CAN Bus database: Difference between revisions
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[[MBE_Systems_992|Installation instructions]] | [[MBE_Systems_992|Installation instructions]] | ||
*Baud Rate: ??? | *Baud Rate: ??? | ||
*Little Endian format | |||
{| class="wikitable" | {| class="wikitable" | ||
| Line 163: | Line 164: | ||
!Notes | !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 | |||
|} | |} | ||
Revision as of 19:22, 22 February 2015
CAN bus mappings by OEM ECU and aftermarket device
Megasquirt CAN ( MS2/MS3/MS3 Pro )
- Baud Rate: 1MB (Configurable in Megasquirt)
- Values in big endian format
- Default base CAN id: 1520
- Full CAN bus mapping for Megasquirt
| Megasquirt CAN | ||||||
|---|---|---|---|---|---|---|
| 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 |
BMW E46
- Baud Rate: 500K
| 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 | ||
MBE Systems 992
- 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 |
