Rainbow module for Audi: Difference between revisions
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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 == | == Hardware == | ||
=== Versions === | === Versions === | ||
| Line 14: | Line 16: | ||
== Reverse Engineering == | == 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 <code>kW</code> and <code>HP</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. | |||
# sniffed frame from the drivetrain bus | |||
??? ?? ?? ?? ?? | |||
== Reference == | == Reference == | ||
Revision as of 08:34, 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 HP
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 ??? ?? ?? ?? ??