I am on a mission to figure out what all the pins do for a 2g ECU
I am going off of the diagram from
Visual Frequently Answered Questions - Home Page
And there are a couple that are left blank. I know maybe a couple of them are relays when the ecu is connected in.
I am building a megasquirt, would like to delete the ECU and just use the Megasquirt system. I know a couple of people have done it so it is possible.
Pin Connection Pin Connection
1 No. 1 Injector
14 No. 2 Injector
2 No. 3 Injector
15 No. 4 Injector
3 Fuel pressure solenoid
16 Boost meter
4 Idle Speed Control (ISC) motor coil (A1)
17 ISC motor coil (A2)
5 ISC motor coil (B1)
18 ISC motor coil (B2)
6 EGR Solenoid
19 Volume air flow sensor reset signal
7 Engine/transaxle general control torque reduction request signal 1
20 Cooling fan motor relay (high)
8 Fuel pump relay
21 Cooling fan motor relay (low)
9 Evaporate emission purge solenoid
22 AC compressor clutch relay
10 Ignition power transistor (A - to coil for cyl 1&4)
23 Ignition power transistor (B - to coil for cyl 2&3)
11 Turbo wastegate solenoid
24
12 Power supply
25 Power supply
13 Power supply
26
Pin Connection Pin Connection
31
39
32
40
33 Generator G terminal (what does this mean and is it really needed)
41 Generator FR terminal (what does this mean and is it really needed)
34
42 AC intermediate pressure switch
35
43 Engine/transaxle general control torque reduction request signal 2
36 Check Engine light
44
37 Power steering pressure switch
45 AC switch
38 MFI relay (power supply)
46 Engine/transaxle general control torque execution signal
Pin Connection Pin Connection
51
57
52
58 Engine ignition signal
53
59
54 O2 sensor heater (rear)
60 O2 sensor heater (front)
55
61
56
62
Pin Connection Pin Connection
71 Ignition switch - ST
82
72 Intake air temp sensor
83 Coolant temp sensor
73 Manifold differential pressure sensor
84 Throttle position sensor
74
85 Barometric pressure sensor
75 O2 sensor (rear)
86 Vehicle speed sensor
76 O2 sensor (front)
87 Closed throttle position switch (Idle switch)
77
88 Camshaft position sensor
78
89 Crankshaft position sensor
79
90 Volume air flow sensor
80 Backup power supply
91 Park/Neutral position switch (used on ATs only)
81 Sensor impressed voltage
92 Ignition switch - IG
Thanks for your help!
Linear Mode
