What is going on when pressure release valve 2 stuck in lower rear of valve body bore and not moving smooth and what clutch pack it keeps under pressure when pressure release valve 2 stuck ?
Last edited by Annddrriy; 12-20-2023 at 12:13 PM. Reason: Valve
see page 44 the function of MV2 http://www.bmwe34.net/E34main/Troubl...ch%20Guide.pdf
solenoid....function...gear....MV1....MV2
MV1...shift control...1st......off.......on
MV2...shift control...2nd.....on.......on
.............................3rd......on.......off
.............................4th......off.......of f
...................Rev 0 mph.....on........off
............Rev above 3 MPH..off........on
MV3 lock up control
MV5 line pressure control
so depending if MV2 is stuck cpl/partly in open or closed position your will have problems with 2nd, 3rd, 4th, Rev
Shogun tricks and tips for the E32 series are HERE!
When valve MV2 shift control 2nd gear is on but pressure release valve 2 in lower rear is stuck in bore it will keep pressure in clutch packs A and C and C1 and E. What will happen in this situation a car will continue driving on second gear without shifting to next gear.
Last edited by Annddrriy; 04-02-2022 at 11:33 AM.
The LR valve body is almost the same as yours in your guide shogun, looking at the photos
- Unlisted screen in "channel plate" you have (S1)
- Unlisted screen in "mv1 mv2 body" you dont have, maybe LR specific (S2)
- Unlisted 3 hole vented ball valve behind "REAR SIDE COVER" of "LOWER FRONT VALVE BODY CASTING" you have too
- Missing spring 33, you do have, so must be LR specific too
- Placement of retainer 71 in MV5 body is same for both of us, the problem here is that it is shown incorrectly (for us) in http://www.bmwe34.net/E34main/Troubl...ch%20Guide.pdf , this is why id recommend to stop referencing and sharing this guide, using https://atsgmembers.com/memarea/bull...s/03/03-32.pdf instead
Thanks, it is 60 PRESSURE REDUCING VALVE "2" - It supplies reduced pressure to MV5 which controls Modulation Valve - but I got it out and moving again, no parts needed.
I got hold of the popular nanocom diagnostics tool for LR, and it does infact show a modulation pressure reading in the transmission ecu section, how do you imagine its getting this reading ???
Last edited by haydent; 04-02-2022 at 05:30 PM.
I have a question for you ! I checked BMW E32 735i 02/1990 wiring diagram properly and found 3 wires connected to transmission TCU but when I checked in car those wires connected to engine ECU. What would you recomend me to do in this case ? To put it same as in wiring diagram ? Here is all details in my wiring diagram I made it for. In diagram on left side ECU 19 with TPS 4 and ECU 52 with TPS 6 and ECU 53 with TPS 5. Thanks in advance !
TCU TS.jpgTCU TS-1.jpgTCU TS.jpg
Last edited by Annddrriy; 05-04-2022 at 07:19 PM. Reason: add known number from TPS to ECU
Haydent, I think we are talking at cross purposes. I was referring to the part shown in the third image in your post 352 above. MV5 is the TC clutch. The problem with using ATSG terminology and identification is that it does not correspond with BMW's.
the part in image 3 was not stuck, as far as can tell, no problems with it, just showing it as shogun missed it in guide and unlisted by ATSG, the photo after it is the stuck valve.
The reason I use ATSG terminology as thats all i have for reference, and is what im referring too in my work and posts.
Ill have to get back to you on MV5.
So, going by the few reference documents I have, MV5 is Line pressure control via modulation valve, as stated in #362 and #350
Capture.JPG
My apologies, Haydent. I forgot you don't have a BMW. ASTG say this on page 4 of the Tech Guide: 'SPECIAL NOTE:All nomenclatures in this booklet are ATSG interpretations, not Audi's nor ZF'. So it is hardly surprising that confusion can arise. The wiring diagrams for the E32 4HP22 make it clear which valve is used for which task and may be helpful:
http://www.wedophones.com/BMWManualsLead.htm
No problem, I figured that was the case.
The ball, spring and 3 holed plug that you thought was stuck but wasnt, that i think you called "The part you are describing as a stuck valve is part no. 1043226028. It is certainly present in the Disco TD5 trans which I believe is part 1043010773"
Do you know what this does ?
I made it simple wiring diagram of between transmission TCU and Program Switch to read it how wires connected to. It made for BMW E32 Fan who likes to maintain own cars E32 models.
In wiring diagram or in a car. It should be connected or not where is mess up here ?
The program switch does not latch. It is used to provide a momentary connection to ground.
I made it simple wiring diagram of between transmission TCU and Program Switch to read it how wires connected to. It made for BMW E32 Fan who likes to maintain own cars E32 models. In Page 403 those two diagram is upgrade.
This is how it on diagram connection shown. Other diagram is comming how it connected in car. Page...is ...comming ...soon...
2 position program switch.jpg3 positionProgram Switch.jpg
Last edited by Annddrriy; 04-23-2022 at 05:49 PM. Reason: try to fix attachment
It means the switch connection does not remain made when you remove your finger.
Unfortunately, your link does not work
Last edited by whiskychaser; 04-09-2022 at 01:10 PM.
Do you mean it works same like optic switch ? lightly touch then cluster does it job. Try to click on Attachment on upper left corner it works with me when I click there.
Last edited by Annddrriy; 04-09-2022 at 03:20 PM.
With 2 program switch from wiring diagram shift lock solenoid put it on a side not in transmission valve body. What does shift lock solenoid doing in car 1991-1992 ? it is shift each gears or just reverse gear ?
Last edited by Annddrriy; 04-09-2022 at 07:31 PM.
It is like the horn button - when you press it, a connection is made. When you don't, it isnt.
The shift lock solenoid is there to ensure you have your foot on the brake before you move the shift lever out of park. At the time, Euro cars didn't have it
You may be able to see the diagram as you own it. But I get 'Invalid Attachment specified. If you followed a valid link, please notify the administrator'
Try to open attachment if is works. Do you mean shift solenoid keeps the shift lever in park position before you put foot on the brake ?
Yes. It is item 10 here: https://www.realoem.com/bmw/enUS/sho...diagId=25_0051
Your diagram in post 366 is now visible. Thanks
Ok thanks ! What resistance should be between Transmission TCU pin7 which goes to TPS pin 3 ?
Last edited by Annddrriy; 10-12-2023 at 01:31 AM. Reason: TPS
Where could I get USA and CANADA wiring diagram bmw E32 models 1988-1992 ?
Last edited by Annddrriy; 04-10-2022 at 02:22 PM.
All diagrams can be found here: https://www.meeknet.co.uk/E32/Index.htm
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The throttle switch contains a variable resistor. So you would expect a variable voltage output on pin 3. Do you have that? Have you got fault code (5?) in the TCM? How is the wiring disconnected - has someone just cut it?
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