Ignition Key chip and transceiver ????????
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Ignition Key chip and transceiver ????????
The schematic shows the transceiver is energized both when the key is both in the start and run positions. I know it communicates with the chip to start your car, but does the transceiver and the chip constantly have to be communicating in order to keep the engine running? Or is it only for starting the vehicle? If it's just for starting the vehicle then I would think the transceiver would only need to be energized when the key is on the start position only and wouldn't be needed with the key in the run position. The reasoning is that my engine dies all of a sudden and what is very very odd is that the starter will not turn over or crank after the engine dies. then after a while the starter will work ok and get the engine running again. Is the transceiver faulty?
Freshman User
Joined: Dec 2012
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From: West Central Indiana
The schematic shows the transceiver is energized both when the key is both in the start and run positions. I know it communicates with the chip to start your car, but does the transceiver and the chip constantly have to be communicating in order to keep the engine running? Or is it only for starting the vehicle? If it's just for starting the vehicle then I would think the transceiver would only need to be energized when the key is on the start position only and wouldn't be needed with the key in the run position. The reasoning is that my engine dies all of a sudden and what is very very odd is that the starter will not turn over or crank after the engine dies. then after a while the starter will work ok and get the engine running again. Is the transceiver faulty?
Postmaster
Joined: Dec 2008
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From: Southern Oregon Coast
It sounds like something is overheating to me. I've had starters overheat and not turn over, and I've had ignition modules overheat and shut the engine down until the module cools back down. It may even be a PCM issue since these newer vehicles have become so damn dependent on that computer to run and operate... Are you getting a CEL or have you had it checked for any trouble codes?
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reply to nb-guy
thanks, I think that's the problem. pats. it's my wifes car and it quits randomly, works fine for a days then once in a while the engine dies and won't crank. She says the theft light is flashing when this happens. She's had the car towed home several times and when it gets home it cranks over and runs ok.
She towed it to a mechanic and he put new intake manifold gaskets in. then to another mechanic and he put a new fuel pump in but the problem remains after spending $$$$$ for nothing.
I changed the ignition electrical switch but the flashing theft light indicates that pats must be the problem.
Don't get a check engine light, no codes to pull. The owners manual states that pats can immobilize the engine. I didn't know that. I've been reading up on it and there's a lot to this. thanks again for the clues.
She towed it to a mechanic and he put new intake manifold gaskets in. then to another mechanic and he put a new fuel pump in but the problem remains after spending $$$$$ for nothing.
I changed the ignition electrical switch but the flashing theft light indicates that pats must be the problem.
Don't get a check engine light, no codes to pull. The owners manual states that pats can immobilize the engine. I didn't know that. I've been reading up on it and there's a lot to this. thanks again for the clues.
New User
Joined: Apr 2013
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i have had to replace the pats reciever around the ignition the odd time,i have also had the thin wires break at the connector especially on tilt steering,
just a couple of points i remembered
just a couple of points i remembered
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Is pats designed to shut down a running engine?
Never mind the question, I just found the answer on http://www.bsecorp.com/files/techtips/FORD%20PATS.pdf article says it is not a pats issue if:
Engine stalls on road: Once the engine runs for one second, PATS
CANNOT disable the engine. Running stalls are not PATS issues.
Engine stalls on road: Once the engine runs for one second, PATS
CANNOT disable the engine. Running stalls are not PATS issues.
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Never mind the question, I just found the answer on http://www.bsecorp.com/files/techtips/FORD%20PATS.pdf article says it is not a pats issue if:
Engine stalls on road: Once the engine runs for one second, PATS
CANNOT disable the engine. Running stalls are not PATS issues.
Engine stalls on road: Once the engine runs for one second, PATS
CANNOT disable the engine. Running stalls are not PATS issues.
I read that too but the fact that your Theft light flashes every time it dies make me think it is involved with the PATS. There is allegedly a way to count the flashes of Theft light in a two digit sequence to decipher what in the PATS is faulty . Searched but I can't find it but remember reading it in the past. HAs the plastic cover surrounding the ignition switch ever been broken due to accident or attempted theft? IF so the pickup coil could have been compromised.
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Posibilities ????
Under normal conditions pats will not shut an engine down but when things are going wrong, a short or as an example: like when your pc freezes up, it would open the door to the possibility that pats caused the engine to stall though it is not designed to do that.
never had the cover off the steering column until I replaced the electrical ignition switch the other day. they say if it ain't broke don't fix it. well it won't stay broke long enough to find a fix.
never had the cover off the steering column until I replaced the electrical ignition switch the other day. they say if it ain't broke don't fix it. well it won't stay broke long enough to find a fix.
Hotshot
Joined: Jan 2004
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From: St Louis
PATS will NOT cause an already running engine to stall. You'd be wasting time and money chasing that wild goose.
If you have a stall and the PATS light is subsequently flashing, it's almost always due to an intermittent interruption of operating power to the PCM during operation. The PCM doesn't reboot properly to reinitialize PATS so you end up with the flashing THEFT light
Usually, the culprit is a failing PCM Power Relay.
If you have a stall and the PATS light is subsequently flashing, it's almost always due to an intermittent interruption of operating power to the PCM during operation. The PCM doesn't reboot properly to reinitialize PATS so you end up with the flashing THEFT light
Usually, the culprit is a failing PCM Power Relay.
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Thought is was fixed but it failed again
Wouldn't crank again today, already replace the pcm and the ignition's electrical switch. Traced it to the transmission switch, the park/nuetral/drive/reverse switch. definitely the problem!!!!!! was not anti theft as first believed. had several months of aggravation, also had to get my wife a new car because of this.
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Mar 23, 2013 10:30 AM