Not confident with automotive wiring? Have a professional harness builder or tuner do it, or check your work before first power-up. A wiring mistake can damage the ECU, the engine or the car, or start a fire.
100%
Stock ECU being replaced
MS3PROMINI-A-4 Fuel pump out
MS3PROMINI-A-3 PWM out 1 / Idle
MS3PROMINI-A-29 Digital switched in 1 / Flex fuel
MS3PROMINI-A-9 Injector out E
MS3PROMINI-A-6 Injector out B
MS3PROMINI-A-35 Digital frequency in 2 (Hall)
MS3PROMINI-A-34 Digital frequency in 1 (Hall)
MS3PROMINI-A-7 Injector out C
OEM-1
Stock ECU being replaced
ACooling fan relay (low-side)
BA/C condenser fan relay
CStarter input (12V while cranking)
ECheck engine light (MIL)
GA/C clutch relay
KA/C pressure switch (A/C request)
MVehicle speed sensor (VSS)
UFuel pump relay (low-side)
MS3PROMINI-A-13 Analog in 1
MS3PROMINI-A-16 Analog in 4
MS3PROMINI-A-28 TPS in
MS3PROMINI-A-26 CLT in
MS3PROMINI-A-14 Analog in 2
5V ref
MS3PROMINI-A-27 IAT in
MS3PROMINI-A-8 Injector out D
MS3PROMINI-A-15 Analog in 3
0V sensor
OEM-3
Stock ECU being replaced
BMAF sensor input
CFront O2 sensor input
FThrottle position (TPS)
GEngine coolant temp (CLT)
HEGR boost sensor
I+5V sensor reference
KIntake air temp (IAT)
MFront O2 heater control
NEGR boost sensor (2nd channel)
OSensor ground
GND
ECU power +12V (main relay)
GND
GND
MS3PROMINI-A-30 CKP+
MS3PROMINI-A-33 CMP-
MS3PROMINI-A-32 CMP+
0V sensor
GND
MS3PROMINI-A-17 Spark out A
MS3PROMINI-A-18 Spark out B
MS3PROMINI-A-10 Injector out F
MS3PROMINI-A-11 Injector out G
MS3PROMINI-A-12 Injector out H
MS3PROMINI-A-5 Injector out A
OEM-4
Stock ECU being replaced
AChassis ground
BECU power +12V (main relay)
CChassis ground
DChassis ground
ECrank position (CKP) sensor
FCAS SGT (cam trigger)
GCAS SGC (cam sync)
HCrank pickup timing ground (CKP gnd)
KChassis ground
NIgnition coil trigger (cyl 1&4)
RIgnition coil trigger (cyl 2&3)
UInjector 1 (cyl 1)
VInjector 2 (cyl 2)
WInjector 3 (cyl 3)
XInjector 4 (cyl 4)
MS3PROMINI
MS3PROMINI-A
MS3PROMINI
112V+ switched power in
2+5V VREF out
3PWM out 1 / Idle
4Fuel pump out
5Injector out A
6Injector out B
7Injector out C
8Injector out D
9Injector out E
10Injector out F
11Injector out G
12Injector out H
13Analog in 1
14Analog in 2
15Analog in 3
16Analog in 4
17Spark out A
18Spark out B
21Sensor ground
22Power ground
23Power ground
26CLT in
27IAT in
28TPS in
29Digital switched in 1 / Flex fuel
30CKP+
32CMP+
33CMP-
34Digital frequency in 1 (Hall)
35Digital frequency in 2 (Hall)
12V+ switched power in
5V ref
OEM-1-B A/C condenser fan relay
OEM-1-A Cooling fan relay (low-side)
OEM-4-X Injector 4 (cyl 4)
OEM-1-G A/C clutch relay
OEM-1-U Fuel pump relay (low-side)
OEM-3-M Front O2 heater control
OEM-1-E Check engine light (MIL)
OEM-4-U Injector 1 (cyl 1)
OEM-4-V Injector 2 (cyl 2)
OEM-4-W Injector 3 (cyl 3)
OEM-3-B MAF sensor input
OEM-3-H EGR boost sensor
OEM-3-N EGR boost sensor (2nd channel)
OEM-3-C Front O2 sensor input
OEM-4-N Ignition coil trigger (cyl 1&4)
OEM-4-R Ignition coil trigger (cyl 2&3)
0V sensor
GND
GND
OEM-3-G Engine coolant temp (CLT)
OEM-3-K Intake air temp (IAT)
OEM-3-F Throttle position (TPS)
OEM-1-C Starter input (12V while cranking)
OEM-4-E Crank position (CKP) sensor
OEM-4-G CAS SGC (cam sync)
OEM-4-F CAS SGT (cam trigger)
OEM-1-M Vehicle speed sensor (VSS)
OEM-1-K A/C pressure switch (A/C request)
SP-14V · 3 pins
SP-0V · 4 pins
SP-GND · 7 pins
Press enter or space to select a node. You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.
Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.