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
Ignition power 2
Ignition power 1
GND
GND
SPEEDUINO-A-24 Cam input / VR2+
SPEEDUINO-A-25 Crank input / VR1+
GND
GND
11–12 no data
SPEEDUINO-A-8 Ignition 4
SPEEDUINO-A-33 Ignition 3
SPEEDUINO-A-34 Ignition 2
SPEEDUINO-A-7 Ignition 1
17 no data
SPEEDUINO-A-14 Proto area 1 (flex fuel)
19 no data
5V ref
5V ref
22 no data
0V sensor
0V sensor
SPEEDUINO-A-22 TPS input
27 no data
29 no data
SPEEDUINO-A-11 MAP sensor (0-5V)
OEM-A
Stock ECU being replaced
2Ignition power 2
3Ignition power 1
4Power ground 2
5Power ground 1
6Cam position sensor (T2)
7Crank position sensor (T1)
8Logic ground 2
9Logic ground 1
11–12 no data
13Ignition coil 4
14Ignition coil 3
15Ignition coil 2
16Ignition coil 1
17 no data
18Vehicle speed sensor
19 no data
20Sensor voltage 2
21Sensor voltage 1
22 no data
23Sensor ground 2
24Sensor ground 1
25Accelerator pedal position B
27 no data
29 no data
30MAP sensor
SPEEDUINO-A-5 Injector 4
SPEEDUINO-A-3 Injector 3
SPEEDUINO-A-2 Injector 2
SPEEDUINO-A-1 Injector 1
RLY1-R-OUT Relay contact output (switched +12 V to load)
SPEEDUINO-A-19 Coolant temp (CLT)
SPEEDUINO-A-18 Proto area 5 (clutch)
15 no data
OEM-B
Stock ECU being replaced
2Injector 4
3Injector 3
4Injector 2
5Injector 1
6VTEC solenoid
8Coolant temp sensor
11VTEC oil pressure switch
15 no data
2–3 no data
5–6 no data
10–14 no data
SPEEDUINO-A-35 Boost
16–17 no data
OEM-D
Stock ECU being replaced
2–3 no data
5–6 no data
10–14 no data
15Throttle actuator relay
16–17 no data
SPEEDUINO-A-20 Inlet air temp (IAT)
2 no data
GND
0V sensor
5V ref
6 no data
SPEEDUINO-A-15 Proto area 2 (fan)
MAIN-R-COIL+ Relay coil positive (ignition-switched +12V)
10 no data
SPEEDUINO-A-37 PWM idle
SPEEDUINO-A-16 Proto area 3 (fuel pump)
SPEEDUINO-A-38 VVT
SPEEDUINO-A-21 O2 sensor
SPEEDUINO-A-17 Proto area 4 (tachometer)
26 no data
31 no data
OEM-E
Stock ECU being replaced
1Coolant temp sensor 2
2 no data
3Logic ground 3
4Sensor ground 3
5Sensor voltage 3
6 no data
7Main relay control
9Ignition signal
10 no data
12Radiator fan control
17Fuel pump relay
18A/C clutch relay
20Secondary O2 sensor
25Engine speed pulse (tacho)
26 no data
31 no data
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 · 7 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 · 2 pins
OEM-B-6 VTEC solenoid
Relay coil positive (switched +12 V)
SPEEDUINO-A-36 Idle 2 (3-wire idle)
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+
285V
31Idle stepper 1A
32Idle stepper 1B
33Ignition 3
34Ignition 2
35Boost
36Idle 2 (3-wire idle)
37PWM idle
38VVT
OEM-B-5 Injector 1
OEM-B-4 Injector 2
OEM-B-3 Injector 3
OEM-B-2 Injector 4
OEM-A-16 Ignition coil 1
OEM-A-13 Ignition coil 4
GND
GND
OEM-A-30 MAP sensor
0V sensor
5V ref
OEM-A-18 Vehicle speed sensor
OEM-E-7 Main relay control
OEM-E-17 Fuel pump relay
OEM-E-25 Engine speed pulse (tacho)
OEM-B-11 VTEC oil pressure switch
OEM-B-8 Coolant temp sensor
OEM-E-1 Coolant temp sensor 2
OEM-E-20 Secondary O2 sensor
OEM-A-25 Accelerator pedal position B
0V sensor
OEM-A-6 Cam position sensor (T2)
OEM-A-7 Crank position sensor (T1)
5V ref
TB-J-M+ Throttle motor +
TB-J-M- Throttle motor −
OEM-A-14 Ignition coil 3
OEM-A-15 Ignition coil 2
OEM-D-15 Throttle actuator relay
RLY1-R-COIL- Relay coil negative (ECU low-side driver)
OEM-E-12 Radiator fan control
OEM-E-18 A/C clutch relay
SPEEDUINO-PWR
SPEEDUINO
12VMain power (+12 V switched)
Main power (+12 V switched)
TB
TB-J
TB
M+Throttle motor +
M-Throttle motor −
GNDThrottle sensor ground
VCCThrottle sensor 5V supply
SPEEDUINO-A-31 Idle stepper 1A
SPEEDUINO-A-32 Idle stepper 1B
0V sensor
Throttle sensor 5V supply
◯New feed: NEW-BATT
SP-14V · 5 pins
SP-GND · 9 pins
SP-5V1 · 5 pins
SP-0V · 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.
53 / 53 connections
Columns ▾
Lengths need a layout. Add bundles in Layout.
Not set yet: signal, colour, stripe, ident.
| Wire | From | To | Signal | Gauge | Colour | Stripe | Ident | Flags | |
|---|---|---|---|---|---|---|---|---|---|
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — |