Rainbow module for Audi
Additional module that injects missing data into the CAN-BUS. This will allow displaying Power and Torque values on the instrument cluster sport gauges.
Hardware
Versions
TODO
Installation
TODO
Coding & Adaptation
TODO
Reverse Engineering
Torque
Torque is provided by the ECU as an essential part of the communication between modules (ECU, Gearbox, ABS/ESP...).
# UDS request for diagnostic Bus to get current torque: 0x7e0 03 22 43 7c 00 00 00 00 # sniffed frame from the drivetrain bus ??? ?? ?? ?? ??
Power
Power is a function of Torque and RPM and it can be calculated from the two.
# UDS request for the diagnostic Bus to get current RPM 0x7e0 03 22 20 6e 00 00 00 00 # sniffed frame from the drivetrain bus ??? ?? ?? ?? ??
Mapping from kW and Nm
Both Power and Torque on the instrument cluster display are displayed as a percent. Most likely the data is provided as a value within 0 to 100 range. To map current torque and current power to percent, we need to know the peak torque value of the engine. This data is also provided by the ECU.
# sniffed frame from the drivetrain bus ??? ?? ?? ?? ??