Pin 7 controls the injector for Cylinder 3, and Pin 47 controls Cylinder 4.
Note: On M7.9.x, the T81 often handles high-current loads like fuel pump relays.
Connect an LED test light between A7 (coil 1) and battery+. Crank engine – LED should pulse. A standard multimeter may show average 2.5V.
: Many guides, such as the Bosch M7.4.4 ECU Overview , highlight the modularity of the connectors (often 112 channels across three modular plugs), which facilitates communication across CAN networks. Common Feedback & Considerations Bosch ME7.4.4/M7.4.4 ECU Overview | PDF - Scribd
Pin 7 controls the injector for Cylinder 3, and Pin 47 controls Cylinder 4.
Note: On M7.9.x, the T81 often handles high-current loads like fuel pump relays.
Connect an LED test light between A7 (coil 1) and battery+. Crank engine – LED should pulse. A standard multimeter may show average 2.5V.
: Many guides, such as the Bosch M7.4.4 ECU Overview , highlight the modularity of the connectors (often 112 channels across three modular plugs), which facilitates communication across CAN networks. Common Feedback & Considerations Bosch ME7.4.4/M7.4.4 ECU Overview | PDF - Scribd