Bosch Me711 Pinout (2024)

| Pin # | Signal Name | Signal Description | | --- | --- | --- | | 1 | ECT | Engine coolant temperature | | 2 | IAT | Intake air temperature | | ... | ... | ... |

The ME7.11 uses a 154-pin connector (two rows: A & B). This guide covers the most common functions.

Many people confuse the ME7.1 (found on early Audi A4 1.8T Quattro with motronic) and the ME7.1.1. The main pinout differences:

| Feature | ME7.1 (rare) | ME7.1.1 (common) | |-------------------------|-------------------|----------------------| | Injector pins | 85-88 only | 82-85 | | Extra 5V sensor supply | No | Yes (pin 60) | | Secondary O2 sensor | Not pinned | Pin 100 | | Electronic throttle | Sometimes cable | Always drive-by-wire | bosch me711 pinout

If you are swapping an engine and using a wiring diagram labeled "2001 Audi A4 1.8T" – that is ME7.1.1. Use the pinout above.

| Pin # | Signal Name | Signal Description | | --- | --- | --- | | 1 | VBATT | Battery voltage supply | | 2 | GND | Ground | | ... | ... | ... | | 14 | TPS1 | Throttle position sensor 1 | | 15 | TPS2 | Throttle position sensor 2 | | ... | ... | ... | | 30 | IGN | Ignition switch input | | ... | ... | ... |

| Pin | Function | Signal | |------|----------------|-------------| | 1 | Main Relay (87) | +12V (Battery) | | 3 | ECU Ground | Ground | | 5 | ECU Ground | Ground | | 62 | Permanent +12V | +12V (Constant) | | 68 | Main Relay (87) | +12V (Switched) | | Pin # | Signal Name | Signal

The ME711 is a hybrid of two diagnostic eras. It features a K-Line (ISO 9141-2) on Pin 43 (Connector C), which is the classic slow communication used by VAG-COM (VCDS) to read fault codes and measuring blocks. Simultaneously, it supports early CAN-Bus (High on Pin 51, Low on Pin 52) for communication with the ABS module and instrument cluster.

The pinout of the Bosch ME711 is more than a technical schematic; it is a map of a philosophy. Bosch prioritized sensor isolation, diagnostic transparency, and driver protection. For the engineer or enthusiast, reading the ME711 pinout means understanding that a single pin can represent a compromise between signal integrity and cost. Whether you are diagnosing a "limp mode" on a 1.8T or wiring a standalone into an old chassis, the 121 pins of the ME711 remain the definitive interface between human intention and mechanical execution.

End of Essay

Without correct power and ground, the ECU will not communicate via OBD or fire injectors.

| Pin | Function | Wire Color (Typical VAG) | Notes | |------|-----------------------|--------------------------|------------------------------------------| | 62 | Switched B+ (Terminal 15) | Black/Violet | Ignition-on power (from relay) | | T2 | Permanent B+ (Terminal 30) | Red/Black | Direct to battery (fused) | | T3 | Permanent B+ | Red/Black | Second main power feed | | T1 | ECU Main Ground | Brown | Chassis ground (near battery tray) | | T3 | ECU Ground (Sensor return) | Brown/Yellow | Analog sensor ground | | 50 | Power Supply Ground | Brown | Internal logic ground |

⚠️ Warning: Pins T1 and T3 are critical. A poor ground here causes erratic idle, dead throttle, and crank/no-start. Without correct power and ground, the ECU will