Note: This is basically a copy of the Audi S3 8P VAG PQ35/36 2010 (MED 9.1) OEM CAN protocol, with some small changes to work on this vehicle.
NOTE: PDM20 uses the 0x50 CAN message ID for communication, which might be available on some Audi (equipped with airbag modules), do NOT use on the same bus!
Inputs.
•All four individual wheels speed from stock ABS into MaxxECU traction system.
•AC button.
•ESP button.
•Cruise control buttons.
•All input button can be custom defined by using the OEM CAN Buttons.
•Oil temp (0x51A) from instrument cluster (if available) into MaxxECU oil temp, found on some 4F vehicles.
Outputs.
•Instrument cluster (speed, tacho, CEL, odometer etc) working.
•MaxxECU oil temp to dash.
•SPORT indication, when available in dash, triggered using the digital input function Chassis SPORT mode.
Optional CAN.
•Stock ESP button can be used to activate/deactivate MaxxECU built in traction system, uses stock light on dash for confirmation.
Other support
•ABS is working.
•Haldex AWD is working if stock vehicle CAN is present.
Not working/issues.
•VCDS diagnostics with ECU is disabled.
•Fuel consumption in instrument cluster.
•Cruise control indication in dash.
Changelog
•Output RPM changed from ENGINE RPM to TACHO RPM, to be used with the Tachometer output value presentation function as an option. (disabled if any DSG control is activated, to prevent TCU error).
•Initial support.
Additional information
This CAN protocol has been tested with an Audi A4 B7 2006 with MED 9.1 Bosch 0261 208 464
Audi A4 dash
Wheel circumference must always be calibrated using an OEM CAN protocol
When we calibrate the wheel speeds from an OEM vehicle (to make an OEM CAN Protocol), we always use the stock wheel sizes, so to get correct wheel speeds within MaxxECU, you must calibrate your wheel dimensions, since they are used to show you the correct speed in MaxxECU.
