Remote Control Antitheft System (DWA IV)

GROUP 66
Remote Control Systems

Bulletin Number
66 01 97

Woodcliff Lake, N.J.
Product Engineering
May 1997

This Service Information bulletin supersedes (Orange) S.I. 66 01 93 (3921) dated December 1993 which should be removed and discarded from your S.I. binder.

SUBJECT:
Remote Control Anti-Theft System (DWA IV)

MODEL:
540i (E34); 8 Series (E31) - vehicles produced 9/93 and later.

Situation:
Remote Control Transmitters cannot be initialized to the receiver ("Initialization Block Active").

Cause:
The above-mentioned vehicles are equipped with a remote control for locking/double-locking and arming/disarming DWA. In these vehicles, DWA can only be armed/disarmed by means of the remote control transmitter (arming/disarming by means of the master key in the door lock is not possible).

NOTE:
If the mirror is electrically disconnected from the vehicle (even if DWA is not armed), the "Panic Mode" of DWA is tripped. The vehicle battery (or batteries) must be disconnected prior to the removal of the inside rear view mirror for any reason.

If DWA is tripped due to mirror removal, reconnect the mirror and switch off DWA by means of the remote control transmitter.

Correction:
Initialization of the transmitters to the receiver in the mirror is performed as follows:

1. Enter the vehicle and shut all doors.

2. Turn ignition switch to the Accessory position (KI. R), and then turn it off again within 5 seconds.

3. Holding the transmitter near the mirror, depress and hold down the unlock button (button with the up arrow marking).

4. While holding down the unlock button, depress and release the lock button (button with the BMW logo) three times (within 10 seconds of depressing the unlock button).

5. Release the unlock button and continue to hold the transmitter near the mirror until the LED on the transmitter quits flashing.

6. Without turning the ignition on again, repeat steps 3 through 5 for additional transmitters (up to four transmitters can be initialized to one receiver).

Confirmation of initialization is recognized by the door lock buttons being activated (to lock position, then immediately back to the unlock position) when the lock button of the remote control transmitter is released during the initialization procedure (see steps of the procedure).

If this lock activation does not take place as described, initialization has not occurred. This may be due to improper initialization procedures, or due to an "initialization block" being present in the receiver.

Initialization can be "blocked," as a security measure, under two circumstances:

- if the transceiver loses its initialization (failed transmitter) while the DWA is armed, or

- if the mirror is removed while the DWA is armed

The initialization block is also active whenever the vehicle is locked to prevent any other transmitter from being initialized to the receiver.

If a vehicle is encountered with an initialization block, remove the block using the following procedure.

Procedure:

Using the DIS Tester:

1. Select "Diagnostics"

2. Select Vehicle (e.g., "5" E34") and "Diagnosis"

3. Select "12 Radio/IR System"

4. Select "5 Special Functions"

5. Select "2 Cancel Initialization Lock"

Warranty Information:

Information only. Removal of the initialization block is included in the procedure for initializing remote control transmitters, as part of repairs to the DWA System.