl Flaps
a) Select [3] and OK button from the particle filter test menu.

b)Select OK to activate swirl flaps and the next screen displays. Press OK button to end the activation and exit.
c) Or, select Cancel to return to the previous menu.

[4] Exhaust Backpressure Test
a) Select [4] and OK button from the particle filter test menu.

b) Press OK to proceed and or select Cancel to return to the previous menu.

c) Check the exhaust backpressure with engine running idle. The Autel Scanner will read off the actual backpressure value and compare with the upper limit. Select OK to continue the test or Cancel to return to the previous menu.

If the engine is not running at idle speed, the tool will display a warning message. Select OK to repeat the test or select Cancel to exit.
Check the exhaust backpressure with engine running at 2000 rpm. The tool will read off the actual backpressure value and compare with the upper limit. Select OK to continue the test or Cancel to return to previous menu.

If the engine is not running at 2000 rpm, the tool will display a warning message. Select OK to repeat the test or select Cancel to exit.
Check the exhaust backpressure with engine running at cut-off speed. The tool will read off the actual backpressure value and compare with the upper limit. Select OK to end the test or Cancel to return to previous menu.
If the engine is not running at cut-off speed, the tool will display a warning message. Select OK to repeat the test.
The tool will submit a summary report for your confirmation.

g) Select Yes if the actual values exceed the limits. The tool displays an instruction message as below. Press OK button to return to previous menu.

h) Or, select No if the actual values are within the limits, then then tool will return to the previous menu.

i) Or, select Test Selection to return to the previous menu.

[5] Actual/Target Value Check-Mass Air Flow Sensor
a) Select [5] and OK button from the particle filter test menu.

b)Press OK to return to the previous screen

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