This page is a technical guide for the Siemens MS41.1 Digital Engine Management (DME) module, which was installed on the BMW M52 (and S52 in North America) inline-six engines with Single-VANOS (single-valve angle adjustment).
Main Contents
- DME MS41.1 Pinout: This is a complete list or table showing the function of each pin on the control unit connectors.
- Schematic Diagram: A supplementary electrical diagram showing how these DME pins are connected to other vehicle components.
- Diagnostics: Allows you to check the integrity of wiring and the consistency of signals going to and from components such as crankshaft and camshaft sensors, injectors, ignition coils, and others.
- Repair and Modifications: Indispensable for electrical repairs, DME replacement, as well as for connecting additional equipment or performing tuning/swapping (e.g., for setting up the EWS immobilizer).
- Signal Identification: Shows which signal is input (E), output (A), or ground (M).
BMW MS41.1 Pinout. M52 Engine
BMW Z3 E36/7 1997+ Schematic Diagram
BMW MS41.1 Pinout. S52 Engine
BMW Z3 E36/7 1999 Schematic Diagram (S52 Engine)
BMW MS41.1 Pinout. M52 Engine
1999 E36 Coupe and Convertible 318is/C, 323is/C, 328is/C, M3
BMW Z3 DME MS41.1 Pinout
- E = Input
- A = Output
- M = Ground
| Pin | Type | Description/Function | Connection |
| 1 | A | Cyl. 2 ignition coil control | Cyl. 2 ignition coil |
| 2 | A | Cyl. 4 ignition coil control | Cyl. 4 ignition coil |
| 3 | A | Cyl. 6 ignition coil control | Cyl. 6 ignition coil |
| 4 | M | Ground | Ground point |
| 5 | A | Cyl. 2 fuel injection valve control | Cyl. 2 fuel injection valve |
| 6 | A | Cyl. 1 fuel injection valve control | Cyl. 1 fuel injection valve |
| 7 | M | Ground | Hot wire air mass meter |
| 8 | E | Hot wire air mass meter | Hot wire air mass meter |
| 9 | E | TI measurement signal (fuel consumption) | Board computer |
| 10 | E | Engine coolant temperature | Engine coolant temperature sensor |
| 11 | E | Fuel tank pressure | Fuel tank pressure sensor |
| 12 | E | Throttle position signal | Throttle position sensor |
| 13 | Not used | ||
| 14 | E | Intake air temperature | Intake air temperature sensor |
| 15 | E | Speed signal right rear | ABS/ASC control module |
| 16 | E | Activate A/C | Pressure switch |
| 17 | Not used | ||
| 18 | E | Drive away protection signal (code) | Electronic immobilizer control module (EWS II) |
| 19 | E | A/C-ON-signal | Air conditioning operating unit |
| 20 | A | "Check engine" indicator control | Instrument cluster |
| 21 | A | Camshaft control | Variable camshaft control valve |
| 22 | A | Cyl. 3 fuel injection valve control | Cyl. 3 fuel injection valve |
| 23 | A | Cyl. 6 fuel injection valve control | Cyl. 6 fuel injection valve |
| 24 | A | Cyl. 4 fuel injection valve control | Cyl. 4 fuel injection valve |
| 25 | M | Oxygen sensor heating ground | Oxygen sensor (in front of catalytic converter) |
| 26 | E | Battery voltage | B+ jump start junction point |
| 27 | A | Activate valve | Idle speed control valve |
| 28 | M | Ground | Ground point |
| 29 | A | Cyl. 1 ignition coil control | Cyl. 1 ignition coil |
| Pin | Type | Description/Function | Connection |
| 30 | A | Cyl. 3 ignition coil control | Cyl. 3 ignition coil |
| 31 | A | Cyl. 5 ignition coil control | Cyl. 5 ignition coil |
| 32 | M | Ground | Ground point |
| 33 | A | Cyl. 5 fuel injection valve control | Cyl. 5 fuel injection valve |
| 34 | M | Ground | Ground point |
| 35 | A | Activate relay | Secondary air pump relay |
| 36 | A | Crankshaft RPM speed signal TD | Instrument cluster |
| 37 | Not used | ||
| 38 | M | Ground | Shield knock sensor |
| 39 | M | Ground | Temperature sensors |
| 40 | M | Ground | Crankshaft position/RPM sensor, Fuel tank pressure sensor |
| 41 | M | Ground | Shield camshaft position sensor |
| 42 | M | Ground | Throttle position sensor |
| 43 | M | Ground | Camshaft position sensor |
| 44 | A | Voltage supply | Throttle position sensor, Fuel tank pressure sensor |
| 45 | A | Throttle position signal | ABS/ASC control module |
| 46 | E | TI measurement signal (fuel consumption) | Instrument cluster |
| 47 | Not used | ||
| 48 | A | Voltage supply | Crankshaft position/RPM sensor |
| 49 | E | Terminal 15 | Ignition switch |
| 50 | A | Running losses | Solenoid valve |
| 51 | A | Activate valve | Charcoal filter shut off valve |
| 52 | A | Signal exhaust flap | Not used |
| 53 | A | Activate valve | Idle speed controle valve |
| 54 | E | Battery voltage, terminal 87 | Engine control module relay |
| 55 | Not used | ||
| 56 | M | Ground | Ground point |
| 57 | E | Cyl. 1–3 knock sensor | Knock sensor |
| 58 | E | Cyl. 1–3 knock sensor | Knock sensor |
| 59 | E | Cyl. 4–6 knock sensor | Knock sensor |
| 60 | E | Programming voltage | Data link connector |
| Pin | Type | Signal | Description/Function | Connection |
| 61 | Not used | |||
| 62 | E | Activate valve | Secondary air pump valve | |
| 63 | E | Cyl. 4-6 knock sensor | Knock sensor | |
| 64 | E | Camshaft position | Camshaft position sensor | |
| 65 | E | Camshaft position | Camshaft position sensor | |
| 66 | Not used | |||
| 67 | M | Oxygen sensor signal ground | Oxygen sensor (in front of catalytic converter) | |
| 68 | E | Activate valve | Evaporative emission valve | |
| 69 | E | Activate relay | Fuel pump relay | |
| 70 | Not used | |||
| 71 | M | Oxygen sensor signal ground | Oxygen sensor (behind catalytic converter) | |
| 72 | Not used | |||
| 73 | E | Activate relay | Engine control module relay | |
| 74 | A | Activate A/C compressor | Compressor control relay | |
| 75 | E | Sensor signal | Oxygen sensor (in front of catalytic converter) | |
| 76 | Not used | |||
| 77 | E | Sensor signal | Oxygen sensor (behind catalytic converter) | |
| 78 | Not used | |||
| 79 | M | Oxygen sensor heating ground | Oxygen sensor (behind catalytic converter) | |
| 80 | A | ASC signal ZA | Slip control module ABS/ASC | |
| 81 | A | ASC signal ZWV | Slip control module ABS/ASC | |
| 82 | A | ASC signal MSR | Slip control module ABS/ASC | |
| 83 | E | Sensor signal | Crankshaft position/RPM sensor | |
| 84 | Not used | |||
| 85 | E/A | CAN LOW | CAN LOW | Transmission control module EGS |
| 86 | E/A | CAN HIGH | CAN HIGH | Transmission control module EGS |
| 87 | E | Battery voltage, terminal 87 | Engine control module relay | |
| 88 | E/A | TxD diagnosis data link | Data link connector |