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Siemens MS45 CAN Bus (CAN11h): Difference between revisions
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<div style="float:right;">__TOC__</div> | |||
MS45 can operate in two different CAN bus modes. CAN11h and BN2000. This page describes CAN11h which is also used in MS43/MS42 and compatible with those. CAN11h works in 500kb/s baud rate. | |||
Siemens MS45 reads the following messages for operation, if the corresponding module is present in car: | |||
*Messagebox 1: [[CAN_Bus_ID_0x43F_EGS1|ARBID 0x43F EGS1 Automatic Transmission]] | |||
*Messagebox 2: [[CAN_Bus_ID_0x613_ICL2|ARBID 0x613 ICL2 Instrument Cluster]] | |||
*Messagebox 3: [[CAN_Bus_ID_0x615_ICL3|ARBID 0x615 ICL3 Instrument Cluster]] | |||
*Messagebox 4: [[CAN_Bus_ID_0x153_ASC1|ARBID 0x153 ASC1 Traction Control]] | |||
*Messagebox 5: [[CAN_Bus_ID_0x1F3_ASC3|ARBID 0x1F3 ASC3 Traction Control]] | |||
*Messagebox 6: [[CAN_Bus_ID_0x43D_AMT1|ARBID 0x43D AMT1 Automatic Manual Transmission]] | |||
*Messagebox 7: [[CAN_Bus_ID_0x1F5_LWS1|ARBID 0x1F5 LWS1 Steering Angle Sensor]] | |||
Siemens MS45 sends the following messages: | |||
*Messagebox B: [[Siemens_MS43_CAN_Bus#DME3_0x338|ARBID 0x338 DME3 Engine Control Unit]] (Alpina Roadster only) | |||
*Messagebox C: [[Siemens_MS43_CAN_Bus#DME4_0x545|ARBID 0x545 DME4 Engine Control Unit]] | |||
*Messagebox D: [[Siemens_MS43_CAN_Bus#DME2_0x329|ARBID 0x329 DME2 Engine Control Unit]] | |||
*Messagebox E: [[Siemens_MS43_CAN_Bus#DME1_0x316|ARBID 0x316 DME1 Engine Control Unit]] | |||
In addition to that, there are several messages that are not used by the ECU, but still present on the CAN Bus: | |||
*[[CAN_Bus_ID_0x1F0_ASC2|ARBID 0x1F0 ASC2 Traction Control]] | |||
*[[CAN_Bus_ID_0x1F8_ASC4|ARBID 0x1F8 ASC4 Traction Control]] | |||
*[[CAN_Bus_ID_0x445_TXU1|ARBID 0x445 TXU1 Transfer Case Unit]] | |||
*[[CAN_Bus_ID_0x610_ICL1|ARBID 0x610 ICL1 Instrument Cluster]] | |||
====DME1 0x316==== | |||
Refresh Rate: 10ms | |||
*'''Byte 0 - Bitfield''' | |||
**'''Bit 0 - LV_SWI_IGK''' | |||
**:Ignition Key Voltage State | |||
**:0 = terminal 15 off detected | |||
**:1 = terminal 15 on detected | |||
**'''Bit 1 - LV_F_N_ENG''' | |||
**:Crankshaft Sensor State | |||
**:0 = no CRK error present | |||
**:1 = CRK error present | |||
**'''Bit 2 - LV_ACK_TCS''' | |||
**:Traction Control State | |||
**:0 = either ASC1 was not received within the last 500 ms or it contains a plausibility error | |||
**:1 = the ASC message ASC1 was received within the last 500 ms and contains no plausibility errors of the requirements TQI_ASR_CAN / TQI_MSR_CAN | |||
**'''Bit 3 - LV_ERR_GC''' | |||
**:Gear Change Error State | |||
**:0 = gear change not or partly possible | |||
**:1 = gear change possible | |||
**'''Bit 4 - SF_TQD [0]''' | |||
**'''Bit 5 - SF_TQD [0]''' | |||
**:Charge Intervention State | |||
**:0 = the required intervention can be performed completely or if there is no ASC requirement. | |||
**:1 = the required intervention cannot be performed completely because the IGA retard limit is reached. | |||
**:2 = the required intervention cannot be performed completely because the charge actuators are fully closed (this case is not possible with MTC without break-away mechanism) | |||
**:3 = "limited vehicle dynamics" is active (MTC/ISA error) | |||
**'''Bit 6 - Unused''' | |||
**'''Bit 7 - LV_F_SUB_TQI''' | |||
**:MAF Error State | |||
**:0 = MAF ok | |||
**:1 = MAF error present | |||
*'''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''' | |||
*: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 6 - ERR_AMT_CAN''' | |||
**'''Bit 7 - ERR_AMT_CAN''' | |||
*'''Byte 7 - TQI_MAF_CAN''' | |||
*: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 | |||
====DME2 0x329==== | |||
Refresh Rate: 10ms | |||
*'''Byte 0 - Multiplexed Information''' | |||
**'''Bit 0''' - MUX_INFO [0] | |||
**'''Bit 1''' - MUX_INFO [1] | |||
**'''Bit 2''' - MUX_INFO [2] | |||
**'''Bit 3''' - MUX_INFO [3] | |||
**'''Bit 4''' - MUX_INFO [4] | |||
**'''Bit 5''' - MUX_INFO [5] | |||
**:CAN_LEVEL = CAN bus function level. This is always 0x11 for MS43 | |||
**:OBD_STEUER = STATE_DIAG_GS (Status of GS diagnosis for feedback to gearbox) | |||
**:MD_NORM = Refactored C_TQ_STND from 0x3FF (0-1023Nm) to 0x3F (0-1008Nm) with decreased resolution of 16Nm | |||
**'''Bit 6''' - MUX_CODE [0] | |||
**'''Bit 7''' - MUX_CODE [1] | |||
**: 0 = CAN_LEVEL | |||
**: 2 = OBD_STEUER | |||
**: 3 = MD_NORM | |||
*'''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 - Bitfield''' | |||
**'''Bit 0 - LV_SWI_CLU''' | |||
**:Clutch Switch State | |||
**:0 = released | |||
**:1 = depressed | |||
**'''Bit 1 - LV_LEVEL_IS''' | |||
**:Idle Regulator State | |||
**:0 = idle above threshold | |||
**:1 = idle below threshold | |||
**'''Bit 2 - LV_ACK_CRU_AD_ECU''' | |||
**:Acknowledge of ACC1 CAN Message | |||
**:0 = nACK | |||
**:1 = ACK | |||
**'''Bit 3 - LV_ERU_CAN''' | |||
**:Engine Running State | |||
**:0 = engine stopped | |||
**:1 = engine running | |||
**'''Bit 4 - (STATE_CRU_CAN)??? | |||
**'''Bit 5 - STATE_MSW_CAN [0]''' | |||
**'''Bit 6 - STATE_MSW_CAN [1]''' | |||
**'''Bit 7 - STATE_MSW_CAN [2]''' | |||
**:0 = No Button Pressed (Init Value) | |||
**:1 = Set / Acceleration (tip-up) | |||
**:2 = Deceleration (tip-down) | |||
**:3 = Resume | |||
**:4 = Deactivate (I/O) | |||
**:7 = Error Condition | |||
*'''Byte 4 - TPS_VIRT_CRU_CAN''' | |||
*:Calculation = HEX * 0.390625 | |||
*'''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 | |||
*'''Byte 6 - Bitfield''' | |||
**'''Bit 0 - LV_BS''' | |||
**:Brake Switch State | |||
**:0 = brake not actuated | |||
**:1 = brake actuated | |||
**'''Bit 1 - LV_ERR_BS''' | |||
**:Brake Switch System State | |||
**:0 = brake switch system OK | |||
**:1 = brake switch system faulty | |||
**'''Bit 2 - LV_KD_CAN''' | |||
**:Kick Down State | |||
**:0 = kick down not active | |||
**:1 = kick down active | |||
**'''Bit 3 - STATE_CRU_CAN [0]''' | |||
**'''Bit 4 - STATE_CRU_CAN [1]''' | |||
**'''Bit 5 - STATE_CRU_CAN [2]''' | |||
**:0 = LV_CRU_ACT = 0 | |||
**:1 = LV_CRU_ACT = 1, constant drive (or tip-up / tip-down) | |||
**:3 = LV_CRU_ACT = 1, resume | |||
**:5 = LV_CRU_ACT = 1, set / acceleration | |||
**:7 = LV_CRU_ACT = 1, deceleration | |||
**'''Bit 6 - REQ_SHIFTLOCK [0]''' | |||
**'''Bit 7 - REQ_SHIFTLOCK [1]''' | |||
**:0 = no actuation is active | |||
**:3 = actuation ISA, MTC or N_SP_IS is active | |||
*'''Byte 7 - Unused''' | |||
====DME3 0x338==== | |||
Refresh Rate: 1000ms and at signal change | |||
*'''Byte 0''' - Unused | |||
*'''Byte 1''' - Unused | |||
*'''Byte 2 - STATE_SOF_CAN''' | |||
*:Sport Button Status | |||
*:0 = Sport Button On (requested by SMG) | |||
*:1 = Sport Button Off | |||
*:2 = Sport Button On | |||
*:3 = Sport Button Error | |||
*:Init: 0x01 | |||
*'''Byte 3''' - Unused | |||
*'''Byte 4''' - Unused | |||
*'''Byte 5''' - Unused | |||
*'''Byte 6''' - Unused | |||
*'''Byte 7''' - Unused | |||
====DME4 0x545==== | |||
Refresh Rate: 10ms | |||
*'''Byte 0 - Bitfield''' | |||
**'''Bit 0''' - Unused | |||
**'''Bit 1''' - LV_MIL - Check Engine Light | |||
**'''Bit 2''' - Unused | |||
**'''Bit 3''' - LV_MAIN_SWI_CRU - CRU_MAIN_SWI | |||
**'''Bit 4''' - LV_ETC_DIAG - EML Light | |||
**'''Bit 5''' - Unused | |||
**'''Bit 6''' - LV_FUC_CAN - Fuel Tank Cap Light | |||
**'''Bit 7''' - Unused | |||
*'''Byte 1 - FCO[LSB]''' | |||
*'''Byte 2 - FCO[MSB]''' | |||
*:Fuel Consumption | |||
*'''Byte 3 - Bitfield''' | |||
**'''Bit 0''' - Oil Level Indicator LED - Oil consumption | |||
**'''Bit 1''' - Oil Level Indicator LED - Oil loss | |||
**'''Bit 2''' - Oil Level Indicator LED - Sensor malfunction | |||
**'''Bit 3''' - LV_TEMP_ENG - Coolant Overheating Light (c_tco_tmot_sta) | |||
**'''Bit 4''' - M-Cluster Warm-Up LEDs | |||
**'''Bit 5''' - M-Cluster Warm-Up LEDs | |||
**'''Bit 6''' - M-Cluster Warm-Up LEDs | |||
**'''Bit 7''' - Upshift indicator | |||
*'''Byte 4 - TOIL_CAN''' | |||
*:Oil Temperature in °C | |||
*:Calculation = HEX - 48°C | |||
*:Min: 0x00 (-48°C) | |||
*:Max: 0xFE (206°C) | |||
*'''Byte 5 - Bitfield''' | |||
**'''Bit 0''' - Battery Chargelight (Alpina Roadster Only) | |||
**'''Bit 1''' - Unused | |||
**'''Bit 2''' - Unused | |||
**'''Bit 3''' - Unused | |||
**'''Bit 4''' - Unused | |||
**'''Bit 5''' - Unused | |||
**'''Bit 6''' - Unused | |||
**'''Bit 7''' - Unused | |||
*'''Byte 6''' - Oil Level (MSS54HP only) | |||
*:Calculation = (HEX - 158) / 10L | |||
*:Min: 0x80 || 0xC0 (-3.0L) | |||
*:Max: 0xBE || 0xFE (+3.2L) | |||
*'''Byte 7 - Bitfield''' | |||
**'''Bit 0''' - State Tire Pressure (MSS54 only) | |||
**'''Bit 1''' - Unused | |||
**'''Bit 2''' - Unused | |||
**'''Bit 3''' - Unused | |||
**'''Bit 4''' - Unused | |||
**'''Bit 5''' - Unused | |||
**'''Bit 6''' - Unused | |||
**'''Bit 7''' - Status Engine Oil Pressure Low |
Revision as of 06:32, 23 April 2024
MS45 can operate in two different CAN bus modes. CAN11h and BN2000. This page describes CAN11h which is also used in MS43/MS42 and compatible with those. CAN11h works in 500kb/s baud rate.
Siemens MS45 reads the following messages for operation, if the corresponding module is present in car:
- Messagebox 1: ARBID 0x43F EGS1 Automatic Transmission
- Messagebox 2: ARBID 0x613 ICL2 Instrument Cluster
- Messagebox 3: ARBID 0x615 ICL3 Instrument Cluster
- Messagebox 4: ARBID 0x153 ASC1 Traction Control
- Messagebox 5: ARBID 0x1F3 ASC3 Traction Control
- Messagebox 6: ARBID 0x43D AMT1 Automatic Manual Transmission
- Messagebox 7: ARBID 0x1F5 LWS1 Steering Angle Sensor
Siemens MS45 sends the following messages:
- Messagebox B: ARBID 0x338 DME3 Engine Control Unit (Alpina Roadster only)
- Messagebox C: ARBID 0x545 DME4 Engine Control Unit
- Messagebox D: ARBID 0x329 DME2 Engine Control Unit
- Messagebox E: ARBID 0x316 DME1 Engine Control Unit
In addition to that, there are several messages that are not used by the ECU, but still present on the CAN Bus:
- ARBID 0x1F0 ASC2 Traction Control
- ARBID 0x1F8 ASC4 Traction Control
- ARBID 0x445 TXU1 Transfer Case Unit
- ARBID 0x610 ICL1 Instrument Cluster
DME1 0x316
Refresh Rate: 10ms
- Byte 0 - Bitfield
- Bit 0 - LV_SWI_IGK
- Ignition Key Voltage State
- 0 = terminal 15 off detected
- 1 = terminal 15 on detected
- Bit 1 - LV_F_N_ENG
- Crankshaft Sensor State
- 0 = no CRK error present
- 1 = CRK error present
- Bit 2 - LV_ACK_TCS
- Traction Control State
- 0 = either ASC1 was not received within the last 500 ms or it contains a plausibility error
- 1 = the ASC message ASC1 was received within the last 500 ms and contains no plausibility errors of the requirements TQI_ASR_CAN / TQI_MSR_CAN
- Bit 3 - LV_ERR_GC
- Gear Change Error State
- 0 = gear change not or partly possible
- 1 = gear change possible
- Bit 4 - SF_TQD [0]
- Bit 5 - SF_TQD [0]
- Charge Intervention State
- 0 = the required intervention can be performed completely or if there is no ASC requirement.
- 1 = the required intervention cannot be performed completely because the IGA retard limit is reached.
- 2 = the required intervention cannot be performed completely because the charge actuators are fully closed (this case is not possible with MTC without break-away mechanism)
- 3 = "limited vehicle dynamics" is active (MTC/ISA error)
- Bit 6 - Unused
- Bit 7 - LV_F_SUB_TQI
- MAF Error State
- 0 = MAF ok
- 1 = MAF error present
- Bit 0 - LV_SWI_IGK
- 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
- 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 6 - ERR_AMT_CAN
- Bit 7 - ERR_AMT_CAN
- Byte 7 - TQI_MAF_CAN
- 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
DME2 0x329
Refresh Rate: 10ms
- Byte 0 - Multiplexed Information
- Bit 0 - MUX_INFO [0]
- Bit 1 - MUX_INFO [1]
- Bit 2 - MUX_INFO [2]
- Bit 3 - MUX_INFO [3]
- Bit 4 - MUX_INFO [4]
- Bit 5 - MUX_INFO [5]
- CAN_LEVEL = CAN bus function level. This is always 0x11 for MS43
- OBD_STEUER = STATE_DIAG_GS (Status of GS diagnosis for feedback to gearbox)
- MD_NORM = Refactored C_TQ_STND from 0x3FF (0-1023Nm) to 0x3F (0-1008Nm) with decreased resolution of 16Nm
- Bit 6 - MUX_CODE [0]
- Bit 7 - MUX_CODE [1]
- 0 = CAN_LEVEL
- 2 = OBD_STEUER
- 3 = MD_NORM
- 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 - Bitfield
- Bit 0 - LV_SWI_CLU
- Clutch Switch State
- 0 = released
- 1 = depressed
- Bit 1 - LV_LEVEL_IS
- Idle Regulator State
- 0 = idle above threshold
- 1 = idle below threshold
- Bit 2 - LV_ACK_CRU_AD_ECU
- Acknowledge of ACC1 CAN Message
- 0 = nACK
- 1 = ACK
- Bit 3 - LV_ERU_CAN
- Engine Running State
- 0 = engine stopped
- 1 = engine running
- Bit 4 - (STATE_CRU_CAN)???
- Bit 5 - STATE_MSW_CAN [0]
- Bit 6 - STATE_MSW_CAN [1]
- Bit 7 - STATE_MSW_CAN [2]
- 0 = No Button Pressed (Init Value)
- 1 = Set / Acceleration (tip-up)
- 2 = Deceleration (tip-down)
- 3 = Resume
- 4 = Deactivate (I/O)
- 7 = Error Condition
- Bit 0 - LV_SWI_CLU
- Byte 4 - TPS_VIRT_CRU_CAN
- Calculation = HEX * 0.390625
- 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
- Byte 6 - Bitfield
- Bit 0 - LV_BS
- Brake Switch State
- 0 = brake not actuated
- 1 = brake actuated
- Bit 1 - LV_ERR_BS
- Brake Switch System State
- 0 = brake switch system OK
- 1 = brake switch system faulty
- Bit 2 - LV_KD_CAN
- Kick Down State
- 0 = kick down not active
- 1 = kick down active
- Bit 3 - STATE_CRU_CAN [0]
- Bit 4 - STATE_CRU_CAN [1]
- Bit 5 - STATE_CRU_CAN [2]
- 0 = LV_CRU_ACT = 0
- 1 = LV_CRU_ACT = 1, constant drive (or tip-up / tip-down)
- 3 = LV_CRU_ACT = 1, resume
- 5 = LV_CRU_ACT = 1, set / acceleration
- 7 = LV_CRU_ACT = 1, deceleration
- Bit 6 - REQ_SHIFTLOCK [0]
- Bit 7 - REQ_SHIFTLOCK [1]
- 0 = no actuation is active
- 3 = actuation ISA, MTC or N_SP_IS is active
- Bit 0 - LV_BS
- Byte 7 - Unused
DME3 0x338
Refresh Rate: 1000ms and at signal change
- Byte 0 - Unused
- Byte 1 - Unused
- Byte 2 - STATE_SOF_CAN
- Sport Button Status
- 0 = Sport Button On (requested by SMG)
- 1 = Sport Button Off
- 2 = Sport Button On
- 3 = Sport Button Error
- Init: 0x01
- Byte 3 - Unused
- Byte 4 - Unused
- Byte 5 - Unused
- Byte 6 - Unused
- Byte 7 - Unused
DME4 0x545
Refresh Rate: 10ms
- Byte 0 - Bitfield
- Bit 0 - Unused
- Bit 1 - LV_MIL - Check Engine Light
- Bit 2 - Unused
- Bit 3 - LV_MAIN_SWI_CRU - CRU_MAIN_SWI
- Bit 4 - LV_ETC_DIAG - EML Light
- Bit 5 - Unused
- Bit 6 - LV_FUC_CAN - Fuel Tank Cap Light
- Bit 7 - Unused
- Byte 1 - FCO[LSB]
- Byte 2 - FCO[MSB]
- Fuel Consumption
- Byte 3 - Bitfield
- Bit 0 - Oil Level Indicator LED - Oil consumption
- Bit 1 - Oil Level Indicator LED - Oil loss
- Bit 2 - Oil Level Indicator LED - Sensor malfunction
- Bit 3 - LV_TEMP_ENG - Coolant Overheating Light (c_tco_tmot_sta)
- Bit 4 - M-Cluster Warm-Up LEDs
- Bit 5 - M-Cluster Warm-Up LEDs
- Bit 6 - M-Cluster Warm-Up LEDs
- Bit 7 - Upshift indicator
- Byte 4 - TOIL_CAN
- Oil Temperature in °C
- Calculation = HEX - 48°C
- Min: 0x00 (-48°C)
- Max: 0xFE (206°C)
- Byte 5 - Bitfield
- Bit 0 - Battery Chargelight (Alpina Roadster Only)
- Bit 1 - Unused
- Bit 2 - Unused
- Bit 3 - Unused
- Bit 4 - Unused
- Bit 5 - Unused
- Bit 6 - Unused
- Bit 7 - Unused
- Byte 6 - Oil Level (MSS54HP only)
- Calculation = (HEX - 158) / 10L
- Min: 0x80 || 0xC0 (-3.0L)
- Max: 0xBE || 0xFE (+3.2L)
- Byte 7 - Bitfield
- Bit 0 - State Tire Pressure (MSS54 only)
- Bit 1 - Unused
- Bit 2 - Unused
- Bit 3 - Unused
- Bit 4 - Unused
- Bit 5 - Unused
- Bit 6 - Unused
- Bit 7 - Status Engine Oil Pressure Low