The DPF function of Autel MaxiDiag MD808 PRO allows you to carry out numerous functions on the Diesel Particulate Filter system without having to send your car to a main dealer. The tool will manage DPF regeneration, DPF component replacement teach-in and DPF teach-in after replacing the engine control unit.
ECM monitors driving style and selects a suitable time to employ regeneration. Cars driven a lot at idling speed and low load will attempt to regenerate earlier than cars driven more with high load and high speed. In order for regeneration to take place, a prolonged high exhaust temperature must be obtained.
In the event of the car being driving in such a way that regeneration is not possible, i.e. frequent short journeys, a diagnostic trouble code will eventually be registered, DPF light and “Check Engine” indicator come on. A service regeneration can be requested in the workshop, using the diagnostic tool.
Before carrying out a forced DPF regeneration using the tool, check the followina items:
1.The fuel light is not on
2.No DPF relevant faults stored in system.
3.The vehicle has the correct spec engine oil.
4.The oil for diesel is not contaminated.
IMPORTANT:
Before diagnosing a problem vehicle and attempting to perform an emergency regeneration, it is important to obtain a full diagnostic log and read out relevant measured value blocks.
NOTE:
1.The DPF will not regenerate if the engine management light is on, or there is a faulty EGR valve.
2.The ECU must be re-adapted when replacing the DPF and when topping up the fuel additive Eolys.
3.If the vehicle needs to be driven in order to perform a DPF service, ALWAYS have a second person help you. One person should drive the vehicle while the other person observes the screen on the Professional diagnostic technician. Trying to drive and observe the Scan Tool at the same time is dangerous, and could cause a serious traffic accident.
Take BMW as an example. Follow the steps below to do the tests.
Select DPF icon on the Service screen (Figure 5-1), choose BMW from the vehicle make screen and select the correct vehicle model to enter the function menu.
DPF Diagnostics
Select Control Unites from the DPF functions screen to access the Function Menu.
Identification A
This function enables you to retrieve the DPF-related control information.
Press Saveto save the information for later review or press ESCto return to the previous menu.
Starting Basic Inspection Quantity
This function enables you to start fuel delivery matching.
(1)Select Starting Basic Inspection Quantity from the Youobd2.com functions menu (Figure 5-20) and press OK.
(2)The tool communicates with the vehicle and reads the fault codes memory. Follow the on-screen instructions to finish this procedure.
(3)The tool will display a function list menu as below. Press the corresponding number button to perform the desired function.
[1] Enter New Value for Adjustment
From the Starting Basic Inspection Quantity menu (Figure 5-21), select [1] and press OK. The screen displays as below.
The three keys at the bottom of the screen work as below
[Finish]: After entering the value, use this key to save the value to the tool.
[Show]: Press this key to pop up a soft keyboard to facilitate your input.
[Esc]: Press this key to exit.
The three keys at the bottom of the screen work as below:
[Finish]: When you finished the input, select this key to confirm your input. [Pre.]: Uses this button to move a space to the left.
[Backspace]: Uses this key to erase the previous digit or character when typing.
Press Yes to save the data and continue.
NOTE:
The data you input should be in the reasonable range. If the input data is out of range, the tool will display a warning message “Permissible adjustment range exceeded.”
[2]Reset Adjustment to 0
Once the [2] is pressed, the tool will automatically reset the value to zero.
[3]/[4] Store Data and Exit
When the fuel delivery rate adjustment is completed, select [3] and OK to store the new value in the control units; or, select [4] and OK to retain the old value.
Injection Rate
This function is used to adjust the injection volume.
(1)Select Injection Rate from the service functions menu (Figure 5-20) and press OK.
(2)The tool communicates with the vehicle and reads the fault codes memory. Follow the on-screen instructions to finish this procedure.
(3)Then the tool will display as below. Press the corresponding number button to perform the desired function.
NOTE:
The data you input should be in the reasonable range. If the input data is out of range, the tool will display a warning message “Permissible adjustment range exceeded.”
[2]Reset Adjustment to 100%
Once the [2] is pressed, the tool will automatically reset the value to 100%.
[3]/[4] Store Data and Exit
When the injection volume adjustment is completed, select [3] and OK to store the new value in the control units; or, select [4] and OK to retain the old value. http://www.youobd2.com/goods-5085-Autel+MaxiDiag+MD808+PRO+Diagnostic+Tool+Full+Systems.html
