The ECM1 fuse blowing usually indicates that the fuel pump wires shorted inside the tank. If you drop the tank and remove the module, you will probably find the insulation burned off the gray pump wire.
ECU "electronics control unit" is engine management systems, the car brain or computer that make the car tick and run. Its control everything. Its not good to hear that the fuse to ECU keep blowing out; its telling me you got a short somewhere and this is the first time I heard ECU fuses blow out so many time and it not burning the unit out. If you fry ECU unit it will cost big bucks to replace them; good thing its blowing out the fuse first. Since it keep blowing the fuses, DO NOT PUT OR USE A HIGHER AMP FUSE to keep it from blowing. Have somone went behind the dash and replace or installed new after market radio? Check to see if you have a loose wires hanging underneath the dash. If you cant see anything obvious than Check the relay under the hood, under Engine & Ignition sys. to see if it sticking, go to a junk yard and yank out couple of those relays and have it replace, will cause you 5-10 bucks. If all else fail, take it to Hyundai dealer and have do engine diagnostic and see if it will spit out any code and they can narrow it down. It worth spending 65-70 bucks have it check out than spend 300-500 bucks replacing the new ECU.
1,663 views
Usually answered in minutes!
Just remembered one additional point of interest on this jem.... prior to discovering that the ECU 1 Fuse was blowing the error code came up as a idle control valve so I tried to replace it. No luck but discover that when the throttle control valve was unplugged the car would rev above 2500 rpm like it was supposed to. If I replace the fuse and unplug the idle control valve can this create problems for me? For what ever reason the car seemed to get hot when the valve was unplugged but maybe it was because the fuse was blown also?
Also anyone know why there are three ECU fuses?
×