Question about 2001 Ford Mustang

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2001 mustang 3.8 no spark. an no power to crank sensor, is there a fuse for the crank sersor?

Posted by Anonymous on

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  • Anonymous Jan 06, 2011

    yes theft light is flashing. took car to a garage and he can not retrieve diagnostic codes not one. all fuses are ok . is this a bad pcm?

  • Anonymous Jan 07, 2011

    george thanks for your last reply, the mustang was broken in. they drove a screwdriver into the door lock and forced it open.RIPPED out the kenwood cd-receiver,puling wires an switches out of the center of dash. I have replaced the door lock

  • Anonymous Jan 07, 2011

    sorry got lost or something! the 2001 mustang, someone broke into the left door my driving a big screwdriver into the lock and forcing it open. Ripped out the center dash radio/cd receiver and three switchs also. I have replaced the door lock and the actuator, had the new door lock coded to the ignition key. Have not replaced the three switches or the radio. the theft light is still flashing. Car was drove for 2 weeks or so after this happen. the next morning it would not start and theft light started flashing



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No there is not a fuse to the crank sensor, and if you were checking for voltage at the crank sensor ,you should see more than 1 volt but less than two volts at the crank sensor positive circuit which is the Dark blue wire, the crank sensor is a hall effect type sensor which generates its own voltage, It would be very helpful to know how this no start problem came about ! was any work recently been perform on your car ? it is also possible that you have a theft type problem with your car, which if for any reason your car"s theft system thinks its possibly being stolen, (example does not like the key or the electronic chip in the key is defective) may put it into to a theft lock down, ford uses different methods to keep the car from been stolen,some are disable the starter (example no crank) another is to disable to fuel pump circuit, or disable the spark,the easiest way to make sure this is not whats the problem, is to monitor your theft light, (located either in the gauge cluster or on top of the dash,) you have a red light or a red key that flashes or possible or just says theft, if the system is working correct when you first turn the key to the run position the light ,key or the theft light will flash three times and then go out and say out if it continues to flash you have a theft problem.there are many other possible reasons why you could have no spark such as broken wires ,wires rubbed bare and grounding out to engine ect, I could help you further but would need more information to help you further ,hopefully this will get you headed in the right direction

Posted on Dec 29, 2010

Testimonial: "great info!!! thanks"

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  • Anonymous Jan 06, 2011

    yes theft light is flashing, took car to a garage he can not get any codes out of the pcm. all fuses are ok. is this a bad pcm?

  • george_1256 Jan 06, 2011

    No I would not want to condemn the Pcm at this point. At this point I need some input from you to properly help you,First has any repairs been recently been done to your car prior to having this no start problem ? Is there any after market electronic devices been added to your car ? ( these are a common cause of electrical interference to the theft system) I want to clarify to you If you turn your key to the run position and it continually is flashing or on solid THIS IS were your no start problem is and if your car was at my shop and I was working on it, this is the system that I would be inspecting very closely to Isolate the the cause . Was you car being driven and then shut off and fail to start the next time ? or was it being driven and stall while being driven ? Please respond and we will continue from there .Thanks

  • george_1256 Jan 07, 2011

    Do I understand then the switch fixed your car or do you need more help ?? Please let me know

  • george_1256 Jan 08, 2011

    Ok thanks for getting back with me ! Do to the fact we still have the flashing theft light , like I said before that is why your car won't start and that's what we need to address to get your car to start. With that said I want to explain a little more in depth how your theft system works to give you a better understanding why you need to inspect certain things to locate why the theft system is flashing.I also want to let you know that I have seen things not even directly related to the theft system that will make the theft light .Your theft system on your ford is referred to by ford motor co and the PATS system (passive anti theft ) so as I make reference to the pats you"ll know what I am talking about. Ok with that said your car used a type of radio frequency Identification between the key and the transceiver module,This radio frequency is why I ask before if your car had any after market electronic equipment ,due to the fact that things such as large stereo amp can cause electrical interference with the radio signals to the pats system if for instance the power wires to the amp are not properly shielded. Now due to the fact the car has recently been broken into and did not seem to have any problems before I want to explain a few things . As I said before the theft module that actually is the main brain of the theft system is the instrument cluster (The part with the speedometer and gauges ) and the theft modules main input is the transceiver module with is located under the plastic shrouds on steering column . Your transceiver module receives its signal from your key which has a Transponder inside of it . This key to the Transceiver communication is done by radio frequency and each key MUST be programed to the theft module before it will start the vehicle (and this takes specials scanner tools capable of obtaining security access to program the keys to the theft module or if you already have two programmed keys you can program a third and fourth key by first installing both of the already programmed keys into the ignition switch then turning to the run position then installing any not programmed keys,) so with that said if you have used any none programmed key into the ignition switch you can make your car go into this theft mode but should come out of the theft mode if a programmed key is installed into the ignition . sorry if it sounds like I am rambling but I feel Its very important I make this clear so as not to find we have over looked something very simple ! Ok I have explain how each key is equipped with a transponder and that the communication between the key to the transceiver module is obtain through radio frequency, the signal from the key transceiver is then sent to the Instrument cluster(Theft module) through wires so it is possible the wiring around the area of the dash were the radio and switches were torn out mite have gotten damaged and breaking the communication between the key transceiver module and the Instrument cluster(theft module) which is something you should inspect closely and if in doubt repair bad wires. So if the key your using is a known good undamaged programed key the signal from the key is then sent to the transceiver module ,from the transceiver module the signal is then sent to the instrument cluster and if the key is programmed to the theft module (Cluster) and the theft module likes( Approves) of the key An enable signal is then sent from the theft module to the Power train control module (PCM) to allow the vehicle to start (ALLOW SPARK) If for ANY reason the theft module does not like (DISAPPROVE ) of the key code sent from the key to the theft module it will not send a enable signal but instead a disable signal to the pcm to start I would recommend closely the wiring around and running down the steering column and the wiring around were the stereo and switches were torn out for damage and repair as necessary Please look this over closely ,if possible it would be nice if the shop you had check for pcm codes could check the instrument cluster module for codes Please check the things you can and get back to me with details of your findings as this will really help with finding the problem and getting your car started. If you inspect it closely and don't find anything ,I have another Idea of a strong possibility of what else might be going on by I don't want to fill your head with to much at a time so let me know your results of your inspections and will pick up from there Thanks



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