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A fuel pump relay is just that,a relay that runs the electric fuel pump on your vehicle. PCM stands for powertrain contol module,it is the center for contoling the proper operation of fuel delivery,engine timing etc. The fuel pump relay and pcm relay are not the same.
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What are the relevant inputs to the PCM module for the fuel pump relay feed output?
When the ignition is place in the momentary start position, a signal is sent to the PCM and in turn it turns the fuel pump relay on.
What does ecc mean relay for fuel pump?
The power is supplied by the EEC relay, which supplies power to the fuel pump relay. The PCM provides the grounds for each of them. PCM gives ground to the EEC relay anytime the key is on, and to the fuel pump relay for about two seconds when the key is turned on, and then constantly if it sees a RPM signal.
Where is the pcm fuel pump relay located in a 2004 Ford Ranger?
On a 2004 Ford Ranger ( for the 3.0 and 4.0 liter V6 engines ) In the power distribution box ( which is " live " ) in the engine compartment ( # 47 is the PCM relay ) ( # 48A is the fuel pump relay )
After replacing the fuel pump relay oil pressure sending unit and distributor how can you tell if the ECM on your 1988 suburban is preventing the fuel pump relay from turning the fuel pump on?
I am tackling the same thing on a 1994 Ford Arerostar van. I think that the wire from the fuel pump relay is also connected to the Powertrain Control Module. ( The book makes mention that that the PCM controls the fuel pump! ) If this is true then the PCM may place a "LOW" on that line if it wants the pump off, preventing the relay to pass the voltage to the initeria switch and then the pump??? ( I'll let you know...you let me know? )
Does the computer control the voltage to the fuel pump on 1997 S10?
The PCM (Powertrain Control Module) controls the ground to the fuel pump relay.
How do you check the fuel pump on a Dodge Dakota?
There is a relay that runs the fuel pump, but befor you start probing around in there UNPLUG the PCM, (engine Computer), then loosen a fuel line and apply power to the relay and see if you get fuel. >>>> CAUTION
Does a 93 dodge colt have a fuel pump relay switch?
Yes it does. should be locaed behind radio Usually one bolt to take out looks like a metal casing. The fuel pump relay is a all in one relay. fuel pump, ignition, pcm all in one.
Why isn't there any voltage going to the fuel pump on a silverado?
AnswerBlown fuse or bad fuel pump relay The above answer could be right but not always. I have the same problem now on a 2002 Silverado. I changed the fuel pump, filter, checked the fuses and the fuel relay but still no power to the pump. I then jumped a wire from the #30 to the #87 in the area where the fuel relay came out. The pump will work then. But putting back in the relay, then another one like it, to make sure, the pump still will not work. I checked the power at the #9 on the RED plug going to the PCM. There was power there, but when I checked the wire coming out of the PCM with a test light, there was no power there when I turned on the key. I knew the PCM must be bad. Sooooooooo, I ordered a PCM, had it programmed to my vin# and installed it. Still no power to the pump. I have eliminated everything except the fuel pressure regulator under the upper intake. That can regulate whether the pump gets power or not. Even when I wired the pump direct with the jumper wire from the #30 to #87 under the relay, the pump works however, I think the fuel is being returned to the tank instead of going to the injectors.I don't think yours will be as bad as my situation, but just wanted you to know what other things can cause the loss of power to the fuel pump.The PCM controls the ground to the fuel pump relay.
Where is the fuel pump relay located on a 1996 Ford Escort?
fuel pump relay located in center r side of gear shift consul ,front under center OS dash next to pcm.
Where is the fuel pump inertia switch on a 1993 Dodge Dynasty?
Dodge doesn't use an inertia switch. It controls the fuel pump via a pcm actuated relay.
Where are fuel pump relay and power relay located on a 1991 Ford Ltd Crown Victoria?
The 1991 crown Victoria has several relays group in a relay center loacated under the hood near the master brake cylinder. In this relay center its the air conditioning WOT cutout relay, fuel pump, PCM power relay, and PCM power diode. P.S. defective relays must be replace as a unit.
Where is the shut off valve on a 2000 Mazda 626?
If you're looking for a fuel pump inertia switch, the Mazda 626 does not have an inertia switch like the fords use. The only parts that control the fuel pump are the pcm, fuel pump relay, and the fuel pump fuse.
