Doosan D35S-5 Service Manual page 204

7. The ignition key should be turned off more than
10sec. later after [pump learning initialization] is
completed.
8. Start the engine and let the vehicle for 10 minutes
at idle.
NOTE : Above mentioned [pump learning
initialization] actuator test should be performed
when the pump is replaced with new one.
CAUTION
If the above mentioned [pump learning
initialization] is not performed with diagnosis
equipment after replacing new pump, the engine
performance could be deteriorated and there
may have problems in the emission gas.
D439E Service Manual 202 4. Fuel system