Comment Re:The service manual (Score 1) 750
Thanks for the info on VSRM- I wasn't familiar with that acronym, and a google search on it was unenlightening w.r.t. automobile manuals.
I would still ask Zurk where he stops quoting the manual, and starts providing information/opinion not in the manual. I suspect that the last 2 paragraphs:
An internal short could occur within one or more of the paths from the circuits leading to the ecm. That could lead to a situation where the computer cannot detect its own failure.Therefore, when the system gets conflicting information, it arbitrarily ignores half the conflicting information. It does not know which of the circuits are lying or if they both are lying and shorted together. different resistance values will lead to arbitrary acceleration. Having the brake override it is a stopgap, but ixing the real problem (perhaps with a third circuit in voting mode which will require replacing the entire circuit path) is the REAL FIX. I suspect 2012 and onwards toyotas would have a third path and faraday cage/denso replacement for the magnet assembly in the plastic accelerator pedal (which is another problem with EMI which might lead to acceleration) which i am not going to go into here.
So, YES OP you should definitely install the update. Its the only thing standing between you and death if both the APP circuits short
.
are not in the manual.
It's OK if the information is a reasoned guess, speculation, or something he's tested personally or just a WAG. I would like to know how he came by it, so I can judge it's usefulness. Even if it's speculation or a WAG, it's a decent theory that can be easily tested. OK, maybe not safely tested, but testable at least.