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
M190-A-1 Low Side Injector 3
M190-A-25 Low Side Injector 7
ECM power (J271 relay feed)
0V sensor
M190-C-35 Analogue Voltage Input 3
0V sensor
M190-C-29 Analogue Voltage Input 5
0V sensor
M190-B-a Low Side Injector 5
M190-A-40 Low Side Injector 6
M190-C-42 Analogue Voltage Input 1
M190-C-25 Universal Digital Input 3
M190-C-31 CAN Bus 1 Low
M190-C-24 CAN Bus 1 High
Battery constant +12V (term 30)
M190-B-b Low Side Injector 3
M190-B-T Low Side Injector 6
M190-A-2 Low Side Injector 2
M190-B-V Low Side Injector 2
M190-A-7 Lambda Narrow Input 1
M190-A-6 Lambda Narrow Input 2
5V ref
5V ref
M190-C-18 Universal Digital Input 1
5V ref
M190-C-28 Analogue Voltage Input 4
M190-C-39 Analogue Temperature Input 2
M190-C-32 Universal Digital Input 2
M190-A-12 Peak Hold Injector 2
M190-A-3 Low Side Injector 1
0V sensor
0V sensor
M190-C-11 Analogue Voltage Input 6
M190-C-37 Analogue Temperature Input 1
M190-C-1 Low Side Ignition 4
M190-C-8 Low Side Ignition 2
M190-A-11 Peak Hold Injector 1
M190-B-U Low Side Injector 1
5V ref
5V ref
M190-C-36 Analogue Voltage Input 2
M190-C-16 Low Side Ignition 1
M190-C-2 Low Side Ignition 3
M190-A-5 Low Side Injector 4
M190-B-S Low Side Injector 4
M190-C-51 Knock Input 1
M190-C-44 Knock Input 2
0V sensor
M190-A-48 Low Side Injector 5
M190-B-A Half Bridge Output 1
M190-B-B Half Bridge Output 2
ECM + coil power (J271 relay feed)
OEM-T121
Stock ECU being replaced
1ECU ground
2ECU ground
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)
47Check engine light (MIL)
48EPC warning light
53MAF sensor signal (G70)
54Road speed signal (VSS)
58CAN bus low
60CAN bus high
62Battery constant +12V (term 30)
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)
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)
M190
M190-A
M190
1Low Side Injector 3
2Low Side Injector 2
3Low Side Injector 1
5Low Side Injector 4
6Lambda Narrow Input 2
7Lambda Narrow Input 1
8Sensor 5.0V C1
9Sensor 5.0V C2
11Peak Hold Injector 1
12Peak Hold Injector 2
16Sensor 5.0V C3
18Sensor 0V C1
19Sensor 0V C2
20Sensor 0V C3
25Low Side Injector 7
38Battery Backup
40Low Side Injector 6
48Low Side Injector 5
OEM-T121-5 Wideband lambda heater (Z19)
OEM-T121-65 Fuel pump relay control
OEM-T121-89 Injector 2 (N31)
OEM-T121-104 Boost control solenoid (N75)
OEM-T121-69 Post-cat lambda signal (G130)
OEM-T121-68 Post-cat lambda signal (G130)
5V ref
5V ref
OEM-T121-96 Injector 1 (N30)
OEM-T121-88 Injector 4 (N33)
5V ref
0V sensor
0V sensor
0V sensor
OEM-T121-9 Secondary-air injection valve (N112)
Battery Backup
OEM-T121-48 EPC warning light
OEM-T121-115 VVT camshaft adjustment valve (N205)
M190-B
M190
aLow Side Injector 5
AHalf Bridge Output 1
bLow Side Injector 3
BHalf Bridge Output 2
cBattery Negative 6
GBattery Negative 1
HBattery Positive 1
JBattery Positive 2
KBattery Positive 3
LBattery Positive 4
SLow Side Injector 4
TLow Side Injector 6
ULow Side Injector 1
VLow Side Injector 2
WBattery Negative 2
XBattery Negative 3
YBattery Negative 4
ZBattery Negative 5
OEM-T121-47 Check engine light (MIL)
OEM-T121-117 Throttle motor G186 (+)
OEM-T121-63 Post-cat lambda heater (Z29)
OEM-T121-118 Throttle motor G186 (−)
GND
GND
Battery Positive 1
Battery Positive 2
Battery Positive 3
Battery Positive 4
OEM-T121-105 Diverter valve (N249)
OEM-T121-64 EVAP canister valve (N80)
OEM-T121-97 Injector 3 (N32)
OEM-T121-66 Secondary-air pump relay (J299)
GND
GND
GND
GND
M190-C
M190
1Low Side Ignition 4
2Low Side Ignition 3
8Low Side Ignition 2
11Analogue Voltage Input 6
14Sensor 0V A1
15Sensor 0V A2
16Low Side Ignition 1
18Universal Digital Input 1
23Sensor 0V B1
24CAN Bus 1 High
25Universal Digital Input 3
28Analogue Voltage Input 4
29Analogue Voltage Input 5
30Sensor 0V B2
31CAN Bus 1 Low
32Universal Digital Input 2
35Analogue Voltage Input 3
36Analogue Voltage Input 2
37Analogue Temperature Input 1
39Analogue Temperature Input 2
42Analogue Voltage Input 1
44Knock Input 2
48Sensor 5.0V A1
50Sensor 5.0V B1
51Knock Input 1
OEM-T121-94 Ignition coil 4 (N163)
OEM-T121-103 Ignition coil 3 (N158)
OEM-T121-95 Ignition coil 2 (N128)
OEM-T121-92 Throttle position sensor 2 (G188)
0V sensor
0V sensor
OEM-T121-102 Ignition coil 1 (N127)
OEM-T121-82 Crank position sensor (G28)
0V sensor
OEM-T121-60 CAN bus high
OEM-T121-54 Road speed signal (VSS)
OEM-T121-84 Throttle position sensor 1 (G187)
OEM-T121-35 Accelerator pedal position 2 (G185)
0V sensor
OEM-T121-58 CAN bus low
OEM-T121-86 Camshaft position sensor (G40)
OEM-T121-33 Accelerator pedal position 1 (G79)
OEM-T121-101 Boost pressure sensor (G31)
OEM-T121-93 Engine coolant temperature (G62)
OEM-T121-85 Intake air temperature (G42)
OEM-T121-53 MAF sensor signal (G70)
OEM-T121-107 Knock sensor 2 (G66)
5V ref
5V ref
OEM-T121-106 Knock sensor 1 (G61)
SP-GND · 9 pins
SP-0V · 14 pins
SP-14V · 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.
71 / 71 connections
Columns ▾
Lengths need a layout. Add bundles in Layout.
Not set yet: signal, colour, stripe, ident.
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