Me7.4.5 Pinout ((free)) (RECENT ✧)
: Remove one specific resistor on the ECU board and add two 6.8k ohm resistors .
Ensure your power source does not drop below 12V when the tool initializes communication.
The Bosch ME7.4.5 controls fuel injection, ignition timing, and emissions systems. It relies on a ST10F275 microprocessor, which houses the internal flash memory holding the vehicle's engine map data. Common Vehicle Applications
Touch the other end of the resistor to the boot pad/pin. me7.4.5 pinout
Understanding the is essential for automotive technicians, tuners, and DIY enthusiasts working on PSA Peugeot Citroën vehicles. This Engine Control Unit manages 16V petrol engines (such as the popular 1.6L NFU/TU5JP4). It coordinates everything from fuel injection and electronic throttle control to CAN-bus diagnostics and immobilizer security.
Related search suggestions (may help find vehicle‑specific pinouts)
Some guides, such as those from Piasini Engineering , specify adding two 6k8 ohm resistors and removing one existing resistor to enable boot mode. : Remove one specific resistor on the ECU
| | Pin: | Signal Type / Description | |:---|:---:|:---| | A | A3 | Power Supply (PWR / Batt+) | | C | C? | Power Supply (PWR / Batt+) | | ? | ? | Main Ground (GND) | | ? | ? | Main Ground (GND) | | ? | F4 | Switched Power (IGN / ACC) |
Understanding the involves mapping the main power (G2, H2, M3), ground (A4, M4), and diagnostics (E3/K-Line) to activate the unit outside the car. Always ensure proper voltage ( ) when connecting to prevent damage to the microprocessor. Need specific pinouts or help with your ME7.4.5? If you'd like, let me know: The exact Peugeot/Citroën model and year The engine code (e.g., TU5JP4, EW10A)
Commonly used for more modern communication protocols, with High on A3 and Low on A4 in some configurations. Advanced Operations: Boot Mode It relies on a ST10F275 microprocessor, which houses
The Bosch ME7.4.5 ECU, commonly used in PSA group vehicles (Peugeot/Citroën) with the 1.6L 16V engine, uses three main connectors labeled A, B, and C Essential Bench Connections
| Pin | Connector | Signal Name | Description | Typical Function | |------|-----------|----------------|--------------------------------|--------------------------| | 1 | A | Ground | Sensor ground | - | | 2 | A | EVAP Canister Purge Valve (N80) | Duty cycle control | Emissions | | 3 | A | Ground | Power ground for injectors/coils | - | | 4 | A | +12V Battery | Permanent power (Terminal 30) | ECU memory | | 5 | A | +12V Switched (Terminal 15) | Switched via ignition | Wake-up signal | | 6 | A | CAN-High | Drivetrain CAN bus | ABS, Instrument cluster | | 7 | A | CAN-Low | Drivetrain CAN bus | ABS, Instrument cluster | | 8 | A | Brake light switch signal | Input | Brake pedal | | 9 | A | Clutch pedal switch | Input | Cruise control / starting | | 10 | A | A/C compressor request | Input | Climate control | | 11 | A | Radiator fan activation (low speed) | Output | Cooling | | 12 | A | Radiator fan activation (high speed) | Output | Cooling | | 13 | A | --- | Not used | - | | 14 | A | Alternator excitation signal | Output | Charge warning | | 15 | A | Diagnostic K-Line (ISO 9141) | Bi-directional | OBD2 communication | | 16 | A | --- | Not used | - | | 17 | A | --- | Not used | - | | 18 | A | --- | Not used | - | | 19 | A | Fuel pump relay control | Output | Activates FP relay | | 20 | A | Engine speed output (RPM signal) | Output | Tachometer cluster | | 21 | A | MIL (Check engine light) | Output | Warning lamp | | 22 | A | EPC light | Output | Electronic Power Control | | 23 | A | +5V Sensor supply | Reference voltage | For MAP, TPS, etc. | | 24 | A | --- | Not used | - | | 25 | A | --- | Not used | - | | 26 | A | --- | Not used | - | | 27 | A | --- | Not used | - | | 28 | B | Knock sensor 1 (cyl 1 & 2) | Signal input | Ignition timing control | | 29 | B | Knock sensor 2 (cyl 3 & 4) | Signal input | Ignition timing control | | 30 | B | Sensor ground (shield) | For knock sensors | - | | 31 | B | Intake Air Temp (IAT) | Signal input | Inside MAF or TMAP | | 32 | B | Engine Coolant Temp (ECT) | Signal input | Temperature compensation | | 33 | B | Shield ground | For crank/cam sensors | - | | 34 | B | MAF signal | Frequency/duty cycle | Airflow metering | | 35 | B | MAF ground | Sensor return | - | | 36 | B | G28 Engine speed (crank sensor) | Differential signal (-) | RPM base timing | | 37 | B | G28 Engine speed (crank sensor) | Differential signal (+) | RPM base timing | | 38 | B | G40 Camshaft position sensor | Hall effect signal | Sequential injection | | 39 | B | Throttle position sensor (G187) | Signal 1 (closing) | ETC | | 40 | B | Throttle position sensor (G188) | Signal 2 (opening) | ETC redundancy | | 41 | B | Accelerator pedal position (G79) | Signal 1 | Driver demand | | 42 | B | Accelerator pedal position (G185) | Signal 2 | Redundant signal | | 43 | B | MAP sensor (Integrated) | Boost pressure signal | Inside ECU case | | 44 | B | MAP sensor ground | Internal ECU | - | | 45 | B | External MAP (for some models) | Boost input (rare) | - | | 46 | B | --- | Not used | - | | 47 | C | Injector cylinder 1 | Output (ground switch) | Fuel delivery | | 48 | C | Injector cylinder 2 | Output (ground switch) | Fuel delivery | | 49 | C | Injector cylinder 3 | Output (ground switch) | Fuel delivery | | 50 | C | Injector cylinder 4 | Output (ground switch) | Fuel delivery | | 51 | C | Ignition coil 1 (power stage) | Output | Spark | | 52 | C | Ignition coil 2 (power stage) | Output | Spark | | 53 | C | Ignition coil 3 (power stage) | Output | Spark | | 54 | C | Ignition coil 4 (power stage) | Output | Spark | | 55 | C | N75 Boost control valve | PWM output | Wastegate control | | 56 | C | Idle Air Control (N71) | PWM output (if not DBW) | Idle stabilization | | 57 | C | Secondary air injection pump relay | Output | Cold start emissions | | 58 | C | Secondary air injection valve (N112) | Output | Air diverter | | 59 | C | O2 sensor heater (Bank 1, Sensor 1) | Output | Lambda heating | | 60 | C | O2 sensor heater (Bank 1, Sensor 2) | Output (post-cat) | Heating | | 61 | C | O2 sensor (Sensor 1) signal | Input (0-1V or wideband) | AFR | | 62 | C | O2 sensor (Sensor 1) ground | Ground for lambda | - | | 63 | C | O2 sensor (Sensor 2) signal | Input | Post-cat monitoring | | 64 | C | O2 sensor (Sensor 2) ground | Ground | - | | 65 | C | Fuel tank pressure sensor | Input | Leak detection | | 66 | C | --- | Not used | - | | 67 | C | --- | Not used | - | | 68 | C | --- | Not used | - | | 69 | A | +12V Switched (Terminal 15) duplicate | Redundant | Safety | | 70 | A | Ground | Power ground | High current | | 71 | A | Ground | Power ground | High current | | 72 | A | +12V Battery duplicate | Redundant main power | - | | 73 | A | +12V Battery duplicate | Redundant main power | - | | 74-121 | --- | Various unused or vehicle-specific pins | (e.g., cruise control, A/C pressure) | Check wiring diagram |