Faulty ECU??

[613lx]

How would i check for a faulty ECU. also what are all the voltage specs for the wires powering the ECU.
thx

[93accordexcoupe]

whats ur car doing that makes u think its bad?

[williamsvt]

whats ur car doing that makes u think its bad?

yeah, exactly...i mean i've heard of fried ECUs i guess, but i duno, whats the problem that your experiencing exactly. I know travis had problems with his TCU, and he couldn't shift out of park and etc.

[Accord R33]

usually you get a solid CEL when you try to pull a code...

its not ALWAYS the case though

[613lx]

i get nothing... not even the check engine light when i turn the key.. car wont start..

[Accord R33]

i get nothing... not even the check engine light when i turn the key.. car wont start..

you dont get ANY lights? thats definitly not an ECU issue...thats more of a battery type issue

[613lx]

no no... battery is good.. i get hand brake light and oil pressure light , but no check engine or battery light goes on.. i just swapped a whole new harness in because the old one was burnt to shit.. im just wondering where the main ECU connections are and what are the voltages so i can check them all out. its the last problem i have thats keepin me from runnin the car.

thx

[xfactortype1]

im running out of ideas also..lol

does anyone think a bad eld system would prevent this? i know it would normally trip a code 20, but could it prevent the ecu from working?

just an idea..

hope you figure it out

goo luck tom

[613lx]

im still lost... a bad ecu would still make a solid light wouldnt it...

[613lx]

dunno if this is right but theres 4 wires that power the ecu? and the colors are yellow / white and green / white... i have power to 3 of them .. maybe im cut somewhere down the line... if anyone knows all the power supplies maybe i can hook them directly to a fused power source to see if thats where my problem is... fuk i wanna drive this new cb7 coupppe

[xfactortype1]

no no... battery is good.. i get hand brake light and oil pressure light , but no check engine or battery light goes on..

the battery light is for the charging system, and the check engine light in instrument cluster is pin a13 in ecu.

just a question?
1)- when you say your car wont start..will it crank and not fire, or just not crank or anything? maybe try to crank it if it will to possibly trip an CEL as accord r33 mentioned.

good luck tomd

[613lx]

car cranks , sparks and has fuel in the rail.

thx

[93accordexcoupe]

check ur main coil, plugs, wires, fuel filter can sometimes do that too.

[xfactortype1]

does the engine crank slow or fast? maybe fpr

check ur main coil, plugs, wires, fuel filter can sometimes do that too.

great suggestion also.

good luck tom d

[v4lu3s]

if you jsut swapped teh chassis harness and now it has problems iw ould guess tha tyou got stuff plugged in wrong most likely, or burnt fuses possibly.