Power to Win



Engine Control

X3 ECU

Connector pin assignment and functions.

Main Connector

Pin Description Comments
1 .. Ignition 1 See notes
2 .. Ignition 2
3 .. Ignition 3
4 .. Injector 1 See notes
5 .. Injector 2
6 .. Injector 3
7 .. Injector 4
8 .. Fuel Pump NOS 5 option
9 .. Lambda Heater 8 amps max.
10 .. Valve 1 10 amps max.
11 .. Not Used
12 .. Throttle Position 0-5 volts
13 .. Airbox Pressure 0-5 volts
14 .. Exhaust Pressure 0-5 volts
15 .. Fuel Pressure 0-5 volts
16 .. Oil Pressure 0-5 volts
17 .. Tach Output 12 volt rising edge
18 .. Injector 5 See notes
19 .. Injector 6
20 .. Injector 7
21 .. Injector 8
22 .. Not Used
23 .. Not Used
24 .. Not Used
25 .. Not Used
26 .. ECU 12v
27 .. Lambda 1
28 .. Not Used
29 .. Not Used
30 .. Not Used
31 .. Not Used
32 .. Lambda 2
33 .. Not Used
34 .. Not Used
35 .. Not Used
36 .. Not Used
37 .. Ignition 4 See notes
38 .. Not Used
39 .. Not Used
40 .. Not Used
41 .. Not Used
42 .. Not Used
43 .. Not Used
44 .. Fuel Temperature NTC Input
45 .. Air Temperature NTC Input
46 .. Water Temperature NTC Input
47 .. Oil Temperature NTC Input
48 .. Crank Pickup
49 .. Sync Pickup
50 .. Frontwheel
51 .. Rearwheel
52 .. Mixture Switch Use EFI Part No. 62-605
53 .. Boost Switch Doubles as Gear Position
54 .. STP 1 NOS 1 option
55 .. STP 2 NOS 2 option
56 .. STP 3 NOS 3 option
57 .. STP 4 NOS 4 option
58 .. Knock 1 Option for Pedal position
59 .. Cooling Fan 2.5 amps max.
60 .. Shift Lamp 2.5 amps max.
61 .. RXD Expansion Box
62 .. TXD Output Dash driver or 3rd party ECU link
63 .. Switch 1 ECU kill switch
64 .. Switch 2 Map select switch
65 .. Shift Cut Input
66 .. Pit Limiter switch NOS - Enable switch
67 .. Beacon NOS - Clutch switch
68 .. Not Used
69 .. Not Used
70 .. VREF 5V @200mA max.
71 .. VREF 5V @200mA max.
72 .. GND
73 .. GND
74 .. GND
75 .. GND
76 .. GND
77 .. PWR GND Connect to Battery
78 .. PWR GND Connect to Battery
79 .. PWR GND Connect to Battery

Download port

Pin Description Comments
1 .. TXD
2 .. ..
3 .. RXD
4 .. ..
5 .. GND

Notes