KOBDR04AAutomotive Immobilizer Module

Re: Certification for Lear HB, LX Immibilizer with RKE RX Model: Skreem HB, LX FCC ID: KOBDR04A IC: 3521A-R04B USER'S MANUAL INFORMATION (PRELIMINARY) The User's Manual is in preparation. The following material will be contained in the manual: FCC ID: KOBDR04A IC: 3521A-R04B This device complies with Part 15 of the FCC Rules and with RSS-210 of Industry Canada. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation. WARNING: Changes or modifications not expressively approved by the party responsible for compliance could void the user's authority to operate the equipment. The term “IC:” before the radio certification number only signifies that Industry Canada technical specifications were met.

March 15, 2003 Federal Communications Commission Equipment Approval Services P.O. Box 358315 Pittsburgh, PA 15251-5315 Re: Certification for Lear HB, LX Immibilizer with RKE RX Model: Skreem HB, LX FCC ID: KOBDR04A IC: 3521A-R04B Please find enclosed application materials for certification of Lear Corporation Skreem HB, LX RX/Imm.. We tested it and found it to comply with FCC Part 15. If there are any questions regarding the application or testing performed, please contact me at the above address or call 734-483-4211, fax 734-647-2106, or e-mail [email protected]. Sincerely, Valdis V. Liepa Research Scientist March 15, 2003 Certification and Engineering Bureau Industry Canada 3701 Carling Avenue, Bldg. 94 Ottawa, Ontario K2H 8S2 Re: Certification for Lear HB, LX Immibilizer with RKE RX Model: 56038675AH, 5603865AG FCC ID: KOBDR04A IC: 3521A-R04B Please find enclosed application materials for certification of Lear Corporation Skreem HB, LX RX/Imm.. We tested the device and found it to comply with RSS-210. The product is identified by: IC: 3521A-R04B If there are any questions, suggestions, etc., regarding the application or testing performed, please contact me at the above address or call 734-483-4211, fax 734-647- 2106; e-mail: [email protected]. Sincerely, Valdis V. Liepa Research Scientist

5200 Auto Club Dr. Dearborn, Michigan 48126-9982 (313) 593-9000 Re: Certification for Lear Corporation Transmitter, Model FCC ID: KOBDR04A IC: 3521A-R04B FCC and IC ID LABEL and STATEMENT The following drawings outline the 2 different cosmetic versions of this receiver with Immobilizer. The internal PCB is the same between all versions, however with different component population variation between Immobilizer and non- Immobilizer. The label(s) below will be laser etched on the outside and on the back of the plastic case of the transmitter. The following statement will be printed in the User’s Instruction Manual This device complies with Part 15 of the FCC Rules and with RSS-210 of the Industry Canada. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation. WARNING: Changes or modifications not expressively approved by the party responsible for compliance could void the user’s authority to operate the equipment. 5200 Auto Club Dr. Dearborn, Michigan 48126-9982 (313) 593-9000 Re: Certification for Lear Corporation Transmitter, Model FCC ID: KOBDR04A IC: 3521A-R04B 5200 Auto Club Dr. Dearborn, Michigan 48126-9982 (313) 593-9000 Re: Certification for Lear Corporation Transmitter, Model FCC ID: KOBDR04A IC: 3521A-R04B

5200 Auto Club Dr. Dearborn, Michigan 48126-9982 (313) 593-9000 Re: Certification for Lear Corporation Receiver, Model SKREEM FCC ID: KOBDR04A, KOBDR04B IC: 3521A-R04B, 3521A-R04C DESCRIPTION OF OPERATION GENERAL DESCRIPTION The product for which certification is pursued will be manufactured for DaimlerChrysler Motor Company by Lear Corporation for automotive applications. The module is intended to perform two functions: Vehicle immobilization and RKE (Remote Keyless Entry). There is a version that will not have the LF circuit populated and thus will be an RKE only module. The receiver section of the design is identical between the two different versions. The receiver is to be mounted in the vehicle and will work in conjunction with the 315 MHz handheld transmitter. The receiver base-station is part of a keyless entry system that can be used to perform certain functions such as lock and unlock of the driver and passenger doors, open the trunk, etc... depending on how the receiver module is programmed. There are different housings this receiver module will be mounted in and will have a DaimlerChrysler/Lear part number stamped on the back of the housing. The PCB, microprocessor and RF circuitry on all versions are identical. TECHNICAL DESCRIPTION When the buttons on the handheld transmitter is depressed, a RF modulated signal is generated that will only be recognized by a matched receiver matching the correct data protocol. The code is carried by 315 MHz carrier with AM OOK (on-off keying) modulation and demodulated by the receiver basestation. The data code is of a Manchester modulation format to express bits “0” and “1”. RF detection is accomplished with an off-board wire antenna internal to the receiver base-station. The receiver is of a super-heterodyne, single conversion, narrow band architecture that demodulates the RF transmission present on the off-board antenna. Demodulated data is then made available to the system microprocessor that decodes the transmitted message and performs the desired function. The local oscillator is a PLL crystal-based system with a frequency tolerance of ± 16kHz. The immobilization feature is based upon 125 kHz RFID technology. This feature is intended to ensure that the proper key is used to operate the vehicle. The encoder for the RKE function also contains the active circuitry for the immobilization feature. An on board parallel inductor/capacitor tank circuit acts as the 125 kHz receive antenna. When the key is placed into the ignition and turned, the receiver energizes a loop antenna resonant at 125 kHz +/- 7 kHz in order to power the immobilizer on the key (in the event that the cell in the key transmitter is depleted) and transfer data to the key’s immobilizer circuitry. Information and commands are transferred to the key’s circuitry by periodically interrupting the 125 kHz field for predetermined amounts of time. Information is transferred from the key’s circuitry by periodically increasing the power consumption from the 125 kHz field, via a switched resistive load, for predetermined amounts of time. The circuitry in the receiver detects these minute fluctuations of loading and interprets them as digital data. 5200 Auto Club Dr. Dearborn, Michigan 48126-9982 (313) 593-9000 Re: Certification for Lear Corporation Receiver, Model SKREEM FCC ID: KOBDR04A, KOBDR04B IC: 3521A-R04B, 3521A-R04C Skreem Immobilizer Functional Description The Skreem immobilizer module includes a passive anti-theft system whose purpose is to prevent the engine from starting if the module does not detect a valid key upon engine startup. The key contains a battery independent electronic chip (transponder) that derives its energy from the low frequency field. The key electronic device acts as a transceiver when communicating with the module. The module contains a 125 kHz transceiver, a microprocessor, and a vehicle bus transceiver. Upon inserting the key in the ignition lock cylinder of the vehicle, the module is triggered to check the validity of the key by mutual authentication. The module sends a challenge to the key by modulating the 125 kHz carrier signal and then waiting for a response from the key while keeping the carrier on. If the challenge is valid, the key responds with its password by modulating the module carrier signal. The entire radio frequency communication process lasts 80 ms typically. The outcome of this authentication process is sent on the vehicle bus via the bus transceiver. The microprocessor controls the low frequency transceiver by encoding and decoding data to the key. It also handles the communication on the bus. IC Block Diagram of Immobilizer System Operation Coil Key Ignition Lock Cylinder Transponder Coil Low Frequency Transceiver Module Battery Ground Ignition Bus

DUT on OATS Close-up on the DUT on OATS 9

DUT on OATS Close-up on the DUT on OATS 10 DUT on OATS Close-up on the DUT on OATS 9