Where is the fuel pump relay on a Jeep Liberty?
STANDARD PROCEDURE – FUEL SYSTEM PRESSURE RELEASE Use following procedure if the fuel injector rail is, or is not equipped with a fuel pressure test port. (1) Remove fuel fill cap. (2) Remove fuel pump relay from Power Distribu- tion Center (PDC). For location of relay, refer to label on underside of PDC cover.
What is the check valve on a Jeep Liberty?
Check Valve Operation: The electric fuel pump outlet contains a one-way check valve to prevent fuel flow back into the tank and to maintain fuel supply line pressure (engine warm) when pump is not oper- ational. It is also used to keep the fuel supply line full of gasoline when pump is not operational.
Where is the fuel tank located on a Jeep Liberty?
OPERATION Fuel is picked up in the fuel tank by the fuel pump module. This module is located on the bottom of the fuel tank. A fuel return system is provided within the fuel pump module using check valves. A separate fuel return line from the engine to the tank is not used. The fuel pressure regulator and the main fuel filter are not combined.
How to test for fuel leak in Jeep Liberty?
DIAGNOSIS AND TESTING – FUEL PRESSURE LEAK DOWN TEST Use this test in conjunction with the Fuel Pump Pressure Test and Fuel Pump Capacity Test.
STANDARD PROCEDURE – FUEL SYSTEM PRESSURE RELEASE Use following procedure if the fuel injector rail is, or is not equipped with a fuel pressure test port. (1) Remove fuel fill cap. (2) Remove fuel pump relay from Power Distribu- tion Center (PDC). For location of relay, refer to label on underside of PDC cover.
How do I reset the fuel pump shut off switch?
Push the button on the inertial switch; it should be clearly marked as the fuel pump reset, and may be in a contrasting color to the case. You may need to turn the ignition key to the on or accessory position to energize the module and reset the switch. Proceed to the next step if your inertia switch doesn’t use an external button.
Check Valve Operation: The electric fuel pump outlet contains a one-way check valve to prevent fuel flow back into the tank and to maintain fuel supply line pressure (engine warm) when pump is not oper- ational. It is also used to keep the fuel supply line full of gasoline when pump is not operational.
OPERATION Fuel is picked up in the fuel tank by the fuel pump module. This module is located on the bottom of the fuel tank. A fuel return system is provided within the fuel pump module using check valves. A separate fuel return line from the engine to the tank is not used. The fuel pressure regulator and the main fuel filter are not combined.
What causes bad fuel pressure in Jeep Liberty?
Negative results from one or more tests may not necessarily indicate a bad pump. However, a close inspection will help you isolate a possible problem like fuel leaks on the lines and near the pump, bad line connections or an obstructed pump strainer inside the fuel tank.
What happens if the fuel pump fails in a jeep?
If the fuel pressure sensor does not detect enough fuel pressure in the injector fuel rail, it WILL immediately shut the engine off. Doesn’t matter if due to a failed fuel pump, a busted injector, a big hole in the high pressure fuel circuit, whatever.
What causes a fuel leak in a Jeep Liberty?
If pressure now holds at or above 30 psi, a leak may be found at a fuel tube/line. If no leaks are found at fuel tubes or lines, one of the check valves in either the electric fuel pump, fuel fil- ter or fuel pressure regulator may be leaking.
What should the fuel pressure be on a Jeep Liberty?
Normal operating pressure should be 339 kPa +/–34 kPa (49.2 psi +/–5 psi). (7) Shut engine off. Fig. 2 CONNECTING ADAPTER TOOL—TYPICAL 1 – VEHICLE FUEL LINE 2 – TEST PORT “T” 3 – SPECIAL TOOL 6923, 6631, 6541 OR 6539 4 – FUEL PRESSURE TEST GAUGE 5 – FUEL LINE CONNECTION AT RAIL 6 – FUEL RAIL KJ FUEL DELIVERY 14 – 3 FUEL DELIVERY (Continued) 4.
Where are the fuses on a Jeep Liberty?
Jeep Liberty (2004) – fuse box diagram Year of production: 2004 Interior Fuses The fuse panel is on the left side of the instrument panel. Cavity Ampere rating [A] Description 1 15 Horn Relay, Power Sunroof Relay, Power Window Relay 2 10 Rear Fog Lights (Export Only) 3 20 Cigar Lighter 4 10 Headlight Low Beam Right …
How many relays are in a Jeep Liberty?
Engine Compartment Fuse Box Diagram № A Protected Component 1 40 Blower Motor Relay 2 30 Radiator Fan (High Speed) Relay, Radiato 2 40 Radiator Fan (High Speed) Relay, Radiato 3 50 Park Lamp Relay, Daytime Running Lamp, H
How to test and replace a fuel pump relay?
How to test and replace a fuel pump relay. The principles shown here apply to most vehicles. However, it’s best to check with your vehicle’s repair manual for testing parameters.This specific vehicle is a ’97 Nissan Maxima. — Choosing the best oil filter: Wix XP / Amsoil / Royal Purple..
Where is the fuel pump relay located on a car?
The fuel pump relay is an electronic component that is found on virtually all vehicles equipped with an internal combustion engine. It is often found in the fuse box located in the engine bay and functions as the primary electronic switch that controls power to the fuel pump. The fuel pump relay is usually controlled by…
Jeep Liberty (2004) – fuse box diagram Year of production: 2004 Interior Fuses The fuse panel is on the left side of the instrument panel. Cavity Ampere rating [A] Description 1 15 Horn Relay, Power Sunroof Relay, Power Window Relay 2 10 Rear Fog Lights (Export Only) 3 20 Cigar Lighter 4 10 Headlight Low Beam Right …
What is the average rating of a fuel pump relay?
Average rating from 198 customers who received a Car is stalling Inspection. The fuel pump relay is an electronic component that is found on virtually all vehicles equipped with an internal combustion engine.
Where is the fuel pump shut off switch located?
On Ford, Peugeot, VW, Citroen, Vauxhall, Subaru, Renault, Toyota and Mazda, inertia switch location is usually on one of the following two hidden places: Behind or below glove compartment, sometimes hidden under the carpet; On the driver side, between the footrest area and door, sometimes hidden under the carpet.
What is the automatic shut down relay on a jeep?
ASD relay “Automatic Shut Down relay” used on all EFI jeeps. 1990 to present. What is it? It is a safety device, that exists by LAW and for good reasons. It CAN prevent FUEL fires (the Classic Crash and burn reason) and engine hyrdolocking.
Where is terminal 86 on a fuel pump relay?
The (PCM) grounds the coil side of the relay through terminal number 85. Terminal number 86 supplies voltage to the coil side of the relay. When the (PCM) de-energizes the (ASD) and fuel pump relays, terminal number 87A connects to terminal 30. This is the OFF position.
Where are the fuses located in a Jeep Liberty?
The electrical power distribution center is located in the engine compartment near the battery. This power center houses plug-in “Cartridge” fuses that replace in-line fusible links.
If pressure now holds at or above 30 psi, a leak may be found at a fuel tube/line. If no leaks are found at fuel tubes or lines, one of the check valves in either the electric fuel pump, fuel fil- ter or fuel pressure regulator may be leaking.
How does the fuel filler work on a Jeep Liberty?
A fuel filler/vent tube assembly using a pressure/ vacuum, 1/4 turn fuel filler cap is used. The fuel filler tube contains a flap door located below the fuel fill cap. A one-way check valve is installed into the tanks fuel fill fitting.
Normal operating pressure should be 339 kPa +/–34 kPa (49.2 psi +/–5 psi). (7) Shut engine off. Fig. 2 CONNECTING ADAPTER TOOL—TYPICAL 1 – VEHICLE FUEL LINE 2 – TEST PORT “T” 3 – SPECIAL TOOL 6923, 6631, 6541 OR 6539 4 – FUEL PRESSURE TEST GAUGE 5 – FUEL LINE CONNECTION AT RAIL 6 – FUEL RAIL KJ FUEL DELIVERY 14 – 3 FUEL DELIVERY (Continued) 4.
What are the problems with a 2002 Jeep Liberty?
That could have led to a loss of steering control and increased accident risks. According to the Insurance Institute for Highway Safety crash tests, the 2002 Jeep Liberty did not fare well overall. The rear crash test rating was actually poor while the rest was just marginal overall.
When did Jeep stop making the Jeep Liberty?
When it was replaced in 2012, the Jeep Cherokee took over. The Cherokee had been what the Liberty was called in markets outside of North America. Arguably that means the Liberty is still in production, but now it is just known as the Jeep Cherokee.
Are there any issues with the 2008 Liberty?
Even though there were still issues with the gas tank overflowing and problems with the windows for the 2008 Liberty model year, one of the biggest recurring issues for this year was a faulty TIPM.
What was the rating of the Jeep Liberty in 2006?
Based on the Insurance Institute for Highway Safety crash testing, the 2006 Jeep Liberty was also poorly rated, in particular is it related to rear crash test results. The Jeep Liberty fared a little bit better in 2007 than it did in 2006 in terms of problems reported by drivers.
How does a fuel injector work on a Jeep Liberty?
(6) Unplug connector from any fuel injector. (7) Attach one end of a jumper wire with alligator clips (18 gauge or smaller) to either injector terminal. (8) Connect other end of jumper wire to positive side of battery. (9) Connect one end of a second jumper wire to remaining injector terminal.
(6) Unplug connector from any fuel injector. (7) Attach one end of a jumper wire with alligator clips (18 gauge or smaller) to either injector terminal. (8) Connect other end of jumper wire to positive side of battery. (9) Connect one end of a second jumper wire to remaining injector terminal.
When to replace a fuse on a jeep?
Look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Check those fuses first that protect the failed component, but check all the fuses before deciding that a blown fuse is not the cause. Replace any blown fuses with another with the same amperage (same color) and check the component’s operation.