DME  ·  14. November 2025

DME MSS54 (S54) Pinout. Schematic Diagram

Complete Pinout Diagram and Wiring Schematic for the BMW DME MSS54 (S54 Engine). This is the essential technical reference for diagnosing the complex electronics of the high-revving S54 engine (M3 E46, Z4 M). BMW Z3 Roadster (E36/7 The guide includes detailed pin assignments for:

  • Six Individual Throttle Bodies (ITBs) Control.

  • Full wiring schematics to troubleshoot intermittent misfires and sensor faults.

  • Double VANOS Actuation (intake and exhaust).

  • Knock Sensors and High-Speed CAN-Bus communication.

  • Detailed Pinout Table for the multi-connector ECU, listing all input and output signals.

Ideal for advanced diagnostics, wiring harness repair, and engine swap projects on S54-equipped vehicles, ensuring the engine performs to factory M-specification.

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DME MSS54 (S54) Pinout. Schematic Diagram
BMW Z3 Roadster (E36/7) Z3 Roadster, Z3 Coupe, M Roadster, M Coupe. 2000-2002
MSS54.pdf
Adobe Acrobat Document 8.1 MB
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DME MSS54 Pinout

  • A = X60001 9 Pins, black
  • B = X60002 24 Pins, black
  • C = X60003 52 Pins, black
  • D = X60004 40 Pins, black
  • E = X60005 9 Pins, black

  • E = Input 

  • A = Output 

  • M = Ground 

  • E/A = Input/Output 

X60001

Pin Type Signal Description/Function Connection
1 A 15 Activate relay Relay, injection valves
2 A P_DKSM+ Voltage supply Electric throttle motor
3     Not used  
4 M 31E Ground Ground point
5 M 31L Ground Ground point
6 M 31L Ground Ground point
7 E 30 Voltage supply B+ junction point E-box
8 E U_HR<2 Voltage supply Fuse holder in E-box, fuse F202
9 M P_DKSM– Ground Electric throttle motor

X60002

Pin Type Signal Description/Function Connection
1 M T_LHV1 Oxygen sensor heating ground Oxygen sensor 1 (in front of catalytic converter)
2     Not used  
3     Not used  
4     Not used  
5 M M_CAN Ground Oxygen sensors, exhaust temperature sensor
6     Not used  
7 M T_LHH1 Oxygen sensor heating ground Oxygen sensor 1 (behind catalytic converter)
8     Not used  
Pin Type Signal Description/Function Connection
9     Not used  
10 E A_TABGAS Temperature signal Exhaust temperature sensor
11 A A_PEKP Activate relay Electrical fuel pump relay, timed
12 A S_EBOX Signal E-box fan E-box fan
13 M T_LHV2 Oxygen sensor heating ground Oxygen sensor 2 (in front of catalytic converter)
14 E A_LSV1 Sensor signal Oxygen sensor 1 (in front of catalytic converter)
15 E A_LSV2 Sensor signal Oxygen sensor 2 (in front of catalytic converter)
16 E A_LSH1 Sensor signal Oxygen sensor 1 (behind catalytic converter)
17     Not used  
18 E A_LSH2 Sensor signal Oxygen sensor 2 (behind catalytic converter)
19 M T_LHH2 Oxygen sensor heating ground Oxygen sensor 2 (behind catalytic converter)
20 E S_KUPPLU Clutch pedal depressed Clutch switch
21     Not used  
22     Not used  
23 A S_HR Activate relay Engine control module relay
24     Not used  

X60003

Pin Type Signal Description/Function Connection
1 E A_HFM Signal air mass meter Hot film air mass meter
2 E P_NWGA1 Signal camshaft position Camshaft position sensor 2 (outlet)
3     Not used  
4 A TNWE_F1 Activate valve Variable camshaft control valve (inlet) - advance
5 E P_NWGE1 Signal camshaft position Camshaft position sensor 1 (inlet)
6 E P_NWGA1 Signal camshaft position Camshaft position sensor 2 (outlet)
Pin Type Signal Description/Function Connection
7 A U_DKG1 Voltage supply Electric throttle motor, hot film air mass meter
8 E P_KWG Signal crankshaft position Crankshaft position sensor
9     Not used  
10 E A_EDRP Throttle position signal Electric throttle motor
11     Not used  
12     Not used  
13 E S_61–1 Charge signal Generator
14 A U_DKG2 Voltage supply Throttle position sensor
15     Not used  
16     Not used  
17 M M_HFM Ground Hot film air massmeter
18     Not used  
19 E S_RDKS Teach-in process Pushbutton, tire pressure warning system
20 M M_DKG1/2 Ground Throttle position sensor, electric throttle motor
21 M M_KWG Ground Crankshaft position sensor
22 E A_TANS Temperature signal intake air Hotfilm air mass meter
23 E A_DKG1 Throttle position signal Throttle position sensor
24 E A_TMOT Temperature signal Engine coolant temperature sensor
25 M 31_ANA Ground Various sensors
26 E A_QLD Oil pressure signal Oil pressure switch
27     Not used  
28     Not used  
29 E A_KS1 Knock sensor signal Cyl. 1–2 knock sensor
30 E A_KS3 Knock sensor signal Cyl. 3–4 knock sensor
31 E A_KS2 Knock sensor signal Cyl. 5–6 knock sensor
32     Not used  
33 A P_EVZ1 Activate valve Cyl. 1 fuel injection valve
34 A P_EVZ2 Activate valve Cyl. 2 fuel injection valve
35 A P_EVZ3 Activate valve Cyl. 3 fuel injection valve
36 A P_EVZ4 Activate valve Cyl. 4 fuel injection valve
Pin Type Signal Description/Function Connection
37 A P_EVZ5 Activate valve Cyl. 5 fuel injection valve
38 A P_EVZ6 Activate valve Cyl. 6 fuel injection valve
39 E F_OLN Oil level/temperature signal Thermal oil level switch
40     Not used  
41     Not used  
42 A T_TEV Activate valve Evaporative emission valve
43 A T_NWA_S1 Activate valve Variable camshaft control valve (outlet) – retard
44 A T_NWA_F1 Activate valve Variable camshaft control valve (outlet) – advance
45 A S_DMTL–LED Tire pressure warning lamp control Instrument cluster
46 A T_LLFSS CLOSE signal Idle speed control valve
47 A T_LLFSO OPEN signal Idle speed control valve
48     Not used  
49     Not used  
50 A T_NWE_S1 Activate valve Variable camshaft control valve (inlet) – retard
51 A S_SSP Activate valve Solenoid valve, sucking jet pump
52     Not used  

X60004

Pin Type Signal Description/Function Connection
1 A 61 Battery charge indicator Instrument cluster
2     Not used  
3 A S_SLP Activate relay Secondary air pump relay
4 E ELUE Signal, auxiliary fan ON High speed relay
5     Not used  
6 E S_50 Signal start Fuse 15
7 M M_FW1 Ground Pedal position sensor
8 E A_FW1 Signal, pedal position 1 Pedal position sensor
9 A U_FW1 Voltage supply Pedal position sensor
10     Not used  
Pin Type Signal Description/Function Connection
11 A OELD Signal, oil pressure Instrument cluster
12 M M_FW2 Ground Pedal position sensor
13 E A_FW2 Signal, pedal position 2 Pedal position sensor
14 A U_FW2 Voltage supply Pedal position sensor
15     Not used  
16     Not used  
17 A TD Crankshaft RPM speed signal (TD) Electronic immobilizer control module (EWS III)
18     Not used  
19 E RFL Reversing light signal Reversing light switch
20 A TOG Signal oil level Thermal oil level switch
21     Not used  
22 E DFAHR Speed signal right rear Dynamic stability control unit
23     Not used  
24 E KL 54 ON Brake signal Brake light switch
25     Not used  
26 E 15A26 Terminal 15 Fuse 26
27 E MFL Cruise control signal Cruise control interface
28 E A_S_LDPV Leakage diagnosis Leakage diagnosis pump
29 A KOREL Activate relay Compressor control relay
30 E A_T_LDP Leakage diagnosis Leakage diagnosis pump
31     Not used  
32 E/A TXDII TXD diagnosis data link Data link connector
33 E S_DWA Drive-away protection signal (code) Electronic immobilizer control module (EWS III)
34 E S_BLTS Signal test Brake light switch
35 M 31 Ground Cruise control interface
36 E/A CAN+ CAN-bus High Splice, CAN-bus High
37 E/A CAN– CAN-bus Low Splice, CAN-bus Low
38     Not used  
39     Not used  
40     Not used  

X60005

Pin Type Signal Description/Function Connection
1 A P_ZSZ1 Ignition coil signal Cyl. 1 ignition coil
2 A P_ZSZ2 Ignition coil signal Cyl. 2 ignition coil
3 A P_ZSZ3 Ignition coil signal Cyl. 3 ignition coil
4     Not used  
5 M 31L Ground Ground point
6 A P_ZSZ5 Ignition coil signal Cyl. 5 ignition coil
7 A P_ZSZ6 Ignition coil signal Cyl. 6 ignition coil
8     Not used  
9 A P_ZSZ4 Ignition coil signal Cyl. 4 ignition coil

  • E = Input 

  • A = Output 

  • M = Ground 

  • E/A = Input/Output 

Tags: BMW MSS54 Pinout, BMW S54 Wiring Diagram, MSS54 DME Pinout, S54 Engine Wiring Schematic, MSS54 CAN-Bus Diagram, MSS54 DME Sensor Wiring, BMW Z4 M Roadster Pinout, BMW Z3 Roadster (E36/7)