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README.md

E65 Reverse Engineering

Reverse engineering on PT-CAN and Local-CAN of BMW E65/E66

The main goal of this project is to replace the original engine control (2x DME) with rusEFI Proteus.

The other goal is to find the CAN messages needed for the operation of the installed automatic transmission (ZF 6HP26) to be able to run the transmission stand-alone...

BMW Standard Tools installation HowTo

Messages needed for the transmission operation (source, page 80)

Signals Transmitter Receiver CAN ID
Transmission selector switch SZL EGS 0x192
Terminal status CAS EGS 0x130
Central locking CAS EGS 0x2FC
Transmission data EGS CAS
Engine data DME / DDE EGS 0x1D0
Wheel rotating speeds DSC EGS 0x0CE
Braking request EMF EGS
Transmission data display EGS Instr. cluster
Check Control message EGS Instr. cluster
Torque request EGS DME 0x0B5
Operating voltage Power Module EGS 0x3B4
Stationary consumers EGS Power Module

CAN-IDs in PT-CAN BMW E65 with MED 9.2.1

Message name Transmitter CAN ID Message status
Torque 1 DME1 / DDE1 0x0A8 fully decoded
Torque 2 DME1 / DDE1 0x0A9 fully decoded
Torque 3 DME1 / DDE1 0x0AA fully decoded
Retard request ACC ACC 0x0AD TBD, partially decoded
Torque request EGS EGS 0x0B5 fully decoded
Torque request DSC DSC 0x0B6 fully decoded
Torque request ACC ACC 0x0B7 fully decoded
Transmission data 1 EGS 0x0BA fully decoded
Steering wheel angle SZL 0x0C4 TBD, partially decoded
Yaw request 2 0x0CA TBD
Yaw answer 2 0x0CB TBD
Wheel speed DSC 0x0CE fully decoded
Terminal status CAS 0x130 fully decoded
Display ACC ACC 0x190 TBD
Operation transmission selector switch SZL 0x192 TBD, partially decoded
Operation cruise control / ACC SZL 0x194 fully decoded
Status DSC DSC 0x19E fully decoded
Speed DSC 0x1A0 fully decoded
Transmission data 2 EGS 0x1A2 fully decoded
Status ARS ARS 0x1AC fully decoded
Status instrument cluster Kombi 0x1B4 fully decoded
Engine data 1 DME 0x1D0 fully decoded
Display gearbox data EGS 0x1D2 TBD
Speed cruise control DME 0x200 TBD, partially decoded
Damper current EDC-K 0x322 TBD
Status damper programm EDC-K 0x326 TBD, partially decoded
Mileage Kombi 0x330 fully decoded
Display RPM range DME 0x332 fully decoded
Power management charge voltage PM 0x334 fully decoded
Vehicle identification number CAS 0x380 fully decoded
Electronic engine oil dipstick DME 0x381 TBD, partially decoded
Vehicle type CAS 0x388 TBD, partially decoded
Starting speed DME 0x38E fully decoded
Operation chasis 0x398 TBD
Power management battery voltage PM 0x3B4 fully decoded

Module names:

  • ACC: active cruise control
  • CC: cruise control
  • DME: digital motor electronic (gasoline engine)
  • DDE: digital diesel electronic (diesel engine)
  • EGS: electronic transmission control
  • CAS: car access system
  • DSC: dynamic stability control
  • SZL: switch center steering wheel
  • EMF: electromechanical parking brake
  • Kombi: instrument cluster
  • PM: power module
  • EDC-K: electronical damper control

Some interesting links: