Mercedes Benz diagnostics obd
Introduction
XTOOLS D5S
Samsara and Verizon
OBD2, OBD2 (MB W211, 2003-). OBD2 from 1996. Connectors: Type A or Type B.
- https://obdplanet.com/obd2-protocol/
- https://en.wikipedia.org/wiki/ELM327 https://www.elmelectronics.com/wp-content/uploads/2016/07/ELM327DS.pdf
- https://en.wikipedia.org/wiki/OBD-II_PIDs
- OBDLink and VGate makes good adapters
- (https://github.com/zanac/pyHPSU contains a clean implementation of KWP2000 that many hobbyists have studied and adapted)
- freediag
(Mercedes) ECU reverse engineering
Generic OBD-II readers only access the engine (ECU) and emissions-related systems. Airmatic, SBC brakes, SAM modules, instrument cluster, seat modules, climate, etc. all use Mercedes-specific diagnostics (K-Line and CAN, depending on module). A generic ELM327-based tool cannot properly diagnose these systems. MB alternatives
- OpenVehicleDiag (OVD). Supports: ISO-TP, KWP2000, UDS, J2534, SocketCAN. Need to know Mercedes diagnostic identifiers.
- openStar. Small and incomplete.
- Tactrix OpenPort 2.0 Supports K-Line, CAN, J2534 PassThru. Owners using Tactrix OpenPort + Xentry Passthru report access to nearly every module (MBWorld).
- pyOBD / python-OBD
- SavvyCAN
- OpenGarages / ELM327 tools
Some open Source alternatives
- https://github.com/cedricp/ddt4all
- https://github.com/YangChuan80/KatyOBD
- https://github.com/rnd-ash/OpenVehicleDiag
- https://freediag.sourceforge.io/
- https://github.com/jakka351/GenericDiagnosticTool
- Realtime https://github.com/bgunson/onboardpi
- https://github.com/prithvisekhar/VehicalDiagnosticAlgo
- https://github.com/dchad/OBD-Monitor
- https://github.com/barracuda-fsh/pyobd
- https://medevel.com/ovms3/
- Old https://github.com/shchers/ecu-simulator
- Arduino Honda https://github.com/kerpz/ArduinoHondaOBD
- https://github.com/brendan-w/python-OBD
- https://github.com/stko/oobd
- https://github.com/md-sohrab-alam/android-obd-reader
- https://www.savvycan.com/
- https://sourceforge.net/projects/openobd/
- https://github.com/kees/scantool
- https://github.com/thatlarrypearson/vehicle-telemetry-system
- Older of the previous https://github.com/thatlarrypearson/telemetry-obd
- https://github.com/fussek/Bluetooth-OBD-II-Diagnostic-Tool
- live OBD-II data, fault code analysis, and offline VIN decoding. https://github.com/provrb/obdium
- OdxTools.
- Freediag https://freediag.sourceforge.io/ https://github.com/fenugrec/freediag/
- https://github.com/mercedes-benz/odxtools
Adapter https://hackaday.com/tag/iso-15765-4-can/
Mercedes Xentry.
A USB-to-OBD adapter with an embedded processor that supports SAE J2534 Pass-Thru (an industry standard used by OEM diagnostic software), CAN, K-Line (important for older Mercedes), KWP2000 and ISO9141.
DTCs (diagnostic trouble codes) PID (Parameter Identifiers)
Mercedes
Mercedes FOSS. https://opensource.mercedes-benz.com/projects/ https://github.com/mercedes-benz
https://www.forum-mercedes.com/img/members/34569/schema-W211-CAN_59-end.pdf
- CAN B, CAN C, CAN D (X11/4)
ISO 15765-4
W211 https://pinoutguide.com/CarElectronics/mercedes_obd2_diag_pinout.shtml
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | K-Line | Ignition control (EZS), air-conditioner (KLA), PTS, safety systems (Airbag, SRS, AB) and some other |
| 3 | TNA | TD engine rotation speed |
| 4,5 | GND | Ground |
| 6 | CAN-high | CAN-High (including AirBag system in W203, W209, W220, W240, R230, С215 after 2004y) |
| 7 | K-Line | Engine control diagnostic (ME/MSM/CDI) |
| 8 | Ignition,... | |
| 9 | K-Line | ABS, ASR, ESP, ETS, BAS diagnostic |
| 11 | K-Line | Gearbox and other transmission components (EGS, ETC, FTC) |
| 12 | K-Line | All activity module (AAM), Radio (RD), ICS, ... |
| 13 | K-Line | AB diagnostic - safety systems |
| 14 | CAN-Low | CAN |
| 15 | K-Line | IC, KI, TAU, LWR diagnostic |
| 16 | +12V | Power |
