CAN Bus ID 0x43F EGS1

EGS1 0x43F

Refresh Rate: 10ms

• Byte 0 - Bitfield
  • Bit 0 - GEAR_INFO [0]
  • Bit 1 - GEAR_INFO [1]
  • Bit 2 - GEAR_INFO [2]

    Currently Active Gear

  • Bit 3 - LV_GS - Gear Shift Active
  • Bit 4 - OBD_F - OBD-relevant DTC Active
  • Bit 5 - LV_GP_CAN - Gearbox Protection
  • Bit 6 - S_KUPPL / STATE_CC - State Converter Clutch
  • Bit 7 - S_KUPPL / STATE_CC - State Converter Clutch
• Byte 1 - Bitfield
  • Bit 0 - GEAR_SEL_DISP [0]
  • Bit 1 - GEAR_SEL_DISP [1]
  • Bit 2 - GEAR_SEL_DISP [2]
  • Bit 3 - GEAR_SEL_DISP [3]

    Gear Lever Position

  • Bit 4 - STATE_ETCU_OBD [0]
  • Bit 5 - STATE_ETCU_OBD [1]
  • Bit 6 - STATE_ETCU_OBD [2]
  • Bit 7 - STATE_ETCU_OBD [3]

    OBD-Status Transmission Control Unit

    0x00 = MIL off

    0x02 = MIL off

    0x04 = MIL on

    0x06 = MIL on

    0x08 = MIL FLL

    0x0A = MIL FLL

    0x0C = Idle

    0x0E = INI Value

    0x0F = invalid value

• Byte 2 - Bitfield
  • Bit 0 - SMG_WHL_ANZ - SMG-Wählhebelstellung
  • Bit 1 - SMG_WHL_ANZ - SMG-Wählhebelstellung
  • Bit 2 - Unused
  • Bit 3 - Unused
  • Bit 4 - Unused
  • Bit 5 - PRG_INF_ANZ - Programminformationsanzeige
  • Bit 6 - PRG_INF_ANZ - Programminformationsanzeige
  • Bit 7 - PRG_INF_ANZ - Programminformationsanzeige
• Byte 3 - TQI_ETCU_CAN

  TCU Indexed Relative Torque Intervention

  The TCU can require a reduced torque for gear changing. The value of the torque reduction is transferred as TQI_ETCU_CAN, whereby the value 0xFF means no torque reduction and the value 0x00 means full torque reduction.

  During the gear change, the resulting ignition angle is applied without limiting gradient.

  At the start of gear changing (TQI_ETCU_CAN from CAN is less than FFH) a time counter starts. If TQI_ETCU_CAN does not become 0xFF again before expiry of the time C_T_MAX_TQR_ETCU_DIAG, this is assessed as an error and TQI_ETCU_CAN is ignored up to the next StG initialization.

  If a gear change cannot be brought to an end, e.g. on failure of the CAN message or due to timeout C_T_MAX_TQR_ETCU_DIAG, the last validly recognized value TQI_ETCU_CAN is reset to the neutral value 0xFF with the speed C_TQI_CAN_LGRD_DIAG.

• Byte 4 - N_ABTR - Abtriebsdrehzahl
• Byte 5 - Bitfield
  • Bit 0 - L_GS - Störanzeige
  • Bit 1 - L_GS - Störanzeige
  • Bit 2 - TCU_TYP - Steuergerätetyp EGS/SMG
  • Bit 3 - S_EGW - Schalter Getriebeölthermostat
  • Bit 4 - LV_TOIL_GEAR_CAN - Schalter Getriebeölübertemperatur
  • Bit 5 - Unused
  • Bit 6 - DT_REINF - Drivetrain Reinforcement
  • Bit 7 - DT_REINF - Drivetrain Reinforcement
• Byte 6 - DT_REINF - Drivetrain Reinforcement
• Byte 7 - TQ_CONV_CAN - Momentaufnahme Getriebe

SMG2 0x43F

The SMG2 CAN message for the E46 chassis CAN is sent from the MSS54 ECU instead of the TCU.

MSS54 has a secondary CAN bus that is completely seperated from the rest of the powertrain and acts as a gateway for the SMG2 unit.

Refresh Rate: 10ms

• Byte 0 - Bitfield
  • Bit 0 - DESIRED_GEAR [0]
  • Bit 1 - DESIRED_GEAR [1]
  • Bit 2 - DESIRED_GEAR [2]

    Desired Gear After Shift

    0 = Neutral

    1 = 1st Gear

    2 = 2nd Gear

    3 = 3rd Gear

    4 = 4th Gear

    5 = 5th Gear

    6 = 6th Gear

    7 = Reverse

  • Bit 3 - LV_GS

    Gear Shift Active

    0 = no

    1 = yes

  • Bit 4 - Unused
  • Bit 5 - GEAR_SEL_AUTO

    Gear Selector Auto Position

    0 = no

    1 = yes

  • Bit 6 - STATE_CLUTCH [0]
  • Bit 7 - STATE_CLUTCH [1]

    State Converter Clutch

    0 = opened

    1 = closed

    2 = opening

    3 = closing

• Byte 1 - Bitfield
  • Bit 0 - GEAR_INFO [0]
  • Bit 1 - GEAR_INFO [1]
  • Bit 2 - GEAR_INFO [2]
  • Bit 3 - GEAR_INFO [3]

    Current Gear Display Information

    0 = Clear Screen

    1 = 1st Gear

    2 = 2nd Gear

    3 = 3rd Gear

    4 = 4th Gear

    5 = Auto / D

    6 = Neutral

    7 = Reverse

    9 = 5th Gear

    10 = 6th Gear

  • Bit 4 - Unused
  • Bit 5 - Unused
  • Bit 6 - Unused
  • Bit 7 - Unused
• Byte 2 - Bitfield
  • Bit 0 - GEAL_SEL [0]
  • Bit 1 - GEAL_SEL [1]
  • Bit 2 - GEAL_SEL [2]
  • Bit 3 - GEAL_SEL [3]

    Gear Selector Indicator

    0 = Display Off

    1 = "0"

    2 = "R"

    3 = "A+"

    4 = "A-"

    5 = "A+/-"

    6 = "S+"

    7 = "S+"

    8 = "S+/-"

    9 = "+"

    10 = "-"

    11 = "+/-"

    12 = "A"

    15 = Display Segment Test

  • Bit 4 - PRG_INF_ANZ [0]
  • Bit 5 - PRG_INF_ANZ [1]
  • Bit 6 - PRG_INF_ANZ [2]
  • Bit 7 - PRG_INF_ANZ [3]

    Drive Logic Speed Indicator

    0 = Drive Logic Indicator Hidden

    1 = DSC Off Frame Extension Only

    2 = Standard Frame and Speed 1

    3 = Extended Frame and Speed 1

    4 = Standard Frame and Speed 2

    5 = Extended Frame and Speed 2

    6 = Standard Frame and Speed 3

    7 = Extended Frame and Speed 3

    8 = Standard Frame and Speed 4

    9 = Extended Frame and Speed 4

    10 = Standard Frame and Speed 5

    11 = Extended Frame and Speed 5

    12 = Standard Frame and Speed 6

    13 = Extended Frame and Speed 6

    14 = unused

    15 = unused

• Byte 3 - CHKSM_GEAR_INFO

  Checksum and life counter for current gear shown in cluster display

  There is a COUNTER with an initialization value of 0x00

  Calculation:

  CHKSM_GEAR_INFO = Xor COUNTER, GEAR_INFO

  CHKSM_GEAR_INFO = Negate CHKSM_GEAR_INFO

  CHKSM_GEAR_INFO = And CHKSM_GEAR_INFO , 0x0F

  CHKSM_GEAR_INFO = Lsh CHKSM_GEAR_INFO , 4

  CHKSM_GEAR_INFO = Or CHKSM_GEAR_INFO , GEAR_INFO

  COUNTER is incremented every time after the CAN message has been sent

• Byte 4 - LNG_ACC

  Longitudial Acceleration

  Calculation: (HEX / 10) - 12.7m/s²

  Min: -12.7m/s²

  Max: 12.7m/s²

• Byte 5 - Bitfield
  • Bit 0 - L_GS [0]
  • Bit 1 - L_GS [1]

    SMG Error State

    0 = No Error

    3 = Error Active (Gear Of Death)

  • Bit 2 - Unused (Always 1)
  • Bit 3 - TC_ACT

    Traction Control Intervention

    0 = no

    1 = yes

  • Bit 4 - Unused
  • Bit 5 - GONG
  • Bit 6 - DT_REINF [0]
  • Bit 7 - DT_REINF [1]
• Byte 6 - DT_REINF [2-9]

  Torque Factor On Wheels

  Calculation = HEX / 2.56

  TQ_CLU / TQ_ENG * SMG_I_HA * SMG_I_GEAR / SMG_R_RAD_DYN

• Byte 7 - TQ_CLU

  Torque On Clutch