Revision as of 19:14, 9 March 2015

CAN bus mappings by OEM ECU and aftermarket device

AIM Smarty CAM CAN protocol

Megasquirt CAN (Dashboard Mode)
Channel	Units	CAN Id	Offset (bytes)	Length (bytes)	Conversion	Notes
In development

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

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
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

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

@@ Line 1: / Line 1: @@
 CAN bus mappings by OEM ECU and aftermarket device
+=AIM Smarty CAM CAN protocol=
+[[AIM_SmartyCam_CAN|Installation instructions]]
+*Baud Rate: 1MB (Configurable in Megasquirt)
+*Values in big endian format
+{| class="wikitable"
+!colspan="8"|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
+|
+|-
+|}
 =Megasquirt CAN ( MS2/MS3/MS3 Pro )=