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Thread: Transmission case sleeves, ZF 4HP22/24 EH valve body questions

  1. #451
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    I assume that should be the terminal numbers, not the gear number.
    Shogun tricks and tips for the E32 series http://twrite.org/shogunnew/topmenu.html

  2. #452
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    Yes. But also terminal number 3 at gear second and on matrix display number 2 not geting power. There should be at least 10v. Transmission Range Switch terminal 8 wire BL/BR gives 12 volts at L1 and L2 whitch is connected to TCU pin 18. TCU pin 28 connected to transmission Range Switch terminal 3 whitch is L2 second gear 0 volt ?
    Terminal 2 is third gear L3 it gives 12v.
    Last edited by Annddrriy; 05-23-2022 at 08:08 PM. Reason: L2 0 volt

  3. #453
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    Maybe transmission TCU pin 28 internal has a problem or the problem could be in Range Switch ?

  4. #454
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    E-7 Late version TCU pin 28 has Shift Lever Position Park and Neutral. E-7 Early version has Shift lever Position 2nd Gear. What should be in E-9 version Second Gear or Park and Neuntral ? Maybe problem in the cluster I still did not check wiring in cluster because when I connect the scanner the scanner fix the problem but revoving E and M from the matrix. I did check which solenoids is on when scanner connected while drive test there is all solenoid is OFF except pressure regulator solenoid is ON. Looks like vehicle start moving from 4th gear and forward gear also is ON. Or maybe starts moving from 3rd gear then pressure regulator making adjustment on RPM and vehicle speed there was 100km/h at 2100RPM/1mn without any gear shifts it was moving like on M mode.
    Last edited by Annddrriy; 05-23-2022 at 08:45 PM. Reason: Position 2nd Gear

  5. #455
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    It doesn't matter if your car has an E7 or E9 trans - the shift matrix layout is the same. Using switches L1 to L4, the gear selection is sent to the TCM as a sort of code. So second gear manual is 1000. You will note that L2 is only live in park and neutral. That is so the TCM knows the engine is out of gear.

    If you ever owned a CB radio with a mechanical channel changer, it worked in the same way. But instead of producing just seven codes, it would produce forty

  6. #456
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    E-7 Early version TCU pin 28 to 5 has at least 10 volts and E-7 Late version also has TCU pin 28 to 5 has less than 1 volt. E-9 version TCU pin 4 has a neutral and E-7 version TCU pin 28 also has a neutral. When you exchange TCU pins 28 with 29 you have on matrix display E mode onto M mode the vihecle moves from 4th gear but no reverse gear and when you put gear selector to position neutral on dashboard matrix display S mode.

  7. #457
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    I think L2 should live in second not in neutral.

  8. #458
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    For an example if your friend has a CB radio and you both talking between on channel 5 but his CB has on the display channel 2 . Why channel 2 and you are on the channel 5 and you hearing each other because depends on programming. His CB radio programmed channel 2 as channel 5. Why he did like that you can ask programmer

  9. #459
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    If L2 live at neutral when second gear needs 12v power for shifting hydraulically and electronically but power lives at neutral that time then shifting going on by speed sensor electronically only but not hydraulically by shift solenoid. Is that make sense ?

  10. #460
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    Quote Originally Posted by Annddrriy View Post
    If L2 live at neutral when second gear needs 12v power for shifting hydraulically and electronically but power lives at neutral that time then shifting going on by speed sensor electronically only but not hydraulically by shift solenoid. Is that make sense ?
    L2 does not power anything in the valve body. When the ignition is on, the solenoids receive continuous live and are activated when grounded by the TCM. The function of L1-L4 is to tell the TCM which gear is selected.

  11. #461
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    Should L2 terminal power with at least 10 volts at pin 28 of TCU when ignition is ON and gear selector is set to position 2 ?
    Last edited by Annddrriy; 05-25-2022 at 01:11 PM. Reason: Terminal L2

  12. #462
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    Should pin 31 of TCU power with 12v L2 terminal when ignition is ON and gear selector is set to position 2 ?
    Last edited by Annddrriy; 05-25-2022 at 01:13 PM. Reason: Terminal L2

  13. #463
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    Power to switches L1-L4 comes from fuse 17, not pin 31 of the TCM. With the ignition on and the gear lever in manual 2, L1 will provide power to TCM pin 18.
    Last edited by whiskychaser; 05-27-2022 at 09:03 AM.

  14. #464
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    How to understand E-7 Early version TCU pin 31 has power 12v and E-7 Late version hasn't power ?

  15. #465
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    How to make it missing copper road track in Range Selector Switch to get powered with 12v L2 terminal ?
    Last edited by Annddrriy; 05-25-2022 at 03:05 PM. Reason: L2 terminal

  16. #466
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    Quote Originally Posted by Annddrriy View Post
    How to understand E-7 Early version TCU pin 31 has power 12v and E-7 Late version hasn't power ?
    If you have not got the appropriate diagrams, you are going to have to find out if that is an input to or output from pin 31. Then trace the wiring

    Quote Originally Posted by Annddrriy View Post
    How to make it missing copper road track in Range Selector Switch to get powered with 12v L2 terminal ?
    If it is so badly damaged that copper track is missing, the switch needs to be replaced.

  17. #467
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    What do you think from your perspective power should go to TCU pin 31 or should coming out from TCU pin 31 ? Thanks in advance !

  18. #468
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    BMW and Bentley wiring diagrams do not show pin 31 of the TCM being used until 1991 when it is grounded by the brake light switch.

  19. #469
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    I mistaken with pin number that is 28 pin. Should pin 28 of TCU power with 12v L2 terminal when ignition is ON and gear selector is set to position 2 or power should coming out from TCU pin 28 and power L2 terminal 3 at selector position to second gear ?
    Last edited by Annddrriy; 05-26-2022 at 05:12 PM. Reason: Pin 28 power L2 or L2 power pin 28

  20. #470
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    Pin 28 is an input, not an output. It works as I mentioned above
    Last edited by whiskychaser; 05-27-2022 at 09:04 AM.

  21. #471
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    Yes my mistake. One wire from fuse connect to all 4 terminals L1L2L3L4. L2 is terminal 3 at selector position switch which is not getting 12v power when gear selector is set to position 2 that is E-7 Early version but in Late version shows not powered which diagram should be correct ?
    Last edited by Annddrriy; 05-26-2022 at 08:24 PM. Reason: E-7 Early version L2 terminal is powered at gear selector in position 2 and in E-7 Late version is not powered.

  22. #472
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    Power to switches L1-L4 comes from fuse 17 with the ignition on and the gear lever in manual 2, L2 will provide power to TCM pin 28 if L2 will not provide power to TCM pin 28 what will happen then ?
    Last edited by Annddrriy; 05-26-2022 at 08:29 PM. Reason: L2 provide power to TCM pin 28

  23. #473
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    The shift matrix is the same from 1987 through 1992. The diagrams confirm it. If you have got hold of a switch from a N American E34 with an A4S310R trans, the matrix will still be the same. But L2 will be wired to pin 26 of the TCM and not pin 28. If you are using the correct TCM for your car and there is no live to pin 18 when you select second manual, the TCM will not know which gear you are requesting and it is likely to throw TRANS PROGRAM.
    Last edited by whiskychaser; 05-27-2022 at 09:18 AM.

  24. #474
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    29 is ok with power at selector position to 3rd gear. Why TCU pin 28 need for ?

  25. #475
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    Quote Originally Posted by Annddrriy View Post
    29 is ok with power at selector position to 3rd gear. Why TCU pin 28 need for ?
    L3, which supplies pin 29, is the only switch which is closed when manual third gear is selected. Check out the matrix table
    matrix.jpg

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