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
GND
G4XMONSOONX-A-A19 Aux 3
ECM power (J271 relay feed)
0V sensor
G4XMONSOONX-A-A33 Analog Volt 3
0V sensor
0V sensor
G4XMONSOONX-A-A17 Analog Volt 1
G4XMONSOONX-A-A30 Digital Input 1
G4XMONSOONX-A-A29 CAN L
G4XMONSOONX-A-A28 CAN H
G4XMONSOONX-A-A18 Aux 4
G4XMONSOONX-A-A21 Aux 1
G4XMONSOONX-A-A20 Aux 2
5V ref
5V ref
G4XMONSOONX-A-A8 Trigger 1
5V ref
G4XMONSOONX-A-A14 Analog Volt 4
G4XMONSOONX-A-A16 Analog Temp 2
G4XMONSOONX-A-A9 Trigger 2
G4XMONSOONX-A-A1 Injector 4
G4XMONSOONX-A-A3 Injector 2
0V sensor
0V sensor
G4XMONSOONX-A-A15 Analog Temp 1
G4XMONSOONX-A-A10 Ignition 4
G4XMONSOONX-A-A12 Ignition 2
G4XMONSOONX-A-A4 Injector 1
G4XMONSOONX-A-A2 Injector 3
5V ref
5V ref
G4XMONSOONX-A-A22 Analog Volt 2
G4XMONSOONX-A-A13 Ignition 1
G4XMONSOONX-A-A11 Ignition 3
G4XMONSOONX-A-A27 Aux 5
G4XMONSOONX-A-A26 Aux 6
G4XMONSOONX-A-A6 Knock 1 / Digital Input 4
0V sensor
ECM + coil power (J271 relay feed)
OEM-T121
Stock ECU being replaced
1ECU ground
2ECU ground
5Wideband lambda heater (Z19)
21ECM power (J271 relay feed)
29MAF sensor ground (G70)
33Accelerator pedal position 1 (G79)
34Accelerator pedal position 1 ground (G79)
36Accelerator pedal position 2 ground (G185)
53MAF sensor signal (G70)
54Road speed signal (VSS)
58CAN bus low
60CAN bus high
63Post-cat lambda heater (Z29)
65Fuel pump relay control
66Secondary-air pump relay (J299)
72Accelerator pedal position 1 5V supply (G79)
73Accelerator pedal position 2 5V supply (G185)
82Crank position sensor (G28)
83Throttle position sensor 5V supply (G187/G188)
84Throttle position sensor 1 (G187)
85Intake air temperature (G42)
86Camshaft position sensor (G40)
88Injector 4 (N33)
89Injector 2 (N31)
90Crank position sensor ground (G28)
91Throttle position sensor ground (G187/G188)
93Engine coolant temperature (G62)
94Ignition coil 4 (N163)
95Ignition coil 2 (N128)
96Injector 1 (N30)
97Injector 3 (N32)
98Cam + boost sensor 5V supply (G40/G31)
99Knock sensor 5V supply (G61/G66)
101Boost pressure sensor (G31)
102Ignition coil 1 (N127)
103Ignition coil 3 (N158)
104Boost control solenoid (N75)
105Diverter valve (N249)
106Knock sensor 1 (G61)
108Sensor ground
121ECM + coil power (J271 relay feed)
G4XMONSOONX
G4XMONSOONX-A
G4XMONSOONX
A1Injector 4
A2Injector 3
A3Injector 2
A4Injector 1
A5+14V ECU Power
A6Knock 1 / Digital Input 4
A8Trigger 1
A9Trigger 2
A10Ignition 4
A11Ignition 3
A12Ignition 2
A13Ignition 1
A14Analog Volt 4
A15Analog Temp 1
A16Analog Temp 2
A17Analog Volt 1
A18Aux 4
A19Aux 3
A20Aux 2
A21Aux 1
A22Analog Volt 2
A24Sensor Ground
A25System Ground
A26Aux 6
A27Aux 5
A28CAN H
A29CAN L
A30Digital Input 1
A32+5V Out
A33Analog Volt 3
A34System Ground
OEM-T121-88 Injector 4 (N33)
OEM-T121-97 Injector 3 (N32)
OEM-T121-89 Injector 2 (N31)
OEM-T121-96 Injector 1 (N30)
+14V ECU Power
OEM-T121-106 Knock sensor 1 (G61)
OEM-T121-82 Crank position sensor (G28)
OEM-T121-86 Camshaft position sensor (G40)
OEM-T121-94 Ignition coil 4 (N163)
OEM-T121-103 Ignition coil 3 (N158)
OEM-T121-95 Ignition coil 2 (N128)
OEM-T121-102 Ignition coil 1 (N127)
OEM-T121-84 Throttle position sensor 1 (G187)
OEM-T121-93 Engine coolant temperature (G62)
OEM-T121-85 Intake air temperature (G42)
OEM-T121-53 MAF sensor signal (G70)
OEM-T121-63 Post-cat lambda heater (Z29)
OEM-T121-5 Wideband lambda heater (Z19)
OEM-T121-66 Secondary-air pump relay (J299)
OEM-T121-65 Fuel pump relay control
OEM-T121-101 Boost pressure sensor (G31)
0V sensor
GND
OEM-T121-105 Diverter valve (N249)
OEM-T121-104 Boost control solenoid (N75)
OEM-T121-60 CAN bus high
OEM-T121-58 CAN bus low
OEM-T121-54 Road speed signal (VSS)
5V ref
OEM-T121-33 Accelerator pedal position 1 (G79)
GND
SP-GND · 5 pins
SP-14V · 4 pins
SP-0V · 8 pins
SP-5V1 · 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.
46 / 46 connections
Columns ▾
Lengths need a layout. Add bundles in Layout.
Not set yet: signal, colour, stripe, ident.
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