BMW M43 BMS46 V4

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PNPECU EMU Black M43 BMS46 solution

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This page refers to version 4 PNPECU M43 solution only. Make sure to check the adapter tag for your version.

30/7/2024 - Version 4 is latest.

PNPECU has developed the M43 solution to satisfy customer requests to allow the M43 engine to be fully controlled

Adapter extra connector information

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See bottom of this page for the pinouts of these auxiliary connectors

• 18 pin Auxiliary connector part numbers
  • Connector - https://www.te.com/usa-en/product-1355348-1.html
  • Cover - https://www.te.com/usa-en/product-1-1355350-1.html
  • Terminals - https://www.te.com/usa-en/product-5-963716-1.html

M43 OEM Sensors Usage

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• OEM Lambda sensors are not used
• MAF sensor is not used



• Crank sensor - used as OEM
• Cam sensor - used as OEM
• Coolant temperature - used as OEM
• Air temp sensor - used as OEM
• TPS sensor - used as OEM
• Vehicle Speed Sensor Rear Right - used for vehicle speed
• Knock sensors - used as OEM
• Engine oil pressure switch - used as OEM
• Oil level switch - used as OEM

M43 OEM Actuator Usage

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• Secondary air pump - not used
• Secondary air valve - not used



• Ignition coil wiring - used as OEM
• Tachometer signal - used as OEM
• Fuel pump relay - used as OEM
• Idle control valve - used as OEM
• AC Compressor relay - used as OEM
• Econometer output - used as OEM
• DISA Valve - used as OEM

CAN BUS Compatibility

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The cars that the M43 BMS46 originally came in did communicate with the rest of the vehicle via CAN BUS.
Use E46 canbus setup in the ecu

Options at ordering

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Not everyone is going to need or want the same thing with their ECU conversion.

ECU Model
• Black - 6 x Analog inputs are spare, 2 x H bridges are free , 1 x Switch input is free



Injector
This is a selectable option so that the webstore doesn´t incorrectly calculate shipping cost

EMU Black adapter pinout information

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Below is the pin functions of the M43 V4.0 BMS46 adapter.

EMU Black Connector 1 - 39pin - GREY

Pin number	Function	Information
1	IGN 5
2	EGT 1+	Not wired
3	KNOCK 1
4	ANALOG 2	Spare input Aux 18/18
5	COOLANT TEMP SENSOR
6	WBO2 VS
7	CAMSYNC 2	Spare input
8	PRIMARY TRIGGER
9	FLEX FUEL	Spare input Aux 18/9
10	SWITCH 1	EOP SWITCH
11	RS232TXD
12	CAN H	Spare Aux 18/5
13	BATTERY 12V
14	IGN 4
15	EGT2+	NoT wired
16	KNOCK 2
17	ANALOG 3	Spare input Aux 18/11
18	TPS-IN
19	WBO IP
20	VSS
21	CAMSYNC 1
22	WBO RCAL
23	SWITCH 2	OIL LEVEL SWITCH
24	RS232RXD
25	CAN LOW	Spare Aux 18/6
26	5V SUPPLY
27	PWR GND
28	ECU GND
29	Sensor GND
30	ANALOG 4	Spare input Aux 18/12
31	ANALOG 1	Spare input Aux 18/13
32	AIR TEMP SENSOR
33	WBO2 VGND
34	5V SUPPLY
35	ANALOG 5	Spare input Aux 18/7
36	SWITCH 3	Spare input Aux 18/10
37	ANALOG 6	Spare input Aux 18/14
38	SENSOR GND
39	SENSOR GND

EMU Black Connector 2 - 24pin - BLACK

Pin number	Function	Information
1	IGN 6	AC Compressor relay
2	H-BRIDGE 1+	Spare output Aux 18/15
3	H-BRIDGE 2+	Spare output Aux 18/17
4	AUX 6	FAN PWM
5	AUX 3	E-STAT
6	INJ 4
7	INJ 1
8	IGN 1
9	IGN 3
10	H-BRIDGE 1-	Spare output Aux 18/16
11	H-BRIDGE 2-	Spare output Aux 18/18
12	AUX 5	IDLE OPEN
13	AUX 2	MAIN RELAY
14	INJ 5	TACHO
15	INJ 2
16	IGN 2
17	PWR GND
18	IGN 12
19	WBO HEATER
20	AUX 4	IDLE CLOSE
21	AUX 1	FUEL PUMP RELAY
22	INJ 6	DISA VALVE
23	INJ 3
24	PWR GND

Auxiliary connector - 18pin

Pin number	Function	Information
1	12V SUPPLY
2	5V SUPPLY
3	ANALOG GROUND
4	POWER GROUND
5	CAN HIGH
6	CAN LOW
7	ANALOG 5
8	ANALOG 2
9	FLEX FUEL
10	SWITCH 3
11	ANALOG 3
12	ANALOG 4
13	ANALOG 1
14	ANALOG 6
15	H-BRIDGE 1+
16	H-BRIDGE -1
17	H-BRIDGE 2+
18	H-BRIDGE 2-

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Last change 28.08.2024, 10:53:37