BMW M52 MaxxECU Sport PNPECU Wiki V4

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PNPECU MaxxECU M52 MS41 solution

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This page refers to version 4 PNPECU M52 solution only. Make sure to check the adapter tag for your version.
This is not compatible with 320i Siemens ECUs which have different wiring, please contact us if you want such an adapter.

11/1/2023 - Version 4 is latest.

PNPECU has developed the M52 solution to satisfy customer requests to allow the M52 engine to be fully controlled.

Adapter extra connector information

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• 18 pin Auxiliary connector part numbers
  • Connector - https://www.te.com/usa-en/product-1-962692-2.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 4HP/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!

M52 OEM Sensors Usage

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• MAF is not used
• Lambda sensors are not used
• Air temp sensor is not used - new fast sensor is supplied
• Camshaft sensor is not compatible - recommended is to fit a M54 sensor - not crucial for normal operation, vanos still works.


• 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
• Knock sensors - used as OEM

M52 OEM Actuator Usage

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• Ignition coil wiring - as stock as the adapter has integrated ignition drivers
• Tachometer signal
• Fuel pump relay
• Idle control valve
• Vanos advance
• Check engine indicator
• AC Compressor relay
• Fuel consumption output

CAN BUS Compatibility

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The E36/E34/E38 the M52 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 M52 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
• Stock - the ignition driver box is setup to be used with stock coils
• Smart - the ignition driver box is setup to be used with smart coils like R8 coils



Ignition box information

ECU Model
• Sport - 8 Analog inputs are spare, 1 Digital input is spare, 1 Low side output are spare, CANBUS is spare


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

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

Sport adapter pinout information

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Below is the pin functions of the M52 V4 adapter for the MaxxECU Sport.

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	VANOS
B2	IGN 3
B3	IGN 4
B4	GPO 1	FUEL PUMP RELAY
C1	AIN 5	Spare output AUX18-12
C2	IGN 5
C3	IGN 6
C4	GPO 2	Spare output
D1	WBO2 Heater
D2	AIN 6	Spare output AUX18-13
D3	AIN 7	Spare output AUX18-14
D4	GPO 3	IAC OPEN
E1	CAN High	Spare AUX18-5
E2	CAN Low	Spare AUX18-6
E3	GND Shield
E4	AIN 8	Spare AUX18-15
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 AUX18-8
J2	AIN 2	Spare AUX18-9
J3	AIN 3	Spare AUX18-10
J4	AIN 4	Spare AUX18-11
K1	INJ 1
K2	INJ 2
K3	DIN/VR 1	Spare AUX18-7
K4	DIN/VR 2	VSS
L1	GPO 11	Spare AUX18-16
L2	GPO 12	FUEL CONSUMPTION
L3	INJ 6
L4	Power GND
M1	INJ 3
M2	INJ 4
M3	INJ 5
M4	12V

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	DIN 1
8	ANALOG IN 1
9	ANALOG IN 2
10	ANALOG IN 3
11	ANALOG IN 4
12	ANALOG IN 5
13	ANALOG IN 6
14	ANALOG IN 7
15	ANALOG IN 8
16	GPO 11
17
18

Ignition box connector - 8pin ECU side

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
8

Ignition box connector - 12pin engine sie

Pin number	Function	Information
1	IGN 1 COIL
2	IGN 2 COIL
3	IGN 3 COIL
4	IGN 4 COIL
5	IGN 5 COIL
6	IGN 6 COIL
7
8
9	POWER GROUND
10	POWER GROUND
11
12

AIR TEMP CONNECTOR EXTENSION - 2pin

Pin number	Function	Information
1	AIR TEMP SIGNAL
2	ANALOG GROUND

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Last change 22.04.2024, 17:17:49