Corsa 2 computer

The doubt is created because another mechanic tells me that the computer does not fail.

Make a scanner, if there are problems from ECU, the scanner will give you the
successful

The Corsa computer controls the signal of the injectors with 2 pins, when it fails, 2 injectors should fail, most of the time the failure is in the wiring and not on the computer, the recommended procedure would be to measure the continuity between the pin of the connector to the computers and the connectors of the injectors, to find accessories.

Like any computer you can partially fail depending on the tracks that are lifted or fail.