Lexus LS 400 Workshop Manuals and Repair Manuals

To change the oil in your Lexus LS 400, locate the oil drain plug underneath the engine and remove it using a wrench. Allow the old oil to drain completely into a drain pan, then replace the drain plug and tighten it. Next, remove the oil filter using an oil filter wrench, and replace it with a new one, making sure to lubricate the gasket with fresh oil. Finally, refill the engine with the recommended amount of fresh oil, and check the oil level using the dipstick.

To check the brake fluid level in a Lexus LS 400, start by locating the brake fluid reservoir, which is usually located near the engine firewall on the driver's side. Clean the area around the reservoir cap to prevent any dirt from entering the system. Remove the cap and visually inspect the fluid level; it should be between the minimum and maximum marks on the reservoir. If the level is low, add the recommended brake fluid to bring it up to the appropriate level. Be cautious not to spill brake fluid on any painted surfaces as it can cause damage.

To check the transmission fluid level in your Lexus LS 400, start the engine and let it idle for a few minutes to warm up. Then, locate the transmission dipstick, usually located near the back of the engine compartment. Pull out the dipstick, wipe it clean, reinsert it fully, and pull it out once again. Check the fluid level indicated on the dipstick; it should be within the designated range. If the level is low, add the recommended automatic transmission fluid through the dipstick tube, being careful not to overfill.

To jump-start a Lexus LS 400, you will need a set of jumper cables and another vehicle with a charged battery. Park the vehicles close to each other, turn off the engines, and make sure both vehicles are in Park or Neutral. Connect the positive (+) cable to the positive terminal of the dead battery, then connect the other end of the positive cable to the positive terminal of the charged battery. Next, connect the negative (-) cable to the negative terminal of the charged battery, and attach the other end of the negative cable to a metal ground point on the dead vehicle, away from the battery. Start the engine of the vehicle with the charged battery, let it run for a few minutes, then try starting the Lexus LS 400.

To perform a coolant flush in a Lexus LS 400, start by allowing the engine to cool down completely. Locate the radiator drain plug or petcock at the bottom of the radiator and place a drain pan underneath. Open the drain plug or petcock and allow the coolant to drain completely. Once drained, close the drain plug or petcock and refill the radiator with a coolant mixture recommended by the manufacturer. Start the engine and let it run with the radiator cap off until it reaches operating temperature. Check the coolant level and top it up if necessary. Finally, replace the radiator cap and dispose of the old coolant properly.

To replace a cabin air filter in a Lexus LS 400, locate the cabin air filter housing, which is typically located behind the glove box or under the dashboard. Open the housing by removing any retaining clips or screws. Take out the old cabin air filter and clean the housing if necessary. Install the new cabin air filter in the correct orientation, ensuring it fits snugly. Close the housing and secure it with the retaining clips or screws. It is recommended to replace the cabin air filter every 12,000 to 15,000 miles or as indicated in the owner's manual.

To replace a fuse in a Lexus LS 400, first, locate the fuse box, which is usually found under the dashboard or in the engine compartment. Open the fuse box cover, and using the fuse diagram on the inside of the cover or in the owner's manual, identify the fuse that needs to be replaced. Gently pull the fuse out using a fuse puller or a pair of needle-nose pliers. Inspect the fuse to ensure it is blown, and if so, replace it with a new fuse of the same rating. Finally, close the fuse box cover.

To replace a headlight bulb in your Lexus LS 400, first, open the hood and locate the backside of the headlight assembly. Disconnect the electrical connector from the bulb by gently pressing the release tab and pulling it off. Then, twist the bulb socket counterclockwise and remove it from the assembly. Take out the old bulb and replace it with a new one, making sure not to touch the glass part. Finally, reinsert the bulb socket into the assembly, twist it clockwise to lock it in place, and reconnect the electrical connector.

To replace a serpentine belt in a Lexus LS 400, locate the belt tensioner, which is usually a pulley with a spring-loaded arm. Using a wrench or a belt tensioner tool, rotate the tensioner in the direction that relieves tension on the belt. Slip the old belt off the pulleys and carefully release the tensioner. Route the new serpentine belt around the pulleys according to the belt routing diagram, ensuring it is properly seated. Finally, double-check the belt's alignment on all the pulleys and release the tensioner, allowing it to apply tension to the new belt.

To replace the windshield wipers on a Lexus LS 400, lift the wiper arm away from the windshield and locate the release mechanism. Press or slide the release mechanism to unlock the old wiper blade from the wiper arm. Remove the old wiper blade by pulling it away from the arm. Align the new wiper blade with the wiper arm and slide it into place until it clicks securely. Gently lower the wiper arm back onto the windshield, and repeat the process for the other wiper.

To reset the maintenance required light in a Lexus LS 400, turn the ignition switch to the "ON" position without starting the engine. Fully press and release the accelerator pedal five times within five seconds. The maintenance required light should start flashing and then turn off, indicating that the reset was successful. If the light remains illuminated, repeat the process or consult the vehicle's manual for further instructions.

To troubleshoot an engine misfire in a Lexus LS 400, start by checking for any stored diagnostic trouble codes (DTCs) using an OBD-II scanner. If any DTCs related to the misfire are present, address the underlying issue indicated by the code. If no DTCs are present, inspect the spark plugs, ignition coils, and fuel injectors for any signs of damage or wear. Check the spark plug wires or ignition coil connectors for

The air filter in a Lexus LS 400 should typically be replaced every 12,000 to 15,000 miles, or as recommended by the manufacturer. However, if you frequently drive in dusty or polluted areas, it may require more frequent replacement. A clogged or dirty air filter can negatively impact engine performance and fuel efficiency, so it is important to regularly inspect and replace the air filter as needed.

The recommended tire pressure for a Lexus LS 400 is typically 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 to ensure proper handling, fuel efficiency, and tire longevity. Use a tire pressure gauge to check the current pressure of each tire and adjust them accordingly to match the recommended specifications.