Me7.4.5 Pinout [hot] (TRUSTED • 2026)

The Bosch ME7.4.5 is a widely used Engine Control Unit (ECU) in PSA Group (Peugeot/Citroën) vehicles, specifically those equipped with the 1.6L 16V gasoline engines. Understanding its pinout is essential for automotive technicians and enthusiasts involved in ECU remapping, cloning, or troubleshooting. Overview of the Bosch ME7.4.5

Static Discharge: Use an anti-static mat when opening the ECU case to avoid damaging the CMOS components. me7.4.5 pinout

1 — Battery + (permanent 12V)
2 — Injector 1 control
3 — Injector 2 control
4 — Injector 3 control
5 — Injector 4 control
6 — Ignition coil #1 (coil pack primary)
7 — Ignition coil #2
8 — Ignition coil #3
9 — Ignition coil #4
10 — Camshaft position sensor (signal)
11 — Crankshaft position sensor (signal)
12 — Mass Air Flow (MAF) sensor signal (or MAP on some cars)
13 — Throttle position sensor (TPS) signal
14 — Idle air control / N249 / bypass actuator (depending on fitment)
15 — Engine coolant temperature sensor (signal)
16 — Intake air temperature sensor (IAT) signal (sometimes combined with MAF)
17 — Oxygen sensor bank 1 sensor 1 (pre-cat, narrowband or wideband signal)
18 — Oxygen sensor bank 1 sensor 2 (post-cat)
19 — Knock sensor (signal)
20 — Fuel pump relay control (FP relay drive)
21 — Main relay / ignition switch (switched 12V, ignition on)
22 — Earth / chassis ground
23 — Sensor ground / ECU ground reference
24 — CAN Low (on CAN‑equipped ME7 variants)
25 — CAN High (on CAN‑equipped ME7 variants)
26 — Diagnostic K‑line / serial data (older cars)
27 — Lambda heater relay control (O2 heater supply)
28 — EVAP purge valve control (N80)
29 — Turbo boost control solenoid (N75/N249 family)
30 — Secondary air injection control (where fitted)
31 — A/C compressor clutch request (signal output)
32 — Radiator fan request (thermo fan command)
33 — Intake cam phaser control (VVT solenoid)
34 — Exhaust cam phaser control (if applicable)
35 — Immobilizer / transponder antenna input (immobilizer status)
36 — Tacho output (rev signal for dash)
37 — Alternator sense / charge warning input
38 — Brake signal / clutch switch input (cruise/idle conditions)
39 — Cruise control enable / set signal
40 — GND (additional)
41 — Not used / reserved
42 — Not used / reserved
43 — Not used / reserved
44 — Not used / reserved
45 — CAN wake / bus wake input (on some vehicles)
46 — Fuel pressure sensor (signal)
47 — Secondary injector drivers (on some variants)
48 — Boost pressure sensor (MAP) supply or signal (depending on sensor wiring)
49 — Knock control ground / shield drain
50 — ECU case ground
51 — Lambda sensor ground reference
52 — Alternator lamp / generator field control input
53 — Cold start injector / auxiliary injector (on some models)
54 — Wideband O2 heater ground (on Bosch LSU-equipped units)
55 — Not used / vendor options
56 — Not used / vendor options
57 — Not used / vendor options
58 — Not used / vendor options
59 — Not used / vendor options
60 — Not used / vendor options

The ME7.4.5 pinout refers to the specific configuration of pins on a Bosch ME7.4.5 engine control unit (ECU). This ECU is widely used in various vehicles, and understanding its pinout is essential for tuning, troubleshooting, and modifying engine performance. The Bosch ME7

Bosch ME7.4.5 ECU , primarily used in PSA vehicles (Peugeot and Citroën) with 1.6L 16V engines, the following pinout configuration is used for bench reading and bootstrap mode: Main Connector Pinout (Plug C) These connections are used for standard bench operations: Power Supply (+12V): Ignition (+12V): Ground (GND): K-Line (Data): Bootstrap Mode Connection To put the ECU into 1 — Battery + (permanent 12V) 2 —