E46 CAN Bus

The CAN Bus on BMWs E46 chassis operates at a speed of 500kb/s

DME1 0x316

• Byte 0 - Bitfield
  • Bit 0 - LV_SWI_IGK - Ignition Voltage State (0 = off, 1 = on)
  • Bit 1 - LV_F_N_ENG - Crankshaft Sensor State (0 = ok, 1 = error)
  • Bit 2 - LV_ACK_TCS - Traction Control State (0 = no ASC1 CAN frame received for 500ms or unplausible data, 1 = ok)
  • Bit 3 - LV_ERR_GC - Gear Change Error State (0 = gear change not or partly possible, 1 = gear change possible)
  • Bit 4 - SF_TQD
  • Bit 5 - SF_TQD
  • Bit 6 - Unused
  • Bit 7 - LV_F_SUB_TQI - MAF Error State (0 = ok, 1 = error)
• Byte 1 - TQI_TQR_CAN
• Byte 2 - N_ENG - Engine Speed LSB
• Byte 3 - N_ENG - Engine Speed MSB
• Byte 4 - TQI_CAN
• Byte 5 - TQ_LOSS_CAN
• Byte 6 - TQI_MAF_CAN
• Byte 7 - Bitfield
  • Bit 0 - ERR_AMT_CAN
  • Bit 1 - ERR_AMT_CAN

DME4 0x545

• Byte 0 - Bitfield - Dash Lights
  • Bit 0 - Unused
  • Bit 1 - CEL
  • Bit 2 - Unused
  • Bit 3 - CRU_MAIN_SWI
  • Bit 4 - EML
  • Bit 5 - Unused
  • Bit 6 - check gas tank cap
  • Bit 7 - Unused
• Byte 1 - Fuel Consumption LSB
• Byte 2 - Fuel Consumption MSB
• Byte 3 - Bitfield - Oil And Cooling Lights
  • Bit 0 - Oil Level Error LED M5 Cluster
  • Bit 1 - Oil Level Warning LED Every Other Cluster
  • Bit 2 - Oil Level Error LED M5 Cluster
  • Bit 3 - Coolant Overheating Light
  • Bit 4 - M-Cluster Warm-Up LEDs
  • Bit 5 - M-Cluster Warm-Up LEDs
  • Bit 6 - M-Cluster Warm-Up LEDs
  • Bit 7 - Unused
• Byte 4 - Oil Temperature
• Byte 5 -
• Byte 6 - MSS54HP: Oil Level
• Byte 7 - Unused