How to check for a faulty fuel pump?
THIS WILL POWER THE PUMP TO RUN AND CHECK FOR A FAULTY FUEL PUMP. 3. NEXT, CHECK FOR FUEL PUMP SIGNAL AT THE FUEL SYSTEM CONTROL MODULE. 4. FIND THE DARK GREEN/WHITE WIRE IN PIN13. WITH A TEST LIGHT CONNECTED TO THAT WIRE, TURN THE KEY TO THE RUN POSITION.
What is the name of the fuel pump driver module?
The fuel pump drive — or driver — module is usually referred to by the acronym FPDM. Aftermarket retailers sometimes call the same component a fuel solenoid driver, or FSD. By either name, the module controls the voltage delivered to a vehicle’s fuel pump.
Where do I find the fuel pump test light?
FIND THE DARK GREEN/WHITE WIRE IN PIN13. WITH A TEST LIGHT CONNECTED TO THAT WIRE, TURN THE KEY TO THE RUN POSITION. IF THE POWERTRAIN CONTROL MODULE IS SENDING THE SIGNAL TO COMMAND THE FUEL PUMP ON, THEN THE TEST LIGHT WILL BE ILLUMINATED. Check for one of the following three conditions. 1. Constant 12v Power 2. Power only when cranking 3.
When is the best time to test a fuel pump?
You need to disconnect the vacuum line from this FPR and check if the vacuum has any trace of fuel. If it’s okay, it should be completely dry. It would be best if you check this when the engine is idle.
What should I do if my fuel pump is not working?
If the pump doesn’t deliver fuel, you may be dealing with a clogged, restricted fuel line, fuel pump electrical circuit problem or failed pump. If the engine dies within minutes of driving and it won’t start until the engine cools down, do the next test as soon as the engine dies: Open the hood and pull out a spark plug wire.
How to test the fuel pump in a car?
FUEL PUMP TEST 1: Spraying Start Fluid Into The Throttle Body. FUEL PUMP TEST 2: Using A Fuel Pressure Gauge. Location Of The Schrader Valve. Checking The Fuel Pump Inertia Switch.
What is the purpose of a fuel pump driver module?
By either name, the module controls the voltage delivered to a vehicle’s fuel pump. By controlling the voltage, the fuel-pump driver module maintains the optimum fuel pressure and fuel delivery to the engine throughout its full operating range.
How is circuit 3 connected to the fuel pump?
Circuit 3 is the one that runs to the fuel pump (via the Inertia Switch) and delivers the voltage/current it needs to activate. Before this voltage reaches the fuel pump, it has to go through the fuel pump Inertia Switch first. If the Inertia Switch has been tripped, it will ‘open’ the circuit and the voltage will not reach the fuel pump.
What is the bad fuel system control module code?
IF YOU CHECK YOUR VEHICLE WITH A SCAN TOOL, THE MOST COMMON BAD FUEL SYSTEM CONTROL MODULE ERROR CODE IS P069E. (FUEL SYSTEM CONTROL MODULE REQUEST MIL ILLUMINATION) If playback doesn’t begin shortly, try restarting your device.
Why is the fuel pump and relay not working?
The ignition circuit, which includes the ignition switch, controls power to many components, including the fuel pump and relay. If there is an issue with the switch or the circuit, perhaps a wiring problem, then power to the fuel system may be cut off.
Where can I find the fuel pump code?
The codes may either be directly related to the fuel pump or make reference to an air/fuel ratio problem. A scan tool or a simple code reader can be used to retrieve the information. Many auto parts stores will pull codes for free. Plus, there are inexpensive code reading tools and apps for your smartphone.
How to find out if your fuel pump is bad?
1 Relieve the fuel system pressure (check your repair manual for the best procedure for your model). Usually, you can… 2 Connect the fuel pressure gauge. 3 Start the engine and let it idle. 4 Read the system pressure and compare it to the specification in your repair manual. More
Where to use a fuel system check valve?
FUELAB experiences many customer phone calls that suggest people want to put the check valve prior to the fuel pump. Not so, according to their information. Although that configuration will hold the pressure to the fuel rail, it will cause an unneeded restriction prior to the fuel pump.
What to do if your fuel pump relay is faulty?
If you need to bypass it for testing, use a fused jumper wire from fuse F46 to the fuel pump power terminal. If it works the fuel pump and voltage holds steady, the relay is faulty. You can check the high pressure system on turbocharged models using a MINI scan tool.