Continental Automotive 5WK47631 Immobilizer System 5WK4 7631 User Manual Func Immobiliser 2nd Gen

Continental Automotive GmbH Immobilizer System 5WK4 7631 Func Immobiliser 2nd Gen

User Manual

Siemens VDO Automotive AG SV C BC P2 RF TG File: S:\Postzula\OPEL\Immo2Gen\Func_Immobiliser_2Gen.doc Page 1 of 3 User Manual of the Siemens VDO OPEL Immobiliser type 5WK4 7631
Siemens VDO Automotive AG SV C BC P2 RF TG File: S:\Postzula\OPEL\Immo2Gen\Func_Immobiliser_2Gen.doc Page 2 of 3 System description of the Opel Immobilizer 2nd Generation Redesign The immobilizer 2nd generation prevents drive away car theft powered by its own engine without having a valid key. It uses an inductive data transmission between transponder (mounted inside the key) and the control unit. This data link is working with a carrier frequency of 125 kHz and uses amplitude modulation for transmitting data to the transponder. For the direction from the transponder to the control unit damping modulation with pulse duration coding is used. Functional description After switching on the ignition the immobilizer transmits a random number to the transponder. It calculates a result and transmits it back to the immobilizer. The result is checked and if it is correct, the engine will be released. After that, the immobilizer is switched off until another start is attempted. The longest period for transmitting 125 kHz is 3 seconds. Typical usage pattern (for Europe only) 15 operations in 24 hours with a transmission duration of 2 seconds. → total transmission duration of 1.25 seconds within 1 hour Transmitter ON 1.25 seconds / hour Transmitter OFF 3598.75 seconds / hour Duty Cycle: TON / T (ON+OFF) x 100% = 1.25 / 3,600 x 100 % = 0.03 % Technical Data Carrier frequency: 125 kHz ± 5kHz Field strength: < 40 dBµA/m @ 10m Type of modulation ASK Number of channels: 1 Power supply: 12 V DC Type of battery: car battery Transmission range: 20 cm
Siemens VDO Automotive AG SV C BC P2 RF TG File: S:\Postzula\OPEL\Immo2Gen\Func_Immobiliser_2Gen.doc Page 3 of 3 Block diagrams of the transmitter: ECUUbatTransponderAntenneKl. 30Kl. 31Kl. 15RelaisDWAW-LeitungMotor-kontrolleuchteK-LeitungMotorsteuerungKl. 30Kl. 30510 OhmTester10 kOhm Label design European Community: Siemens VDO 5WK4 7631 USA/CAN: Siemens VDO 5WK4 7631 IC: 267T-5WK47631 FCC ID:KR55WK47631 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 user´s authority to operate the equipment. 125kHz

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