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
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
F5Front VTEC solenoid valve
F7Rear VTEC solenoid valve
SPEEDUINO-A-1 Injector 1
SPEEDUINO-A-5 Injector 4
SPEEDUINO-A-2 Injector 2
SPEEDUINO-A-1 Injector 1
SPEEDUINO-A-3 Injector 3
SPEEDUINO-A-2 Injector 2
SPEEDUINO-A-35 Boost
SPEEDUINO-A-16 Proto area 3 (fuel pump)
SPEEDUINO-A-15 Proto area 2 (fan)
SPEEDUINO-A-36 Idle 2 (3-wire idle)
SPEEDUINO-A-7 Ignition 1
SPEEDUINO-A-34 Ignition 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)
15A/C clutch relay (ACC)
18Radiator fan control (FANCNTR)
21Ignition coil 1
22Ignition coil 2
23Power ground (PG1)
24Power ground (PG2)
25ECU power (IGP1)
26Sensor ground (LG1)
GND
SPEEDUINO-A-8 Ignition 4
SPEEDUINO-A-33 Ignition 3
SPEEDUINO-A-26 VR2-
0V sensor
SPEEDUINO-A-24 Cam input / VR2+
0V sensor
SPEEDUINO-A-27 VR1-
0V sensor
SPEEDUINO-A-25 Crank input / VR1+
0V sensor
OEM-B
Stock ECU being replaced
2Chassis ground (LG2)
6Ignition coil 4
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)
SPEEDUINO-A-14 Proto area 1 (flex fuel)
SPEEDUINO-A-17 Proto area 4 (tachometer)
OEM-C
Stock ECU being replaced
1ECU power (IGP2)
2Vehicle speed sensor (VSS)
4Tachometer output (NEP)
SPEEDUINO-A-18 Proto area 5 (clutch)
SPEEDUINO-A-22 TPS input
SPEEDUINO-A-19 Coolant temp (CLT)
SPEEDUINO-A-21 O2 sensor
SPEEDUINO-A-20 Inlet air temp (IAT)
SPEEDUINO-A-11 MAP sensor (0-5V)
5V ref
5V ref
5V ref
0V sensor
0V sensor
OEM-D
Stock ECU being replaced
9Alternator FR signal
11Throttle position sensor (TPS)
13Engine coolant temperature (ECT)
14Primary O2 sensor
15Intake air temperature (IAT)
17MAP sensor
18+5V sensor supply (VCC)
19+5V sensor supply (VCC)
20+5V sensor supply (VCC)
21Sensor ground (SG)
22Sensor ground (SG)
MAIN
MAIN-R
MAIN
INRelay contact input (battery + via main fuse)
OUTRelay contact output (switched +12V bus)
COIL+Relay coil positive (ignition-switched +12V)
COIL-Relay coil negative (ECU low-side driver)
NEW-BATT
SPEEDUINO-PWR-12V Main power (+12 V switched)
Relay coil positive (ignition-switched +12V)
SP-GND · 5 pins
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 · 4 pins
OEM-5-F5 Front VTEC solenoid valve
Relay coil positive (switched +12 V)
SPEEDUINO-A-37 PWM idle
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 · 4 pins
OEM-5-F7 Rear VTEC solenoid valve
Relay coil positive (switched +12 V)
SPEEDUINO-A-38 VVT
SPEEDUINO
SPEEDUINO-A
SPEEDUINO
1Injector 1
2Injector 2
3Injector 3
5Injector 4
7Ignition 1
8Ignition 4
9Ground
10Ground
11MAP sensor (0-5V)
12Ground
135V
14Proto area 1 (flex fuel)
15Proto area 2 (fan)
16Proto area 3 (fuel pump)
17Proto area 4 (tachometer)
18Proto area 5 (clutch)
19Coolant temp (CLT)
20Inlet air temp (IAT)
21O2 sensor
22TPS input
23Ground
24Cam input / VR2+
25Crank input / VR1+
26VR2-
27VR1-
33Ignition 3
34Ignition 2
35Boost
36Idle 2 (3-wire idle)
37PWM idle
38VVT
Injector 1 · 2 pins
Injector 2 · 2 pins
OEM-A-5 Injector 3
OEM-A-2 Injector 4
OEM-A-21 Ignition coil 1
OEM-B-6 Ignition coil 4
GND
GND
OEM-D-17 MAP sensor
0V sensor
5V ref
OEM-C-2 Vehicle speed sensor (VSS)
OEM-A-15 A/C clutch relay (ACC)
OEM-A-8 Fuel pump relay 2 (FLR2)
OEM-C-4 Tachometer output (NEP)
OEM-D-9 Alternator FR signal
OEM-D-13 Engine coolant temperature (ECT)
OEM-D-15 Intake air temperature (IAT)
OEM-D-14 Primary O2 sensor
OEM-D-11 Throttle position sensor (TPS)
0V sensor
OEM-B-11 CYL 1P — CYP sensor 1 signal
OEM-B-15 CRNK 1P — crank sensor signal
OEM-B-9 CYL 2P — CYP sensor 2 signal
OEM-B-13 CRNK 2P — TDC sensor signal
OEM-B-8 Ignition coil 3
OEM-A-22 Ignition coil 2
OEM-A-7 Main relay
OEM-A-18 Radiator fan control (FANCNTR)
RLY1-R-COIL- Relay coil negative (ECU low-side driver)
RLY2-R-COIL- Relay coil negative (ECU low-side driver)
SPEEDUINO-PWR
SPEEDUINO
12VMain power (+12 V switched)
Main power (+12 V switched)
◯New feed: NEW-BATT
◯New feed: NEW-KEYON
SP-14V · 7 pins
SP-GND · 7 pins
SP-0V · 10 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.
58 / 58 connections
Columns ▾
Lengths need a layout. Add bundles in Layout.
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