Q: my daughter has a 2004 Toyota Highlander. the car wont start so i think it's the fuel pump since i can't hear it run. so once i ge

asked by on

my daughter has a 2004 Toyota Highlander. the car wont start so i think it's the fuel pump since i can't hear it run. i took it out and checked the pump by directly hooking it up to my battery in the truck and it came on. i crossed the Horn relay and the EFI relay to see if it was a bad relay but still didn't make the pump come on. what else could there be to keep the pump from coming on?
My car has an automatic transmission.

Check the fuse. There could be more than one relay in the circuit, for example a circuit opening relay as well as an EFI relay. The fault could be due to high resistance in the circuit (even at the relay contacts) and so the only way to track down something like this is to power the circuit and check for voltage drop at EVERY segment of the circuit. Measuring segment by segment, you are either going to find an open or a voltage drop that is large enough that the pump won’t start. If you want these steps performed by a certified Mechanic, dispatched by YourMechanic right to your location, please request an electrical diagnostic and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. my daughter has a 2004 Toyota Highlander. the car wont start so i think it's the fuel pump since i can't hear it run. so once i ge

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Parking lights not working.

Power would need to be checked at the bulb connectors to verify the switch and fuse is working something any certified mechanic could do, if there is no power I would check the fuse, if there is power its most...

Q: Can a new rack and pinion be damaged while getting it aligned the tech did not remove the boots and know it leaks

Hi Luis. Thanks for contacting us today. Unfortunately, this is a question we simply can't answer, as we don't know the policies of the company that completed the alignment or the specifics about the rack and pinion you either installed...

Q: Oil is green in color.

Hi there. Diesel fuel has a green tint to it. It is possible that the fuel has gotten into the oil, but most likely the diesel will just thin out the oil. If the oil if light bright green in...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.