Diesel Particulate Filter (DPF) Switching in EDC17 ecu.
Before switching off the DPF function in your ECU you must decide what to do about the hardware fitted to the car. The hardware is the DPF/Catalyst and the wiring/sensors.
Options.
1. Original look. Remove DPF/catalyst. Open case and empty the inside. Refit. Leave all original sensors and wiring in place. In some countries this may be the only option allowed.
2. New pipe. Remove DPF/catalyst and replace with a pipe.
2a. Keep sensors and wiring
2b. Remove sensors and wiring.*
*If you remove sensors and wiring you may get fault codes and even a dashboard warning. These will need coding out of the ECU file.
Don’t rip out the DPF yet. Some ECU files get very upset if you try a DPF file delete solution when the DPF is already reporting full and failed regeneration. It is advisable to always do a forced regeneration first before touching the DPF or the ECU file.
What if forced regeneration doesn’t work?
You may have to remove the DPF and soak it in something like alloy wheel cleaner for a day or so. Flush out with hot water if possible. Refit and try the forced regeneration again.
DO NOT INSTALL A DPF OFF FILE BEFORE THE HARDWARE HAS BEEN SORTED
With the hardware sorted you are ready to modify the ECU file.
As usual the information here is based on using Winols to examine and modify your file.
The file below has been opened in 16 bit, decimal (255), LoHi view.
1. Set the view to text.
2. Open ‘Search’ and then search for decimal byte sequence (decimal tab)
3. Enter 4081, 00015 Click right arrow button or Enter button.
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