Quote:
Originally Posted by ATL BRZ
Specifically the countermeasure. The FR-S owners who have had the chirp come back after the TSB was performed likely had techs that had no idea they needed to control the orientation of the plunger when reassembling everything to make sure the chirp goes away for good; again because the Scion TSB basically just says, "replace the fuel pump and rail assembly", and that's it.
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Again, the change is done at the factory. Note the words "production change" and "during assembly" i.e. when they make the pump at the factory. The dealer is simply replacing the entire thing which already has the fix done. The rest of the info is inconsequential to the dealer tech.