Cosworth BOA - Ford ECU Pinout

Your bible. Though to be honest the major components are easy as the various multiplugs can only be plugged into the correct matching components. It's the more subtle connections that cause the headaches, such as which wire switches the blumin thing on? In this case there was no bespoke switch on wire, it was incorporated into what they referred to as the 'Power Splice'. In this case it is pin 57. But this alone won't make the engine run as the various sensors and drivers also need feeding from the power splice. Fortunately it is all built into the engine loom.
There are some additional notes at the bottom of the list.

  1. Permanent Live Feed/Battery +ve
  2. Brake On/Off (BOO) Switch – part of diagnostics system
  3. Vehicle Speed Sensor (VSS)
  4. EDIS Module Pin 2 & Rev Counter Signal
  5. .
  6. .
  7. Engine Coolant Temperature Sensor (ECT)
  8. Kick Down Switch (KDS) for automatic transmission and also used as part of diagnostics system
  9. FDS2000 Diagnostics Computer Socket (later deleted)
  10. Air Conditioning Low Pressure Switch (raises idle rpm to maintain A.C. system pressure)
  11. .
  12. .
  13. .
  14. Mass Air Flow Sensor (MAF)
  15. Mass Air Flow Sensor (MAF)
  16. EDIS Module Pin 4 (Shielded)
  17. Diagnostics Socket – Fault Code Reader (3 pin socket under bonnet)
  18. .
  19. .
  20. Ground
  21. Idle Speed Control Valve (ISCV)
  22. Fuel Pump Relay Switching
  23. .
  24. .
  25. Air Charge Temperature Sensor (ACT)
  26. Throttle Position Sensor (TPS) & Exhaust Pressure Transducer (EPT)
  27. Exhaust Pressure Transducer (EPT) Signal
  28. FDS2000 Diagnostics Computer Socket (later deleted)
  29. HEGO (Lambda) Sensor – L.H.
  30. Park/Neutral Switch (automatic transmission)
  31. Canister Purge Solenoid (EVAP) –part of fuel tank venting system
  32. .
  33. Electronic Vacuum Regulator (EVR)
  34. Signal to Trip Computer
  35. .
  36. EDIS Module Pin 3
  37. Input from Power Splice – Power splice also supplies Sensors and Relays
  38. .
  39. HEGO (Lambda) Sensor – R.H.
  40. Mass Air Flow Sensor (MAF) & Battery –ve
  41. .
  42. .
  43. .
  44. .
  45. .
  46. ACT, EPT, TPS & ECT Sensor Supplies
  47. Throttle Position Sensor (TPS) Signal
  48. Diagnostics Socket- Fault Code Reader (3 pin socket under bonnet)
  49. Engine Ground
  50. .
  51. .
  52. 3rd/4th Gear Shift (automatic transmission)
  53. Torque Convertor lock up solenoid (automatic transmission)
  54. Air Conditioning
  55. .
  56. EDIS Module Pin 1
  57. Input from Power Splice – Power splice also supplies Sensors and Relays
  58. Injectors 1, 2 & 3
  59. Injectors 4, 5 & 6
  60. Battery –ve

Redundant pins:

Total: 2, 3, 8, 9, 10, 27, 28, 30, 31, 33, 34, 52, 53, 54

These consist of:

Autobox Pins: 8, 30, 52, 53
Emissions Pins: 27, 31, 33
Non – essential: 2, 3, 9, 10, 28, 34, 54 

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