Annex No.5 Technical Description Tire Pressure Monitoring System (TPMS) 5WK4 7594 SIEMENS VDO Automotive SV C BC P2 RF TG IC: 267T-5WK47594 FCC ID:KR55WK47594 User Manual / Functional Description Tire Pressure Monitoring System - ECU of the Siemens VDO Type 5WK4 7593 (Europe) 5WK4 7594 (USA)
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\Usermanual_ECU_LFantenna.pdf 1 of 5 SIEMENS VDO Automotive SV C BC P2 RF TG FCC ID:KR55WK47594 IC: 267T-5WK47594 General description The tire pressure monitoring system (TPMS) consists of an control unit (ECU) with 4 LF antennas. The TPMS transmitter is mounted on the valve stem of the tire. The RF receiver is integrated on the ECU. The ECU contains the driver circuitry for the LF antennas (4 per system) and the integrated RF receiver (which has been already homologated). The LF antennas are only necessary to locate the tire position after a tire change. The antennas are fixed on the steering stub. When the antennas send a 125 kHz signal to the TPMS transmitter the transponder will be activated and the location of the tire and the corresponding TPMS transmitter can be read. The localisation function enables the vehicle driver to get information about which tire a pressure loss has been detected.
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\Usermanual_ECU_LFantenna.pdf 2 of 5 SIEMENS VDO Automotive SV C BC P2 RF TG IC: 267T-5WK47594 Block diagram The block diagram below shows the main electronic units of the TPMS ECU:
FCC ID:KR55WK47594 3 Provision for Ext RF Antenna Passive LF Initiator FL 2 Wire Drive 5 Passive LF Initiator FR 315 or 433 MHz RF Tx Channel Passive LF Initiator RL 2 Wire Drive 2 Wire Drive 13 2 Wire Drive Passive LF Initiator RR Provision for Spare Sensor Push Button LED Drive Push Button Contact 12 12 12 12 Tyre Sensor Module FL Tyre Sensor Module FR Tyre Sensor Module RL Tyre Sensor Module RR Tyre Sensor Module Spare 1 1 1 1 1 2 TPM Input Push Button Land Rovers Scope
& Responsibility Provision Ext RF Rx for 16 LIN I/F*
LED Drive*
LED Drive*
3 RF Receiver LF Drivers 6 Controller Volcano CAN 4 TPM ECU 11 Ignition Switch Contact Horn Relay Drive*
Land Rovers Scope
& Responsibility 15 LEDs 7 8 Text &/Or Icon Display LEDs 9 10 Sounder Vehicle Instrument Pack Vehicle Systems Interface VBat 17 14
* = Components may be removed after FPDS CP build phase 12
= 125kHz
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\Usermanual_ECU_LFantenna.pdf 3 of 5 SIEMENS VDO Automotive SV C BC P2 RF TG IC: 267T-5WK47594 FCC ID:KR55WK47594 Variants Siemens type designation 5WK4 7594 5WK4 7593 5WK4 7595 Explanation ECU with integrated receiver 315 MHz ECU with integrated receiver 433.92 MHz LF antenna The two ECU variants use the same schematic, layout and assembly! The only difference is the integrated RF receiver (which is not subject to this homologation). Typical usage pattern (for Europe only) 5 minutes / hour 55 minutes / hour Worst case calculation:
4 drive cycles in 24 hours 30 minutes to localise the vehicle
total transmission duration of 120 minutes in 24 hours Transmitter ON Transmitter OFF Duty Cycle: TON / T (ON+OFF) x 100% = 5 / 60 x 100 % = 8.3%
Technical description Carrier frequency:
Frequency shift:
Modulation:
Number of channels:
Rated Output Power:
Antenna:
Voltage supply:
Voltage supply range:
125 KHz
+/- 2%
none 1
<40 dBA/m @ 3 m dedicated Vehicle battery 9 to 16 Volts
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\Usermanual_ECU_LFantenna.pdf 4 of 5 SIEMENS VDO Automotive SV C BC P2 RF TG IC: 267T-5WK47594 Label design USA / Canada FCC ID:KR55WK47594 User manual information IC: 267T-5WK47594 FCC ID:KR55WK47594 This device complies with part 15 of the FCC Rules and RSS-210. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and
(2) this device must accept interference received, including interference that may cause undesired operation. NOTE Changes or modifications not expressly approved by the manufacturer could void the users authority to operate the equipment Label information Siemens VDO 5WK47594 IC: 267T-5WK47594 FCC ID:KR55WK47594 Label design Europe Siemens VDO 5WK47593
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\Usermanual_ECU_LFantenna.pdf 5 of 5