Question about 1995 Toyota Tacoma

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No power to fuel pump. Power up to open circuit relay.

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  • Supra_Freak Aug 08, 2008

    There is no power getting to my fuel pump. Even though i have replaced every fuse and relay for the fuel system buut its still not getting any power to it at all. So i dont know if its in the wiring or something came disconnected when i transported it from my friends house to mine. Cause i had it over there to flush the fuel system out cause it was only running on 2 of the 6 cylinders cause the fuel injectors was clogged. What could it be?

  • Anonymous Aug 09, 2008

    I have 1992 toyota pick up 4 cylinder 22re.I am getting no power to the fuel pump at all I have replaced the relays, checked the coil and the distributer and still no power. 


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  • Toyota Master
  • 1,861 Answers

No power to the fuel pump is a common issue with Toyota Trucks. More than likely, the power wire at the top of the fuel tank sending unit is rusted off. If this is the case, you either need to drop the tank, or remove the bed to replace the sending unit assembly. I have done it both ways, but have found that removing the bed is easier than dropping the tank.

Posted on Sep 09, 2008

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1 Answer

1996 Lexus 400 where fuel reset


To answer your question specifically it would be no. There
is no inertia switch that feeds the fuel pump that can be turned off or reset . The engine control computer turns on a series of two different relays to control power to the fuel pump. When in the start position the circuit opening relay and the fuel pump relay or both energize causing the fuel pump to run at full pressure or fast speed. From there the engine control computer determines which demand is on the fuel pump and either turns off the fuel pump relay and leaves
the circuit opening relay on to supply power through a resistor to slow the pump down for less demand. The EFI main relay is the main supply relay to both of these sub relays. The fuel pump is powered up ultimately by the 20 amp EFI number one fuse. All of these components are located in the fuse box under the hood. If the circuit opening relay is not working it's powered up by the 10 amp
ignition fuse inside the vehicle. It's unlikely it is the 10 amp ignition fuse because that powers up a lot of other things also.

May 16, 2015 | 1996 Lexus LS 400

1 Answer

Toyota Tacoma fuel problem


Check the following:
- Listen to the fuel pump noise under the fuel tank.
- Starter signal.
- EFI relay, under the hood fuse and relay box.
- Fuel pump operation and pressure.
- Regulating valve.
- Circuit Opening Relay (COR) under the dash.
- Check for open in harness and connector between circuit opening relay and fuel pump, and fuel pump and body ground

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Hope that works. Thank you for visiting Fixya.

Mar 18, 2014 | 1998 Toyota Tacoma

1 Answer

95 Camry 2.2, no power at fuel pump / relay & fuses are good


The fuel pump relay (circuit opening relay) has 5 wires.
black white is power from a 10amp fuse
black orange is power from the EFI relay
green and red is the signal from the computer
black is ground for the relay
blue black is power out to the pump
Which wire are you saying has no power ?

May 15, 2013 | Cars & Trucks

1 Answer

Engine codes



Trouble Code: P0230

Fuel Pump Circuit Malfunction
Possible Causes:


Fuel pump control circuit is open or shorted to ground Fuel pump relay power circuit from ignition switch is open Fuel pump relay is damaged or has failed PCM has failed

Jun 02, 2012 | Hyundai Motor 2004 Sonata

1 Answer

G16b no spark efi


The fuel pump relay has four pins. Two pins relate to low power switch circuit from the ECU and the other pins relate to the high current switched circuit which has a permanent power in and switched power out (to fuel pump). Check that the ground on the lower switch circuit pins is good and then check that when the ignition key is in the 'on' position that the low power switch pin has 12.6ish volts supplied to it. If there is no low power switching supply then the relay cannot function. If there is low power supply but no voltage switch on the output then the issue sounds like the relay itself. Pull the relay out and check that it clicks when 12v is dropped across the low circuit pins. Check the resistance across the high current output circuit pins when the low pins are given 12 volts. As 12 volts is applied across the low voltage pins the resistance across the high current output pins should drop to near zero as the internal contacts are closed. As the low side voltage is removed the high side pin resistance should once again register open circuit (infinite resistance). If the relay clicks but fails to output then either replace the relay or open it up and get a nail file and draw it between the contact pins to remove any corrosion.

May 23, 2012 | Cars & Trucks

1 Answer

Starter motor went out on 92 5.0 ho replaced it and new battery, now fuel pump does not work I get a 542 code checked fuel pump relay and inertia switch both good fuse good


  • Code 542 indicates one of the following conditions:

Engine Starts:

· Fuel Pump secondary circuit shorted to power

· Fuel pump relay contacts always closed

· Open in fuel pump monitor (FPM) circuit between ECU and connection to POWER TO PUMP circuit

· Heated Exhaust Gas Oxygen (HEGO) sensor shorted to power

· faulty ECU

Engine Does Not Start:

· Open inertia switch or inertia switch circuit

· Open in or between ECU and fuel pump (This includes open in fuel pump brushes/windings)

· faulty ground connection at fuel pump

The easiest way to check this circuit is to go to the fuel pump relay. If the relay clicks when the key is turned to the "RUN" position, then the inertia switch circuit is ok.

The Pink/Black wire starts from the fuel pump relay and goes two directions. One side goes back to the fuel pump. The other side is the fuel pump monitor circuit and goes to pin #8 at the ECU. This wire should only be hot for a second or two when the ignition is turned to the RUN position.

The fuel pump relay receives power on the Black/yellow wire. It comes from a fusible link at the power distribution center. This wire should be hot at all times.

If all the above is working as designed, them you probably have a bad fuel pump.

Feb 13, 2011 | 1992 Ford Thunderbird

1 Answer

My relay won't pass power to the fuel pump


You need to test to see if the relay logic is turning the relay on. If the relay is supposed to be engaged and isn't - then replace the relay. If it is engaged, then trace the power from the relay to the fuel pump to find the open circuit.
note: I had an issue with one of these where the power to the fuel pump was good, but the ground was open on the return side.

Jan 12, 2010 | 2002 Oldsmobile Alero

3 Answers

WHERE WOULD I FIND THE FUEL RELAY OR FUSE FOR 2004 FORD FREESTAR,ANYONE HAVE A DIAGRAHM OF WHERE IT IS.THANKS


The fuel pump relay is in the engine compartment fuse block at location K4/C-1051.

Jan 09, 2010 | 2004 Ford Freestar

1 Answer

I have a 99 tacoma with no power to fuel pump,fuses are good, power to relay and have swapped relays, but I don't have any power to the fuel pump. Is there some type of inertia switch?


Look to see if you have power at pin 1 of the circuit opening relay. The C.O. Relay is what powers the fuel pump. If you have power there (a blue wire), you have an open circuit between the relay and the pump.

Jul 17, 2009 | 1995 Toyota Tacoma

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