Weird central locking problem also.

[ss2115]

Don't want to hijack the thread posted by Dave R, so perhaps if his problem is solved, I could get some help with mine.

If I use the key on any lock of my 525i Touring, everything behaves as it should.
But if I use the remote FOB, it will lock and then immediately unlock itself again.

It sometimes takes two or three goes before it will stay locked.
Unlocking with the FOB is not a problem - works perfectly.

Cables to doors and tailgate all okay.
New battery in the FOB makes no difference.
Distance away makes no difference.

My impression is that one of the door keylocks (most probably the drivers side) is worn or loose such that the switches don't contact well or don't disconnect well, but I'm only guessing.
Haven't had a chance to remove the door handle and mechanism for a proper look.

Any other ideas?
Anyone come across this before?

[shogun]

maybe one of the microswitches.
Here the difference between old and new GM:

Here the complete official info:

This Service Information Bulletin supersedes S.I. 61 01 92 (3460) dated January 1992. It incorporates additional
information on the new General Module software for E32/E34 vehicles.
Please remove and discard S.I. 61 01 92 (3460) dated January 1992 from your S.I. Binder.

SUBJECT: New General Modules (GM)

MODELS: 7 Series (E32), 5 Series (E34)
- Vehicles produced 9/91 and later
Situation: New general modules have been used in production since September 1991 in all E32 and E34 models. The software has been completely revised (details of these revisions are found in the attachment to this Service Information Bulletin).
Part numbers have been changed to reflect these revisions, as listed below, as of September 1991.
Model Part Number
E32 61 35 8 356 095,
E34-up to 61 35 8 356 095 9/91 production
E34-9/91 and later production 61 35 8 355 812
Note:
E34 vehicles produced 9/91 and later have different central locking system components from earlier E34 vehicles; therefore, P/N 61 35 8 355 812 is used only in E34 vehicles produced 9/91 and later, P/N 61 35 8 356 095 can be used in E34 vehicles produced prior to 9/91, and in all E32 vehicles. When the general module is connected to the vehicles electrical system, it will recognize (and store in memory) the vehicle configuration, such as:
- with/without power windows
- With/without power sunroof
- with/without wiper contact pressure control
- with/without headlight washers
Important Information
All general modules must be plugged in only after disconnecting the vehicle's battery. If the vehicle's battery is connected when the GM is installed, undefined signal contacts can cause an incorrect vehicle configuration to be stored, resulting in the impairment of one or more of the above-mentioned systems.
If one or more of the GM functions are impaired in this matter, the GM can be "cleared" by disconnecting the vehicle's battery for at least ten seconds.
Warranty Status: Information only.
Attachment to S.I. 61 01 92 (3460)

GM Function Changes E32/E34 (Beginning with 9/91 Production)
- Repeat and Time interlock for headlight washers:
· Time interlock: 3 minutes
· Headlight washing at fifth windshield washing after time interlock.
- Intensive washing pump operating time reduced from 3 to 2 seconds
- Minimum interval for intermittent wiping is programmable down to 2 seconds (previously 3 seconds)
- Increased wiper contact pressure during windshield washing cycle is now also provided during dry wiping portion of the cycle (previously only during washer pump operation).
- Previously, the GM would react to opposing signals (eg., an unlock signal while trying to lock, as with a defective microswitch) by carrying out the first command, then the opposing command (e.g., locking, followed immediately by unlocking).
Repeating the first command then results in carrying out that command (e.g., try to lock again, and locking is now carried out).
This function ("Asynchronous Position") is omitted in the new GM for all E32 models and E34 models prior to 9/91 (P/N 61 35 8 356 095), and remains in the new GM for E34 models after 9/91 (P/N 61 35 8 355 812) only for central locking commands "lock" and "double-lock".
- After unlocking is performed due to crash sensor activation, the locking command is now reactivated by double-locking with the key from either the driver's or passenger's door.
- The "one-touch" operation of windows has been expanded to include all four windows in the opening direction. The driver's window still has "one-touch" operation in both opening and closing directions. Interruption of the "one-touch" feature of the driver's window in the closing direction is still accomplished by depressing any window switch (in any direction), or by depressing the sunroof switch in the "tilt" direction (provided the sunroof is not already in the "tilt" position). Interruption of the "one-touch" feature of the sunroof in the closing direction is still accomplished by depressing the sunroof switch (in any direction).
- The switch-off delay of the interior lights which occurs after entering the vehicle and
closing the driver's door has been reduced from 20 seconds to 15 seconds.

http://bmwe32.masscom.net/johan/doorlock_microswitch/doorlock_microswitch.html

[bimmo_2007]

Happened once or twice few years ago with my E34 & disappeared by it self. it also happened on a 91 E32, cleaning the switches and levers inside the drivers door & lubricating the levers solved the problem.

[Rick L]

I had similar issue. At least for me, it turned out to be the cable to the trunk lock. Cables in the cable harness between the driver’s side rear trunk to trunk lid becomes frayed from constant bend from opening and closing of the trunk and do to the age. Not sure if you check that area yet but seems like a common issue related to locking issues and rear light issues.


Don't want to hijack the thread posted by Dave R, so perhaps if his problem is solved, I could get some help with mine.

If I use the key on any lock of my 525i Touring, everything behaves as it should.
But if I use the remote FOB, it will lock and then immediately unlock itself again.

It sometimes takes two or three goes before it will stay locked.
Unlocking with the FOB is not a problem - works perfectly.

Cables to doors and tailgate all okay.
New battery in the FOB makes no difference.
Distance away makes no difference.

My impression is that one of the door keylocks (most probably the drivers side) is worn or loose such that the switches don't contact well or don't disconnect well, but I'm only guessing.
Haven't had a chance to remove the door handle and mechanism for a proper look.

Any other ideas?
Anyone come across this before?