Yesterday I came into the garage and hear the chime constantly making noise, gong, gong, gong. Could not be a weak battery, as I had the battery on the charger and the battery is just 6 months old. Anyway, tested the battery, o.k.
Switched ignition on ACC, gong stopped. Then came on again.
Made a test drive, gong came on randomly, sometimes for minutes, sometimes only a few gongs. Came home and at that time the gong was off, switch engine off, gong starts again.
No warning in the check control. Even with key out of ignition the gong continued.
So I started checking
installed different chime, same problem
installed different cluster, same problem.
pulled the CCM, even with pulled CCM and no key in ignition the chime continued.
Chime went off when I pulled the black connector on the chime left hand under dash left side of steering wheel, there are 2 plugs/connectors, 1 x white, 1 x black.
So I started to study the ETM for a 1989 model E32 http://shark.armchair.mb.ca/~dave/BMW/e32/e32_89.pdf
On page 7100-25 picture 3 you can see
X518 connector black, 4-Pin
X522 connector white, 3-Pin
X518 black on my car has only 2 wires, 1 x Red-White, 1 x Blue-White.
X522 has 3 wires on my car
Removing plug X518 stopped the gong, so I could concentrate of where this one goes in the ETM. X522 is connected with the instrument cluster, X518 with the OBC on board computer, see page 6581-07. And it is also connected always with terminal 30, constant 12V.
OBC pinout is here and that shows there are the 2 pins for the chime http://www.bmwe34.net/E34main/Upgrade/OBC.htm
OBC
pin1: violet/green/yellow, alarm system
pin10: black/green, starter
pin6: + from fuse F17
pin9: + from fuse F20 (red/yellow)
pin8: + from fuse F1
pin22: grey/red, light switch
pin25: yellow/red, turn signal switch
pin3: white/yellow, diagnostics
pin16: white/violet, diagnostics
pin14: white/grey, instrument cluster
pin7: black/white, instrument cluster
pin4: ground
pin5: blue/red/yellow, temp sensor
pin20: black/red/yellow, pre-ventilation
pin21: black/white, pre-ventilation
pin23: violet/white/yellow, alarm system
pin17: red/grey/yellow, alarm system
pin26: black/red/yellow, fuel tank level sensor
pin12: brown/violet, fuel tank level sensor
pin11: white/black, DME
pin24: black/violet, DME
pin19: white/red, chimes
pin18: white/blue, chimes
pin15: white/brown, radio
pin2: blue/brown/yellow, radio
So I removed the radio to remove the OBC, installed a spare OBC, problem gone!
Never heard about such a problem before. So if you have a problem with the chime randomly coming on, this info might help.
Shogun tricks and tips for the E32 series are HERE!
Questions to the electronic wizards. Could that defect in the OBC IV be caused by defective capacitors? If there are some in at all, no idea.
Did not open it as I am not the electric expert and I have some spare OBC IV. The only pics from inside the OBC IV are on the site of John Evans http://www.evansweb.info/category/bmw-repairs/list/
No idea if that could be caused by bad capacitors. Maybe a member here has opened it up and has some hints?
Edit:
I also asked on the German E32 forum, one E32 owners had a similar problem, here the German text and thereafter my brief translation:
Hallo Erich, da sind Elkos drin, Reparieren! Meiner hat mal in der Nacht die Alarmhupe dauer hupen lassen, bis ich die Batterie abgeklemmt hatte.Da war ein Elko gestorben und hat das verursacht.
there are capacitors inside, repair it!
My E32 once started in the middle of the night the alarm horn and only stopped, after I had disconnected the battery. There was one 'dead' capacitor inside and that was the cause of the trouble.
Last edited by shogun; 09-12-2017 at 09:06 AM.
Shogun tricks and tips for the E32 series are HERE!
gong sounds, pin assignment, negative, positive
https://www.youtube.com/watch?time_c...&v=pxnlJAvyr5s
https://www.youtube.com/watch?v=V2BPO4_nk90
Shogun tricks and tips for the E32 series are HERE!
gong pinout in German language, in total 4 plugs are possible and there are 9 pins (usually not all used, depending on options, country spec etc.)
Er besitzt 4 Steckplaetze, 9 PINs und kann 5 verschiedene Toene abspielen.
Für den Betrieb des Gongs, bzw. das ansteuern der einzelnen Toene, wird nur Spannung (12V - 14V), sowie Karosseriemasse (sowie natuerlich die jeweilige geschaltete Masse / Spannung) benoetigt.
4-poliger Steckplatz: PIN - = Karosseriemasse PIN T1 = Ton fuer "Memo" PIN T2 = Ton fuer "Temperaturwarnung" und "Geschwindigkeitswarnung" PIN + = Spannung (12V)
3-poliger Steckplatz: PIN - = Karosseriemasse PIN T3 = Ton fuer "Schluesselwarnung" (Schluessel im Zuendschloss & Tuer offen) (USA) PIN + = Spannung (12V)
1-poliger Steckplatz rechts: PIN T4 = Ton fuer "Einparkhilfe" (PDC)
1-poliger Steckplatz links: PIN T5 = Ton fuer "Rueckwaertsgang" (Japan)
Die Toene T1 - T4 werden mit einem Masseimpuls gestartet.
Der Ton T5 startet durch Anlegen von Spannung, ist also nicht massegesteuert.
Ton T1: kurzer Masseimpuls = Kurzer 3er-Ton / laengere Masse = andauernde Tonfolge (wie 3er Ton)
Ton T2: kurzer Masseimpuls = melodisch abklingender Einzelton / laengere Masse = andauernde Tonfolge (wie Einzelton)
Ton T3: kurzer Masseimpuls = melodisch abklingender Einzelton (wie T2) / laengere Masse = ununterbrochen andauernder Ton (wie Einzelton ohne Unterbrechung) Ton T4: kurzer Masseimpuls = Kurzer Piep-Ton / laengere Masse = ununterbrochen andauernder Ton (wie Piep-Ton ohne Unterbrechung)
Ton T5: kurzer 12V-Impuls = melodisch abklingender Einzelton (tiefer als T2/T3) / laengere 12V-Versorgung = andauernde Tonfolge (wie Einzelton)
T3 & T4 sind in ihrer Laenge also abhaengig vom zugefuehrten Impuls. Alle anderen Toene durchlaufen bei laengerem Impuls automatisch eine melodische Abfolge.
=====================
It has 4 slots, 9 PINs and can play 5 different sounds.
For the operation of the gong, or the control of the individual sounds, only voltage (12V - 14V), and body ground (and of course the respective switched ground / voltage) is required.
4-pole slot: PIN - = body ground PIN T1 = sound for "Memo" PIN T2 = sound for "temperature warning" and "speed warning" PIN + = voltage (12V)
3-pole slot: PIN - = body ground PIN T3 = tone for "key warning" (key in lock & door open) (USA) PIN + = voltage (12V)
1-pole slot right: PIN T4 = Tone for "parking assistance" (PDC)
1-pole slot left: PIN T5 = Sound for "reverse gear" (Japan)
The tones T1 - T4 are started with a ground pulse.
Tone T5 starts by applying voltage, so it is not ground controlled.
Tone T1: short ground pulse = short 3 tone / longer ground = continuous tone sequence (like 3 tone)
T2: short ground pulse = melodic decaying single tone / longer ground = continuous tone sequence (like single tone)
T3: short ground pulse = melodic decaying single tone (like T2) / longer ground = continuous tone (like single tone without interruption) T4: short ground pulse = short beep tone / longer ground = continuous tone (like beep tone without interruption)
Tone T5: short 12V pulse = melodic decaying single tone (lower than T2/T3) / longer 12V supply = continuous tone sequence (like single tone)
So T3 & T4 are dependent in their length on the supplied impulse. All other sounds automatically run through a melodic sequence at longer impulse.
Last edited by shogun; 01-15-2022 at 08:25 PM.
Shogun tricks and tips for the E32 series are HERE!
<Hallo Erich, da sind Elkos drin, Reparieren!>
"Al.Elko" seems to translate as "Aluminum Electrolytic"
These are "kondensoraten" = capacitor or condenser.
As shogun says, when capacitors fail to open-circuit, the attached computer circuits begin erratic operation, including Chiming. As with Instrument Cluster, etc., so with OBC.
Yes, Elkos means Elektrolytische Kondensatoren, Elko is just a German abbreviation, = capacitors like in the cluster
Shogun tricks and tips for the E32 series are HERE!
more info on chimes https://www.youtube.com/watch?v=ZFZzWNlwiRk
Last week someone had a similar problem like I had on the German forum, in his case it was a cluster problem, he changed the cluster and the gong stopped.
So always check the wiring diagram and test as I did in my post # 1
Last edited by shogun; 01-15-2022 at 10:04 PM.
Shogun tricks and tips for the E32 series are HERE!
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