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31
5.4 DPF
The Diesel Particle Filter (DPF) function manages DPF regeneration, DPF
component replacement teach-in, and DPF teach-in after replacing the
engine control module (ECM).
The ECM monitors driving style and selects a suitable time to employ
regeneration. Vehicles driven a lot at idling speed and low load will attempt
to regenerate earlier than vehicles driven more with higher load and speed.
For regeneration to take place, a prolonged high exhaust temperature must
be obtained.
In the event of the car being driven in such ways that regeneration is not
possible, i.e., frequent short journeys, a diagnostic trouble code will
eventually be registered in addition to the DPF light and “Check Engine”
indicators displaying. A service regeneration can be requested in the
workshop using the diagnostic tool.
DPF regeneration is used to clear PM (Particulate Matter) from the DPF
filter through continuous combustion oxidation mode (such as high-
temperature heating combustion, fuel additive or catalyst to reduce PM
ignition combustion) to stabilize the filter performance.
DPF regeneration may be performed in the following cases:
⚫ The exhaust back pressure sensor is replaced.
⚫ The PM trap is removed or replaced.
⚫ The fuel additive nozzle is removed or replaced.
⚫ The catalytic oxidizer is removed or replaced.
⚫ The DPF regeneration MIL is on and maintenance is performed.
⚫ The DPF regeneration control module is replaced.
The operation guidelines of the DPF function are shown below:
1. Enter the DPF menu and choose relevant models according to the
vehicle being tested.
2. Enter the DPF regeneration menu.
3. Read carefully and complete the requisites listed before performing
the DPF regeneration function. And press OK after completing the
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