General

Components:
- Electronic ignition lock control module (N73),
- ESC control module (N26/5),
- Transmitter key with integrated electronics,
- Roof control panel control module (N70),
- Radio antenna,
- Left/right front door IR receiver (A26/1, A26/2),
- Left/right front door lock switch (CF) (586/1, 567/1) (USA),
- Trunk lid lock switch (CF) (S88/2) (USA),
- Front driver-side/passenger-side door control module (N69/1, N69/2),
- Signal pick-up and activation module (SAM) (N10/1).

Electronic Ignition lock control module (N73):
The following functions are carried out.
a) Radio frequency/infrared remote central locking:
- Evaluation of the radio or Infrared signal
- Activation of:
- Central locking (CL)
- Anti-theft Alarm (ATA)
- Remote trunk lid release (PSE/RHR)
- Confirmation signal via blinker system.

A confirmation signal is not sent if the mechanical key is used to unlock or lock the vehicle. However, the central locking system (CL) and the ATA system are indeed activated

b) Drive Authorization System (DAS):
- Voltage supply to the transmitter key
- Reception and checking of the authentication value of the transmitter key.
- Release of:
- Electronic steering lock
- Engine control module (DAS 2)

NOTE: The drive authorization is independent from the infrared remote control and the battery condition in the transmitter key. Drive authorization requires the transfer of secret data codes between the transmitter key, electronic ignition switch, electrical steering lock and the engine control module.

Locking of the engine control modules occurs via the electronic ignition switch (N73). The electronic ignition switch is connected via a CAN Data line to the engine control module. After locking of the engine control module (ignition key in ignition OFF position), the engine control module disables the fuel injection system.

For testing purposes, the installation of both the electronic ignition lock control module (N73) and the ESC control module (N26/5) is possible, during this Test Cycle. The test cycle is limited by a test cycle counter.

Test Cycle:
The components are in a test cycle until they are activated and can be personalized numerous times. Within the test cycle, the components respond to all authentication requests without testing the obtained data. Data is checked however, after the personalization during the test cycle. These procedures are limited by the test cycle counter.

Test Cycle Counter:
Limits the duration of the test cycle. For each requested function, the test cycle counter counts one cycle back. Once the test cycle counter reaches the Zero value, any additional tests are no longer possible. As a result,the components will automatically activate, which means they are "married" to the vehicle. the status of the test cycle counter can be readout via the HHT.

Version Coding:
Replacement of the Electronic ignition lock control module (N73) requires version coding via the HHT. The version coding is menu driven.

NOTE: The Electronic ignition lock control module (N73), ESC control module (N26/5) and the engine control module are "married" to each other via an identification code exchange. For this reason, the identification codes can not be changed and remain with the vehicle for it's service life. Only the mechanical locks can be replaced.

If the Electronic ignition lock control module (N73) or ESC control module (N 26/5) becomes defective:
It will be necessary to replace the defective component and program the replacement control module.

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

Loss Of Transmitter Key:
The vehicle identification code remains, the lost transmitter key is made invalid via desynchronization.

All mechanical locks are 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.

Desynchronization:
If a transmitter key is lost, it must be desynchronized and the mechanical locks replaced. Desynchronization is only possible via the HHT.

Revocable and irrevocable Deactivation:
Transmitter keys can be revocable deactivated. This is accomplished via the HHT and is menu driver'. Entry into the menu is as follows: Body and Accessories-EIS-Control module adaption-Deactivate transmitter key. 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 transmitter key is not possible, since the replacement transmitter key, when used, will erase any codes from the lost key.

NOTE: If a transmitter key is lost and additionally provided key is used (not a replacement transmitter key), the lost transmitter key must be deactivated.