CAN messages for Audi A4 B5 chassis/dash (2001 A4 AWM 1.8t specifically) CAN_VARIANT_VAG_2001_A4_AWM_18T
Jason requested for 2 v3 ECUs (with 4 IGBT and bridge interface output)
- either v3 internal CAN (120 or 240 Ohm termination ?) =>
- or v3 2nd serial => AIM => AIM to CAN adapter (STM32F103)
- 2nd Serial and AiM->CAN would be preferred (-Jason)
- Yes, the 2 ECU's are made with 2nd serial exactly for this purpose
Termination'
- The adapter Jason has used in initial work has a 60ohm termination, so 120Ohm termination on the canbus adapter
- If it's wrong I can change it and report back here for clarity.
- What is the exact application ? Audi A4 B5 chassis (2001 A4 AWM 1.8t specifically) factory dash
CAN IDs and messages
The needed output is ID 0x280 at 100ms intervals
- with Byte 6 being TPS (0x00 to 0xFA range)
- and Bytes 3 & 4 are RPM (little endian: RPML is byte 3, RPMH is byte 4).
- other bytes are 0 ?
- Correct (They aren't zero in the OEM ECU, but I don't have all the data, and other bytes being zero allows the tachometer to work fine)
According to our knowledge the VAG VW Golf 1.8T (year 2003) (CAN dash messages) is compatible with VAG Audi 1.8T CAN_VARIANT_VAG_2001_A4_AWM_18T that we tested against.
- Jason confirms. We just installed a 2000 Golf IV 1.8t over the winter with the Aim -> Audi canbus adapter and the tach works great. Hadn't worked for 15 years since he had a competitor standalone in it prior.