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
MAXXECUGEN2T-MX2-24 12V supply 3
MAXXECUGEN2T-MX2-12 GP OUT 7 / WBO2 Sensor 1 H-
ECM power (J271 relay feed)
MAXXECUGEN2T-MX2-34 INJECTOR 6
MAXXECUGEN2T-MX1-7 GP out 3 (GND)
MAXXECUGEN2T-MX1-24 Digital/VR 4 SIGNAL +
0V sensor
MAXXECUGEN2T-MX1-28 AIN 3
0V sensor
MAXXECUGEN2T-MX1-30 AIN 5
0V sensor
MAXXECUGEN2T-MX3-21 Digital/VR 5 SIGNAL +
MAXXECUGEN2T-MX3-26 Digital/VR 6 SIGNAL +
MAXXECUGEN2T-MX2-15 AIN 11
MAXXECUGEN2T-MX2-16 AIN 12
MAXXECUGEN2T-MX3-29 INJECTOR 7
MAXXECUGEN2T-MX3-30 INJECTOR 8
MAXXECUGEN2T-MX2-17 AIN 13
MAXXECUGEN2T-MX2-19 WBO2 sensor 1 IP
MAXXECUGEN2T-MX3-19 WBO2 sensor 2 IP
MAXXECUGEN2T-MX1-26 AIN 1
MAXXECUGEN2T-MX1-23 Digital/VR 3 SIGNAL +
MAXXECUGEN2T-MX2-22 AIN 14
MAXXECUGEN2T-MX2-23 AIN 15
MAXXECUGEN2T-MX2-32 AIN 16
MAXXECUGEN2T-MX3-24 CAN 2 L
MAXXECUGEN2T-MX3-25 CAN 2 H
MAXXECUGEN2T-MX3-12 GP Out 8 (GND) / WBO2 Sensor 2 H-
MAXXECUGEN2T-MX1-5 GP out 1 (GND)
MAXXECUGEN2T-MX1-6 GP out 2 (GND)
MAXXECUGEN2T-MX2-6 AIN 8
MAXXECUGEN2T-MX2-13 AIN 9
MAXXECUGEN2T-MX2-10 WBO2 Sensor 1 VS
MAXXECUGEN2T-MX3-10 WBO2 sensor 2 VS
5V ref
5V ref
MAXXECUGEN2T-MX1-8 GP out 4 (GND)
MAXXECUGEN2T-MX1-10 Digital/VR 1 SIGNAL +
5V ref
MAXXECUGEN2T-MX1-29 AIN 4
MAXXECUGEN2T-MX2-14 AIN 10
MAXXECUGEN2T-MX1-18 Digital/VR 2 SIGNAL +
MAXXECUGEN2T-MX1-34 INJECTOR 4
MAXXECUGEN2T-MX1-32 INJECTOR 2
0V sensor
0V sensor
MAXXECUGEN2T-MX2-4 AIN 6
MAXXECUGEN2T-MX2-5 AIN 7
MAXXECUGEN2T-MX1-4 Ignition 4
MAXXECUGEN2T-MX1-2 Ignition 2
MAXXECUGEN2T-MX1-31 INJECTOR 1
MAXXECUGEN2T-MX1-33 INJECTOR 3
5V ref
5V ref
MAXXECUGEN2T-MX1-27 AIN 2
MAXXECUGEN2T-MX1-1 Ignition 1
MAXXECUGEN2T-MX1-3 Ignition 3
MAXXECUGEN2T-MX1-17 GP out 5 (GND)
MAXXECUGEN2T-MX2-3 GP out 6 (GND)
MAXXECUGEN2T-MX2-28 KNOCK 1+
MAXXECUGEN2T-MX2-31 KNOCK 2+
0V sensor
MAXXECUGEN2T-MX2-33 INJECTOR 5
MAXXECUGEN2T-MX2-7 GP out 13 (H-BRIDGE 1)
MAXXECUGEN2T-MX2-8 GP out 14 (H-BRIDGE 1)
ECM + coil power (J271 relay feed)
OEM-T121
Stock ECU being replaced
1ECU ground
2ECU ground
3Ignition switch +12V (term 15)
5Wideband lambda heater (Z19)
21ECM power (J271 relay feed)
22Brake vacuum pump (V192)
25V144 Evaporative diagnostic pump (Pin 2)
28Alternator DF terminal (charge warning)
29MAF sensor ground (G70)
33Accelerator pedal position 1 (G79)
34Accelerator pedal position 1 ground (G79)
35Accelerator pedal position 2 (G185)
36Accelerator pedal position 2 ground (G185)
38Cruise control switch (E45)
39Clutch pedal switch (F36)
40A/C signal
41A/C signal
47Check engine light (MIL)
48EPC warning light
49Power steering pressure switch (F88)
51Wideband lambda pump (G39)
52Wideband lambda pump (G39)
53MAF sensor signal (G70)
54Road speed signal (VSS)
55Brake pedal switch (F)
56Brake pedal switch (F)
57Cruise control switch (E45)
58CAN bus low
60CAN bus high
63Post-cat lambda heater (Z29)
65Fuel pump relay control
66Secondary-air pump relay (J299)
68Post-cat lambda signal (G130)
69Post-cat lambda signal (G130)
70Wideband lambda Nernst signal (G39)
71Wideband lambda Nernst signal (G39)
72Accelerator pedal position 1 5V supply (G79)
73Accelerator pedal position 2 5V supply (G185)
80V144 Evap Diagnostic Pump (Pin 1)
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)
92Throttle position sensor 2 (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)
107Knock sensor 2 (G66)
108Sensor ground
115VVT camshaft adjustment valve (N205)
117Throttle motor G186 (+)
118Throttle motor G186 (−)
121ECM + coil power (J271 relay feed)
MAXXECUGEN2T
MAXXECUGEN2T-MX1
MAXXECUGEN2T
1Ignition 1
2Ignition 2
3Ignition 3
4Ignition 4
5GP out 1 (GND)
6GP out 2 (GND)
7GP out 3 (GND)
8GP out 4 (GND)
9Engine gnd
10Digital/VR 1 SIGNAL +
12Digital/VR 1 POWER SUPPLY
14SENSOR GND
17GP out 5 (GND)
18Digital/VR 2 SIGNAL +
20Digital/VR 2 POWER SUPPLY
225V power supply
23Digital/VR 3 SIGNAL +
24Digital/VR 4 SIGNAL +
2512V supply 1
26AIN 1
27AIN 2
28AIN 3
29AIN 4
30AIN 5
31INJECTOR 1
32INJECTOR 2
33INJECTOR 3
34INJECTOR 4
OEM-T121-102 Ignition coil 1 (N127)
OEM-T121-95 Ignition coil 2 (N128)
OEM-T121-103 Ignition coil 3 (N158)
OEM-T121-94 Ignition coil 4 (N163)
OEM-T121-65 Fuel pump relay control
OEM-T121-66 Secondary-air pump relay (J299)
OEM-T121-25 V144 Evaporative diagnostic pump (Pin 2)
OEM-T121-80 V144 Evap Diagnostic Pump (Pin 1)
GND
OEM-T121-82 Crank position sensor (G28)
5V ref
0V sensor
OEM-T121-104 Boost control solenoid (N75)
OEM-T121-86 Camshaft position sensor (G40)
5V ref
5V ref
OEM-T121-54 Road speed signal (VSS)
OEM-T121-28 Alternator DF terminal (charge warning)
12V supply 1
OEM-T121-53 MAF sensor signal (G70)
OEM-T121-101 Boost pressure sensor (G31)
OEM-T121-33 Accelerator pedal position 1 (G79)
OEM-T121-84 Throttle position sensor 1 (G187)
OEM-T121-35 Accelerator pedal position 2 (G185)
OEM-T121-96 Injector 1 (N30)
OEM-T121-89 Injector 2 (N31)
OEM-T121-97 Injector 3 (N32)
OEM-T121-88 Injector 4 (N33)
MAXXECUGEN2T-MX2
MAXXECUGEN2T
3GP out 6 (GND)
4AIN 6
5AIN 7
6AIN 8
7GP out 13 (H-BRIDGE 1)
8GP out 14 (H-BRIDGE 1)
9Engine gnd
10WBO2 Sensor 1 VS
12GP OUT 7 / WBO2 Sensor 1 H-
13AIN 9
14AIN 10
15AIN 11
16AIN 12
17AIN 13
19WBO2 sensor 1 IP
22AIN 14
23AIN 15
2412V supply 3
2512V supply 2
28KNOCK 1+
31KNOCK 2+
32AIN 16
33INJECTOR 5
34INJECTOR 6
OEM-T121-105 Diverter valve (N249)
OEM-T121-92 Throttle position sensor 2 (G188)
OEM-T121-93 Engine coolant temperature (G62)
OEM-T121-68 Post-cat lambda signal (G130)
OEM-T121-117 Throttle motor G186 (+)
OEM-T121-118 Throttle motor G186 (−)
GND
OEM-T121-70 Wideband lambda Nernst signal (G39)
OEM-T121-5 Wideband lambda heater (Z19)
OEM-T121-69 Post-cat lambda signal (G130)
OEM-T121-85 Intake air temperature (G42)
OEM-T121-40 A/C signal
OEM-T121-41 A/C signal
OEM-T121-49 Power steering pressure switch (F88)
OEM-T121-51 Wideband lambda pump (G39)
OEM-T121-55 Brake pedal switch (F)
OEM-T121-56 Brake pedal switch (F)
OEM-T121-3 Ignition switch +12V (term 15)
12V supply 2
OEM-T121-106 Knock sensor 1 (G61)
OEM-T121-107 Knock sensor 2 (G66)
OEM-T121-57 Cruise control switch (E45)
OEM-T121-115 VVT camshaft adjustment valve (N205)
OEM-T121-22 Brake vacuum pump (V192)
MAXXECUGEN2T-MX3
MAXXECUGEN2T
9Engine gnd
10WBO2 sensor 2 VS
12GP Out 8 (GND) / WBO2 Sensor 2 H-
19WBO2 sensor 2 IP
21Digital/VR 5 SIGNAL +
24CAN 2 L
25CAN 2 H
26Digital/VR 6 SIGNAL +
29INJECTOR 7
30INJECTOR 8
GND
OEM-T121-71 Wideband lambda Nernst signal (G39)
OEM-T121-63 Post-cat lambda heater (Z29)
OEM-T121-52 Wideband lambda pump (G39)
OEM-T121-38 Cruise control switch (E45)
OEM-T121-58 CAN bus low
OEM-T121-60 CAN bus high
OEM-T121-39 Clutch pedal switch (F36)
OEM-T121-47 Check engine light (MIL)
OEM-T121-48 EPC warning light
SP-GND · 6 pins
SP-0V · 8 pins
SP-5V1 · 4 pins
SP-14V · 5 pins
SP-5V2 · 4 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.
76 / 76 connections
Columns ▾
Lengths need a layout. Add bundles in Layout.
Not set yet: signal, colour, stripe, ident.
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