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
MAXXECUPRO-C3-K3 KEY IN 12V
MAXXECUPRO-C1-D1 WBO2 Heater-
MAXXECUPRO-C4-G1 GPO 23
ECM power (J271 relay feed)
0V sensor
MAXXECUPRO-C1-G2 TPS/AIN
0V sensor
MAXXECUPRO-C3-D1 ANALOG IN 6 (0-5V)
0V sensor
MAXXECUPRO-C4-G2 GPO 24
MAXXECUPRO-C1-B1 GPO 6
MAXXECUPRO-C1-C1 GPO 7
MAXXECUPRO-C1-G3 WBO2 IP
MAXXECUPRO-C3-B2 WBO2 2 IP
MAXXECUPRO-C1-J3 AIN 3 (0-5V)
MAXXECUPRO-C1-K3 DIN/VR 1
MAXXECUPRO-C4-A2 CAN 2 L
MAXXECUPRO-C4-A1 CAN 2 H
MAXXECUPRO-C3-E1 GPO 10/WBO2 2 HTR
MAXXECUPRO-C1-A4 GPO 8/TACHO
MAXXECUPRO-C1-B4 GPO 1
MAXXECUPRO-C1-C4 GPO 2
MAXXECUPRO-C3-D3 ANALOG IN 8 (0-5V)
MAXXECUPRO-C3-E2 ANALOG IN 9 (0-5V)
MAXXECUPRO-C1-F4 WBO2 VS
MAXXECUPRO-C3-B3 WBO2 2 VS
5V ref
5V ref
MAXXECUPRO-C1-H3 TRIGGER
5V ref
MAXXECUPRO-C3-C3 ANALOG IN 5 (0-5V)
MAXXECUPRO-C1-F2 IAT
MAXXECUPRO-C1-H4 HOME
MAXXECUPRO-C1-M2 INJ 4
MAXXECUPRO-C1-K2 INJ 2
0V sensor
0V sensor
MAXXECUPRO-C3-D2 ANALOG IN 7 (0-5V)
MAXXECUPRO-C1-F1 CLT
MAXXECUPRO-C1-B3 IGN 4
MAXXECUPRO-C1-A3 IGN 2
MAXXECUPRO-C1-K1 INJ 1
MAXXECUPRO-C1-M1 INJ 3
5V ref
5V ref
MAXXECUPRO-C1-J4 AIN 4 (0-5V)
MAXXECUPRO-C1-A2 IGN 1
MAXXECUPRO-C1-B2 IGN 3
MAXXECUPRO-C1-D4 GPO 3
MAXXECUPRO-C1-E4 GPO 4
MAXXECUPRO-C4-F2 Knock 1
MAXXECUPRO-C4-F3 Knock 2
0V sensor
MAXXECUPRO-C1-A1 GPO 5
MAXXECUPRO-C3-L3 GPO 11/MOTOR 1 -
MAXXECUPRO-C3-L2 GPO 12/MOTOR 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)
9Secondary-air injection valve (N112)
21ECM power (J271 relay feed)
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)
37Engine speed signal (tacho to cluster)
47Check engine light (MIL)
48EPC warning light
51Wideband lambda pump (G39)
52Wideband lambda pump (G39)
53MAF sensor signal (G70)
54Road speed signal (VSS)
58CAN bus low
60CAN bus high
63Post-cat lambda heater (Z29)
64EVAP canister valve (N80)
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)
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)
MAXXECUPRO
MAXXECUPRO-C1
MAXXECUPRO
A1GPO 5
A2IGN 1
A3IGN 2
A4GPO 8/TACHO
B1GPO 6
B2IGN 3
B3IGN 4
B4GPO 1
C1GPO 7
C4GPO 2
D1WBO2 Heater-
D4GPO 3
E4GPO 4
F1CLT
F2IAT
F4WBO2 VS
G1+5V sensor supply
G2TPS/AIN
G3WBO2 IP
H1Sensor GND
H2Trigger GND
H3TRIGGER
H4HOME
J3AIN 3 (0-5V)
J4AIN 4 (0-5V)
K1INJ 1
K2INJ 2
K3DIN/VR 1
L4Engine GND
M1INJ 3
M2INJ 4
M4+12V ECU power supply
OEM-T121-115 VVT camshaft adjustment valve (N205)
OEM-T121-102 Ignition coil 1 (N127)
OEM-T121-95 Ignition coil 2 (N128)
OEM-T121-64 EVAP canister valve (N80)
OEM-T121-47 Check engine light (MIL)
OEM-T121-103 Ignition coil 3 (N158)
OEM-T121-94 Ignition coil 4 (N163)
OEM-T121-65 Fuel pump relay control
OEM-T121-48 EPC warning light
OEM-T121-66 Secondary-air pump relay (J299)
OEM-T121-5 Wideband lambda heater (Z19)
OEM-T121-104 Boost control solenoid (N75)
OEM-T121-105 Diverter valve (N249)
OEM-T121-93 Engine coolant temperature (G62)
OEM-T121-85 Intake air temperature (G42)
OEM-T121-70 Wideband lambda Nernst signal (G39)
5V ref
OEM-T121-33 Accelerator pedal position 1 (G79)
OEM-T121-51 Wideband lambda pump (G39)
0V sensor
0V sensor
OEM-T121-82 Crank position sensor (G28)
OEM-T121-86 Camshaft position sensor (G40)
OEM-T121-53 MAF sensor signal (G70)
OEM-T121-101 Boost pressure sensor (G31)
OEM-T121-96 Injector 1 (N30)
OEM-T121-89 Injector 2 (N31)
OEM-T121-54 Road speed signal (VSS)
GND
OEM-T121-97 Injector 3 (N32)
OEM-T121-88 Injector 4 (N33)
+12V ECU power supply
MAXXECUPRO-C2
MAXXECUPRO
H1Engine ground 3
H2Engine ground 3
H3Engine ground 3
GND
GND
GND
MAXXECUPRO-C3
MAXXECUPRO
B2WBO2 2 IP
B3WBO2 2 VS
C2+5V SENSOR SUPPLY 2
C3ANALOG IN 5 (0-5V)
D1ANALOG IN 6 (0-5V)
D2ANALOG IN 7 (0-5V)
D3ANALOG IN 8 (0-5V)
E1GPO 10/WBO2 2 HTR
E2ANALOG IN 9 (0-5V)
J2SENSOR GND
J3SENSOR GND
K3KEY IN 12V
L2GPO 12/MOTOR 1 +
L3GPO 11/MOTOR 1 -
L4ENGINE GROUND 2
M412V ECU 2
OEM-T121-52 Wideband lambda pump (G39)
OEM-T121-71 Wideband lambda Nernst signal (G39)
5V ref
OEM-T121-84 Throttle position sensor 1 (G187)
OEM-T121-35 Accelerator pedal position 2 (G185)
OEM-T121-92 Throttle position sensor 2 (G188)
OEM-T121-68 Post-cat lambda signal (G130)
OEM-T121-63 Post-cat lambda heater (Z29)
OEM-T121-69 Post-cat lambda signal (G130)
0V sensor
0V sensor
OEM-T121-3 Ignition switch +12V (term 15)
OEM-T121-118 Throttle motor G186 (−)
OEM-T121-117 Throttle motor G186 (+)
GND
12V ECU 2
MAXXECUPRO-C4
MAXXECUPRO
A1CAN 2 H
A2CAN 2 L
E3+5V sensor supply 3
F2Knock 1
F3Knock 2
G1GPO 23
G2GPO 24
OEM-T121-60 CAN bus high
OEM-T121-58 CAN bus low
5V ref
OEM-T121-106 Knock sensor 1 (G61)
OEM-T121-107 Knock sensor 2 (G66)
OEM-T121-9 Secondary-air injection valve (N112)
OEM-T121-37 Engine speed signal (tacho to cluster)
SP-GND · 8 pins
SP-0V · 11 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.
72 / 72 connections
Columns ▾
Lengths need a layout. Add bundles in Layout.
Not set yet: signal, colour, stripe, ident.
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