Bosch Me711 Pinout ❲FAST❳

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 |

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.

The Bosch ME7.1 (Motronic Electronic 7.1) is a highly successful Engine Control Unit (ECU) produced by Robert Bosch GmbH. It represents a significant evolution in engine management technology, widely used throughout the late 1990s and 2000s. Unlike its predecessor (ME2.x or ME7.0), the ME7.1 utilizes a faster processor (usually the Infineon C167) and supports more complex torque-based engine management strategies. bosch me711 pinout

This guide focuses on the standard hardware configuration and pinout for the ME7.1, typically found in vehicles such as the Audi A4 (B5/B6), VW Passat B5, and various Porsche and Volvo models.

Before using this pinout, confirm your ECU:

Do not confuse with:

Here's a summary of the Bosch ME711 pinout:

These pins control the engine’s combustion events.

| Pin | Function | Signal Type | Connected To | |------|-----------------------------|----------------------|---------------------------| | 85 | Injector Cylinder 1 | Switched ground | Fuel injector (N30) | | 84 | Injector Cylinder 2 | Switched ground | Fuel injector (N31) | | 83 | Injector Cylinder 3 | Switched ground | Fuel injector (N32) | | 82 | Injector Cylinder 4 | Switched ground | Fuel injector (N33) | | 94 | Ignition Output 1 (Coil 1&4) | Logic signal | Ignition amplifier (N122) | | 95 | Ignition Output 2 (Coil 2&3) | Logic signal | Ignition amplifier (N122) | | 107| Fuel Pump Relay Control | 12V output | Relay (J17) – activates on crank | Many people confuse the ME7

If your OBD-II scanner says "No communication" but the ECU has power (pin 80), check the CAN bus. Resistance between pin 15 (CAN Low) and pin 16 (CAN High) should be approximately 60 ohms (due to two 120-ohm terminating resistors in the cluster and ABS module). Open circuit (>100 ohms) means a broken wire.

| Pin | Actuator | Signal | |------|------------------------|----------------| | 4 | Injector Cyl 4 | Switched Ground | | 6 | Injector Cyl 3 | Switched Ground | | 17 | Injector Cyl 1 | Switched Ground | | 18 | Injector Cyl 2 | Switched Ground | | 22 | Fuel Pump Relay | Switched Ground | | 26 | Ignition Coil 1 (Output) | Logic/TTL | | 27 | Ignition Coil 2 (Output) | Logic/TTL | | 31 | N75 (Boost Control) | PWM (Ground side) | | 36 | Idle Air Control (N71) | PWM | | 53 | Ignition Coil 3 (Output) | Logic/TTL | | 56 | Ignition Coil 4 (Output) | Logic/TTL | | 64 | EVAP Purge Valve | Switched Ground | | 65 | VVT Solenoid (if equipped) | PWM |

To bench-flash this ECU with tools like Galletto, Kess, or Neubauer, build a minimal harness: Do not confuse with:

⚡ Bench power: Use a 10A+ 12V bench supply. The ME7.1.1 draws ~1.5A idle but 5-7A when driving injectors/coils during a flash.