Question about 2002 Chevrolet Suburban

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How can you check fuel pump relay - 2002 Chevrolet Suburban

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Relays can be tested to some extent, but it's never definitive. Better to swap in a known good one. Likely, another relay near the pump relay would have the same part number.

Posted on Nov 06, 2012

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Posted on Jan 02, 2017

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1 Answer

Fuel pump relay clicking. Fuel pump was changed 5 mouths ago.


Does vehicle start an run ? amp draw test the fuel pump , relay bad . Most vehicles the PCM controls the fuel pump relay . Just because relay is clicking does not mean fuel pump has a problem . Auto Repair How to Check Fuel Pump Relay Fuel Pump Electrical Circuits Description and Operation

Mar 16, 2016 | Cars & Trucks

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No fuel pressure in efi system


Either the fuel pump is not working, or the filter is totally blocked.
The fuel pump circuit needs checked to see if it's a wiring problem or a failed fuel pump. There will be (probably) a fuel pump fuse in your fuse block, and a fuel pump relay under the hood.
If you check the fuel pump wire for power at the gas tank connector while the engine is cranking over, and there is power there, and the ground for the pump is good, then the pump is not working and will have to be replaced. If you do not have power when cranking, the wiring at the fuel pump relay will have to be checked. Simple relay- has a power feed for the pump at one relay terminal (it is hot at all times), and a fuel pump wire to pump on another terminal (the power out for relay). When relay coil side is energized from a signal from computer, the relay contacts close and power is sent to the pump. The other relay terminal is a ground for the coil side of relay. Pull the relay out and you will see the diagram etched on it. If there is a fifth terminal, that could be a pump prime terminal, or a way to keep the pump running when engine is running through the oil pressure switch. But when cranking the engine, the computer will signal the relay to send power to the pump.

Dec 31, 2013 | Cars & Trucks

1 Answer

No power to the fuel pump have checked all fuses


There are 2 relays that control your fuel pump. 1 is a fuel pump relay and the other is a Auto shut down relay or ASD relay.

Nov 03, 2013 | 2005 Dodge Durango

1 Answer

Fuel pump removale


Hi there,

Note: as your vehicle is 2009, it may still be covered under Manufacturer's Warranty. If still covered, you should have them replace at no charge.

Firstly, unless you have read your codes from your vehicle's computer and confirmed your fuel pump is actually faulty (ie Code P0203), you should should check your diagnostics first - as other electrical components could contribute to the fuel pump not working.

Start by inspecting the following circuit components:


FUEL PUMP RELAY INSPECTION


1. REMOVE RELAY BOX COVER
2. REMOVE FUEL PUMP RELAY (Marked: F/PUMP)


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3. INSPECT FUEL PUMP RELAY CONTINUITY


(a) Using an ohmmeter, check that there is a continuity between terminal 1 and 2. If there is "NO" continuity, replace the relay.


(b) Check that there is no continuity between terminals 3 and 5. If there "IS" continuity, replace the relay.


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4. INSPECT FUEL PUMP RELAY OPERATION


(a) Apply the battery positive voltage across terminals 1 and 2.


(b) Using an ohmmeter, check that there is a continuity between terminals 3 and 5.
If there is "NO" continuity, replace the relay.

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5. REINSTALL FUEL PUMP RELAY
6. REINSTALL RELAY BOX COVER


FUEL PUMP RESISTOR

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INSPECTION


1. REMOVE FUEL PUMP RESISTOR
2. INSPECT FUEL PUMP RESISTOR

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Using an ohmmeter, measure the resistance between the terminals.


Resistance: 0.70 - 0.76 W at 20°C (68°F). If the resistance is not as specified, replace the resistor.

3. REINSTALL FUEL PUMP RESISTOR

If all the above components prove satisfactory, then proceed with fuel pump removal.

Access to the fuel pump & sender unit is via a service hole. The service hole is located under the No.1 Rear Seat (through the floor), so you will need to lift the rear seat & carpet, then remove the service cover.


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Cheers,



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Jun 11, 2011 | 2009 Toyota Land Cruiser

1 Answer

Drove to the store last night had no indications of any problems. Got in it this morning and it cranks over good but will not start? Here's things I have already checked/tested - fuses( coil,ignition, fuel...


If you turn the key from off to run ( do not start ) does the theft light go out ?
How did you check the fuel pump relay ? My 2001 at ~ 35K miles the fuel pump relay went out, I checked it by swapping the trailer tow adapter reverse lamp relay into the place of the fuel pump relay.
The thing I am drawing a blank on, and you seem to confirm what I think, is the fuel pump relay is removable in the '02. Must be the '03 when the fuel pump relay became integrated into the fuel panel ( non serviceable ).

If you jumper the fuel pump relay, does it turn on ( red line in picture below )
sscullys_122.jpg

Feb 27, 2011 | 2002 Ford F150 Regular Cab

3 Answers

Truck will not start, has fire. relay ok. no trouble codes.


when you turn the key in 'on' position, do you hear the fuel pump hum? check under hood in black box,,fuses,,and relays. for bad fuse or fuel pump relay bad. try bumping fuel tank with something hard to see if fuel pump will engauge with key on. maybe bad pump. have you had off road? look for pulled plug from fuel pump underneath near gas tank.have you bent or damaged your igbition key somehow? the key sends a signal to your cars computer to engauge the pump and crankshaft sensor.but if you do have fire,,,it's a fuel problem, so you are on the right track. if nothing i've said helps, check for a bad fuel pressure regulator.hope this helps and thank you for choosing fixya.com!!

Nov 19, 2010 | 2001 Dodge Durango

2 Answers

1995 dakota fuel pump relay. If the relay is bad,


If fuel pump relay is bad yes it will still get spark.
Sonds like you do have a fuel pump, or fuel pump relay problem, most likely the pump.

Oct 11, 2010 | 1995 Dodge Dakota

1 Answer

1997 Ford F150 Electric Fuel Pump will npt pump


Did you check the fuel inertia switch in the passenger side kick panel ?

The fuel pump is powered :
the fuse to the fuel pump relay.
The fuel pump relay to the fuel inertia switch
The fuel inertia switch to the fuel pump itself.

At the fuel inertia switch in the kick panel, power from the relay is the Dark Green w/ Yellow stripe wire and the pink w/ black stripe wire is the power. from the fuel inertia switch to the fuel pump.

If you jumper the fuel pump relay, you should hear it run. If not pull the fuel pump relay, and check the pins in the relay socket, pin 30 should be the power from the fuse.

50b0c31.jpg

If you have power at pin #30, jumper the relay socket as shown with the red line above, and check the dark green w/ yellow stripe wire at the fuel inertia switch for power.
Press the button on the top of the fuel inertia switch, and check for power leaving the fuel inertia switch on the pink w/ black stripe wire.

This is tests good, check for power at the fuel pump, same pink w/ black stripe wire.
Fuel inertia switch info is in the owners manual, If you did not get an owners manual with your truck ( purchased used ), you can download one from Ford :
https://www.fleet.ford.com/maintenance/owners_manuals/default.asp

Jan 03, 2010 | 1997 Ford F150 Regular Cab

6 Answers

No power to fuel pump


when u checked this u do realize the fuel pump only has 12 volts for 1 second then the computer turns it off unless the engine is started? let me know.

Dec 03, 2009 | 1997 Dodge Ram 1500 Club Cab

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