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Is it possible that anybody here has a copy of the ECU wiring diagram for our cars (any trim level except the Si)?

The pinout to be more technical.

 
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Connector A (31 Pins)

1-blk/wht-Primary O2 sensor heater control
2-yel/blk-Power Source
3-yel/blk-Power source
4-blk-Power ground
5-blk-Power ground
6-wht-Primary O2 sensor
7-blu-Crankshaft position
8-yel-Sensor return volt
9-red/blu-Knock sensor
10-grn/yel-Sensor ground
11-grn/wht-Sensor ground
12-blk/red-Idle air control valve
13-wht/blk-EGR Valve position
14-blk/wht-Secondary O2 sensor heater control
15-red/blk-Throttle position sensor
18-wht/grn-Vehicle speed sensor
19-grn/red-MAP Sensor
20-yel/blu-Sensor Voltage Supply
21-yel/red-Sensor Voltage Supply
23-brn/yel-Logic ground
24-brn/yel-logic ground
25-wht/red-Secondary O2 Sensor
26-grn-Top dead center sensor
27-brn-Igniton coil 4
28-wht/blu-coil 3
29-blu/red-coil 2
30-yel/grn-coil 1

Connector B (24 Pins)
2-yel-Fuel injector 4
3-blu-Injector 3
4-red-Injector 2
5-brn-Injector 1
6-grn-Radiator fan control
7-red/blk-A/T Pressure control solenoid valve A
8-red/wht-Engine Coolent sensor
9-blu/blk-VTEC Oil pressure switch
10-wht/blu-Alternator L Signal
13-wht/red-Alternator FR Signal
14-blu/red-EGR Valve
15-grn/yel-VTEC Solenoid valve
16-blk/red-A/T Pressure control solenoid valve B
17-red/yel-Intake air temp sensor
18-wht/grn-Alternator control
21-yel/blu-EVAP Canistor purge valve

Connector C (22 Pins)
1- wht/blk-A/T Pressure control solenoid valve A
2-yel/blu-Torque converter clutch solenoid
4-grn/wht-Shift solenoid B
6-blu/blk-Shift Solenoid A
7-wht/red-Mainshaft speed sensor
8-brn/wht-A/T Pressure control solenoid valve B
9-red-Position switch D3
10-wht-position switch R
11-blu-position switch 2
12-blu/wht-position switch neutral or park
14-grn-countershaft speed sensor ground
15-blu-countershaft speed sensor
18-blu/yel-position switch D3 or D
20-yel-position switch D
21-wht/grn-mainshaft speed sensor ground

Connector E (31 pins)
1-grn/yel-Immobilizer fuel pump relay
2-wht/red-Secondary O2 Sensor
3-brn/yel-Logic ground
4-pnk-Sensor ground
5-yel/blu-Sensor voltage source
6-blk/wht-Secondary O2 sensor heater control
7-red/yel-PGM-FI main relay 1
9-yel/blk-Ignition input signal
12-blu/orn-Cruise control signal
13-wht/blu-Interlock control unit
14-lt grn-Fuel tank pressure sensor
15-grn/red-Electrical load detector
16-lt grn/blk-Power steering pressure switch
18-red-A/C Clutch
20-blu/red-EVAP bypass solenoid valve
21-lt grn/red-EVAP Canister shut valve
22-wht/blk-Brake pedal position switch
23-lt blu-K line
24-yel-Multiplex control unit comm line
26-blu-Engine speed pulse
27-red/blu-Immobilizer code
29-brn-Service check signal
30-red/wht-Write enable signal
31-grn/orn-MIL or check engine light enable


I'll admit I was bored at work but hey if it helps one person, enjoy !!!

 
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Hey man,
Are you working at Honda Dealer?
And as I remember, there are 3 connectors on ECU, aren't there?

 
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Is that only for the EX and if so can you hook me up with the LX diagram.

 
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Damn dude. You are the man. I didn't think anybody would reply to this thread. Thanks a lot!

 
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I should have been a little more specific on models, etc sorry.

Connector C or the 3rd one going from top to bottom serves the auto transmission only so if you have a manual you will not have this connector or wires at all and only have like Vytas said 3 connectors. If you look at the ECM there will be a white plastic cover in its place.

If you have any model but EX just ignore all references to VTEC and EGR, there will just be an "empty" spot in that pin with no wire.

I just listed 2 wire colors to get you started to tell you where pin one is and just go left to right. if you need other wire colors or even what you can do with them just let me know.

I should also tell you that for ALL BUT EX, the secondary O2 heater and sensor wires are in connector A

For EX the secondary O2 heater and sensor wires are in connector E or the 4th connector down- the wires are however the same color.

Those are the only differences between models.

 
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and wheres the VTM Wire?

 
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is this the "correct" diagram???

 
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I think you help with this. Specifically searching VTM wire in ECU.

 
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so, where's the VTM wire? i don't see it...

 
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Connector B

9-blu/blk-VTEC Oil pressure switch

This one is the Famous VTM wire

 
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oh. and what about this diode thing... why do we need it, and do we really need it?