This step-by-step guide shows how to use the Autel MaxiIM KM100 to program Lexus all keys lost on vehicles with 4D 68 transponder chips. The entire process is done via OBD-II, with no ECU removal or expensive dealership trips required.
Step 1: Access Immobilizer Menu
Turn on the Autel KM100E and navigate:
IMMO → Lexus → System Selection → Immobilizer → Immobilizer (4D 67/68) → Quick Reset of Immobilizer
Step 2: Reset Immobilizer
Confirm the on-screen notes:
- All existing keys will be cleared.
- At least two keys are required.
- One must be a master key.
Press OK and wait approximately 10 seconds for the reset to complete.
Step 3: Learn Your Keys
Option A – Learning Two Master Keys & One Slave Key
- Insert the first master key into the ignition (OFF position), wait 5 seconds.
- Insert the second master key (OFF position), wait 5 seconds.
- Insert the slave key (OFF position) until the security light turns off.
Option B – Learning Two Keys Only
- Insert the first master key (OFF position), wait 5 seconds.
- Insert the second key (master or slave) and wait 5 seconds.
- Remove the key, reinsert the first master key, and quickly turn the ignition ON and OFF five times until the security light goes out.
Step 4: Verification
If the security light continues flashing, repeat the learning process.
Once completed, start the vehicle to confirm successful programming.
Why Choose Autel KM100 for Lexus Key Programming?
✅ OBD-Only Process – No ECU removal or complex disassembly.
✅ 4D 68/67 Chip Support – Direct compatibility with Lexus transponders.
✅ Guided Workflow – Clear on-screen instructions prevent errors.
✅ Fast & Reliable – Complete most jobs in under 10 minutes.
✅ Professional Tool – Trusted by locksmiths and workshops worldwide.
Frequently Asked Questions (FAQ)
Q: Does this work for Lexus 4D 67 chips?
A: Yes, the KM100 supports both 4D 67 and 4D 68 chips.
Q: Can I program a single key?
A: No, at least two keys are required for the immobilizer learning process.
Q: What if the security light keeps flashing?
A: Repeat the key learning steps carefully, ensuring keys are inserted in the OFF position.
Need Support?
Email: sales@AutelShop.de
WeChat / WhatsApp: +86-13429866263
Ready to Master Lexus Key Programming?
The Autel KM100 turns complex all-keys-lost scenarios into a simple, repeatable OBD process. Whether you’re a professional locksmith or a technician expanding your service offerings, this tool provides the speed, reliability, and ease-of-use you need.
Click www.autelshop.de to learn more or purchase the Autel KM100 today and start programming Lexus keys with confidence.v