General

Components:
- Radio frequency DAS control module (N54/3) (model 170 only)
- DAS radio frequency/infrared control module (N54/4) (models 129,140)
- Transmitter key and mechanical key with transponder
- Transponder coil (L11) (located on the steering lock)
- Left/right front door IR receiver (A26/1, A26/2) (models 129, 140)
- Left front door lock switch (CF) (S86/1) (USA)
- Trunk lid lock switch (CF) (588/2) (USA)


NOTE:
Radio frequency DAS control module (N54/3) or DAS radio frequency/infrared control module (N54/4)
The following functions a) and b) are carriered Out with the above noted control modules:

a) Radio frequency/infrared remote central locking:
- Evaluation of the radio signal.
- Evaluation of the infrared signal, (models 129 and 140)
- Activation of - Central locking (CL)
- Remote trunk release (RTR) (models 129, 140)
- Anti-theft Alarm (ATA)
- Comfort feature (models 129, 140)
- Verification signal via turn signal system models 129,140: via combination relay module (N10/2), model 170 via locking confirmation relay module (K54).
(USA) Recognition and evaluation of the mechanical locking nut switch.

b) Drive Authorization System (DAS):
- Activation of the coil for the transponder in the steering lock.
- Recognition and evaluation of the transponder signal.
- With a valid transponder code, the release of the engine control module via CAN.

The drive authorization is independent from the infrared remote control and the battery condition in the transmitter key. The requirement is that the transponder in the transmitter key supplies the proper data via the transponder coil (L11) to the radio frequency DAS control module (N54/3), or DAS radio frequency/infrared control module (N54/4). If the data is recognized as correct, then a start signal is given.

If the transponder is invalid or the energy can not be produced for the transponder coil, the release of the engine control module is not granted. This is indicated via the "Start Error" indicator lamp in the instrument cluster, which is in turn activated via the engine control module. Locking of the engine control module is accomplished via the Radio frequency DAS control module (N54/3) or DAS radio frequency/infrared control module (N54/4). These control modules are connected to the engine control module via CAN data bus. After locking the engine control module (ignition key has been removed from the ignition switch), the engine control module renders the fuel injection system inoperative.

Radio frequency DAS control module (N54/3) or DAS radio frequency/infrared control module (N54/4) and the engine control module are "married" to each other via an identification code exchange. For this reason, the identification codes can not be erased. Thus, it is not possible to swap control modules between vehicles for testing purposes.

Actual Values:
Via the Hand-Held Tester (HHT) up to 8 different transponders can be tested for locking approval. Additionally, the synchronization of the individual transmitter keys can be tested. The HHT can also indicate the current, last used transmitter key. Additionally, an indication is given if the version coding is locked, which means, that after 250 activations (circuit 15 ON), the Radio frequency DAS control module (N54/3) or DAS radio frequency/infrared control module (N54/4) are "married" and it is then possible to perform only limited version coding changes. The readout of the actual values is menu driven.

Revocable and Irrevocable Deactivation:
Tranmitter keys can be revocably deactivated. This is accomplished via the HHT and is menu driven for individual transmitter keys. Via the HHT, revocably deactivated transmitter keys can be reactivated. Both the transponder and transmitter functions are deactivated or activated together. Transmitter keys can be irrevocably deactivated (only upon the customer's consent). This is accomplished via the HHT and is menu driven. The reactivation of the irrevocably deactivated tranmitter key is not possible. The radio and infrared function as well as the transponder function have been deactivated.

Version Coding:
When replacing the radio frequency DAS control module (N54/3) or DAS radio frequency/infrared control module (N54/4), version coding must be performed via the HHT. Upon entry into the actual values menu, the control module number on which the version coding has been performed before is given automatically.
The version coding is menu driven.

NOTE:
The radio frequency DAS control module (N54/3) or DAS radio frequency/infrared control module (N54/4) and the engine control module are "married" to each other via an identification code exchange. For this reason, the identification codes can not be erased and this code remains with the vehicle for the rest of its service life. Only the mechanical locks can be replaced.

If the customer loses an IR transmitter key (which includes a mechanical key):
The vehicle's RCL identification code remains, the lost IR transmitter key (s) is made invalid via blocking. To maintain vehicle security, all mechanical locks should be replaced using a new mechanical lock number code. You must notify your facing PDC of any mechanical lock changes, by using the Lock Change Notice Form.

If the RCL control module is defective:
A new Radio frequency DAS control module (N54/3) or DAS radio frequency/infrared control module (N54/4) must be specially ordered for the specific vehicle, using the same RCL identification code as the previously installed control module.

If a mechanical lock or key is defective:
Replace the mechanical lock or key with a new one, using the same mechanical lock code number (special order from your facing PDC).