That's not a function of the Service Bay Test. The conditions required to run the test from cold start, then the idle portion followed by the drive portion facilitate the other monitors by happenstance.
We're also told (and forced) to clear codes to initiate this bi-directional command. If there were other codes, or incomplete monitors (such as O2 codes), we usually concentrate on fixing those other issues before we address the EVAP system as we look upon them as more significant.
This means the other monitors and systems are likely closer to optimum so they complete easily.
I've seen what you have seen but I've also seen many times other monitors are still incomplete. As I said, it's not a function of the SBT.
We're also told (and forced) to clear codes to initiate this bi-directional command. If there were other codes, or incomplete monitors (such as O2 codes), we usually concentrate on fixing those other issues before we address the EVAP system as we look upon them as more significant.
This means the other monitors and systems are likely closer to optimum so they complete easily.
I've seen what you have seen but I've also seen many times other monitors are still incomplete. As I said, it's not a function of the SBT.
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