MRXDCXAMRX1Automotive Systems Monitor Receiver

Re: Certification for Schrader MRXDCXAMRX1 Receiver Model: MRXDCXAMRX1 FCC ID: MRXDCXAMRX1 CANADA: to be provided by IC USER'S MANUAL INFORMATION (PRELIMINARY) The User's Manual is in preparation. Since the device, when installed, is not accessible for inspection of the FCC/IC ID numbers, following material will be contained in the manual: FCC ID: MRXDCXAMRX1 CANADA: to be provided by IC 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.

Re: Certification for Schrader MRXDCXAMRX1 Receiver Model: MRXDCXAMRX1 FCC ID: MRXDCXAMRX1 CANADA: to be provided by IC POWER OF ATTORNEY A letter granting Valdis V. Liepa the Power of Attorney is on file and can be provided when so requested. 11 Technology Park, Belfast Road, Antrim. N.Ireland. BT41 1QS Letter of Agency February 26 th , 2001. American Telecommunications Certification Body Inc. 6731 Whittier Avenue Suite C110 McLean, VA 22101 Re : Power of Attorney for Valdis V. Liepa To Whom it may Concern : Please be advised that Schrader Electronics Ltd. authorises Valdis V. Liepa to act on our behalf, until otherwise notified, for applications submitted to American Telecommunications Certification Body, Inc ( ATCB ). We certify that we are not subject to denial of Federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse ACT of 1988, U.S.C. 862. Further, no party, as defined in 47 CFR 1.2002(b), to the application is subject to denial of federal benefits, that includes FCC benefits. Thank you for your attention to this matter. Sincerely, Brendan McDonnell, Project Leader Schrader Electronics Ltd. Tel. +44 2894 482078 Fax +44 2894 468440 Date. Re: Certification for Schrader MRXDCXAMRX1 Receiver Model: MRXDCXAMRX1 FCC ID: MRXDCXAMRX1 CANADA: to be provided by IC GENERAL PRODUCT INFORMATION The device, for which certification is pursued, has been designed by: Schrader-Bridgeport International 1609 Airport Rd. Monroe, NC 28110 Brendan McDonnell Tel: +44 2894 482078 Fax: +44 2894 468440 It will be manufactured by: Schrader Electronics Ltd., 11 Technology Park, Belfast Road Antrim, N. Ireland. BT41 1QS Brendan McDonnell Tel: +44 2894 482078 Fax: +44 2894 468440 It will be marketed and serviced by: Daimler Chrysler Dealers in USA & Canada

Bulb Driver RF Receiver Micro-controller Diagnostic Interface EEprom RTPM Hardware Block Diagram The receiver hardware consists of three main areas :- RF receiver, processor and bulb driver and diagnostic interface. Data is received from the RTPM transmitter via radio signals.

Overview A system has been developed to monitor a vehicle's tire pressures and display real-time pressure values or warning messages/indications on the instrument panel display while the vehicle is on the road. An electronic unit inside each tire, mounted to the valve stem periodically measures the tire pressure, and by means of radio frequency communication transmits the pressure value to a dashboard-mounted receiver. The receiver generates a signal to another unit in the car called a Body Controller Module (BCM). The BCM uses this signal to control a warning bulb. Overall Description The RTPM Receiver is one part of the RTPM System. The complete RTPM System comprises four RTPM transmitter systems, a RTPM receiver, a BCM and bulb, and an interface to a Diagnostic Unit. There is one RTPM transmitter located inside each tire. The RTPM receiver and the bulb are located in the dashboard. The diagnostic unit is not connected in normal operation. Bulb(via BCM) 4 Transmitters (One per wheel) Receiver Diagnostic Interface