Question about Cars & Trucks
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Posted on Jan 02, 2017
PATS - Passive AntiTheft System.
- This is the large head on the key to the truck programmed.
HEC - Hybird Electronic Cluster ( I think that is the correct words ).
This is where the RFIDs ( see below ) for the keys programmed to the truck are stored in the cluster.
RFID - Radio Frequency IDentification
The key head has a serial number that is stored in it. and similar to the white tags on CDs and expensive items in stores, an antenna "paints" ( produces a signal field ) the RFID tag in the key to enable it to be read. This is how the key ( or those white tags in the store ) do not need a battery in them to transmit the information.
Sorry I screwed you up in the other problem by getting acronym happy without defining them.
The PATS antenna is around the ign key cylinder. To remove the cover 3 of the holes have phillips head screws in them. The 4th hole, use a punch or drift to press the button AFTER turning the key to the run position.
The PATS antenna is around the ignition key cylinder
This is all I could come to with the issue of the RMST work start the truck, but if you used the 2 keys for the truck, the theft light would not go out.
Once you get to this point, you might not notice anything obviously wrong, which I can only suggest repalcing the PATS transponder loop antenna. I know Remove & Replace is a bad diagnoses step, the only other route is having a dealer, high end mechanic or locksmith try to reprogram the keys again. The dealer / mechanic might have luck with getting the reprogrammed, else they are going to go the same route.
I do not see where this can be, there can be 8 PAS keys programmed ( unless it is a fleet vehicle, which a setting can be set to 2 keys only, but the PATS bypass for the RMST would not have been added if this was the case ).
Posted on Nov 23, 2010
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