Originally Posted by
meggers
I tried to sync my fob by what i saw here put key in ignition press button 2x turn key on wait a min the try and start. No go only starts after battery disconnect re connect. So obviously the key isnt communicating are antenna ring, not sending to skreem are skreem not sending yo ecu. Im looking for some clues to narrow it down to a more failed componet . Thank you for responding
WRong. The sync (or "Programming procedure") is as follows:
The Remote Keyless Entry Transmitter(s) can be programmed by thecustomer without special tools.
PROGRAMMING PROCEDURE
Transmitter programming by the customer is done by performing the following steps:
1. Insert the key into the ignition switch.
2. Press either the lock or unlock button momentarily twice.
3. Turn the key in the ignition switch to the ON/RUN position within 30 seconds.
This programs the LOCK/UNLOCK/PANIC buttons to the car; the buttons' functions are powered by the batteries in the key FOB. This has NOTHING to do with starting the engine.
Starting the engine is a function of the RFID chip in the key. When you turn the key to 'on', the SKREEM powers up the ring around the key, this energizes the RFID chip in the key, the chip sends a signal to the ring, which is transported over the wires to the SKREEM. If the code in the chip is what the SKREEM wants, it allows the ECM to start the car. This engine start function cannot be programmed by the customer.
You are right in that a failed ring will cause a no-start condition, but I've found ring failures to be very rare. The experts tell us that the SKREEMS fail due to a software failure in the SKREEM itself. This is repairable by some aftermarket vendors, but not Chrysler dealers.