Lexus LS400 Workshop Manuals and Repair Manuals

To change the brake pads on a Lexus LS400, start by safely raising and supporting the vehicle. Remove the wheels to access the brake calipers. Use a suitable tool to compress the caliper piston, then remove the caliper bolts and lift off the caliper assembly. Remove the old brake pads and install the new ones, ensuring they are properly aligned. Finally, reassemble the caliper, reinstall the wheels, and properly torque the lug nuts.

To check the transmission fluid on a Lexus LS400, park the vehicle on a level surface and start the engine. Allow the engine to reach operating temperature, then locate the transmission dipstick, which is usually labeled and located near the back of the engine bay. Remove the dipstick, wipe it clean, reinsert it fully, and then remove it again to check the fluid level. The fluid should be within the designated marks on the dipstick. If the fluid is low, add the recommended type of transmission fluid through the dipstick tube, being cautious not to overfill.

To program a keyless entry remote for a Lexus LS400, start by sitting in the driver's seat with all doors closed. Insert the key into the ignition and quickly turn it from the "LOCK" to the "ON" position five times, ending in the "ON" position. After the fifth time, the door locks should cycle, indicating that the vehicle is in programming mode. Press any button on the remote, and the door locks should cycle again, confirming successful programming. Repeat the process for any additional remotes. Turn the ignition key to the "LOCK" position to exit programming mode.

To replace a battery on a Lexus LS400, start by turning off the engine and ensuring all electrical accessories are turned off. Locate the battery, typically located in the engine bay or trunk. Disconnect the negative (-) battery cable first, followed by the positive (+) cable. Remove any retaining brackets or clamps holding the battery in place, then carefully lift out the old battery. Install the new battery, ensuring it is properly aligned, and reconnect the positive (+) cable followed by the negative (-) cable. Finally, test the battery and ensure proper functionality before closing the battery compartment.

To replace a headlight bulb on a Lexus LS400, open the hood and locate the back of the headlight assembly. Twist the bulb socket counterclockwise to remove it from the assembly. Pull out the old bulb and insert the new one, being careful not to touch the glass portion of the bulb with bare hands. Reinsert the bulb socket into the assembly and twist it clockwise to secure it. Test the headlight to ensure it is functioning properly before closing the hood.

To replace a serpentine belt on a Lexus LS400, locate the belt tensioner and use a suitable tool to relieve tension on the belt. Slide the belt off the pulleys and carefully release the tensioner. Install the new belt, following the correct routing pattern as indicated on the belt routing diagram. Once the new belt is properly installed, double-check that it is correctly seated on all pulleys. Finally, release the tensioner to apply tension to the belt and ensure it is properly tensioned.

To replace the air filter on a Lexus LS400, open the hood of the vehicle and locate the air filter housing. Unclip the latches or remove the screws securing the housing, then lift the cover to access the old air filter. Remove the old air filter and replace it with a new one, ensuring it is properly seated. Finally, secure the housing cover back in place and ensure all latches or screws are securely fastened.

To replace the cabin air filter on a Lexus LS400, locate the cabin air filter housing, usually located behind the glove compartment. Remove the glove compartment by releasing the clips or removing the screws. Once the glove compartment is out of the way, locate the cabin air filter housing cover and remove it. Take out the old cabin air filter and replace it with a new one. Reinstall the housing cover and the glove compartment, ensuring all clips or screws are properly secured.

To reset the maintenance required light on a Lexus LS400, turn the ignition key to the "ON" position without starting the engine. Press and hold the trip meter reset button, then turn the ignition key to the "OFF" position. While still holding the trip meter reset button, turn the ignition key to the "ON" position again. Continue holding the button until the maintenance required light goes off, indicating that the reset was successful.

When troubleshooting a starting issue on a Lexus LS400, start by checking the battery for sufficient charge and clean connections. Ensure that the vehicle is in park or neutral, and try starting it again. If the starter motor does not engage or there is still no response, check the fuses related to the starting system. If all fuses are intact, it is recommended to consult a professional mechanic or refer to a repair manual for further diagnostic steps.

The coolant in a Lexus LS400 should be flushed and replaced every 30,000 to 50,000 miles or every 2 to 3 years, depending on the specific coolant type and driving conditions. Regular coolant flushes help maintain the cooling system's efficiency, prevent overheating, and protect against corrosion. It is recommended to follow the manufacturer's guidelines for coolant maintenance to ensure optimal performance.

The timing belt on a Lexus LS400 should be replaced every 90,000 miles or every 6 years, whichever comes first. The timing belt is a critical component of the engine's operation, and failure to replace it at the recommended intervals can result in serious engine damage. It is important to follow the manufacturer's recommendations for timing belt replacement to maintain the reliability of the vehicle.

The recommended oil type for a Lexus LS400 is 5W-30. It is important to use the recommended oil type as specified in the owner's manual to ensure optimal engine performance and longevity. Using the wrong oil type can lead to engine damage and may void the warranty.

The recommended tire pressure for a Lexus LS400 is typically 32 PSI (pounds per square inch) for both front and rear tires. However, it is always best to consult the owner's manual or the tire placard located on the driver's side door jamb for the exact recommended tire pressure. Proper tire pressure is crucial for optimal handling, fuel efficiency, and tire longevity.

The towing capacity of a Lexus LS400 is typically rated at 1,000 to 1,500 pounds, depending on the model year and specific configuration. It is important to consult the owner's manual or contact a Lexus dealership for the exact towing capacity for a particular vehicle. Exceeding the recommended towing capacity can lead to mechanical issues and compromise the safety of the vehicle.