The OBDII (On-Board Diagnostics II) connector on a 2005 R230 Mercedes, like all standard OBDII connectors, has 16 pins. However, not all pins are used in every vehicle. This article will detail the pinout of the OBDII connector on a 2005 R230 and explain the function of each used pin.
Understanding the 2005 R230 OBDII Pinout
The following table outlines the pin configuration for the OBDII connector on a 2005 R230 Mercedes-Benz:
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | K-Line | Ignition control (EZS), air conditioning (KLA), Parktronic System (PTS), safety systems (Airbag, SRS, AB), and other modules. |
| 3 | TNA | Engine rotation speed (for turbodiesel engines). |
| 4, 5 | GND | Ground connection. |
| 6 | CAN-High | High-speed Controller Area Network (CAN) communication, including the Airbag system. |
| 7 | K-Line | Engine control diagnostic communication (ME/MSM/CDI). |
| 8 | Not used on the 2005 R230. | |
| 9 | K-Line | Diagnostic communication for ABS, ASR, ESP, ETS, and BAS systems. |
| 11 | K-Line | Diagnostic communication for gearbox and other transmission components (EGS, ETC, FTC). |
| 12 | K-Line | Diagnostic communication for the All Activity Module (AAM), radio (RD), Instrument Cluster System (ICS), and other modules. |
| 13 | K-Line | Diagnostic communication for the Airbag (AB) safety system. |
| 14 | CAN-Low | Low-speed Controller Area Network (CAN) communication. |
| 15 | K-Line | Diagnostic communication for the Instrument Cluster (IC), immobilizer (KI), Telescopic Adjustment Unit (TAU), and headlamp leveling (LWR). |
| 16 | +12V | Battery power supply. |
OBDII Protocols and the 2005 R230
The 2005 R230 utilizes the KWP2000 (Keyword Protocol 2000) and CAN (Controller Area Network) protocols for communication with diagnostic tools. This allows technicians to access and interpret diagnostic trouble codes (DTCs), monitor real-time sensor data, and perform various tests.
Importance of the OBDII Connector
The OBDII connector is a crucial component for diagnosing and troubleshooting issues in modern vehicles. It provides a standardized interface for accessing the vehicle’s electronic control units (ECUs). Understanding the pinout and communication protocols is essential for effectively using diagnostic equipment.
