🎉 When A Fuel Pump Relay Is Bad

Voltageat pump power terminal must be within .5v of battery power when relay is turned on with amp meter at pin 22. Check power from battery if voltage is low. Check the inertia switch and fuse if battery voltage is missing. Pin 22- (light blue-orange) Grounded to turn "on". Voltage will drop to about 1v when "on". Dependingon year, make, and model, DTC P0231 may have number of causes. Here are some of the most common. Relay - If the fuel pump relay is faulty, no voltage will go to the fuel pump or monitor. Harness Damage - If there is damage to the harness going to the fuel pump, it can cause excessive resistance (corrosion), an open circuit (broken Link to Wells WebsiteDiagnosing a late model vehicle with a Fuel Pump Driver Module can be a real challenge when you are unsure how t Stillwouldn't start. Pulled fuel pump relay and put in a jumper wire to run the fuel pump and it started. Put the fuel pump relay back in and it starts and drives, but the fuel pump still doesn't prime when turning the key on. I'm afraid that after sitting overnight, it will once again refuse to start. Youcan test the fuel pump relay control coil in the following manner: 1. Remove the fuel pump relay from the PDC. 2. Establish the relay pin locations on the PDC relay pin socket recepticles by holding the relay next to the recepticle. Mark pins 85 and 86 on the PDC next to pin sockets 85 and 86 using a pencil (erase when finished). 3. Wiringissues Wiring issues such as loose connections, a short in the line, bad connection, or damage on the wire can disrupt the constant and proper flow of power from the battery to the fuel pump relay. Signs and symptoms of a bad fuel pump relay If the fuel pump relay goes bad, you will notice it immediately. Fusebox diagram (location and assignment of electrical fuses and relays) for Cadillac SRX (, 2012, 2013, 2014, 2015, 2016). Nospark would most commonly be caused by a bad crank sensor, bad main relay or bad engine control unit. Sometimes it can also be key or anti-theft related. No fuel would be caused by a blown fuel pump fuse, clog/blockage/broken line of some kind, or bad fuel pump. Thatthe fuel pump inertia switch is OK (not tripped). That the wiring between the fuel pump and the fuel pump relay is OK. The next step is to make sure that the EEC computer (fuel injection computer) is activating the fuel pump. For this test, go to: TEST 4. CASE 2: Fuel pump came on but the fuel pressure WAS NOT at specification (35-45 PSI HowTo Fix A Bad Fuel Pump Relay. Be sure to check the fuel pump relay fuse before working on the CCRM. There is a chance that the fuse needs to be replaced. Check out the full list of every 1994-2004 fuse panel diagram here. We highly recommend replacing the entire CCRM versus opening it up and replacing the fuel pump fuse. fuelpump relay: fuel pump relay: outlet relay: electric socket relays: headlight lo relay: headlamp relay (low) ig1 relay: ignition relay: front fog light relay: front anti-fog lamp relays: cooling fan relay no.2: cooling fan relay # 2: main relay: main relay: cooling fan relay no. 3: cooling fan relay # 3: drl relay: drl relay: horn relay FuelPump Relay Issues. Another potential cause for bad fuel pump symptoms is a faulty fuel pump relay. This relay controls the power supply to your Beetle's fuel pump, and a faulty relay may lead to: Intermittent power loss to the fuel pump; Inability to start your car; Unpredictable pump operation, leading to stalling or rough running hBj49.

when a fuel pump relay is bad