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
ME442-C1-8 DIG_IN 3
ME442-C1-5 DIG_IN 4
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
ME442-C1-63 INJECTOR 1
ME442-C1-3 INJECTOR 4
ME442-C1-4 INJECTOR 2
ME442-C1-28 INJECTOR 5
ME442-C1-33 INJECTOR 3
ME442-C1-58 INJECTOR 6
ME442-C1-43 LOW SIDE RELAY 14
ME442-C1-37 LOW SIDE RELAY 11
ME442-C1-75 LOW SIDE RELAY 16
ME442-C1-16 LSU HEATER -VE
ME442-C1-44 LOW SIDE 4
ME442-C1-74 LOW SIDE 3
ME442-C1-69 LOW SIDE 5
ME442-C1-39 LOW SIDE 6
ME442-C1-42 LOW SIDE RELAY 12
ME442-C1-72 LOW SIDE RELAY 13
ME442-C1-13 LOW SIDE RELAY 15
ME442-C1-32 COIL 1
ME442-C1-31 COIL 2
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
ME442-C1-60 COIL 6
ME442-C1-59 COIL 5
ME442-C1-1 COIL 4
ME442-C1-62 DIG_IN 5
ME442-C1-2 COIL 3
ME442-C1-23 CAM A VR-
0V sensor
ME442-C1-22 CAM A VR+
0V sensor
ME442-C1-81 CRANK VR-
0V sensor
ME442-C1-80 CRANK VR+
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)
ME442-C1-6 DIG_IN 1
ME442-C1-78 ANA VOLT 6
ME442-C1-79 TACHOMETER
ME442-C1-48 ANA VOLT 7
ME442-C1-34 DIG_IN 6
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)
11Starter switch (STS)
ME442-C1-54 KNOCK 2 SIGNAL
ME442-C1-53 KNOCK 1 SIGNAL
ME442-C1-7 DIG_IN 2
ME442-C1-56 ANA VOLT 2
ME442-C1-87 ANA VOLT 5
ME442-C1-86 ANA TEMP 1
ME442-C1-17 ANA VOLT 3
ME442-C1-57 ANA TEMP 2
ME442-C1-18 ANA VOLT 4
ME442-C1-26 ANA VOLT 1
5V ref
5V ref
5V ref
0V sensor
0V sensor
OEM-D
Stock ECU being replaced
3Knock sensor — rear
4Knock sensor — front
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)
ME442
ME442-C1
ME442
1COIL 4
2COIL 3
3INJECTOR 4
4INJECTOR 2
5DIG_IN 4
6DIG_IN 1
7DIG_IN 2
8DIG_IN 3
10GROUND CHASSIS
12LOW SIDE 2
13LOW SIDE RELAY 15
15IGN +12V
16LSU HEATER -VE
17ANA VOLT 3
18ANA VOLT 4
22CAM A VR+
23CAM A VR-
26ANA VOLT 1
28INJECTOR 5
31COIL 2
32COIL 1
33INJECTOR 3
34DIG_IN 6
37LOW SIDE RELAY 11
39LOW SIDE 6
42LOW SIDE RELAY 12
43LOW SIDE RELAY 14
44LOW SIDE 4
455V REF
48ANA VOLT 7
52SENSORS GROUND
53KNOCK 1 SIGNAL
54KNOCK 2 SIGNAL
56ANA VOLT 2
57ANA TEMP 2
58INJECTOR 6
59COIL 5
60COIL 6
61GROUND
62DIG_IN 5
63INJECTOR 1
64VBAT
69LOW SIDE 5
72LOW SIDE RELAY 13
73LOW SIDE 1
74LOW SIDE 3
75LOW SIDE RELAY 16
78ANA VOLT 6
79TACHOMETER
80CRANK VR+
81CRANK VR-
84Sensor Ground
86ANA TEMP 1
87ANA VOLT 5
89GROUND
90GROUND
OEM-B-6 Ignition coil 4
OEM-B-8 Ignition coil 3
OEM-A-2 Injector 4
OEM-A-3 Injector 2
OEM-5-F4 Rear VTEC pressure switch
OEM-C-2 Vehicle speed sensor (VSS)
OEM-D-9 Alternator FR signal
OEM-5-F2 Front VTEC pressure switch
GND
RLY2-R-COIL- Relay coil negative (ECU low-side driver)
OEM-A-20 EVAP purge cut-off solenoid (PGS)
IGN +12V
OEM-A-10 Front O2 sensor heater (HTCNTF)
OEM-D-14 Primary O2 sensor
OEM-D-16 Secondary O2 sensor
OEM-B-11 CYL 1P — CYP sensor 1 signal
OEM-B-9 CYL 2P — CYP sensor 2 signal
OEM-D-17 MAP sensor
OEM-A-4 Injector 5
OEM-A-22 Ignition coil 2
OEM-A-21 Ignition coil 1
OEM-A-5 Injector 3
OEM-C-11 Starter switch (STS)
OEM-A-8 Fuel pump relay 2 (FLR2)
OEM-A-14 Chamber volume control solenoid (BPS)
OEM-A-15 A/C clutch relay (ACC)
OEM-A-7 Main relay
OEM-A-11 EGR control solenoid
5V ref
OEM-C-5 A/C pressure switch (PDSW)
0V sensor
OEM-D-4 Knock sensor — front
OEM-D-3 Knock sensor — rear
OEM-D-11 Throttle position sensor (TPS)
OEM-D-15 Intake air temperature (IAT)
OEM-A-6 Injector 6
OEM-B-4 Ignition coil 5
OEM-B-3 Ignition coil 6
GND
OEM-B-7 Neutral switch (M/T) / gear position (A/T)
OEM-A-1 Injector 1
VBAT
OEM-A-13 Check engine light (WARN)
OEM-A-18 Radiator fan control (FANCNTR)
RLY1-R-COIL- Relay coil negative (ECU low-side driver)
OEM-A-12 Rear O2 sensor heater (HTCNTR)
OEM-A-9 Idle air control valve (IACV)
OEM-C-3 A/C switch (ACS)
OEM-C-4 Tachometer output (NEP)
OEM-B-15 CRNK 1P — crank sensor signal
OEM-B-13 CRNK 2P — TDC sensor signal
0V sensor
OEM-D-13 Engine coolant temperature (ECT)
OEM-D-12 EGR lift sensor (EGRL)
GND
GND
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 · 6 pins
OEM-5-F5 Front VTEC solenoid valve
Relay coil positive (switched +12 V)
ME442-C1-73 LOW SIDE 1
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 · 6 pins
OEM-5-F7 Rear VTEC solenoid valve
Relay coil positive (switched +12 V)
ME442-C1-12 LOW SIDE 2
SP-GND · 8 pins
SP-0V · 10 pins
SP-14V · 9 pins
SP-5V1 · 5 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.