The ME7.4.5 grounds heavily through the engine block. Ensure Pin A3 displays near-zero resistance to the negative battery terminal. High resistance here causes erratic throttle body behavior and random sensor codes.
Do not use direct 12V supply to the boot pin directly; always use the proper resistance, or you may damage the ECU. me745 pinout free
The "ME745" name is used in parts catalogs and on the ECU case itself, though the official Bosch part number is typically . It commonly pairs with 1.6L 16V engines (TU5JP4) and uses an ST10F275 microcontroller. The ME7
A: Yes. If you are swapping a different engine variant (e.g., NFU) into a car that had a different wiring configuration, repinning the ECU connectors is a common step to ensure all sensors and actuators work correctly. Do not use direct 12V supply to the
Use these specific pin assignments to connect your chip調校 (tuning) tool on the bench via K-Line or CAN bus. Power and Communication Pins Connection Type Connector & Pin Number Wire Function Connector A, Pin G4 12V Battery Positive Switched Power (+15) Connector A, Pin H4 12V Ignition On Ground (GND) Connector A, Pin H1 Chassis Earth Ground (GND) Alternative Connector A, Pin G1 Chassis Earth K-Line Diagnostic Connector A, Pin B4 Serial Communication CAN High (CAN-H) Connector A, Pin D4 High-Speed Network CAN Low (CAN-L) Connector A, Pin E4 High-Speed Network Detailed Connector Pinouts Connector A (32-Way Black) - Power & Body Control A1 to A3 : Unused B4 : K-Line diagnostic line C3 : Alternator charge warning lamp signal D4 : CAN High communication link E4 : CAN Low communication link F1 : Main power relay control output G1 : Main system ground G4 : Permanent +12V battery supply H1 : Main system ground H4 : Switched +12V ignition supply Connector B (48-Way Brown) - Engine Sensors A1 : Engine coolant temperature sensor signal B2 : Intake air temperature sensor signal C1 : Manifold absolute pressure (MAP) sensor signal D3 : Camshaft position sensor signal E1 : Crankshaft position sensor signal (+) E2 : Crankshaft position sensor signal (-) F3 : Knock sensor signal (+) G2 : Throttle position sensor track 1 G3 : Throttle position sensor track 2 H1 : Sensor 5V reference supply voltage H2 : Sensor signal ground return Connector C (32-Way Grey) - Actuators & Ignition A1 : Cylinder 1 injector control circuit A2 : Cylinder 2 injector control circuit B1 : Cylinder 3 injector control circuit B2 : Cylinder 4 injector control circuit C3 : Electronic throttle body motor control (+) C4 : Electronic throttle body motor control (-) D1 : Ignition coil cylinder 1 and 4 control D2 : Ignition coil cylinder 2 and 3 control E3 : Upstream O2 sensor heater control F3 : Downstream O2 sensor heater control G1 : Canister purge valve control Technical Notes for Wiring