Continental Automotive TXN1 User Manual

Continental Automotive France SAS
Interior Division- Body & Security

User Manual

of the

Continental

Radio Frequency Transmitter

Model:

TXN1 (433.92 MHz)

TXN2 (315 MHz)

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August 17, 2015

Continental Automotive France SAS
Interior Division- Body & Security

User manual of the TXN1 and TXN2 key

1 General Product Information

This document gives an overview of the different device operation modes and the RF transmissions
performance of the key model TXN1 and TXN2. In this document the device is referenced as "key",
even if the mechanical backup key might be separated from it.

1.1 Trade mark

Continental

1.2 Brand

Continental

1.3 Manufacturer

Continental Automotive GmbH
Siemensstr. 12
93055 Regensburg
Germany

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August 17, 2015

Continental Automotive France SAS
Interior Division- Body & Security

2 Operating modes

The key has three main operating modes which differ regarding of the signal transmitting with the
RF:

• Immo Immobilizer transponder mode

• RKE Remote keyless functionality

• PASE Passive key functionality

2.1 Immobilizer Transponder mode

When the key is operating as an immobilizer transponder, the communication is done via a "contact
less interface" depending on a magnetic coupling.

2.2 Remote keyless functionality

This mode refers to use the key as a remote control unit to initiate actions on the vehicle such as open
or close door latches. RF transmission depends on a user activating (a button pressing) on the key.
During the button pressing the amount of telegrams are sent on the RF channel.

A short valid button pressing results a sending of the minimum number of the RF telegrams.
If the duration of the button pressing extents the time required for transmitting the minimum amount of

RF telegrams, additional telegrams will be sent until the button is released or a timeout of 10s is
reached. This timeout function prevents the unintended transmission over the extended time periods
in case of a button was fixed.

2.3 Passive key functionality

For passive key operation no user action on the key side is required. The trigger is delivered by the
vehicle via an LF 125 kHz data telegram. When the key receives a valid LF message, it responds with
two RF telegrams and the inter telegram timing in this mode depends on the key configuration data
(sort of time slot concept).

- The Low Frequency stage operates at 125 kHz

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August 17, 2015