D439E Service Manual 4. Fuel system
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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.