Question about 2004 Kia Sedona

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@aol.comI have a 2004 kia sedona,slid of the road and went in ditch. viechicle was still running but stalled while being toed out of ditch. It will not restart. Everything else electrically seems to work except fuel pump will not come on, even when i hot wire pump with it running it still wont start. According to wiring diagram W it shows a inhibitor switch. Does the viechicle have one and where is it located? It also shows immobilizer system. does this have somrthing to do with it? when i hot wire the pump to the relay socket with relay out to the terminals 30 and 86 with the key off I get a clicking noise out of circuit plug wich seems to go to power train module. With the key on i get a buzzing noise, I dont know where from and it seems to only last for 3 or 4 seconds. appears something electrically telling pump not to come on. I have power to that plug. Fuel guage works wich is on same circuit, also 2 other plugs on top of the fuel tank,(the 3 prong and the 2 prong) dont have power. What are they for? I dont know what else to do to get it to start. Thanks, Jeff

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  • jodyc1 Dec 29, 2010

    wher is the collision shut off switch for the fuel pump/ viehicle?

  • jodyc1 Dec 29, 2010

    Where is the collision shut off switch for the fuel pump/viechicle? Are you positive on the plugs on the tank? The 2 prong has no power to the plug even when using power pack, unit does not run? The 3 prong has a vent tube on unit, no power to plug? the 4 prong runs the gas guage, it has power to the green/white wire, but no power to green wire. When i hot wire the green wire the pump seems to run, or is that the sending unit i hear?

    Thanks, Jeff

  • jodyc1 Dec 29, 2010

    I have a 2004 kia sedona, slid of the road and went in ditch. vehicle was still running but stalled while being toed out of ditch. It will not restart. Everything else electrically seems to work except fuel pump will not come on, even when I hot wire pump with it running it still wont start. when I hot wire the pump to the relay socket with relay out to the terminals 30 and 86 with the key off I get a clicking noise out of circuit plug which seems to go to power train module. With the key on I get a buzzing noise, I don?t know where from and it seems to only last for 3 or 4 seconds. appears something electrically telling pump not to come on. I have power to that plug. Fuel gauge works which is on same circuit, also 2 other plugs on top of the fuel tank,(the 3 prong and the 2 prong) don?t have power. What are they for? The 2 prong has no power to plug even when using power pack, unit does not run? The 3 prong has vent tube on unit, has no power? The 4 prong runs the gas gauge, has power to green/white wire. No power to the green wire, when I hot wire the green wire the pump seems to run or is that the sending unit I hear?

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  • Master
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Hi Jeff

To save time messing about I would first try these 2 things,

1. disconnect the car battery, preferably over night, then reconnect positve first then negative, this can often reset the cars computer and in most cases works. An immobiliser fault can be fixed in this way.

Secondly check the fuel pump relay, if the pump is making no noise then most likely that this is to blame or the fuel cut off switch. Try the relay and the battery disconnection first, get back to me if it is still the same, I am looking for the scematics for the fuel switch now.

Regards

Dan

Posted on Dec 30, 2010

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3 prong is the tank pressure sensor, 2 prong is fuel temp sensor.
"Inhibitor" switch is just a fancy name for the range switch. Tells the PCM that the transmission is out of gear.
If I'm not mistaken the fuel pump relay coil is hot in "run" and "start" (powered by "eng" 10A fuse) and is activated by the PCM earthing one leg of the pull-in coil. Verify by testing at the relay socket with a digital voltmeter on pins 85 and 86.
Fuel pump pressure should be 46-49 psi.
Check that the underbody fuel lines have not been damaged or pinched and verify that you have fuel at the fuel rail itself. Perhaps try starting by squirting some fuel into the inlet, "upstream" of the filter. If the engine fires even just once, double check your fuel supply.
As an afterthought, have you checked for spark? The fuel system is only primed by the PCM and then shut off if the engine is not running.

Posted on Dec 29, 2010

  • Rene Rossouw
    Rene Rossouw Dec 29, 2010

    Refer to the following diagram:




    Perform the following tests.
    Remove the fuel relay. Measure voltage at all pin connectors with ignition off. You should find 12V at the supply for the fuel pump. This supply is switched to the pump by the relay. If you do not find power on any pin then check the 15A fuel fuse in the engine compartment fuse box(directly above the fuse puller).
    Switch the ignition to run. You should now have power at the same point previously found and also at the hot side of the relay coil. If not check the 10A "Engine" fuse number 24 in the passenger compartment fuse box.
    Do not bridge any connections in the relay connector unless you are certain which wire is which. The green that goes to the PCM may cause damage to the PCM if you should connect 12V to it!!
    As you can see the fuel pump has a 4 wire connector with wire colors as indicated on the diagram.
    The fuel guage does not run on the same circuit(only shares a small portion of the earthing at the tank as shown).
    The 3-wire connector belongs to the tank pressure sensor and the 2-wire connector to the fuel temp sensor. These 2 units have nothing to do with the operation of the fuel pump. They are there to assist with EVAP and emission control.
    Hotwire the green from the fuel pump to battery positive and verify that you have fuel flowing at the fuel rail on the engine by disconnecting the fuel supply at the engine. Capture any spilled fuel in a bottle and take care not to spill any on the motor as this is an extreme fire hazard. Check the fuel pressure by connecting a fuel pressure guage and attempting to restart. Pressure should be 46-49psi as stated earlier.


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  • Kia Master
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The fuel pump is in the gas tank. The two prong connector is for that, the three prong one is the fuel guage. They do have a collision shut off switch and everything that you want to know about the vehicle is here : http://www.kiatechinfo.com/default.asp

Posted on Dec 29, 2010

  • Brad Brown Dec 30, 2010

    There is a pressure sensor and a temp sensor in the tank, You will not hear the sender in the tank, only the pump. The pump shuts off if no ignition happens in 30 seconds. There is a 15 amp fuse for the fuel pump relay The other connection goes to the ECM.

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