Tech Question for Poyzinous.

[oldandslow]

Im interested in removing the safety feature that requires us to step on the brake pedal to start the car.Is it a contact switch? If it is simply a contact switch,I would like to replace it with a hidden switch that would double as a security device.Hopefully it's not something wired into the computer.Wadayah think Poysy

[Poyzinous]

its actually integrated with the brake lamp switch. so to bypass it the brake lights would stay on indefinitely. Not a good idea. You won the caption contest by the way

[SteveTheTech]

To ellaborate on that a bit.

The brake lamp switch signal is key signal to the BCM as well as the ECM as well as transmission, cruise, and audio system. The basic operation of the NATS (security) system requires the operation of the brake pedal before the computer will even send the start signal. At the level at which this input is required it would really not be advisable to defeat this option.

I too thought the time required to start the car was a bit excessive at first but after getting in and out of hundreds of 06+ models I have realized the time requirement for pushing the button and holding the pedal are not that long. I put my foot on the brake hit the button once the procedure starts to change you don't need to hold the brake or button anymore.

Given the amount of things that have to happen from the time you hit the start button to the time it changes to ACC mode. The ikey transmitters ping the signal in the key and verify the rfid serial number, the start button, brake and transmission position switch signals are all verified.

As a quick test, try timing it out to figure out just how much time is required to hit and hold the required things to start the car. I've thought about this in the past and it doesn't work out when you think about the work vs. reward then factor the potential side effects. The NATS system does not tolerate fluctuations in any signal input, this is the advanced security feature and has been standard on all Infinitis since 98 and has gone through 5 dramatic changes to an advanced rfid verification process that has an impressive detection range that has been limited to personal protection.

[audtatious]

Maybe you should detail this in the mod database so people would be able to find it later.....and add it to the FAQ?

Great info

[Poyzinous]

Yeah thanks steve. I didn't want to get into Nats and the BCM/ECM integration. You said all infinitis, but correct me if I'm wrong, It started on the FGY33 Q45, then the 99 I30, before it became standard in 2000 right? At least the first Nats 2.0 anyway. Which at the time was an awesome theft deterrent system. The current G still uses the BCM type nats system from 03 I think. But what if you had a set brake signal into the BCM? then theoretically if the key id is good the can communication between the bcm and the ecm and ipdm will still be normal won't it? Or is the brake signal integrated with the lights as well...? Since they run parallel it would kill the cruise control, since they run together.
Modified by Poyzinous at 9:10 AM 9/4/2009

[oldandslow]

Thanks Poyzinous and Steve!I will leave it alone.

And thanks for the contest Poyzy! Ive been a winner ever since I found this Forum