I'm playing around with a VR SS ready to pull the engine to use in another vehicle. I've set up VATS as follows:
The 'problem' is the car starts and runs fine with the original key but if we place tape over the keyfob's contact, it fails to start. I would have expected with VATS disabled and the tape, it would work as it would with the BCM removed and start/run?
Am I missing something here? Does the BCM send out a code or something that over-rides the disabled VATS?
Last edited by hoopstar on Fri Dec 02, 2016 9:52 am, edited 1 time in total.
The BCM controls the starter relay, the BCM won't fire the relay until it sees the matched key signal. The start signal to the starter relay would need bypassing to make it start.
VATS off only tells the PCM to ignore the 'ok to go' signal from the BCM.
Dylan wrote:If younreadback the burnt memcal whats it show once that's loaded up?
Is that 11P?
Yup, 11P - Reading it back shows it's programmed OK.
Biggvl wrote:The BCM controls the starter relay, the BCM won't fire the relay until it sees the matched key signal. The start signal to the starter relay would need bypassing to make it start.
VATS off only tells the PCM to ignore the 'ok to go' signal from the BCM.
Well that's the answer then. Thank you very much for the info Biggvl..!!
vats off only tells the PCM to allow firing the injectors without waiting for the BCM security signal. As above if you wanted a push button type start then you'd need to bypass the the BCM starter motor circuit and wire in your own.
to test it bypass the starter relay, make up a jumper wire to go from the ignition feed straight to the starter solenoid wire that will tell you if its working or not ....
No matter what the question is, the answer is always more horsepower!
