Express 2500 V8-6.6L DSL Turbo (2010)
Diesel Particle Filter (DPF): Service and Repair
Diesel Particulate Filter (DPF) Service Regeneration
VIN L
Diesel Particulate Filter (DPF) Service Regeneration
Circuit/System Description
A service regeneration of the diesel particulate filter (DPF) is required when the scan tool DPF Accumulation Status parameter displays 30 grams or
more of accumulated soot. Service regeneration is one of several output control functions available on the scan tool. When a service regeneration is
commanded, the engine control module (ECM) controls the 35 minute, approximately, service regeneration as follows:
1. The exhaust system is warmed up for about 8 minutes. Engine speed is slowly increased to 1,600 RPM, then to 2,200 RPM and finally to 2,500
RPM.
2. Once the DPF reaches its calibrated regeneration temperature, the ECM maintains engine speed between 2,200-2,500 RPM for about 20 minutes
until regeneration is complete, is cancelled by the technician, or is aborted due to abnormal conditions.
3. The ECM then slowly decreases engine speed to 1400 RPM, then to 800 RPM, and finally to normal idle speed over a 5 minute period. This is
done to allow the DPF to cool down.
The DPF Service Regeneration will be terminated if any of the following conditions occur:
*
The brake pedal is applied
*
The accelerator pedal is applied
*
The transmission is shifted to Drive or Reverse
*
The DPF Service Regeneration is commanded OFF using the scan tool
*
The scan tool is disconnected from the vehicle
*
The DPF, ECT or EGT temperatures exceed calibrated thresholds.
Conditions for Running
The following conditions must be met in order to enable DPF Service Regeneration:
*
DTCs P2463 is the only active DTC.
*
The battery voltage is greater than 10 V.
*
The engine speed is between 500-2,700 RPM.
*
The exhaust gas temperature (EGT) sensors 1 is between 20-500°C (68-932°F).
*
The exhaust gas temperature (EGT) sensors 3 is between 20-735°C (68-1,355°F).
*
The engine coolant temperature (ECT) sensor is greater than 70°C (158°F).
*
The fuel temperature is less than 150°C (302°F).
*
The BARO pressure is greater than 40 kPa (5.8 psi)
*
The APP sensor is less than 1 percent.
*
The diesel exhaust fluid temperature is greater than -30°C ( -22°F).
*
The brake pedal and accelerator pedal are in the released position.
*
The transmission is in Park or Neutral.
Diagnostic Aids
The scan tool DPF Regeneration Inhibit reason parameter will display a reason for not enabling or aborting the DPF service regeneration. Refer to the
reasons that are displayed and the corrective action for each reason.
