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Navigation: Wiring information

BMW DCT (wiring)

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The BMW DCT CAN protocol is not yet released, still under testings and development.

BMW DCT related links

BMW DCT Wiring information.

BMW E90/E92 (DCT) EXTRA CAN PROTOCOL.

BMW INPA diagnostic tool.

BMW DCT error codes.

BMW DCT TCU firmware flashing.

DCT clutch relearn.

MTune - DCT Settings.

MTune - DCT Control.

DCT Realtime Data description.

DCT hardware upgrade.

 

Will be updated when released!

 

 

Hardware needed for BMW DCT

 

 

1 - DCT cable harness between MaxxECU and DCT gearbox.

clip1107

MaxxECU cable harness (ID: 2015) for the 335/M3 gearbox, you could make your own, but then you are on your own, we ONLY support our harness.

 

 

2 - BMW DCT/DKG gearbox (GS7D36SG)

clip1110

The actual BMW gearbox...

 

 

3 - BMW M3 shifter

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BMW M3 shifter assembly.

 

 

4 - Drivelogic button

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The BMW drivelogic button.

 

 

5 - Paddle shifters

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Paddle shifters from example Mercedes, part number A 171 267 00 46. Or any other paddle shifters (or buttons on the steering wheel) that "closes" the circuit when pressed.

We do not support the stock BMW paddles.

 

 

Required hardware and inputs

Description

Part no

Note

MaxxECU controlling the engine

All MaxxECUs

Preferable with E-Throttle (but works with regular wire also).

BMW M3 DCT gearbox

GS7D36SG

 

BMW M3 DCT gear selector

61317842102

 

BMW M3 DCT shift knob with boot

25122283705

 

Drivelogic button

61317835039

 

BMW INPA or other diagnostic tool for DCT

BMW INPA

 

Brake pedal/stop light active input.

 

 

Vehicle speed input (wheelspeed sensor).

 

Vehicle speed input is REQUIRED (preferable on UNDRIVEN WHEELS)

Any paddle shifter (which closes a circuit).

 

If you want paddle shifters, which you most likely want...

MaxxECU DCT cable harness.

2015

We ONLY support this cable harness, if you make your own, you are on your own...

DCT transmission fluid

Pentosin FFL-4

Most DCT/DSG oil will most likely work...

 

 

 

X8500 (DCT gearbox connector) pinout (pin side of connector, not wire side)

clip0986

 

Pin

Description

335/M3 Usage

Note

Mechatronix pin

(M4 gearbox function)

1

Paddles signals

Multiplexer input

5.5V (normal), 4.1-3.3V (shift+), 1.6-2.1V (shift-)

3

CAN 2 H

2

-

 


 

 

3

CAN L

 


2

 

4

+12V (wake up)

 

 

10

 

5

Paddles Sensor GND

 

 

5

 

6

-

 

 

 

 

7

-

 

 

 

 

8

-

 

 

 

 

9

-

 


 

 

10

CAN H

 


7

 

11

LIN GWS

LIN backup signal from Gear Selector Switch

 

11

 

12

+12V

Parking lock

 

15

 

13

+12V

Signal parking lock

 

13

 

14

+12V fused 12A

Power supply for DCT


16

 

15

Not used

Park signal to ECU


1

CAN 2 L

16

GND

Chassie GND


14

 

 

 

 

X1708 (Gear Selector Switch)

clip0985                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            

Pin

Description

Usage

Note

1

+12V

Power supply


2

LIN bus

Backup from GWS

 

3

CAN L

 


4

CAN H

 

 

5

+12V

Wake up power

 

6

GND

Chassie GND

 

7

Drivelogic -

 

 

8

Drivelogic +

 

 

 

 

 

X8503 (Drivelogic switch)

Pin

Description

Usage

Note

1

GND

 

 

2

-

 

 

3

Drive logic +

 

 

4

+12V

 

 

5

Drive logic -

 

 

6

-

 

 

 

 

 

12-pin GT150 connector

Pin

Description

Usage

Note

A

+12V power supply

Must be powered at the same time as MaxxECU

 

B

-

 

 

C

CAN H

To MaxxECU CAN H

 

D

Paddle UP shift

Paddle GND this input to trigger UP SHIFT

Do NOT put any other ground than the Paddle GND to this input!

E

Park signal

 

 

F

-

 

 

G

GND

To chassie/engine GND


H

Paddle GND

 

ONLY to be used as the paddle shifter ground point, NOTHING ELSE!!!

J

CAN L

To MaxxECU CAN L


K

Paddle DOWN shift

Paddle GND this input to trigger DOWN SHIFT

Do NOT put any other ground than the Paddle GND to this input!

L

-

 


M

-