BMW S54 PNPECU Wiki V2

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PNPECU MaxxECU S54B32 Race solution

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This page refers to version 2 PNPECU S50B32 solution only. Make sure to check the adapter tag for your version.

16/12/2022 - Version 4 is latest.

PNPECU has developed the S54B32 solution to satisfy customer requests to allow the S54B32 engine to be fully controlled

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!

S54B32 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
• CAT Exhaust temp sensor

• Camshaft signals - used as OEM
• Coolant temperature - used as OEM
• TPS sensors - used as OEM
• Pedal position sensors
• Radiator output temp sensor - used as OEM
• Brake light - used as OEM
• Clutch switch - used as OEM
• Steering wheel switches - used as OEM
• Dynamic switch - used as OEM
• Vehicle Speed Sensor Rear Right - used for vehicle speed
• AC signals from vehicle - used as OEM
• Oil level switch - used as OEM

S50B32 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 for both cams
• DBW Motor
• Dynamic Switch LED
• Fuel tank vent valve

CAN BUS Compatibility

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The E46 the S54 originally came in did communicate with the rest of the vehicle via CAN BUS. Thanks to the MaxxECU it is possible to fit the engine into other BMWs also 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 S54B32 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

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 pinout information

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Below are the pin functions of the S50B32 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	FUEL PUMP
A2	IGN 1
A3	IGN 2
A4	GPO 8	TACHO
B1	GPO 6	ENGINE FAN PWM
B2	IGN 3
B3	IGN 4
B4	GPO 1	AC CLUTCH RELAY
C1	GPO 7	Spare output
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	FUEL TANK VENT VALVE
E1	CAN High	Spare
E2	CAN Low	Spare
E3	GND Shield
E4	GPO 4	DYNAMIC SWITCH LED
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	CRANK SENSOR SIGNAL
H4	Home	EXHAUST VANOS TRIGGER
J1	AIN 1	RADIATOR OUT TEMP SIGNAL
J2	AIN 2	DYNAMIC SWITCH
J3	AIN 3	TPS2
J4	AIN 4	OEM MAP
K1	INJ 1
K2	INJ 2
K3	DIN/VR 1	VANOS INTAKE CAM POSITION
K4	DIN/VR 2	BRAKE SWITCH
L1	INJ 8	IAC CLOSE
L2	INJ 7	IAC OPEN
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	PPS2
F1	AIN 7	STEERING WHEEL SWITCHES
F2	AIN 8	CLUTCH SWITCH
F3	DIN/VR 4	VSS
F4	DIN/VR 5	OIL LEVEL
G1	GPO 15	VANOS INTAKE ADVANCE SOLENOID
G2	GPO 16	VANOS INTAKE RETARD SOLENOID
G3	AIN 5	PPS1
G4	Power GND
H1	GPO 14	VANOS EXHAUST RETARD SOLENOID
H2	GPO 11	DBW MOTOR-
H3	GPO 13	VANOS EXHAUST ADVANCE SOLENOID
H4	GPO 12	DBW MOTOR+

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, 08:52:51