D439E Service Manual 4. Fuel system
177
Removal
1. After the engine stops wait for about 30 seconds.
2. Disconnect the battery ground line.
3. Remove ECU connector wiring sequentially.
4. Loosen ECU bracket fixing bolt and remove ECU.
CAUTION
When replacing ECU with new one, ECU data
corresponding to the vehicle should be
reprogrammed and injector QR code value
should be inputted according to the process of
the diagnosis. Otherwise, engine performance
could be deteriorated and there may have
problems in the emission gas.
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