Remote Selective Unlocking Malfunctions (66 02 96)

Publication date: 1997-05-01
Reference number: 66 02 96

REMOTE SELECTIVE UNLOCKING MALFUNCTIONS

TECHNICAL SERVICE BULLETIN

Reference Number(s): 66 02 96, Date of Issue: May, 1997

REMOTE SELECTIVE UNLOCKING MALFUNCTIONS

Model(s): 1995 BMW 740i

1995-1997 BMW 740iL, 750iL

1997 BMW 528i, 540i, 740i

5 Series (E39), 7 Series (E38) - produced prior to

April 1997

Group: 66 - Remote Control Systems

Bulletin No.: 66 02 96

Date: May, 1997

NOTE: This bulletin supersedes Service Information Bulletin 66 02 96 dated August, 1996.

SITUATION

Under certain circumstances, the selective unlocking function of the remote transmitter (master key) may malfunction in the following manner:

The first press of the unlock button unlocks the driver's door.
The second press of the unlock button fails to unlock the other three doors.
Approximately one second after the second press of the unlock button, the two front windows drop by approximately 2 inches (window lift motors run downward for approximately 400 ms.).
The remaining three doors can then be unlocked with a third press of the unlock button.

CAUSE

A timing problem in the General Module (Software Versions 1.2 through 1.5) can initiate (and then quickly discontinue) the Comfort Opening Feature, temporarily blocking the unlocking of the other doors and dropping the two front windows slightly.

This malfunction only occurs if the second press of the unlock button occurs almost exactly 1.5 seconds after the first press. If the second press of the unlock button occurs outside a narrow window of time (approximately 1.3 to 1.7 seconds after the first press), the above-described malfunction does not occur.

CORRECTION

On a customer complaint basis only, proceed as follows:

Using the DIS Tester, determine the software version of the General Module.
If the software version of the General Module is 1.1 through 1.5, replace the General Module with one of Software Version 1.6 or higher (P/N 61 35 8 376 688).
Initialize all (up to four) Remote Transmitters (Master Keys) to the replacement GM.

Both (or all) transmitters must be initialized.

NOTE: Whenever a customer schedules an appointment for any work which could possibly result in the replacement of a General Module, the customer should be advised to bring all Remote Transmitters (Master Keys) in with the vehicle.

This will avoid the necessity of a second visit to the workshop to initialize the transmitters.

To initialize the Remote Transceivers, proceed as follows:

Using the DIS Tester, select "Body", "Body Electrical Systems", "Locking and Security Systems."

Select "Test Schedule."

Select "3 Service Functions."

Select "3 Initialization."

Follow the displayed procedure exactly!

PARTS INFORMATION

Part Number	Description	Qty.
61 35 8 376 688	General Module	1

NOTE: The Hardware and Software Versions are marked on the exterior of the General Module (e.g., "HW 1.6 SW 1.6").

WARRANTY INFORMATION

Parts and Labor are reimbursable under the terms of the BMW New Car Limited Warranty of 4 years/50,000 miles.

WARRANTY INFORMATION

Defect Code	Labor Operation	Labor Allowance
66 10 01 14 00	Main Labor: 61 00 005 Inspection using DIS Tester	3 FRU
66 10 01 14 00	Associated Labor: 61 35 620 Replacing General Module	4 FRU (E38) 2 FRU (E39)