Mechanics

NO START PROBLEM

2004 Hyundai Santa Fe

Electrical problem
2004 Hyundai Santa Fe 4 cyl Two Wheel Drive Automatic 72000 miles

My 2004 Hyundai Santa Fe won't start. The relay for the fuel pump isn't getting power but it can be bypassed and the fuel pump starts right up. When I try to start the vehicle after bypassing the relay it still won't start. I have also checked the inertia switch and it hasn't popped up. It has gotten regular fluid changes and has always run like a champ before. I'm stumped as to what it could be.
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Harley19
April 27, 2009.



Could be the computer not grounding the fuel pump relay

Rasmataz
Apr 27, 2009.
How do I check the computer to see if that is it? Or would it be better just to reset the computer? If I do have to reset the computer how do I do that.

Tiny
Harley19
Apr 27, 2009.
Do a continiuty test on the orange and gray wire at the fuel pump relay connector to pin 20 at the computer

Rasmataz
Apr 27, 2009.
Would the relay also cause the spark plugs to not fire? If not what would cause it because they aren't working even if I bypass the relay.

Tiny
Harley19
Apr 27, 2009.
Test the engine control relay it powers the fuel pump relay coil side and also the ignition coils thru ECU fuse 1 20amp

Rasmataz
Apr 27, 2009.
I just got done checking all the fuses and relays and there all good. Is there another component that controls the fuel pump and ignition coils before the fuse box that could of gone bad?

Tiny
Harley19
Apr 28, 2009.
Check and test the engine control relay and ignition failure sensor-

Rasmataz
Apr 28, 2009.
Where is the sensor located?

Tiny
Harley19
Apr 29, 2009.
2.4L engine is on rear of cylinder head


http://www.2carpros.com/forum/automotive_pictures/12900_sensor_1.jpg


Rasmataz
Apr 29, 2009.