the key is in the SRS mode
jorel
it will show MAN TOGA/SRS/GA TRK.
anyway I don't understand what does accel alt has to do during approach
perhaps you should rephrase the question?
Eveveryone else:
The key, as someone said before, is in the SRS mode:
there are two different SRS modes (with different guidance). One for take off, and one for GA.
The modes are related to flight phase because of the speed targets. In take off, the speed target is V2 plus 10 or pitch 17,5º. in GA, the target is VAPP or actual speed upon mode activation, which ever is greater.
Only during take off phase the target speed is V2 related. As long as you are in take off phase, SRS will always be take off SRS with V2 as the reference. Once you change phase, however, speed target changes and go around SRS will activate when levers advanced (when conditions are met) and the reference will be VAPP (if in approach phase) or actual speed.