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What is different between those two throttle position switch for model M and EH one time I ordered from USA brand new came with housing. The sale man was ask me the question I remind now what type of transmission in the car I answered its automatic transmission than next question he asked Its M or EH that time I didn't know what to tell him and he decided to do on his own. After I called him to make some other purchase he didn't answer to my phone call. Is there any possibility TPS has dummy pin inside for the harness plug if this is a TPS for a manual transmission 5 speed.
shade tree mechanic
Moderator
you can check that in the ETK, they have different part numbers, they are different, different connections, they cannot be mixed up as your automatic car has 6 pins
throttle valve switch 13631273265 Manual and 13631708605 Automatic EH
Manual has 3 pins https://www.eeuroparts.com/Parts/108...r-13631273265/
automatic has 6 pins https://www.eeuroparts.com/Parts/303...r-13631708605/
Shogun tricks and tips for the E32 series are HERE!
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I think setting not right in valve body.
- - - Updated - - -
Yes I did not check that thanks.
Last edited by Annddrriy; 01-01-2022 at 03:28 PM.
shade tree mechanic
Moderator
I have read of many cases where hard shifting came from defective throttle position sensors. On the German Forum someone even changed the transmission and the hard shifting still continued, he had measured the TPS, did not find any defective measurement, then he bought an original new TPS, installed it and the problem was gone. Maybe you buy a good, new, original TPS and test it.
Last edited by shogun; 01-01-2022 at 07:34 PM.
Shogun tricks and tips for the E32 series are HERE!
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My car throttle position switch was ordered from USA BMW dealer brand new came with the housing. There is an adjustment on throttle position switch can be move up and down no more than 4mm only that degree angle change the signal to TCU. I noticed when car idling for half an hour it shifts better but not as should be. There is two issues in oil and in switch box. Oil a bit like a close to differential gear oil not like a spring water which can flow faster through the valve body channels. Switch box could have sticking valve inside I'm going to change switch box to another refurbished.
Last edited by Annddrriy; 01-01-2022 at 03:49 PM.
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Adaptive shift-quality control uses information of environment, such as changes in the transmission to improve the quality of shifts. This system can also adjust shift smoothness to suit driving style crisper shifts aggressive driving or smoother shifts for normal driving.
Last edited by Annddrriy; 01-01-2022 at 05:40 PM.
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Adaptive shift-quality control uses information of environment, such as changes in the transmission to improve the quality of shifts. This system can also adjust shift smoothness to suit driving style crisper shifts aggressive driving or smoother shifts for normal driving.
AM switch beside gears selector. A switch for adapt shift using environment for smooth shifting. M switch is to lock the gear in to 3rd if selector is set to option D. This driving option not pick up speed faster than A mode switch. How to make automatic transmission TCU adapt to the engine ECU ? Adaptive shift-quality control such as changes in the transmission to improve the quality of shifts. This system can also adjust shift smoothness to suit driving style crisper shifts aggressive driving or smoother shifts for normal driving.
1.Clearing TCU codes
2.Default tranny settings
3.Throttle readaptation critical when doing any tranny or engine work. The ecu and tcu works together on many things. clear ecu also for engine work.
1.Key on don't start just turn the car on
2.Gas down to floor for 10 sec
3.While holding gas, turn key off
4.Let go of gas
5.Key on again gas down to floor for 10 sec while holding gas turn key off don't start wait for 5 min for throttle readaptation. Touch nothing.
6.Then start while touching nothing.
7.Drive and see what happens.
its uncommon to have to do this over and over because you make small changes and forget to reset yet again. Make one last change forget the final reset, then give up and shoot the car with a shotgun. So for those that missed it *always reset last !
Last edited by Annddrriy; 01-01-2022 at 07:34 PM.
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In car A/M switch. When I ordering online program switch for my car it shows 3 program switch option S/E/M. 750il also has 2 program switch with adaptive TCU. 3 program switch will work with 4 solenoid valve body ?
Last edited by Annddrriy; 01-02-2022 at 03:30 PM.
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Wiring diagram for the date of your car shows A/M is correct. But put your VIN in realoem.com to confirm. The only adaptation your car will have is to self adjust the clutches for wearOriginally Posted by Annddrriy
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Yesterday noticed when gear shift to second but first still on than slowly releasing or not releasing running on both.
Last edited by Annddrriy; 01-02-2022 at 01:34 PM.
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Selector is set to position D shifted to second gear from first gear and seems to be like first gear still engaged when 2 seconds gear is already on or both gears engaged. If second gear engaged why it need forward gear to be engaged ? TCU has missing connector pin #6 in some car 1991 750iL looks like running on hydraulic without solenoid shift. In repair manual pin 6 connected to two position program switch and TPS in 1990 735i and in model 750il with adaptive TCU pin #6 go to solenoid 2. and program switch pin #3 is grounded. Without adaptive TCU pin#6 go to program switch pin #3.
Last edited by Annddrriy; 01-02-2022 at 03:43 PM.
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What does shielded wire to speed sensor two wires mean ?
Last edited by Annddrriy; 01-02-2022 at 06:38 PM.
shade tree mechanic
Moderator
you cannot compare E32 735 and 750 wiring, they are different. M70 does not have a TPS installed like your M30 as all is fly-by-wire system http://www.europeantransmission.com/...MW/EML-BMW.pdf
also the DMEs are different, you have M1.3 and the 1991 M70 has M1.7 with 88 pins, the older M1.2 and M1.3 have much less pins.
A shielded wire is a wire which has been covered with protective sheathing to reduce the amount of electromagnetic radiation which it emits. This is designed to reduce the amount of electromagnetic interference (EMI) associated with that wire.
Shogun tricks and tips for the E32 series are HERE!
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Total pins 6 on TPS on diagram has 3 wire coming from and those 3 more wires is a shield ? Or 3 pins in TPS not in used ?
Last edited by Annddrriy; 01-02-2022 at 08:24 PM.
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Do you have TCU pinout for E32 1990 same like for motronic 1.3 ?
Last edited by Annddrriy; 01-02-2022 at 11:38 PM.
shade tree mechanic
Moderator
Which production month 1990? should be in here, maybe you have to check the wiring diagram for each pin of the TCU https://shark.armchair.mb.ca/~dave/BMW/e32/
pay attention to production month, for example the 1990 ETM is from 06/1989 - 08/1990
this only has early E-7 and E-7 http://www.europeantransmission.com/...MWtechinfo.htm
see ETM how the 6 wires are connected, also google for shielded wires, that explains it.The plug going to the CPS also has the pin identification numbers
Last edited by shogun; 01-02-2022 at 11:43 PM.
Shogun tricks and tips for the E32 series are HERE!
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02/1990 BMW E32 735iA M30 B35 Thanks ! Some wires goes to ECU from TCU. I am trying to understand how A/M and S/E/M switches works. I noticed 3 position switch has 6 wires of one extra solenoid for E7 version 5 solenoids and 2 position switch has 5 wires only same like 750 model also has E9 version 4 solenoids and pinout a bit different pin #3 grounded from program switch and 735 program switch pin#3 go to TCU pin#6 than TPS pin#2. Why I ask someone post it TCU has missing ground on pin#6 of 1991 750iL TCU. Maybe in my car TCU also some ground missing.
Last edited by Annddrriy; 01-03-2022 at 12:51 PM.
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Page 2465-02 of the diagrams for 1991 750i (to August) shows pin 6 is a ground. There is nothing missing. Are you trying to find out how to get sport mode on your car?
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Page 2465-02 it shows you that just a checking virtually on diagram but when you doing the job in real there is pin #6 is not grounded. Why is like that I don't know. I am trying to understand how it works those two program mode between each other for me is difficult am noob in this. I am planning to buy scan tool Snap-On one its has lots great feature for diagnostic also has olisoscope build in. Snap-On doing good job. Also I am looking a bit more torque to input shaft to shifts from forward gear through to third gear by adjusting somehow torque convertor pressure flow to coupling components. My car a bit slow at pick up speed I can press accelerator a bit more but this is not works this way. First 3 gears not using torque convertor clutch lock up solenoid last 4th gear does. I don't need more torque in 4th gear just 3 forward gears only that's all. Thanks in advance for your answer ! Happy New Year 2022 !
Last edited by Annddrriy; 01-03-2022 at 06:56 PM.
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This early E-7 do not give me full details of pins for E-9 version there is few pins locate different I don't think there is more upgrade few pins removed from E-9 version. Program switch E-7 has 6 pins in use and E-9 has 5 pins in use only. I don't know what is in my car pinout no info about E-9 version as this is not that complicated transmission as other 6 speed transmission pinout but those two control units pin terminal identification early E-7 version should be ok to find out. Thank You !
Last edited by Annddrriy; 01-03-2022 at 07:04 PM.
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Impeller has a lots vanes inside and spin by engine crankshaft creates pressure by oil pump to move transmission fluid. Turbine is forced to rotate by pressurized fluid from impeller. Transmission input shaft connected by splines with turbine than connected to forward gears clutch "A" and more gears except 4th gear. Input shaft 4th gear is a last gear connected by splines with lock up clutch. Input shafts has two splines one is small diameter splines shaft for lock up clutch and another one is big diameter splines shaft for turbine. When engine running 750 RPM at idle car not moving selector gear is set to position D. Is this stall speed ? Thanks ! Lower picture not correct.
42966.jpg
Last edited by Annddrriy; 01-08-2022 at 12:13 PM. Reason: picture upgrade
shade tree mechanic
Moderator
What is Stall Speed?
Stall speed is the speed at which the converter holds back or limits the engine speed if the transmission output is prohibited. When your torque converter prevents the power transfer from your engine to your transmission, it increases the engine’s RPM stalls. For example, when you press down on your gas pedal, the stall speed is the gap between where your vehicle idles and begins to move. The more stall speed you have, the more pressure you have to put on the gas pedal before your car begins to move.
https://revmaxconverters.com/part-un...-stall-speeds/
In other words, stall speed is the engine RPM at which the torque converter transfers the power of the engine to the transmission. In the real world, the torque converter’s stall speed roughly equates to the clutch engagement point on a manual transmission.
https://official.bankspower.com/tech...g-stall-speed/
auto lockup and torque converter pics
we had a torque converter rebuilt here locally and the shop took some photos. The symptoms were slippage under sudden strong acceleration and occasional juddering looks as if the clutch material had completely disintegrated and it was direct steel on steel contact. close up of lockup surface
http://www.bimmerboard.com/members/h...Convertor3.jpg
overall of lockup
http://www.bimmerboard.com/members/h...Convertor2.jpg
all parts
http://www.bimmerboard.com/members/h...Convertor1.jpg
Last edited by shogun; 01-04-2022 at 09:06 PM.
Shogun tricks and tips for the E32 series are HERE!
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I got your point. The less stall speed I have the less pressure I have to put on the gas pedal before my car begins to move. Is possible to make adjustment for stall speed when selector is set to position D brakes are release fluid flow from impeller to turbine makes torque rotation to forward clutch pack. Rear wheels not moving. Set less stall speed adjustment by valve body settings ?
Last edited by Annddrriy; 01-05-2022 at 07:24 AM.
Member
If settings not available in valve body. Another possible adjustment stator angle vane upgrade to direct fluid flow from impeller to turbine to make better torque rotation.
Last edited by Annddrriy; 01-05-2022 at 01:08 PM.
shade tree mechanic
Moderator
why do you not first of all check the normal function of the system instead of modifications?
Ever tested the pump pressure?
The workshop manual tells us for 4HP22/24 on page 24-00/3
connect hose with pressure gauge
remove pertinent plugs for pressure control testing on the transmission
1. pump pressure
2. clutch A
3. converter pressure
pump pressure
install adapter with seal on transmission
install adapter for converter pressure
pump pressure
position D, gear 1 , speed 700 - 1000 RPM, pressure 6.0-7.5 bar
position D, gears 2,3,4, approx 4000 RPM, 4.6 - 5.8 bar
position R, reverse, 700-1000 RPM, 11-13 bar
converter pressure
position D, 4th gear, converter locked, max. 0.7 bar
check, correct oil level with selector lever at P and engine running at idle speed.
car parked at level floor
the oil level should not be below ball 1 at the dipstick after a test drive and ATF temperature of approx. 40 DC. The oil level should be between the min and max marks at ATF temperature of approx. 80 degree C. Amount of ATF between min and max = approx 0.3 liter.
ATF level too high: strong foaming, ATF splash loss, high temperature when driving test, ATF lost via vent.
ATF level too low: valves rattling, foaming, engine slipping while driving in curves, general operating disturbances.
Shogun tricks and tips for the E32 series are HERE!
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