Fuel pump secondary circuit failure pcm to ground. Error Code P1237: Fuel Pump Secondary Circuit Fault 2019-02-27

fuel pump secondary circuit failure pcm to ground

1993 Ford F150 F150 Fuel Pumps Will Not Engage

fuel pump secondary circuit failure pcm to ground

That means one side of the circuit will always be hot, and the other side will go to ground or below 1 volt as the computer switches on that circuit. Tripped inertia switch — press reset button on the inertia switch. The yellow wire is the fuel tank sender to the fuel quantity gage. No glow and you have a broken wire or bad connection between the test connector and the relay. I usually start at the central connector, if it has one. Verify inertia switch is not tripped or open.

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Error Code P0230: Fuel Pump Primary Circuit Malfunction

fuel pump secondary circuit failure pcm to ground

The challenge you have here is isolating each part of the system. Car starts and runs fine bit it dies intermittently. Checked the inertia switch, not tripped, very low resistance thru it. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. The computer has its own dedicated power ground that comes off the ground pigtail on the battery ground wire. Fraud and falsehood only dread examination.

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P1237 FORD Fuel Pump Secondary Circuit Fault

fuel pump secondary circuit failure pcm to ground

Notice that pin 19 on the computer is the monitor to make sure the pump has power. The control path consists of the inertia switch, the computer, and the fuel pump relay coil. Need help with a P0230 code? The ground for the fuel pump may be larger gauge wire that the fuel tank sender ground wire. Poor terminal retention should be addressed by replacing any spread terminals. No fuel pressure, possible failed items in order of their probability: A. However, this is by no means conclusive. Knowledge based on external evidence is unreliable.

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Not getting power to the fuel pump and the secondary air ...

fuel pump secondary circuit failure pcm to ground

The right to be stupid is inalienable for sure however, there is no such thing as a right to impose stupidity onto others Great Thoughts will Overwhelm a Feeble Mind There is never money to do it right, but there's always money to do it over. Keep in mind that you can have voltage to all the right places, but the computer must provide a ground. Crowds are reactionary and barbaric. Possible Causes Error Code P1237 can be caused by multiple problems. Not to mention you seem to have an intermittent failure on your hands. I will replace the fuel filter tomorrow, however I don't see how that would have generated the 95 code.

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1993 Ford F150 F150 Fuel Pumps Will Not Engage

fuel pump secondary circuit failure pcm to ground

Refer to the thumbnail wiring schematic for terminal identification. I feel like it's a bad wire somewhere mid vehicle but it just doesn't make any sense. As a technician, I have access to communities of technicians where repeat failures are reported. Some Mass Air conversions neglect to run the extra fuel pump wire, and they always have a 95 code. Another common source of excessive resistance is pitting of the secondary contacts of the fuel pump relay. I read an old post of Joels and I am confused: For pin 19.

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fuel pump secondary circuit failure

fuel pump secondary circuit failure pcm to ground

Typically, circuits fail because of excessive resistance. . If it doesn't, the wiring between pin 22 on the computer and the fuel pump relay is bad. If both are good, then the problem could be a case of failed fuel pump. I checked all the relays there all good the fuse box is good it's reading like it should but I still don't have power.

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Fuel Pump Codes 87/95/96 Troubleshooting

fuel pump secondary circuit failure pcm to ground

Took battery cable off to clear all codes. This can be done at the relay connector while you are testing the fuel pump circuit without the relay. I go directly to the pump if I can, but this is often not easy to access without dropping the fuel tank down. Probe computer pin 22 with a safety pin and ground it to chassis. No problems occurred during that week. Make sure that the power is off the circuit before making any resistance checks.

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Not getting power to the fuel pump and the secondary air ...

fuel pump secondary circuit failure pcm to ground

Prior to replacing the computer, check the computer power ground. Refer to in Wiring Systems. If error code P0231 or P0232 are present, follow the pinpoint test for trouble codes first to verify the failure on the secondary side of the fuel pump circuit. The test light should glow brightly. Did you find and correct the condition? To get some idea of what a good reading is, short the two meter leads together and observe the reading. The bottom line is that excessive resistance causes a decrease in current flow.

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Error Code P0230: Fuel Pump Primary Circuit Malfunction

fuel pump secondary circuit failure pcm to ground

Some extra information on fuel pump troublesooting. On 92 and later model cars it is located below the Mass Air Flow meter. If I suspect there is a problem with the power supply to the fuel pump, this is the first thing I do. It should run for 5-20 seconds and shut off. Measured the fuel pressure at the schrader valve, 35 psi, key on, and running and at 3000 rpm. Book says you have short in harness. Even us technicians perform tests on modules at our own risk.

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FPM

fuel pump secondary circuit failure pcm to ground

Using this kit prevents damage to the harness connector terminals. I would suspect both pumps have separete grounding points. My buddy has it in his mind that it's a bad computer but I don't think so that just doesn't make sense please help My car has 130000 miles. Albert Einstein Tuning on a Dyno for the track, is like swim practice in a bathtub. Make sure the computer and everything else is connected. If so, I would suspect a wiring harness is shorting to ground somewhere.

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