CAN Bus messages: Difference between revisions

Revision as of 06:19, 11 June 2023

CAN Bus on Hyundai Tiburon operates at a speed of 500kb/s and so does the SIMK43 ECU.

SIMK43 reads the following messages for operation, if the corresponding module is present in car:

SIMK43 sends the following messages:

In addition to that, there are messages that are not used by the ECU, but still present on the CAN Bus:

Refresh Rate: 10ms

Byte 0 - unknown
Byte 1 - TQI_TQR_CAN
Indexed Engine Torque in % of C_TQ_STND (including ASR/MSR/ETCU/LIM/AMT/GEAR intervention)

Calculation = HEX * 0.39
Byte 2 - N_ENG [LSB]
Byte 3 - N_ENG [MSB]
Engine Speed in rpm

Calculation = ((HEX[MSB] * 256) + HEX[LSB]) * 0.15625
Byte 4 - TQI_CAN
Indicated Engine Torque in % of C_TQ_STND (based on PVS, N, AMP, TIA ,TCO, IGA, PUC so ip_tqi_pvs__n__pvs)

Calculation = HEX * 0.39
Byte 5 - TQ_LOSS_CAN
Needs verification

Engine Torque Loss (due to engine friction, AC compressor and electrical power consumption) in % of C_TQ_STND

Calculation = HEX * 0.39
Byte 6 - Bitfield
- Bit 0 - ERR_AMT_CAN
- Bit 1 - ERR_AMT_CAN
Byte 7 - TQI_MAF_CAN
Needs verification

Theorethical Engine Torque in % of C_TQ_STND after charge intervention (based on MAF & IGA so ip_tqi_maf__n__maf)

Calculation = HEX * 0.39

Refresh Rate: 10ms

Byte 0 - unknown
Seems to always be one of 4 values: 0x11, 0x4F, 0x8E, 0xD9
Byte 1 - TEMP_ENG
Engine (Coolant) Temperature in °C

Calculation = (HEX * 0.75) - 48°C

Init: 0xFF

Min: 0x01 (-48°C)

Max: 0xFF (142.5°C)
Byte 2 - AMP_CAN
Ambient Pressure in hPa

Calculation = (HEX * 2) + 598hPa

Init = 0x00

Min = 0x01 (600hPa)

Max = 0xFE (1106hPa)

Error = 0xFF
Byte 3 - unknown
Seems to always be 0x10
Byte 4 - unknown
Seems to always be 0x00
Byte 5 - TPS_CAN
Accelerator Pedal Position in % of PVS_MAX

Calculation = HEX * 0.390625

Init = 0x00

Min = 0x01 (0%)

Max = 0xFE (99.2%)

PVS Error = 0xFF

Values around 10-15% are to be expected for an un-touched pedal
Byte 6 - unknown
Seems to always be 0xFF
Byte 7 - Unused

Refresh Rate: 10ms

Byte 0 - unknown
Seems to have a range of 0xC6 to 0xFE
Byte 1 - FCO[LSB]
Byte 2 - FCO[MSB]
Fuel Consumption. To be verified but there is a correlation between it, rpms and the accelerator pedal position
Byte 3 - unknown
Seems to have a range of 0x7B to 0x8D
Byte 4 - Unused
Byte 5 - Unused
Byte 6 - Unused
Byte 7 - Unused

@@ Line 14: / Line 14: @@
 *[[CAN_Bus_ID_0x1F0_ASC2|ARBID 0x1F0 ASC2 Traction Control]]
+[https://www.csselectronics.com/pages/can-dbc-file-database-intro DBC file] of Tiburon's CAN Bus: [https://drive.google.com/file/d/1eEvwj7wSSmPJuXeJSGywkkAyPGosEbzX/view?usp=sharing Tiburon_SIMK43_ESP.dbc]
 ====DME1 0x316====
 Refresh Rate: 10ms