BMW M52 MaxxECU Race PNPECU Wiki V3
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PNPECU MaxxECU M52 MS41 solution
This page refers to version 3 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.
13/12/2022 - Version 3 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
• 8 pin Auxiliary connector part numbers
• Connector -
https://www.te.com/usa-en/product-284869-1.html
• Terminals -
https://www.te.com/usa-en/product-5-963716-1.html
• 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
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
• 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
• Ignition coil wiring - see options below for more details
• Tachometer signal
• Fuel pump relay
• Idle control valve
• Vanos advance
• Check engine indicator
• AC Compressor relay
• Fuel consumption output
CAN BUS Compatibility
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
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, 8 Analog inputs are spare, 1 Digital input is spare, 3 Low side outputs are 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 pinout information
Below is the pin functions of the M52 V3 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 |
VANOS |
B2 |
IGN 3 |
|
B3 |
IGN 4 |
|
B4 |
GPO 1 |
FUEL PUMP 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 |
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 |
Spare Digital input |
K4 |
DIN/VR 2 |
VSS |
L1 |
INJ 8 |
Spare output |
L2 |
INJ 7 |
CHECK ENGINE LIGHT |
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 |
Spare input |
F3 |
DIN/VR 4 |
AC REQUEST |
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 |
POWER GROUND |
|
4 |
ANALOG 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 |
GPO 7 |
|
13 |
GPO 2 |
|
14 |
INJ8 |
|
Auxiliary connector - 8pin
Pin number |
Function |
Information |
1 |
DBW+ |
GPO 11 |
2 |
DBW- |
GPO 12 |
3 |
ANALAOG IN 5 |
|
4 |
ANALAOG IN 6 |
|
5 |
ANALAOG IN 7 |
|
6 |
ANALAOG IN 8 |
|
7 |
5V |
|
8 |
ANALOG GROUND |
|
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 |
|
Last change 08.04.2024, 08:52:38