Mitsubishi L300 Workshop Manuals and Repair Manuals

To adjust the headlights in your Mitsubishi L300, park the vehicle on a level surface facing a wall or garage door. Measure and mark a horizontal reference line on the wall at the same height as the center of the headlights. Back the vehicle up approximately 25 feet, turn on the low beam headlights, and locate the vertical and horizontal adjustment screws on the back of each headlight assembly. Use a screwdriver or a suitable tool to adjust the headlights until the light beams align with the reference line on the wall.

To bleed the brakes in your Mitsubishi L300, start by filling the brake fluid reservoir to the recommended level and ensuring it remains topped up throughout the process. Begin with the brake farthest from the master cylinder (usually the rear passenger-side brake) and attach a clear plastic hose to the bleeder valve. Submerge the other end of the hose in a container partially filled with brake fluid. Have a helper press the brake pedal slowly and hold it down while you open the bleeder valve to release any air bubbles. Close the valve before the brake pedal is released, and repeat the process until all air is purged from the system, moving from the farthest to the closest brake.

To change the oil in your Mitsubishi L300, start by locating the oil drain plug underneath the vehicle. Once located, use a wrench to loosen and remove the drain plug, allowing the old oil to drain completely. After the oil has drained, replace the drain plug, and then unscrew the oil filter using an oil filter wrench. Replace the old oil filter with a new one, and then pour the recommended amount of fresh oil into the engine through the oil filler cap.

To check and top up the transmission fluid in your Mitsubishi L300, park the vehicle on a level surface and engage the parking brake. Locate the transmission dipstick, usually found near the back of the engine compartment. With the engine running and at operating temperature, remove the dipstick, wipe it clean, and reinsert it. Remove the dipstick again and check the fluid level against the markings on the dipstick. If the level is low, add the recommended transmission fluid through the dipstick tube using a funnel.

To replace a blown fuse in your Mitsubishi L300, start by locating the fuse box, which is usually located under the dashboard or in the engine compartment. Once located, consult the owner's manual or the fuse box cover to identify the specific fuse that needs to be replaced. Use a fuse puller or a pair of needle-nose pliers to remove the blown fuse and replace it with a new one of the same amperage rating.

To replace a brake light bulb in your Mitsubishi L300, start by accessing the rear light assembly. This is usually done by opening the trunk or rear hatch and removing any covers or trim panels that provide access to the lights. Once the light assembly is exposed, locate the brake light bulb socket, twist it counterclockwise, and pull it out. Remove the old bulb and replace it with a new one of the same type and wattage. Finally, reinsert the bulb socket into the light assembly, twist it clockwise to secure it, and test the brake lights.

To replace a serpentine belt in your Mitsubishi L300, start by locating the belt tensioner, which is usually a spring-loaded pulley. Use a wrench or a socket and breaker bar to rotate the belt tensioner counterclockwise, relieving tension on the belt. Once the tension is released, carefully slide the old belt off the pulleys, making note of the belt routing. Install the new belt following the same routing, ensuring it is properly seated on each pulley. Finally, release the tensioner slowly, allowing it to apply proper tension to the new belt.

To replace the cabin air filter in your Mitsubishi L300, start by locating the cabin air filter housing, which is usually located behind the glove compartment or under the dashboard. Open the glove compartment and remove any contents, as well as any screws or clips holding the glove compartment in place. Once the glove compartment is removed, locate the cabin air filter housing cover, remove it, and take out the old filter. Replace the old filter with a new one, ensuring it is properly seated, and then reassemble the glove compartment.

To replace the fuel filter in your Mitsubishi L300, start by locating the fuel filter, which is usually located along the fuel line under the vehicle or inside the engine compartment. Before removing the old filter, relieve the fuel system pressure by removing the fuel pump fuse or relay and then starting the engine until it stalls. Once the fuel system is depressurized, use line wrenches or appropriate tools to disconnect the fuel lines from the filter. Remove the mounting bracket or clamps securing the filter, and then replace the old filter with a new one. Reconnect the fuel lines, ensuring they are properly tightened, and reinstall the fuel pump fuse or relay.

To reset the maintenance reminder light in your Mitsubishi L300, begin by turning the ignition switch to the "ON" position without starting the engine. Within three seconds, fully press the accelerator pedal three times. Afterward, turn the ignition switch to the "OFF" position and then start the engine to confirm that the maintenance reminder light has been reset. It is important to note that the exact procedure may vary depending on the specific model year and trim level of your L300, so consulting the owner's manual is recommended.

To test the alternator in your Mitsubishi L300, start the engine and let it idle. Use a voltmeter to measure the voltage across the battery terminals. The voltage should read around 13.5 to 14.5 volts, indicating that the alternator is charging the battery properly. If the voltage is significantly lower or higher, it may indicate a problem with the alternator or the charging system, and further diagnosis or repair may be necessary.

The spark plugs in your Mitsubishi L300 should generally be replaced every 30,000 to 50,000 miles, or as recommended by the manufacturer. However, it is advisable to inspect the spark plugs regularly for signs of wear or fouling. Worn or fouled spark plugs can lead to poor engine performance, misfires, and reduced fuel efficiency.

The air filter in your Mitsubishi L300 should generally be replaced every 12,000 to 15,000 miles or once a year, depending on driving conditions. However, it is advisable to inspect the air filter regularly and replace it if it appears dirty or clogged. A dirty air filter restricts airflow to the engine, reducing performance and fuel efficiency.

The recommended tire pressure for your Mitsubishi L300 may vary depending on the specific model and tire size. Typically, the recommended tire pressure can be found in the owner's manual or on a sticker located on the driver's side door jamb. It is important to maintain the correct tire pressure as specified to ensure proper handling, tire longevity, and fuel efficiency.

For your Mitsubishi L300, it is recommended to use a high-quality ethylene glycol-based coolant with a mix of 50% coolant and 50% distilled water. This coolant mixture provides optimal protection against freezing, boiling, and corrosion. Before adding coolant, ensure that the engine is cool and open the radiator cap slowly to avoid any potential pressure build-up.