blown99 Posted April 26, 2012 Share Posted April 26, 2012 Need some info on a PATS system in a 96 Cobra. I will be installing a 96 GT ECM (bbs4/cdan4) into this cobra chassis along with the correct engine and automatic transmission harness from the GT. Does the PATS system recognize the ecm or does it recognize the dash cluster? The keys on the 96's have chips in them or does the key fob disarm and arm the theft system? Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted April 26, 2012 Share Posted April 26, 2012 Ooops! I had stuff posted from the wrong model year... thanx Jim. Musta been half asleep last night. Quote Link to comment Share on other sites More sharing options...
Jim Warman Posted April 26, 2012 Share Posted April 26, 2012 Pssst.... he said '96. Mark, the 96 WSMs are no longer online and I don't have a copy here at home. I'll try to remember to look through the WSM tomorrow. Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted April 26, 2012 Share Posted April 26, 2012 1996 Mustang Workshop Manual DESCRIPTION AND OPERATION Procedure revision date: 05/18/2000 -------------------------------------------------------------------------------- Anti-Theft System, Passive The passive anti-theft vehicle protection system is a passive system that uses radio frequency identification technology to deter a driveaway theft. Passive means that it does not require any activity from the user. During each vehicle start sequence, the encoded ignition key is interrogated by the vehicle protection anti-theft electronics. If the key's ID code has been programmed into the system, the vehicle is capable of running. If the key's ID code is not programmed into the system, or if no encoded key is detected, then the vehicle is disabled from running. The passive vehicle protection system communicates the state of the security system to the powertrain control module (PCM) (12A650) via the multiplex communications network (MCN) communication link. The PCM, based on the messages from the passive vehicle protection system, will determine if the vehicle's engine will be enabled to start. The passive vehicle protection system differs from the anti-theft alarm system in that the passive vehicle protection system enables/disables the vehicle from starting and only operates with the ignition switch in RUN/START position. The anti-theft alarm system has perimeter protection capabilities and operates only with the ignition switch OFF. Refer to Section 13-11A for anti-theft alarm system Components The vehicle protection system contains the following components: passive anti-theft system module THEFT indicator transceiver electronics powertrain control module (PCM) (12A650) encoded ignition key RH drive anti-theft alarm control mounting bracket (19A435) LH drive anti-theft alarm control mounting bracket multiplex communications network data link connector The passive vehicle protection system components function as follows: Theft Indicator The passive anti-theft vehicle protection system utilizes the same anti-theft indicator, located in the instrument cluster (10849) that the anti-theft alarm system (if equipped) uses. (Refer to Section 13-11A.) The indicator provides system proveout and operating status to the customer or service technician. The anti-theft alarm system uses the theft indicator when the ignition switch is turned OFF. The passive anti-theft vehicle protection system uses the theft indicator when the ignition switch is turned to RUN/START position. The passive vehicle protection system will activate the indicator signal as described under the following conditions when the ignition switch is turned to RUN/START position: THEFT Indicator ON two seconds, then OFF Key Code Received/Vehicle Enabled (Programmed key) THEFT Indicator ON two seconds, then OFF one second, then ON continuously Key Code Received/Vehicle Disabled (Assembly plant use only, less than two keys programmed) THEFT Indicator ON two seconds, then flash for one minute, then flash diagnostic trouble code 16 ten times Key Code Received/Vehicle Enabled or Disabled (No PCM Verification) If vehicle starts, powertrain control module is not working with control module If vehicle does not start, Multiplex Communications Network may need service You will need to go to the Symptom Chart in this Section for diagnostic assistance to isolate any communication system. THEFT Indicator flashes for one minute No Key Code Received (Key damaged, Non-encoded key, Wiring or Transceiver concern) THEFT Indicator flashes for 15 minutes Key Code Received/Vehicle Disabled (Key not programmed). Refer to Key Initialization Procedure in Service Procedures. Encoded Ignition Key When the vehicle ignition switch is placed into either RUN or START, the control module initiates a key interrogation sequence. The control module starts an interrogation period by supplying both power and the carrier signal to the transceiver to energize the ignition key. After the energize period has expired, the key transmits its ID code to the transceiver module. This ignition key is much larger in size due to the electronics that are located in the head of the ignition key. Transceiver The transceiver module is used to interface the control module to the encoded ignition key. The transceiver sends a signal to power up the encoded key and receives the ignition key data signal and sends it to the control module. Passive Anti-Theft System Module The control module contains circuitry to interface to the vehicle electrical system, the transceiver module, the vehicle multiplex communications network and the vehicle theft indicator located in the instrument cluster. The control module uses a microprocessor to control the system functions. The control module microprocessor stores the ignition key codes in non-volatile memory. The control module can be diagnosed through the data link connector. Powertrain Control Module (PCM) The passive vehicle protection system utilizes the engine management capabilities of the powertrain control module to enable or disable the vehicle engine. The multiplex communications network is used to send and receive messages to and from the powertrain control module. At each engine start sequence, the powertrain control module allows fuel and spark until the engine is running. Within one second after engine start, the powertrain control module must receive an enable signal or the engine is disabled before the vehicle can be moved. Quote Link to comment Share on other sites More sharing options...
blown99 Posted April 27, 2012 Author Share Posted April 27, 2012 So as long as the PCM receives the signal from the PATS transponder (located in the trunk)then the ecm will allow the engine to run. It sounds like as long as I use the PATS transponder, matching key and key fob with matching cluster, then the ecm will receive a its ok signal from the PATS module and allow the engine to run. Thanks very much for the info. Quote Link to comment Share on other sites More sharing options...
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