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
MS3PROEVO-A-32 Digital switched in 1
MS3PROEVO-B-20 Digital switched in 2
RLY1-R-OUT Relay contact output (switched +12 V to load)
RLY2-R-OUT Relay contact output (switched +12 V to load)
OEM-5
Stock ECU being replaced
F2Front VTEC pressure switch
F4Rear VTEC pressure switch
F5Front VTEC solenoid valve
F7Rear VTEC solenoid valve
MS3PROEVO-A-3 Injector out J
MS3PROEVO-B-10 Injector out F
MS3PROEVO-A-4 Injector out I
MS3PROEVO-B-11 Injector out G
MS3PROEVO-B-1 Injector out A
MS3PROEVO-B-12 Injector out H
MS3PROEVO-A-29 PWM out 2
MS3PROEVO-A-28 Fuel pump relay out
MS3PROEVO-B-4 Injector out C
MS3PROEVO-C-2 PWM out 4
MS3PROEVO-A-1 High current out 1
MS3PROEVO-C-1 PWM out 5
MS3PROEVO-A-2 High current out 2
MS3PROEVO-A-5 High current out 3
MS3PROEVO-A-14 PWM / Idle Out 1
MS3PROEVO-C-4 Digital out 1
MS3PROEVO-B-2 Injector out B
MS3PROEVO-B-13 Spark out G
MS3PROEVO-B-14 Spark out E
GND
GND
ECU power (IGP1)
0V sensor
OEM-A
Stock ECU being replaced
1Injector 1
2Injector 4
3Injector 2
4Injector 5
5Injector 3
6Injector 6
7Main relay
8Fuel pump relay 2 (FLR2)
9Idle air control valve (IACV)
10Front O2 sensor heater (HTCNTF)
11EGR control solenoid
12Rear O2 sensor heater (HTCNTR)
13Check engine light (WARN)
14Chamber volume control solenoid (BPS)
15A/C clutch relay (ACC)
18Radiator fan control (FANCNTR)
20EVAP purge cut-off solenoid (PGS)
21Ignition coil 1
22Ignition coil 2
23Power ground (PG1)
24Power ground (PG2)
25ECU power (IGP1)
26Sensor ground (LG1)
GND
MS3PROEVO-B-25 Spark out B
MS3PROEVO-B-24 Spark out F
MS3PROEVO-B-16 Spark out H
MS3PROEVO-B-29 Digital switched in 3
MS3PROEVO-B-15 Spark out C
MS3PROEVO-B-28 Digital frequency in 1 (unconditioned)
0V sensor
MS3PROEVO-A-26 CMP+
0V sensor
MS3PROEVO-B-34 Digital Frequency in 1 (VR+)
0V sensor
MS3PROEVO-A-6 CKP+
0V sensor
OEM-B
Stock ECU being replaced
2Chassis ground (LG2)
3Ignition coil 6
4Ignition coil 5
6Ignition coil 4
7Neutral switch (M/T) / gear position (A/T)
8Ignition coil 3
9CYL 2P — CYP sensor 2 signal
10CYL 2M — CYP sensor 2 return
11CYL 1P — CYP sensor 1 signal
12CYL 1M — CYP sensor 1 return
13CRNK 2P — TDC sensor signal
14CRNK 2M — TDC sensor return
15CRNK 1P — crank sensor signal
16CRNK 1M — crank sensor return
ECU power (IGP2)
MS3PROEVO-B-17 Digital frequency in 2 (Hall)
MS3PROEVO-C-10 Digital switched in 5
MS3PROEVO-A-24 Tach out
MS3PROEVO-B-22 Digital Frequency in 3 (VR+)
MS3PROEVO-B-23 Digital Frequency In 3 (VR−)
MS3PROEVO-A-22 Analog In 4
MS3PROEVO-C-11 Digital switched in 4
OEM-C
Stock ECU being replaced
1ECU power (IGP2)
2Vehicle speed sensor (VSS)
3A/C switch (ACS)
4Tachometer output (NEP)
5A/C pressure switch (PDSW)
7Clutch switch (M/T)
9Service check connector (SCS)
11Starter switch (STS)
MS3PROEVO-A-7 Knock In 2
MS3PROEVO-A-31 Knock in 1
MS3PROEVO-A-23 Analog In 5
MS3PROEVO-B-21 Digital frequency in 3 (unconditioned)
MS3PROEVO-A-9 TPS in
MS3PROEVO-A-21 Analog in 3
MS3PROEVO-A-11 CLT in
MS3PROEVO-A-25 O2 in
MS3PROEVO-A-10 MAT in
MS3PROEVO-A-20 Analog in 2
MS3PROEVO-A-19 Analog in 1
5V ref
5V ref
5V ref
0V sensor
0V sensor
OEM-D
Stock ECU being replaced
3Knock sensor — rear
4Knock sensor — front
8Ignition timing adjuster (IGADJ)
9Alternator FR signal
11Throttle position sensor (TPS)
12EGR lift sensor (EGRL)
13Engine coolant temperature (ECT)
14Primary O2 sensor
15Intake air temperature (IAT)
16Secondary O2 sensor
17MAP sensor
18+5V sensor supply (VCC)
19+5V sensor supply (VCC)
20+5V sensor supply (VCC)
21Sensor ground (SG)
22Sensor ground (SG)
MS3PROEVO
MS3PROEVO-A
MS3PROEVO
1High current out 1
2High current out 2
3Injector out J
4Injector out I
5High current out 3
6CKP+
7Knock In 2
85V+ VREF out
9TPS in
10MAT in
11CLT in
13Logic Ground
14PWM / Idle Out 1
15CKP−
18Sensor return
19Analog in 1
20Analog in 2
21Analog in 3
22Analog In 4
23Analog In 5
24Tach out
25O2 in
26CMP+
27CMP−
28Fuel pump relay out
29PWM out 2
30PWM out 3
31Knock in 1
32Digital switched in 1
3512V+ switched power in
OEM-A-11 EGR control solenoid
OEM-A-13 Check engine light (WARN)
OEM-A-1 Injector 1
OEM-A-3 Injector 2
OEM-A-14 Chamber volume control solenoid (BPS)
OEM-B-15 CRNK 1P — crank sensor signal
OEM-D-3 Knock sensor — rear
5V ref
OEM-D-11 Throttle position sensor (TPS)
OEM-D-15 Intake air temperature (IAT)
OEM-D-13 Engine coolant temperature (ECT)
0V sensor
OEM-A-15 A/C clutch relay (ACC)
SP-0V · 7 pins
0V sensor
OEM-D-17 MAP sensor
OEM-D-16 Secondary O2 sensor
OEM-D-12 EGR lift sensor (EGRL)
OEM-C-9 Service check connector (SCS)
OEM-D-8 Ignition timing adjuster (IGADJ)
OEM-C-4 Tachometer output (NEP)
OEM-D-14 Primary O2 sensor
OEM-B-11 CYL 1P — CYP sensor 1 signal
SP-0V · 7 pins
OEM-A-8 Fuel pump relay 2 (FLR2)
OEM-A-7 Main relay
RLY2-R-COIL- Relay coil negative (ECU low-side driver)
OEM-D-4 Knock sensor — front
OEM-5-F2 Front VTEC pressure switch
12V+ switched power in
MS3PROEVO-B
MS3PROEVO
1Injector out A
2Injector out B
3Ground
4Injector out C
5Ground
7Ground
9Ground
10Injector out F
11Injector out G
12Injector out H
13Spark out G
14Spark out E
15Spark out C
16Spark out H
17Digital frequency in 2 (Hall)
20Digital switched in 2
21Digital frequency in 3 (unconditioned)
22Digital Frequency in 3 (VR+)
23Digital Frequency In 3 (VR−)
24Spark out F
25Spark out B
28Digital frequency in 1 (unconditioned)
29Digital switched in 3
34Digital Frequency in 1 (VR+)
35Digital Frequency in 1 (VR−)
OEM-A-5 Injector 3
OEM-A-20 EVAP purge cut-off solenoid (PGS)
GND
OEM-A-9 Idle air control valve (IACV)
GND
GND
GND
OEM-A-2 Injector 4
OEM-A-4 Injector 5
OEM-A-6 Injector 6
OEM-A-21 Ignition coil 1
OEM-A-22 Ignition coil 2
OEM-B-8 Ignition coil 3
OEM-B-6 Ignition coil 4
OEM-C-2 Vehicle speed sensor (VSS)
OEM-5-F4 Rear VTEC pressure switch
OEM-D-9 Alternator FR signal
OEM-C-5 A/C pressure switch (PDSW)
OEM-C-7 Clutch switch (M/T)
OEM-B-4 Ignition coil 5
OEM-B-3 Ignition coil 6
OEM-B-9 CYL 2P — CYP sensor 2 signal
OEM-B-7 Neutral switch (M/T) / gear position (A/T)
OEM-B-13 CRNK 2P — TDC sensor signal
SP-0V · 7 pins
MS3PROEVO-C
MS3PROEVO
1PWM out 5
2PWM out 4
3Digital out 2
4Digital out 1
10Digital switched in 5
11Digital switched in 4
17Sensor return
18Sensor return
19Sensor return
20Sensor return
21Sensor return
OEM-A-12 Rear O2 sensor heater (HTCNTR)
OEM-A-10 Front O2 sensor heater (HTCNTF)
RLY1-R-COIL- Relay coil negative (ECU low-side driver)
OEM-A-18 Radiator fan control (FANCNTR)
OEM-C-3 A/C switch (ACS)
OEM-C-11 Starter switch (STS)
0V sensor
0V sensor
0V sensor
0V sensor
0V sensor
RLY1
RLY1-R
RLY1
INRelay contact input (switched +12 V)
OUTRelay contact output (switched +12 V to load)
COIL+Relay coil positive (switched +12 V)
COIL-Relay coil negative (ECU low-side driver)
SP-14V · 5 pins
OEM-5-F5 Front VTEC solenoid valve
Relay coil positive (switched +12 V)
MS3PROEVO-C-3 Digital out 2
RLY2
RLY2-R
RLY2
INRelay contact input (switched +12 V)
OUTRelay contact output (switched +12 V to load)
COIL+Relay coil positive (switched +12 V)
COIL-Relay coil negative (ECU low-side driver)
SP-14V · 5 pins
OEM-5-F7 Rear VTEC solenoid valve
Relay coil positive (switched +12 V)
MS3PROEVO-A-30 PWM out 3
SP-GND · 8 pins
SP-0V · 18 pins
SP-5V1 · 5 pins
SP-14V · 8 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.