Continental 3H-IMMO Immobilizer Active Antenna User Manual
- June 12, 2024
- Continental
Table of Contents
Continental 3H-IMMO Immobilizer Active Antenna
Product Information
The Continental Immobilizer 3H_IMMO is a system designed to provide vehicle security through immobilization. It consists of various components, including the active antenna, base station IC, serial interface, voltage regulator, and LF antenna. The active antenna generates a magnetic field for charging the transponder and transmitting modulated data. It is connected to the BCM (Body Control Module) via a synchronous serial link. The IMMO_ANT component is installed on the vehicle lockset and is driven by the BCM to generate the magnetic field. The base station IC in the active antenna generates signals for transmission to the transponder in the key and drives the antenna. It also receives the answer from the transponder and sends it back to the BCM. The communication between the components is controlled by software in the BCM. This product complies with part 15 of the FCC Rules and operates within certain conditions to avoid interference.
Product Usage Instructions
- Installation: Install the IMMO_ANT component on the vehicle lockset as instructed in the vehicle’s user manual or installation guide.
- Connection: Connect the active antenna to the BCM using the provided synchronous serial link. Ensure proper connection to the battery supply and ground.
- Power Supply: Make sure the voltage regulator in the active antenna is properly stabilized by connecting it to an appropriate power source.
- Initialization: The BCM sends data for initialization and authentication to the base station IC. Ensure proper communication between the BCM and base station IC for successful initialization.
- Transponder Communication: The active antenna generates a magnetic field to charge the transponder and transmit data. Ensure that the transponder is within range of the active antenna for communication.
- Complete Communication Control: The software in the BCM controls the entire communication process between the components. No user intervention is required for this step.
Note: Any modifications or changes to the device not approved by the manufacturer may void the user’s authority to operate the equipment. Follow all safety guidelines and instructions provided in the user manual.
SYSTEM OVERVIEW
The immobilizer active antenna is suited to be used in combination with
potentially two BCMs (one from Continental and one from CK) and 1 key module
from Renault. System integration with competitor product is not assumed by
Continental. Validation for additional combinations can be quoted upon
request. The whole immobilizer function is accomplished by the mutual
authentication between key and BCM while the active antenna is playing a role
of charging the transponder in key and data modulation (demodulation) in the
communication path. The typical immobilizer system with active antenna can be
referenced as below:
Magnetic field generation:
The active antenna contains base station for driven antenna coil which generates the LF field for charging transponder as well as carrying the modulated data. Serial communication with BCM: The active antenna is connected to BCM via synchronous serial link. LF communication data is converted to baseband signals by active antenna and transmitted in half-duplex mode between transponder and BCM on this interface. The component of IMMO_ANT is to be installed on Vehicle lockset, the IMMO_ANT will be driven by BCM to generate magnetic filed which can charge TxP and works as carrier of data transition. In 3H_IMMO vehicle IMMO_ANT has no function of illumination. The immobilizer circuit contains a voltage regulator, a serial interface, a base station IC and an LF antenna. The serial interface is the communication interface for the communication with the BCM. The BCM sends the data for initialization and authentication to the Base station IC. The active antenna contains the ABIC1 immobilizer base station IC, a ceramic resonator for clock generation, and a voltage regulator for stabilization of power input.It needs to be connected to the BCM for the communication function as well as to battery supply and ground. The Base station IC generates the signals for the transmission to the transponder in the key and drives the antenna. After transmission, the base station IC receives the answer from the transponder and sends the answer to the BCM. The software in the BCM controls the complete communication.
FCC Warnings
Any changes or modifications not expressly approved by the grantee of this device could void the user’s authority to operate the equipment. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
- This device may not cause harmful interference, and
- This device must accept any interference received, including interference that my cause undesired operation.
Federal Communications Commission (FCC) Interference Statement This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Note: Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
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