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Old Apr 7, 2005
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Talking ECU Swap Automatic or Manual?

I have a 01 LX Manual tranny and going to do Head swap! my friend has a 02 automatic ECU that he could get me. Will this automatic ecu work with a manual trans car or will it not because of fuel and ignition maps? Yes i am aware of reflashing ECU and Yes i know i wont see a big difference but i am going with turbo after the swap, this swap is just going to get my by until i get the turbo and the motor built up to handle high psi.
Thanks for you inputs
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Old Apr 7, 2005
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Sounds like someone needs to search...
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Old Apr 7, 2005
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if you dont know please do not comment! thank you
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Old Apr 7, 2005
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Um, if you knoew, you wouldn't be asking "Will this automatic ecu work with a manual trans car or will it not because of fuel and ignition maps?"

So maybe you should educate yourself and not waste people's time when you could find it on your own.
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Old Apr 7, 2005
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Dude whats ur prob, i have spent at least a week on research and could not fine any info on this subject.. Its not a joe blow question just a tech question. yes it prob wont work because of the maps but i wanted to make sure, so once again if you dont know please do not reply and tell me to educate myself
If anybody has any information on this please post, your posts will be greatly helpful
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Old Apr 7, 2005
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If you have a 5 speed the auto ECU will work, but you will probably get a CEL (If you can live with it). Don't quote me on the CEL part but I'll promise you it can work. And pointless, you can tell someone to search, and THEN tell them the answer, but your just as guilty of using up bandwith by just posting search. See how big this thread got because you didn't simply say "search next time, but here is your answer."
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Old Apr 7, 2005
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ya know, ,this is like the 4th post where teampointless has replied with search. i thought this website was supposed to be informative, if you have a question ask.....always gotta be that one *** to mess it up though. if you cant help, or dont want to help, dont reply...........
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Old Apr 8, 2005
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yes thank you
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Old Apr 8, 2005
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So lets say i havce and auto, all i would need would be the tranny, subframe, and tidbit, and could keep my ecu?? wouln't it be trying to controll the tranny??
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Old Apr 8, 2005
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yup... thats what i was thinking thanks for all your help. End result MIL.... Not something im going to live with. My friend works at a honda dealer so i will have to wait for the correct ecu to pop up.
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Old Apr 10, 2005
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yeah i wanted to know that to, i plan on doing the tranny swap to
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Old Apr 10, 2005
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Originally Posted by teampointless
Um, if you knoew, you wouldn't be asking "Will this automatic ecu work with a manual trans car or will it not because of fuel and ignition maps?"

So maybe you should educate yourself and not waste people's time when you could find it on your own.

two replies by you and no help for the dude.



good luck with the swap!
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Old Apr 13, 2005
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I found a 01 EX ECU for the project on ebay for 15 bucks. Now all i have to do is port and polish the head, jam it on and wirer it up
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Old Apr 13, 2005
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heres a small tidbit that i think you guys might have overlooked... what trim is your car.. is it dx/lx or ex... if you use the ex ecu on a dx/lx setup you will get a CEL saying the vtec is malfunctioning..now if your car is a dx/lx and plan to swap a ex head on there and plan to use the ex ecu then your going to need to wire up the vtec into the wireharness cause the dx/lx harness does not have the wires in there...best thing to do is find the EX manual harness along with the 5 speed ecu
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Old Apr 13, 2005
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Yeah your right, but his question was will it work, and the answer was yes
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Old Apr 13, 2005
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Originally Posted by TheSmuggler
Yeah your right, but his question was will it work, and the answer was yes
true.. but doesnt hurt to provide a little more info so that way he knows already that he/she will be getting the CEL ahead of time.. lol
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Old Apr 13, 2005
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I know, I just can't let you be showin' me up
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Old Apr 13, 2005
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Talking

haha.. its all about teamwork..
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Old Apr 13, 2005
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it wouldn't be hard to convert the lx/dx harness for an ex ecu. all the plugs are the same you would just need to add 3 pins into one plug. an boom done. the hard part is finding the the right pins to fit. but if you go to honda buy their book for $23 its easy to find where to put the 3 pins.
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Old Apr 13, 2005
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dont really need to find the pins.. i heres some info that might help

2001-2003 Honda Civic ECU Wiring
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 VTEC ONLY
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 Coolant sensor
9-blu/blk-VTEC Oil pressure switch VTEC ONLY
10-wht/blu-Alternator L Signal
13-wht/red-Alternator FR Signal
14-blu/red-EGR Valve VTEC ONLY
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)– AUTO TRANSMISSION ONLY
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 EX Only
3-brn/yel-Logic ground
4-pnk-Sensor ground
5-yel/blu-Sensor voltage source
6-blk/wht-Secondary O2 sensor heater control EX Only
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
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Old Apr 18, 2005
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Sweet! I have printed that out already. thanks for all the input I want to do the swap next weekend! I going to be getting the ecu pretty soon, I guess i dont really need it until i finish labor/and ready to flash Ecu. I almost 75K also going to replace water pump and timing belt,along with swap. does anybody know when you should replace timing Belt and if these motors are interfernce motors?
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