User manual VAG Immobilizer System Type 17A 920 790 Keller, I ID S3 AD AE 1 Page 1 23.10.
Table of contents 1 2 3 4 5 6 System overview………………………………………………………………………...3 Short description of the module………………………………………………………..3 Transponder……………………………………………………………………………...4 Power supply……………………………………………………………………………..5 Technical data……………………………………………………………………………5 Label………………………………………………………………………………………6 Keller, I ID S3 AD AE 1 Page 2 23.10.
1 System overview The module described within this document is used in the following system environment: VAG Immobilizer System WFS 5a The VAG Immobilizer System WFS 5a is, among other things, an integral part of all MQB instrument clusters. An immobilizer distinguishes between authorized and unauthorized users and thus it prevents the engine from running unless the correct key (transponder) is present.
Figure 1: Principle of data transmission between transceiver and transponder The microprocessor interface (µPI) connects the analog front end (AFE) with the microcontroller. The communication between transceiver and microcontroller is made via two wires (L/Z_IN and L/Z_OUT). L/Z_IN is the data input of LRES B2, L/Z_OUT is an open drain output which is also used as input.
True 32 bit identifier (Long ID) Secret-Key in EEPROM (unreadable) Free User Memory (UM) Data transmission performed by amplitude modulation Transmission rate for 125 kHz transponder communication: 4 kbauds Special protected dataset storage intended for mileage counter Lock-bits to inhibit programming Operating temperature range -40 to +85°C 125 kHz field frequency On chip rectifier and voltage limiter 4 Power supply Because ANT drivers drive antenna with VDD and VSS power supply lev
AGND level VAGND 2,35 VIH VIL IL 0,8 VDD 2,5 2,65 V Full temp. range 0,2 VDD +1 2,5 0,4 V V A mA V Full temp. range Full temp. range Full temp.
6 Label Information USA and Canada United States (US) This device complies with Part 15 of the FCC Rules. 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. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
Owner Manual: 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. Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence.
