Fuel Pump Circuit Opening Relay The fuel pump will not get power with just the key on. the engine needs to be running, and computer needs to see that from crank cam sensor and or spark, then the computer activates the circuit opening relay. The relay acts as a switch, allowing the fuel pump to function when needed and preventing it from running continuously, which could cause the pump to wear out prematurely or waste fuel. the fuel pump relay helps maintain optimal fuel pressure and flow in the fuel system, ensuring that the engine has a constant supply of fuel for proper combustion.
Fuel Pump Circuit Opening Relay The problem is documented in this thread. the relay is located on the drivers left kick panel. pic of circuit opening relay location, camera is at the brake pedal facing left side of the vehicle unfortunately a new relay from toyota (part # 85910 30050) is $120, and whatever off brand relay rockauto offers is still $70. The relay can fail for many reasons, from dust to electrical power surges; anything can affect the well being of a fuel pump relay. here is a more detailed list of the signs of a bad or failing fuel pump relay to look for: 1. check engine light on the engine control module monitors all engine sensors to ensure they do not show the wrong values. Do you notice in your vehicle that the fuel pump runs continuously with key on? and looking for solutions to fix it, then this article is for you. If the engine is stalling or not starting, or the fuel pump is not making any noise when the key is on, you may need to replace the fuel pump relay.
Fuel Pump Circuit Opening Relay Testing Yotatech Forums Do you notice in your vehicle that the fuel pump runs continuously with key on? and looking for solutions to fix it, then this article is for you. If the engine is stalling or not starting, or the fuel pump is not making any noise when the key is on, you may need to replace the fuel pump relay. Get a detailed toyota circuit opening relay diagram to troubleshoot and understand the wiring and connections of the relay in your toyota vehicle. find information on how the circuit opening relay works and how it can affect the fuel system in your toyota. Toyota has a device called the circuit opening relay. essentially 2 relays in one case, one energized during the start sequence, one during the run operation, that runs the fuel pump, as long s the engine is running. if the engine stops, like during an accident, it will immediately shut the fuel pump off. it prevents the fuel pump from dumping fuel out of a broken open fuel system during a.
Fuel Pump Shut Off Relay Tech Talk Oldschool Co Nz Get a detailed toyota circuit opening relay diagram to troubleshoot and understand the wiring and connections of the relay in your toyota vehicle. find information on how the circuit opening relay works and how it can affect the fuel system in your toyota. Toyota has a device called the circuit opening relay. essentially 2 relays in one case, one energized during the start sequence, one during the run operation, that runs the fuel pump, as long s the engine is running. if the engine stops, like during an accident, it will immediately shut the fuel pump off. it prevents the fuel pump from dumping fuel out of a broken open fuel system during a.