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
GND
SL4-A-2 Injection channel 2
SL4-A-2 Injection channel 2
SL4-A-4 Injection channel 4
SL4-A-10 Auxiliary output 1
SL4-A-14 Auxiliary output 5
GND
SL4-A-26 Ignition channel 1
SL4-A-15 Auxiliary output 6
GND
SL4-B-13 Analog input 3
SL4-B-15 Analog input 5
0V sensor
SL4-B-11 Analog input 1
SL4-B-14 Analog input 4
SL4-A-12 Auxiliary output 3
ECU main power (from engine-electronics relay)
SL4-A-1 Injection channel 1
SL4-A-1 Injection channel 1
SL4-A-3 Injection channel 3
SL4-A-16 Auxiliary output 7
SL4-A-17 Auxiliary output 8
0V sensor
SL4-B-16 Knock 1 +
SL4-B-19 Analog input 6
SL4-A-21 Digital input 2
SL4-B-4 Ignition switch input
SL4-A-22 Digital input 3
SL4-B-12 Analog input 2
5V ref
SL4-B-7 Sync sensor +
SL4-B-3 EFI relay output (low side, 200 mA)
SL4-A-13 Auxiliary output 4
SL4-A-28 Ignition channel 3
SL4-A-11 Auxiliary output 2
GND
GND
SL4-A-27 Ignition channel 2
SL4-A-20 Digital input 1
0V sensor
SL4-B-5 Crank index sensor +
OEM-A
Stock ECU being replaced
1Ground (E-1)
2Injector 6 (cyl 6)
3Injector 2 (cyl 2)
4Injector 4 (cyl 4)
5Check engine light (MIL)
6Fuel pump relay control
7Ground (E-2)
8Ignition coil 2 (coil pack pin 2)
9Engine electronics relay control
10Ground (OBD1 EGR enable)
14Coolant temperature (CLT)
15EGR temperature sensor
16MAF ground
17MAF signal
20O2 sensor 1 (primary)
22Tachometer output
23ECU main power (from engine-electronics relay)
24Injector 1 (cyl 1)
25Injector 5 (cyl 5)
26Injector 3 (cyl 3)
27Idle air control valve
31EVAP canister purge valve
33Sensor ground bus
34Knock sensor 1
36Intake air temperature (IAT)
37A/C compressor switch
38Ignition switch (run/start)
39A/C switch (cabin)
40Throttle position sensor 1
41TPS power (+5V)
44Camshaft position sensor (G40)
49Secondary air injection relay control
51MFA fuel-consumption signal
52Ignition coil 4 (coil pack pin 4)
53Idle air control valve (2nd)
55Ground (E-3)
56Ground (E-4)
60Ignition coil 3 (coil pack pin 3)
65Vehicle speed sensor (VSS)
67Crank sensor return (VR-)
68Crank position sensor (G28, VR+)
SL4
SL4-A
SL4
1Injection channel 1
2Injection channel 2
3Injection channel 3
4Injection channel 4
5–8 no data
10Auxiliary output 1
11Auxiliary output 2
12Auxiliary output 3
13Auxiliary output 4
14Auxiliary output 5
15Auxiliary output 6
16Auxiliary output 7
17Auxiliary output 8
20Digital input 1
21Digital input 2
22Digital input 3
26Ignition channel 1
27Ignition channel 2
28Ignition channel 3
30–33 no data
34Aux 9–10 14V supply
Injection channel 1 · 2 pins
Injection channel 2 · 2 pins
OEM-A-26 Injector 3 (cyl 3)
OEM-A-4 Injector 4 (cyl 4)
5–8 no data
OEM-A-5 Check engine light (MIL)
OEM-A-53 Idle air control valve (2nd)
OEM-A-22 Tachometer output
OEM-A-51 MFA fuel-consumption signal
OEM-A-6 Fuel pump relay control
OEM-A-9 Engine electronics relay control
OEM-A-27 Idle air control valve
OEM-A-31 EVAP canister purge valve
OEM-A-65 Vehicle speed sensor (VSS)
OEM-A-37 A/C compressor switch
OEM-A-39 A/C switch (cabin)
OEM-A-8 Ignition coil 2 (coil pack pin 2)
OEM-A-60 Ignition coil 3 (coil pack pin 3)
OEM-A-52 Ignition coil 4 (coil pack pin 4)
30–33 no data
Aux 9–10 14V supply
SL4-B
SL4
1ECU 14V supply
2Sensor supply Vref1 5.0V
3EFI relay output (low side, 200 mA)
4Ignition switch input
5Crank index sensor +
6Crank index sensor −
7Sync sensor +
8Sync sensor −
10Analog sensor 0V reference
11Analog input 1
12Analog input 2
13Analog input 3
14Analog input 4
15Analog input 5
16Knock 1 +
18ECU ground
19Analog input 6
26ECU ground
29–30 no data
ECU 14V supply
5V ref
OEM-A-49 Secondary air injection relay control
OEM-A-38 Ignition switch (run/start)
OEM-A-68 Crank position sensor (G28, VR+)
SP-0V · 3 pins
OEM-A-44 Camshaft position sensor (G40)
SP-0V · 3 pins
0V sensor
OEM-A-17 MAF signal
OEM-A-40 Throttle position sensor 1
OEM-A-14 Coolant temperature (CLT)
OEM-A-20 O2 sensor 1 (primary)
OEM-A-15 EGR temperature sensor
OEM-A-34 Knock sensor 1
GND
OEM-A-36 Intake air temperature (IAT)
GND
29–30 no data
SP-14V · 4 pins
SP-GND · 8 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.
48 / 48 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 | |
|---|---|---|---|---|---|---|---|---|---|
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — | |||||||||
| — |