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MS3ECU PinoutColorCommentsMS3XECU PinoutColor
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#1 CPS GND#67 CPS GNDBLK1 INJ GconnectorGRY
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#2 CPS Screen Ground#28 Engine GroundBLK2 GND#34BLK
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#3 SPR1CANH (connector)YLW3 GND#34BLK
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#4 SPR2CANL (connector)BLUE4 INJ FconnectorWHT
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#5 SPR3ConnectorWHT5 FLEXConnectorPURP
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#6 SPR4ConnectorGRN6 BOOSTConnectorORG
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#7 Sensor Ground#43 TPS & Coolant Ground
#14 IAT GND
#44 CAS GND
#71 O2 GND		BLK#14 on ECU IS #5 ON AFM 7 INJ EconnectorBWN
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#8 Spare GroundConnectorBLK8 GND#55BLK
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#9 Spare GroundConnectorBLK9 IDLE#29 Idle Speed ControlBLUE
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#10 Spare GroundConnectorBLK10 INJ DFreeGRN
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#11 Spare GroundConnectorBLK11 LAUNCH INConnectorYLW
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#12 Spare GroundConnectorBLK12 GND#55BLK
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#13 Spare GroundConnectorBLK13 INJ CFreePURP
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#14 Spare GroundConnectorBLK14 SPARK AFreeORG
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#15 Power Ground#34BLK15 SPARK CFreeGRY
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#16 Power Ground#6BLK16 INJ B#3 Fuel Inj Cntrl #2 & #4BWN
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#17 Power Ground#6BLK17 GND#55BLK
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#18 Power Ground#6 BLK18 SPARK GconnectorWHT
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#19 Power Ground#6BLK19 INJ A#32 Fuel Inj Cntrl #1 & #3PURP
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#20 Air Temperature#77 Air Inlet TempORG#4 on AFM 20 INJ HconnectorWHT
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#21 Coolant Temp#78 Coolant TempBLUE21 SPARE ADCconnectorGRN
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#22 TPS Input#12 TPSWHT22 EGO2connectorORG
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#23 O2 Sensor#70 O2 SignalBWN23 EXT_MAPconnectorYLW
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#24 CPS Signal#68 CPS SignalPURP24 NITROUS 1connectorBLUE
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#25 IAC1AconnectorYLW25 NITOUS 2connectorBWN
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#26 5V Supply TPS#59 Reference OutputRED26 TACHO#74 TACH PURP
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#27IAC1B (D)connectorGRY27 VVTconnectorWHT
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#28 +12V In#54 Power InputRED28 TABLESWTCH IN#73 VSSYLW
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#29 IAC2A (C)connectorGRN29 NITROUS IN#86 AC InputGRY
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#30 Idle Vavle Output#37 O2 RelayWHT30 DATALOG INconnectorORG
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#31 IAC2B (B)connectorBLUE31 PT4connectorBLUE
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#32 Injector Bank 1 OutputconnectorYLW32 CAM INPUT#16 CAS Signal GRN
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#33 Injector Bank 1 OutputconnectorORG33 SPARK BFreeRED
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#34 Injector Bank 2 OutputconnectorGRN34 SPARK DFreeYLW
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#35 Injector Bank 2 OutputconnectorPURP35 SPARK EconnectorORG
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#36 Ignition (A)connectorBLUE36 SPARK FconnectorPURP
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#37 Fuel Pump Relay Output#1 Fuel Pump RLY CTRGRY37 SPARK HconnectorGRN
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Sequential Fuel Step by StepIgnitor Board
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1. For Inj1 no change is needed14 SPARK A#25 Coil1
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2. Cut harness line for Inj3 and run new wire to connector
33 SPARK B#24 Coil3
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3. Desolder INJB from pin #3 on connector
15 SPARK C#51 Coil 4
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4. Solder Inj3 line to INJB 34 SPARK D#52 Coil 2
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5. Inj4 is left alone in the harness
#5#55 (GND)
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6. Connect INJC (Pin 13 on MS3X) to pin #3 on connector
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7. Cut harness line for Inj2 and run new wire to connector
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8. Solder Inj2 line to INJD (Pin 10 on MS3X)
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#3 SPR1#1 CANH (connector)YLW1 INJ G#1 connectorGRY
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#4 SPR2#2 CANL (connector)BLUE4 INJ F#2 connectorWHT
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#5 SPR3#3 ConnectorWHT5 FLEX#3 ConnectorPURP
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#6 SPR4#4 ConnectorGRN6 BOOST#4 ConnectorORG
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#8 Spare Ground#5 ConnectorBLK7 INJ E#5 connectorBWN
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#9 Spare Ground#6 ConnectorBLK11 LAUNCH IN#6 ConnectorYLW
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#10 Spare Ground#7 ConnectorBLK18 SPARK G#7 connectorWHT
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#11 Spare Ground#8 ConnectorBLK20 INJ H#8 connectorWHT
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#12 Spare Ground#9 ConnectorBLK21 SPARE ADC#9 connectorGRN
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#13 Spare Ground#10 ConnectorBLK22 EGO2#10 connectorORG
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#14 Spare Ground#11 ConnectorBLK23 EXT_MAP#11 connectorYLW
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#25 IAC1A#12 connectorYLW24 NITROUS 1#12 connectorBLUE
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#27IAC1B (D)#13 connectorGRY25 NITOUS 2#13 connectorBWN
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#29 IAC2A (C)#14 connectorGRN27 VVT#14 connectorWHT
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#31 IAC2B (B)#15 connectorBLUE30 DATALOG IN#15 connectorORG
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#32 Injector Bank 1 Output#16 connectorYLW31 PT4#16 connectorBLUE
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#33 Injector Bank 1 Output#17 connectorORG35 SPARK E#17 connectorORG
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#34 Injector Bank 2 Output#18 connectorGRN36 SPARK F#18 connectorPURP
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#35 Injector Bank 2 Output#19 connectorPURP37 SPARK H#19 connectorGRN
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#36 Ignition (A)#20 connectorBLUE5VREF#20 connectorRED
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