BMW F-Series Gear Lever: Difference between revisions

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==General Information==
==General Information==
Much of this information is based on articles by Project Gus <ref>https://www.projectgus.com/2022/06/bmw-f-series-gear-selector-part-one-failures/</ref>. Thank you for reverse engineering!
Much of this information is based on articles by Project Gus <ref>https://www.projectgus.com/tag/bmw-f-series-gws.html</ref>. Thank you for reverse engineering!


===Pinout and Connector===
===Pinout and Connector===
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The Powertrain CAN Bus has a baud rate of 500kBaud.
The Powertrain CAN Bus has a baud rate of 500kBaud.


GWS sends a "heartbeat" to CAN ID 0x55e and more frequent 4-byte GWS status message to CAN ID 0x197:<ref>https://www.projectgus.com/2022/07/bmw-f-series-gear-selector-part-three-success/</ref>
{| class="wikitable"
!Status message Byte
!Meaning
|-
|0
|CRC8 of bytes 1-3 (poly=0x1d, init=0x0, xor=0x53)
|-
|1
|Counter value, 4 bits wide, should change each message, never 0x0F
|-
|2
|Lever position
|-
|3
|Park button (0xC0 normally, 0xD5 if Park is pressed)
|}
Lever position byte values include:
{| class="wikitable"
!Value
!Meaning
|-
|0x0E
|Centre middle
|-
|0x1E
|Pushed "up" (towards front of car)
|-
|0x2E
|Pushed "up" two notches
|-
|0x3E
|Pushed "down" (towards back of car)
|-
|0x4E
|Pushed "down" two notches
|-
|0x7E
|Centre side
|-
|0x5E
|Pushed "side and up"
|-
|0x6E
|Pushed "side and down"
|}
To update the GWS appearance, message ID 0x3FD has to be sent every 50-100ms:
{| class="wikitable"
!Byte
!Meaning
|-
|0
|CRC8 of bytes 1-4 (init=0x0, poly=0x1d, xor=0x53)
|-
|1
|4-bit counter (must increment each message), not 0x0F
|-
|2
|Payload byte 0
|-
|3
|Payload byte 1
|-
|4
|Payload byte 2
|}
Payload byte 0 controls the GWS appearance:
{| class="wikitable"
!Payload byte 0
!Display
|-
|0x00
|Blank gear selection (appears off)
|-
|0x20
|P
|-
|0x80
|D
|-
|0x81
|D, can move to M/S
|-
|0x81
|M/S (if lever moved to side)
|-
|0x40
|R
|-
|0x60
|N
|-
| + 0x08
|To flash the selected gear light
|}
Payload bytes 1 & 2 are ignored by the GWS.
==== CAN Diagnostics ====
BMW UDS uses "extended 11-bit ISO-TP addressing", and the GWS responds to at least some standard UDS requests sent to ID 0x5e (first byte of CAN messages).<ref>https://www.projectgus.com/2022/06/bmw-f-series-gear-selector-part-two-breakthrough/</ref>


==Part Numbers==
==Part Numbers==

Revision as of 11:05, 11 July 2022

General Information

Much of this information is based on articles by Project Gus [1]. Thank you for reverse engineering!

Pinout and Connector

The BMW part number of the connector is 9132576-02, the TE part number is 2-929423-2 but the connector is not freely available from TE [2].

Pinout
Pin Wire Colour Function
1 NC
2 NC
3 Red PT-CAN Low
4 Blue/Red PT-CAN High
5 White/Blue PT-CAN2 Low
6 White/Yellow PT-CAN2 High
7 Green/Brown Enable(?)
8 Brown Ground
9 NC
10 Red/Blue +12V

CAN Bus

The Powertrain CAN Bus has a baud rate of 500kBaud.

GWS sends a "heartbeat" to CAN ID 0x55e and more frequent 4-byte GWS status message to CAN ID 0x197:[3]

Status message Byte Meaning
0 CRC8 of bytes 1-3 (poly=0x1d, init=0x0, xor=0x53)
1 Counter value, 4 bits wide, should change each message, never 0x0F
2 Lever position
3 Park button (0xC0 normally, 0xD5 if Park is pressed)

Lever position byte values include:

Value Meaning
0x0E Centre middle
0x1E Pushed "up" (towards front of car)
0x2E Pushed "up" two notches
0x3E Pushed "down" (towards back of car)
0x4E Pushed "down" two notches
0x7E Centre side
0x5E Pushed "side and up"
0x6E Pushed "side and down"

To update the GWS appearance, message ID 0x3FD has to be sent every 50-100ms:

Byte Meaning
0 CRC8 of bytes 1-4 (init=0x0, poly=0x1d, xor=0x53)
1 4-bit counter (must increment each message), not 0x0F
2 Payload byte 0
3 Payload byte 1
4 Payload byte 2

Payload byte 0 controls the GWS appearance:

Payload byte 0 Display
0x00 Blank gear selection (appears off)
0x20 P
0x80 D
0x81 D, can move to M/S
0x81 M/S (if lever moved to side)
0x40 R
0x60 N
+ 0x08 To flash the selected gear light

Payload bytes 1 & 2 are ignored by the GWS.

CAN Diagnostics

BMW UDS uses "extended 11-bit ISO-TP addressing", and the GWS responds to at least some standard UDS requests sent to ID 0x5e (first byte of CAN messages).[4]

Part Numbers

BMW F-Series Gear Selector (LHD Version) [5]
Normal Version
No LHD/RHD Description Part Number Vehicles Used Status Tested
1 RHD Gear Selector Switch 61 31 9296897 F20, F21, F22, F23

F30, F31, F32, F33, F34, F36

Active
1 RHD Gear Selector Switch 61 31 9291519 Until 06/2013
1 RHD Gear Selector Switch 61 31 9260969 Until 08/2012
1 RHD Gear Selector Switch 61 31 9253652 Until 01/2011
1 LHD Gear Selector Switch 61 31 9296896 F20, F21, F22, F23

F30, F31, F32, F33, F34, F36

Active
1 LHD Gear Selector Switch 61 31 9291517 Until 11/2012
1 LHD Gear Selector Switch 61 31 9260968 Until 06/2013
1 LHD Gear Selector Switch 61 31 9253651 Until 01/2011
Sport Version
No LHD/RHD Description Part Number Vehicles Used Status Tested
2 RHD Gear Selector Switch, Sport 61 31 7950385 Active
2 RHD Gear Selector Switch, Sport 61 31 9296899 F20, F21, F22, F23

F30, F31, F32, F33, F34, F36

Until 05/2018 X
2 RHD Gear Selector Switch, Sport 61 31 9291521 Until 11/2012
2 RHD Gear Selector Switch, Sport 61 31 9260971 Until 07/2012
2 RHD Gear Selector Switch, Sport 61 31 9253654 Until 01/2011
2 LHD Gear Selector Switch, Sport 61 31 7950384 Active
2 LHD Gear Selector Switch, Sport 61 31 9296898 F20, F21, F22, F23

F30, F31, F32, F33, F34, F36

Until 01/2019
2 LHD Gear Selector Switch, Sport 61 31 9291520 Until 06/2013
2 LHD Gear Selector Switch, Sport 61 31 9260970 Until 06/2013
2 LHD Gear Selector Switch, Sport 61 31 9253653 Until 01/2011

References

  1. ↑ https://www.projectgus.com/tag/bmw-f-series-gws.html
  2. ↑ https://www.te.com/usa-en/product-2-929423-2.html
  3. ↑ https://www.projectgus.com/2022/07/bmw-f-series-gear-selector-part-three-success/
  4. ↑ https://www.projectgus.com/2022/06/bmw-f-series-gear-selector-part-two-breakthrough/
  5. ↑ https://www.bmw-etk.info/parts-catalog/prd/BMW/VT/P/F20N/SH/125i/BRA/L/N/2015/05/57228/25/25_0519
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