A 9th level paladin activating his weapon's Divine Bond grants him +2 enhancement bonus to be used as he desired:
These bonuses can be added to the weapon, stacking with existing weapon bonuses to a maximum of +5, or they can be used to add any of the following weapon properties: axiomatic, brilliant energy, defending, disruption, flaming, flaming burst, holy, keen, merciful, and speed. Adding these properties consumes an amount of bonus equal to the property's cost
If I choose to add flaming burst, my weapon gets (emphasis mine):
A flaming burst weapon functions as a flaming weapon that also explodes with flame upon striking a successful critical hit. [...] In addition to the extra fire damage from the flaming ability [...], a flaming burst weapon deals an extra 1d10 points of fire damage on a successful critical hit. [...]
Even if the flaming ability is not active, the weapon still deals its extra fire damage on a successful critical hit.
The way I interpret this, is that when I activate Divine Bond and choose flaming burst, I immediately gain the benefit of flaming burst (extra damage on crits). But the flaming ability still needs to be activated in order to gain its benefit (extra damage on regular hits).
But that seems clunky to me. Can someone tell me whether I will need to spend another standard action after Divine Bond to activate the flaming weapon ability?