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Discussion Starter · #1 ·
i have a 99 civic ex with the y8 of course, but its an a/t wah wah.. my problem is, my iacv was not working period (new iacv, and ran new wires from ecu) the car ran for a bit until someone stepped on the ecu while it was on the floor and broke the second ground from the d plug. after that, no start, and the scanner cannot connect to the ecu. i figured i fried it so i got a new one, put it in and still no start, and cannot connect to ecu. i am officially lost
 

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D plug is only part of the automatic transmission stuff. What does the car do when you turn the key to on? Does it prime and turn over but no fire?
 

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Sounds to me like you either have no power or ground. B1 & b9 are power. B2,b10,b20 and b22 and the thermostat are grounds.
 

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Does the light even work?

Do you have power and ground at the DLC?

Just having the MAP sensor unplugged wont automatically set a MIL
 

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Are you trying to start the car after unplugging things? The MIL wont set right away all the time, some times you have to start the car for it to set
 

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the light works. ive unplugged a couple things to try to send a cel and it doesnt connect at all for some reason... should i just say f it and get another harness??
I'm not sure how badly they 'stomped' on the ecu but do you hear the fuel pump priming when you try to crank the car? Did you check for power at the B plug by using the obd2b ecu pinout? Have you check the fuses in the engine bay fusebox?
 
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