CAN Bus database: Difference between revisions

 
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CAN bus mappings by OEM ECU and aftermarket device
CAN bus mappings by OEM ECU and aftermarket device


=Megasquirt CAN ( MS2/MS3/MS3 Pro )=
=OEM ECUs (Non OBD-II protocol)=
 
==BMW E46==
[[BMW_E46_CAN|Installation instructions]]
*Baud Rate: 500K
*Little Endian Format
 
{| class="wikitable"
!colspan="7"|BMW E46 (including M3)
|-
!Channel
!Units
!CAN Id
!Offset (bytes)
!Length (bytes)
!Conversion
!Notes
|-
|TPS
|%
|809
|6
|1
|(B6 / 255)
|
|-
|EngineTemp
|C
|809
|2
|1
|(B2 * 0.75) - 48.373
|Convert to Farenheight: (temperatureC * 1.8) + 32
|-
|OilTemp
|C
|1349
|5
|1
|B5 - 48.373
|Convert to Farenheight: (temperatureC * 1.8) + 32
|-
|RPM
|
|790
|3-4
|1
|((B4 * 256) + B3) / 6.4
|
|}
 
==Mini Cooper R53==
[[Mini_Cooper_CAN|Installation instructions]]
*Baud Rate: 500K
*Little Endian Format
 
{| class="wikitable"
!colspan="7"|Mini Cooper R53
|-
!Channel
!Units
!CAN Id
!Offset (bytes)
!Length (bytes)
!Conversion
!Notes
|-
|TPS
|%
|809
|6
|1
|(B6 / 254) * 100
|
|-
|EngineTemp
|C
|809
|2
|1
|(B2 * 0.75) - 48.373
|Convert to Farenheight: (temperatureC * 1.8) + 32
|-
|RPM
|
|790
|3-4
|1
|((B4 * 256) + B3) / 6.4
|
|}
 
=Aftermarket ECUs=
==Motec M84==
* Standard Channel Mapping for Motec M84 ECU
* Big Endian (MSB) data format
 
{| class="wikitable"
!colspan="8"|Motec M84
|-
!Channel
!Units
!CAN Id
!Offset (bytes)
!Length (bytes)
!Multiplier
!Adder
!Notes
|-
|RPM
|RPM
|?
|0
|2
|1
|0
|
|-
|TPS
|%
|?
|2
|2
|1
|0
|
|-
|MAP
|kPa
|?
|4
|2
|1
|0
|
|-
|AIT
|C
|?
|6
|2
|1
|0
|
|-
|EngineTemp
|C
|?
|8
|2
|1
|0
|
|-
|AFR
|Lambda
|?
|10
|2
|1
|0
|
|-
|FuelPress
|kPa
|?
|20
|2
|1
|0
|
|-
|OilPress
|kPa
|?
|24
|2
|1
|0
|
|-
|Speed? (Dig In 1 Speed?)
|
|?
|52
|2
|1
|0
|Need to verify this field
|-
|InjDutyCyc
|%
|?
|110
|2
|1
|0
|
|-
|}
 
==Megasquirt CAN ( MS2/MS3/MS3 Pro )==
[[Megasquirt_CAN|Installation instructions]]
[[Megasquirt_CAN|Installation instructions]]
*Baud Rate: 1MB (Configurable in Megasquirt)
*Baud Rate: 500K (Configurable in Megasquirt)
*Values in big endian format
*Values in big endian format
*Default base CAN id: 1520
*[http://www.msextra.com/doc/pdf/Megasquirt_CAN_Broadcast.pdf Full CAN bus mapping for Megasquirt]
 
 
{| class="wikitable"
!colspan="8"|Megasquirt CAN (Dashboard Mode)
|-
!Channel
!Units
!CAN Id
!Offset (bytes)
!Length (bytes)
!Multiplier
!Adder
!Notes
|-
|MAP
|kPa
|1512
|0
|2
|0.1
|0
|Manifold Absolute Pressure
|-
|RPM
|
|1512
|2
|2
|1
|0
|
|-
|Coolant
|F
|1512
|4
|2
|0.1
|0
|
|-
|TPS
|%
|1512
|6
|2
|0.1
|0
|
|-
|MAT
|F
|1513
|4
|2
|0.1
|0
|Manifold Air Temperature
|-
|AFR
|
|1514
|0
|1
|0.1
|0
|
|}


{| class="wikitable"
{| class="wikitable"
!colspan="7"|Megasquirt CAN
!colspan="7"|Megasquirt CAN (standard mode)
|-
|-
!Channel
!Channel
Line 99: Line 368:
|}
|}


=BMW E46=
==MBE Systems 992==
[[BMW_E46_CAN|Installation instructions]]
[[MBE_Systems_992|Installation instructions]]
*Baud Rate: 500K
*Baud Rate: ???
*Little Endian format


{| class="wikitable"
{| class="wikitable"
!colspan="7"|BMW E46 (including M3)
!colspan="7"|MBE Systems 992  (Locked Caterham mode)
|-
|-
!Channel
!Channel
Line 113: Line 383:
!Conversion
!Conversion
!Notes
!Notes
|-
|EngineTemp
|C?
|814
|0
|1
|B0
|Need to verify scaling and temperature units
|-
|RPM
|RPM
|814
|1
|2
|(B2 * 256) + B1
|-
|-
|TPS
|TPS
|%
|%
|809
|814
|6
|3
|0
|B0 / 5.0
|Outputs as throttle voltage. assuming a 0-5v system, scale by 5v
|-
|OilPress
|PSI?
|815
|2
|1
|B2
|Need to verify scaling and Pressure units
|-
|OilTemp
|C?
|815
|3
|1
|B3
|Need to verify scaling and temperature units
|}
 
=Tire Pressure Monitoring Systems (TPMS)=
==Brightwater Technologies (WIP)==
* Baud Rate 1MBPS (500KBPS optional)
* Big Endian (MSB) data format
* [[Brightwater_TPMS_CAN|Integration Details (WIP)]]
{| class="wikitable"
!colspan="8"|Brightwater TPMS
|-
!Channel
!Units
!CAN Id
!Offset (bytes)
!Length (bytes)
!Multiplier
!Adder
!Notes
|-
|TirePres_RF
|PSI
|1440
|2
|2
|0.01
|0
|
|-
|TireITmp_RF
|C
|1440
|3
|1
|1
|(B6 / 255)
|0
| -40
|Internal Tire Temperature
|-
|TirePres_LF
|PSI
|1441
|2
|2
|0.01
|0
|
|
|-
|-
|EngineTemp
|TireITmp_FL
|C
|C
|809
|1441
|3
|1
|0
| -40
|Internal Tire Temperature
|-
|TirePres_RR
|PSI
|1442
|2
|2
|2
|0.01
|0
|
|-
|TireITmp_RR
|C
|1442
|3
|1
|1
|(B2 * 0.75) - 48.373
|0
|Convert to Farenheight: (temperatureC * 1.8) + 32
| -40
|Internal Tire Temperature
|-
|TirePres_RL
|PSI
|1443
|2
|2
|0.01
|0
|
|-
|-
|OilTemp
|TireITmp_RL
|C
|C
|1349
|1443
|5
|3
|1
|1
|B5 - 48.373
|0
|Convert to Farenheight: (temperatureC * 1.8) + 32
| -40
|Internal Tire Temperature
|}
 
=Cameras=
==AIM Smarty CAM CAN protocol==
[[AIM_SmartyCam_CAN|Installation instructions]]
*Baud Rate: 1MB
*Values in little endian format
 
{| class="wikitable"
!colspan="8"|AIM Smarty CAM protocol
|-
!Channel
!Units
!CAN Id
!Offset (bytes)
!Length (bytes)
!Multiplier
!Adder
!Notes
|-
|-
|RPM
|RPM
|RPM
|1056
|0
|2
|1
|0
|
|
|790
|-
|3-4
|EngineTemp
|C
|1056
|6
|2
|0.1
|0
|
|-
|OilTemp
|C
|1057
|4
|2
|0.1
|0
|
|-
|OilPress
|Bar
|1057
|6
|2
|0.01
|0
|
|-
|TPS
|%
|1058
|2
|1
|1
|0
|
|-
|Fuel
|L
|1070
|0
|1
|1
|1
|((B4 * 256) + B3) / 6.4
|0
|
|
|-
|}
|}

Latest revision as of 03:34, 16 July 2015

CAN bus mappings by OEM ECU and aftermarket device

OEM ECUs (Non OBD-II protocol)

BMW E46

Installation instructions

  • Baud Rate: 500K
  • Little Endian Format
BMW E46 (including M3)
Channel Units CAN Id Offset (bytes) Length (bytes) Conversion Notes
TPS % 809 6 1 (B6 / 255)
EngineTemp C 809 2 1 (B2 * 0.75) - 48.373 Convert to Farenheight: (temperatureC * 1.8) + 32
OilTemp C 1349 5 1 B5 - 48.373 Convert to Farenheight: (temperatureC * 1.8) + 32
RPM 790 3-4 1 ((B4 * 256) + B3) / 6.4

Mini Cooper R53

Installation instructions

  • Baud Rate: 500K
  • Little Endian Format
Mini Cooper R53
Channel Units CAN Id Offset (bytes) Length (bytes) Conversion Notes
TPS % 809 6 1 (B6 / 254) * 100
EngineTemp C 809 2 1 (B2 * 0.75) - 48.373 Convert to Farenheight: (temperatureC * 1.8) + 32
RPM 790 3-4 1 ((B4 * 256) + B3) / 6.4

Aftermarket ECUs

Motec M84

  • Standard Channel Mapping for Motec M84 ECU
  • Big Endian (MSB) data format
Motec M84
Channel Units CAN Id Offset (bytes) Length (bytes) Multiplier Adder Notes
RPM RPM ? 0 2 1 0
TPS % ? 2 2 1 0
MAP kPa ? 4 2 1 0
AIT C ? 6 2 1 0
EngineTemp C ? 8 2 1 0
AFR Lambda ? 10 2 1 0
FuelPress kPa ? 20 2 1 0
OilPress kPa ? 24 2 1 0
Speed? (Dig In 1 Speed?) ? 52 2 1 0 Need to verify this field
InjDutyCyc % ? 110 2 1 0

Megasquirt CAN ( MS2/MS3/MS3 Pro )

Installation instructions


Megasquirt CAN (Dashboard Mode)
Channel Units CAN Id Offset (bytes) Length (bytes) Multiplier Adder Notes
MAP kPa 1512 0 2 0.1 0 Manifold Absolute Pressure
RPM 1512 2 2 1 0
Coolant F 1512 4 2 0.1 0
TPS % 1512 6 2 0.1 0
MAT F 1513 4 2 0.1 0 Manifold Air Temperature
AFR 1514 0 1 0.1 0
Megasquirt CAN (standard mode)
Channel Units CAN Id Offset (bytes) Length (bytes) Conversion Notes
RPM RPM 1520 6 2 (B6 * 256) + B7
IgnTiming Degrees 1521 0 2 ((B0 * 256) + B1) / 10
AFR AFR 1521 4 2 ((B4 * 256) + B5) / 10 Legacy AFR1 (Deprecated on MS3) - to use AFR2 specify offset 6
MAP kPa 1522 2 2 ((B2 * 256) + B3) / 10
MAT F 1522 4 2 ((B4 * 256) + B5) / 10
EngineTemp F 1522 6 2 ((B6 * 256) + B7) / 10
TPS % 1523 0 2 ((B0 * 256) + B1) / 10
EngineTemp F 1522 6 2 ((B6 * 256) + B7) / 10
Knock % 1524 0 2 ((B0 * 256) + B1) / 10 Indication of knock input
AFR % 1551 0 1 B0 / 10 AFR for cylinder #1 (MS3+ compatible) - add 1 to offset for subsequent AFR inputs

MBE Systems 992

Installation instructions

  • Baud Rate: ???
  • Little Endian format
MBE Systems 992 (Locked Caterham mode)
Channel Units CAN Id Offset (bytes) Length (bytes) Conversion Notes
EngineTemp C? 814 0 1 B0 Need to verify scaling and temperature units
RPM RPM 814 1 2 (B2 * 256) + B1
TPS % 814 3 0 B0 / 5.0 Outputs as throttle voltage. assuming a 0-5v system, scale by 5v
OilPress PSI? 815 2 1 B2 Need to verify scaling and Pressure units
OilTemp C? 815 3 1 B3 Need to verify scaling and temperature units

Tire Pressure Monitoring Systems (TPMS)

Brightwater Technologies (WIP)

Brightwater TPMS
Channel Units CAN Id Offset (bytes) Length (bytes) Multiplier Adder Notes
TirePres_RF PSI 1440 2 2 0.01 0
TireITmp_RF C 1440 3 1 0 -40 Internal Tire Temperature
TirePres_LF PSI 1441 2 2 0.01 0
TireITmp_FL C 1441 3 1 0 -40 Internal Tire Temperature
TirePres_RR PSI 1442 2 2 0.01 0
TireITmp_RR C 1442 3 1 0 -40 Internal Tire Temperature
TirePres_RL PSI 1443 2 2 0.01 0
TireITmp_RL C 1443 3 1 0 -40 Internal Tire Temperature

Cameras

AIM Smarty CAM CAN protocol

Installation instructions

  • Baud Rate: 1MB
  • Values in little endian format
AIM Smarty CAM protocol
Channel Units CAN Id Offset (bytes) Length (bytes) Multiplier Adder Notes
RPM RPM 1056 0 2 1 0
EngineTemp C 1056 6 2 0.1 0
OilTemp C 1057 4 2 0.1 0
OilPress Bar 1057 6 2 0.01 0
TPS % 1058 2 1 1 0
Fuel L 1070 0 1 1 0
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