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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.

Components

RefKindPartExclude from BOM
MS3PROMINI-Aconnector
OEM-T121connector
SP-0Vsplice
SP-14Vsplice
SP-5V1splice
SP-GNDsplice

Create part

Cut list

Lengths need a layout (0 of 46 routed).

WireFrom / ToGaugeSignal
W1OEM-T121-121 / SP-14V-10.85ECM + coil power (J271 relay feed)
W2OEM-T121-21 / SP-14V-10.85ECM power (J271 relay feed)
W3SP-14V-1 / MS3PROMINI-A-10.8512V+ switched power in
W4OEM-T121-1 / SP-GND-10.85ECU ground
W5OEM-T121-2 / SP-GND-10.85ECU ground
W6SP-GND-1 / MS3PROMINI-A-220.85Power ground
W7SP-GND-1 / MS3PROMINI-A-230.85Power ground
W8OEM-T121-108 / SP-0V-10.5Sensor ground
W9OEM-T121-29 / SP-0V-10.5MAF sensor ground (G70)
W10OEM-T121-34 / SP-0V-10.5Accelerator pedal position 1 ground (G79)
W11OEM-T121-36 / SP-0V-10.5Accelerator pedal position 2 ground (G185)
W12OEM-T121-90 / SP-0V-10.5Crank position sensor ground (G28)
W13OEM-T121-91 / SP-0V-10.5Throttle position sensor ground (G187/G188)
W14SP-0V-1 / MS3PROMINI-A-210.5Sensor ground
W15OEM-T121-72 / SP-5V1-10.5Accelerator pedal position 1 5V supply (G79)
W16OEM-T121-73 / SP-5V1-10.5Accelerator pedal position 2 5V supply (G185)
W17OEM-T121-83 / SP-5V1-10.5Throttle position sensor 5V supply (G187/G188)
W18OEM-T121-98 / SP-5V1-10.5Cam + boost sensor 5V supply (G40/G31)
W19OEM-T121-99 / SP-5V1-10.5Knock sensor 5V supply (G61/G66)
W20SP-5V1-1 / MS3PROMINI-A-20.5+5V VREF out
W21OEM-T121-82 / MS3PROMINI-A-300.5Crank position sensor (G28)
W22OEM-T121-86 / MS3PROMINI-A-320.5Camshaft position sensor (G40)
W23OEM-T121-102 / MS3PROMINI-A-170.5Ignition coil 1 (N127)
W24OEM-T121-95 / MS3PROMINI-A-180.5Ignition coil 2 (N128)
W25OEM-T121-103 / MS3PROMINI-A-190.5Ignition coil 3 (N158)
W26OEM-T121-94 / MS3PROMINI-A-200.5Ignition coil 4 (N163)
W27OEM-T121-96 / MS3PROMINI-A-100.5Injector 1 (N30)
W28OEM-T121-89 / MS3PROMINI-A-110.5Injector 2 (N31)
W29OEM-T121-97 / MS3PROMINI-A-120.5Injector 3 (N32)
W30OEM-T121-88 / MS3PROMINI-A-50.5Injector 4 (N33)
W31OEM-T121-53 / MS3PROMINI-A-130.5MAF sensor signal (G70)
W32OEM-T121-101 / MS3PROMINI-A-140.5Boost pressure sensor (G31)
W33OEM-T121-33 / MS3PROMINI-A-280.5Accelerator pedal position 1 (G79)
W34OEM-T121-84 / MS3PROMINI-A-150.5Throttle position sensor 1 (G187)
W35OEM-T121-35 / MS3PROMINI-A-160.5Accelerator pedal position 2 (G185)
W36OEM-T121-93 / MS3PROMINI-A-260.5Engine coolant temperature (G62)
W37OEM-T121-65 / MS3PROMINI-A-40.5Fuel pump relay control
W38OEM-T121-66 / MS3PROMINI-A-30.5Secondary-air pump relay (J299)
W39OEM-T121-5 / MS3PROMINI-A-60.5Wideband lambda heater (Z19)
W40OEM-T121-63 / MS3PROMINI-A-70.5Post-cat lambda heater (Z29)
W41OEM-T121-104 / MS3PROMINI-A-80.5Boost control solenoid (N75)
W42OEM-T121-105 / MS3PROMINI-A-90.5Diverter valve (N249)
W43OEM-T121-85 / MS3PROMINI-A-270.5Intake air temperature (G42)
W44OEM-T121-54 / MS3PROMINI-A-340.5Road speed signal (VSS)
W45OEM-T121-60 / MS3PROMINI-A-250.5CAN bus high
W46OEM-T121-58 / MS3PROMINI-A-240.5CAN bus low

Bill of materials

No parts in this harness.