CAN Message Transmission (Communication data buses)
- Make
- Land Rover
- Model
- Freelander System Description and Operation (UK)
- Section
- Description and operation › CAN Message Transmission
Communication data busesCAN Message Transmission
CAN Message Transmission
Messages transmitted via the CAN system are made up of eight data bytes and transmitted using a baud rate of 5,000 kbits per second. The twisted pair of wires used are coloured yellow and black (CAN_H) and yellow and brown (CAN_L).
The following table lists the signals transmitted via the CAN system illustrating the system originating the message and the message recipient:
CAN Message Transmission
| Message | Source | Destination |
|---|---|---|
| Brake pedal application status | ABS ECU | EAT ECU |
| Electronic brake distribution | ABS ECU | Instrument pack |
| ABS lamp status | ABS ECU | Instrument pack |
| Traction control lamp status | ABS ECU | Instrument pack |
| Brake intervention status | ABS ECU | EAT ECU |
| Vehicle speed error status | ABS ECU | ECM |
| Vehicle speed | ABS ECU | ECM, Instrument pack |
| Road surface status (roughness) | ABS ECU | ECM (petrol only) |
| Hill Descent Control (HDC) activity status | ABS ECU | EAT ECU, ECM (not Td4) instrument pack |
| Hill Descent Control (HDC) fault status | ABS ECU | EAT ECU, ECM (not Td4), instrument pack |
| Ignition switch status | ECM | ABS ECU, EAT ECU |
| Engine speed error status | ECM | ABS ECU, EAT ECU |
| Torque reduction status | ECM | EAT ECU |
| Torque measurement error status | ECM (not Td4) | ABS ECU, EAT ECU |
| Actual engine torque | ECM | ABS ECU, EAT ECU |
| Engine speed | ECM | ABS ECU, EAT ECU, instrument pack |
| Maximum engine torque | ECM | ABS ECU, EAT ECU |
| Friction torque loss | ECM | ABS ECU, EAT ECU |
| Multiplexed information (CAN specification version, engine type identifier, scaling factor for torque values) | ECM | ABS ECU, EAT ECU, instrument pack |
| Coolant temperature | ECM | EAT ECU, instrument pack |
| Driver demand/throttle angle | ECM | ABS ECU, EAT ECU |
| Cruise active | ECM (Td4 and NAS KV6 only) | Cruise control interface unit, EAT ECU, instrument pack |
| Glowplug lamp status | ECM (Td4 only) | Instrument pack |
| Engine MIL status | ECM | EAT ECU, instrument pack |
| Cruise control master switch status | ECM (Td4 only) | Cruise control interface unit, instrument pack |
| Engine status (non emissions related faults) | ECM | Instrument pack |
| Fuel consumption | ECM | Instrument pack |
| Modified throttle angle | ECM (Td4 only) | ABS ECU |
| Throttle pedal switch status | ECM | ABS ECU |
| Throttle pedal fault | ECM | ABS ECU |
| Target gear (actual gear unless changing, then target gear) | EAT ECU | ABS ECU, ECM, instrument pack |
| Shift in progress | EAT ECU | ABS ECU, ECM |
| Gearbox MIL status | EAT ECU | ECM (KV6) |
| Selector lever position | EAT ECU | ABS ECU, ECM, instrument pack |
| Gear shift mode | EAT ECU | Instrument pack |
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