BMW S50B30 PNPECU Wiki V2

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PNPECU MaxxECU S50B30 EURO solution

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This page refers to version 2 PNPECU S50B30 EURO solution only. Make sure to check the adapter tag for your version.

18/1/2023 - Version 4 is latest.

PNPECU has developed the S50B30 solution to satisfy customer requests to allow the S50B30 engine to be fully controlled, the PNP kit now controls the vanos directly while in the OEM manner it was done through the VNC box which is no longer required.

Adapter extra connector information

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• 14 Pin Injector loom connector part numbers
  • Connector - https://www.te.com/usa-en/product-936126-1.html
  • Terminals - https://www.te.com/usa-en/product-5-963716-1.html

Transmission compatibility

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This is a complicated subject as at the time of writing there are solutions for external control of DCT, 6HP and 8HP transmissions out of BMWs, at the same time MaxxECU provides it´s standardized can bus output which multiple transmission controllers are able to make use of for just about any transmission out there.

There is no direct support for the original 6HP BMW TCU and is very unlikely it will ever exist.

For direct PNP communications with a stock BMW DCT transmission with a BMW TCU refer to this page - https://www.maxxecu.com/webhelp/advanced-bmw_dct.html

what this means is that the BMW TCU believes it´s listening and talking to an OEM BMW DME.
The MaxxECU is not directly controlling the transmission but sending and receiving signals that emulate the BMW DME.

MaxxECU is working on adding other BMW newer transmissions to the emulation compatibility list.

100% compatible with all manual gearboxes!

S50B30 EURO OEM Sensors Usage

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• MAF is not used
• Pre cat lambda sensors are not used
• Post cat sensors are not used
• Air temp sensor is not used - new fast sensor is supplied
• Knock sensors - knock for cylinders 3/4 are not used as only two inputs exist in the MaxxECU


• Camshaft signals - used as OEM
• Coolant temperature - used as OEM
• TPS sensor - used as OEM
• Vehicle Speed Sensor Rear Right - used for vehicle speed
• AC signals from vehicle - used as OEM

S50B30 EURO OEM Actuator Usage

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• Ignition coil wiring - see options below for more details
• Tachometer signal
• Electric fan
• Fuel pump relay
• Idle control valve
• Vanos advance and retard solenoids
• Check engine indicator

CAN BUS Compatibility

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The E36 the S50B30 originally came in did not communicate with the rest of the vehicle via CAN BUS. However thanks to the MaxxECU it is possible to fit the engine into other BMWs that require information via CAN BUS

5/11/2022 -
• E46 - compatible with BMWs of similar vintage
• E39 - compatible with BMWs of similar vintage
• E9x - compatible with BMWs of similar vintage

MaxxECU provides OEM BMW CAN BUS output for the above BMW vehicles. It also supports a vast array of other cars which a S50B30 can be fitted to thanks to that. Refer to this webpage for latest options and relevant information - https://maxxecu.com/webhelp/can-oem.html

Options at ordering

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

Ignition outputs
• Smart coils - Customer will install logic coils in place of original coil wiring
• IGBT Output box - Stock coils can be retained
• VAG R8 coils and connectors - PNPECU supplied R8 coils, customer will install the coils into the original coil wiring or add their own wiring
• VAG R8 coils and connectors - PNPECU supplied R8 coils, coil adapters also for PNP fitment

ECU Model
• Race - All EGT inputs are spare, 7 Analog inputs are spare, 1 Digital input is spare, 1 Low side output is spare, 1 High side output is spare, 2 Logic level outputs are available, 2 H-bridges are available
• Pro - Undetermined

MaxxECU DCT Adapter loom
This is a selectable option so that the webstore doesn´t incorrectly calculate shipping cost

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

• Single is for when you are planning to monitor pre turbine inlet temperature
• Dual is for when you are planning to monitor pre turbine inlet temperature on a twin setup or each side of the engine
• Six is for when you are planning to monitor individual cylinder temperatures

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

Race adapter without ignition box pinout information

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Below is the pin functions of the S50B30 EURO V2 adapter. The ignition option dictates if the Molex connector is in the adapter or not.

Race Connector 1 - 48pin

Pin number	Function	Information
A1	GPO 5	IAC CLOSE
A2	IGN 1
A3	IGN 2
A4	GPO 8 / Tacho output
B1	GPO 6	CHECK ENGINE LIGHT
B2	IGN 3
B3	IGN 4
B4	GPO 1	FUEL PUMP RELAY
C1	GPO 7	AUXILIARY FAN
C2	IGN 5
C3	IGN 6
C4	GPO 2	Spare output
D1	WBO2 Heater
D2	IGN 7	Spare output 0/5v
D3	IGN 8	Spare output 0/5v
D4	GPO 3	IAC OPEN
E1	CAN High	Spare
E2	CAN Low	Spare
E3	GND Shield
E4	GPO 4	AC CLUTCH RELAY
F1	Coolant temp input
F2	Air temp input
F3	WBO2 VREF
F4	WBO2 VS
G1	5V Supply output
G2	TPS
G3	WBO2 IP
G4	WBO2 RCAL
H1	Sensor GND
H2	Trigger GND
H3	Trigger
H4	Home
J1	AIN 1	Spare input
J2	AIN 2	Spare input
J3	AIN 3	Spare input
J4	AIN 4	Spare input
K1	INJ 1
K2	INJ 2
K3	DIN/VR 1	VANOS INTAKE CAM POSITION
K4	DIN/VR 2	VSS
L1	INJ 8	VANOS ADVANCE SOLENOID
L2	INJ 7	VANOS RETARD SOLENOID
L3	INJ 6
L4	Power GND
M1	INJ 3
M2	INJ 4
M3	INJ 5
M4	12V

Race Connector 2 - 32pin

Pin number	Function	Information
A1	EGT 5+
A2	EGT 6+
A3	EGT 7+
A4	EGT 8+
B1	EGT 5-
B2	EGT 6-
B3	EGT 7-
B4	EGT 8-
C1	EGT 1+
C2	EGT 2+
C3	EGT 3+
C4	EGT 4+
D1	EGT 1-
D2	EGT 2-
D3	EGT 3-
D4	EGT 4-
E1	Knock GND
E2	Knock 1
E3	Knock 2
E4	AIN 6	Spare input
F1	AIN 7	Spare input
F2	AIN 8	AC REQUEST
F3	DIN/VR 4	Spare input
F4	DIN/VR 5	AC PRESSURE SWITCH
G1	GPO 15	FUEL CONSUMPTION OUTPUT
G2	GPO 16	Spare output
G3	AIN 5	Spare input
G4	Power GND
H1	GPO 14	Spare output
H2	GPO 11	Spare output
H3	GPO 13	Spare output
H4	GPO 12	Spare output

Auxiliary connector - 14pin without ignition Box

Pin number	Function	Information
1	12V SUPPLY
2	5V SUPPLY
3	ANALOG GROUND
4	POWER GROUND
5	CAN HIGH
6	CAN LOW
7	ANALOG IN 1
8	ANALOG IN 2
9	ANALOG IN 3
10	GPO 2
11	ANALOG IN 4
12	DIGITAL IN 4
13	GPO 11	H BRIDGE OUTPUT
14	GPO 12	H BRIDGE OUTPUT

Ignition box connector - 20pin

Pin number	Function	Information
1	IGN 1 FROM ECU
2	IGN 2 FROM ECU
3	IGN 3 FROM ECU
4	IGN 4 FROM ECU
5	IGN 5 FROM ECU
6	IGN 6 FROM ECU
7	IGN 7 FROM ECU
8	IGN 8 FROM ECU
9	POWER GROUND
10	12+
11	IGNITION COIL 1
12	IGNITION COIL 2
13	IGNITION COIL 3
14	IGNITION COIL 4
15	IGNITION COIL 5
16	IGNITION COIL 6
17	IGNITION COIL 7	Spare low side output
18	IGNITION COIL 8	Spare low side output
18	POWER GROUND
20	POWER GROUND

AIR TEMP CONNECTOR EXTENSION - 2pin

Pin number	Function	Information
1	AIR TEMP SIGNAL
2	ANALOG GROUND

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Last change 08.04.2024, 08:52:47