Rainbow module for Audi: Difference between revisions
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=== Mapping from <code>kW</code> and <code> | === Mapping from <code>kW</code> and <code>Nm</code> === | ||
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. | 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 | # sniffed frame from the drivetrain bus | ||
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== Reference == | == Reference == | ||
Revision as of 08:51, 18 May 2025
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 ??? ?? ?? ?? ??