LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 1997 >> LS 400 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Programming >> Additional Master Key Programming
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Additional Master Key Programming

NOTE: This is done for an additional master key.
  1. Perform this step within 15 seconds. Ensure all doors are closed and key is not in ignition. Insert master key in ignition, then turn ignition from LOCK to ON 5 times, ending with ignition ON.
  2. Perform this step within 20 seconds of completing last step. Open and close driver's door 6 times. Remove master key from ignition.
  3. Perform this step within 10 seconds of completing last step. Insert new master key in ignition.
  4. Perform this step within 10 seconds of completing last step. Turn ignition on for 60 seconds or more. Remove key from ignition.
  5. If registering another master key, remove registered master key and insert new master key within 10 seconds. Turn ignition on for 60 seconds or more. Remove key from ignition.
  6. To end programming, open and close driver's door.
scientia non olet · About LEMON Manuals