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 (due to two 120-ohm terminating resistors in the cluster and ABS module). Open circuit (>100 ohms) means a broken wire.
Many people confuse the (found on early Audi A4 1.8T Quattro with motronic) and the ME7.1.1 . The main pinout differences:
The Bosch ME711 pinout consists of a 143-pin connector, which is divided into several sections. The pinout is categorized into: bosch me711 pinout
g., Audi S4, VW Golf R32) or a particular like Immo-off? Bosch ME7.4.4 ECU Pinout Guide | PDF - Scribd
Note: Pin 62 on the large connector is also used as an auxiliary ground in some wiring harnesses, but Pin 1 on the large connector is sufficient for bench power supply loops. Step-by-Step Bench Flashing Setup If your OBD-II scanner says "No communication" but
The ME711 does not use a single monolithic plug. Instead, it utilizes three distinct, color-coded connectors (typically labeled T121, or subdivided into T80, T60, and T40 depending on the specific housing). These are generally referred to as:
| Pin | Sensor | Signal Type | |------|-----------------------|-------------------| | 8 | MAP Sensor Signal | Analog (0-5V) | | 21 | Intake Air Temp (IAT) | Analog | | 24 | Engine Coolant Temp (ECT) | Analog | | 30 | Camshaft Position (G40) | Hall Sensor | | 39 | Knock Sensor 1 | AC Signal | | 45 | Throttle Position (TPS) | Analog (0-5V) | | 46 | Throttle Position (TPS) | Analog (0-5V) | | 52 | Lambda Sensor (O2) | 0-1V (Narrowband) | | 59 | Crankshaft Position (G28) | VR Sensor | | 60 | Crankshaft Position (G28) | VR Sensor (Shield) | | 66 | MAP Sensor Ground | Sensor Ground | Many people confuse the (found on early Audi A4 1
This information is for educational purposes. Modifying or repinning an ECU can cause engine damage if done incorrectly. Always verify with factory documentation for your specific vehicle.
The Bosch ME711 is a sophisticated engine control unit designed for gasoline and diesel engines. It's part of the Bosch Motronic family, known for its advanced engine management systems. The ME711 ECU is widely used in various vehicles, including passenger cars, trucks, and industrial equipment.