Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSLEXUS2004LX 470 V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISBODY AND FRAMELOCKSKEYLESS ENTRYTESTING AND INSPECTIONPROGRAMMING AND RELEARNINGREGISTRATION
2004 Lexus LX 470 V8-4.7L (2UZ-FE)
Registration
2004 Lexus LX 470 V8-4.7L (2UZ-FE)SECTION Registration
HOW TO CODE REGISTRATION
NOTE: When replacing the theft deterrent ECU or transmitter, registration of recognition code is necessary because they are provided as a single components.
a. Select the operation mode.
- Add mode
- Rewrite mode
- Prohibition mode
- Confirmation mode
HINT:
- The "Add mode" is for adding new recognition codes while retaining the already registered codes. This mode is used when the transmitter is added. When the number of the registered codes exceeds 4 codes, the previously registered codes will be erased in order, staring from the first registered code.
- The "Rewrite mode" is for erasing all the registered codes and registering newly recognized codes only. This mode is used when the transmitter or the door control receiver is replaced.
- The "Prohibition mode" is for erasing all the registered codes to prohibit the wireless door lock operation. This mode is used when the transmitter is lost.
- The "Confirmation mode" is for confirming the number of recognition codes that are registered. This mode is used to check the number of registered codes when new codes are added to the registration, etc.
b. Follow the chart on the following page to register the transmitter recognition code to the theft deterrent ECU.
HINT:
- When procedure is outside the specification, the registration operation is cancelled. Maximum of 4 recognition codes can be registered.

c. By LEXUS Hand-Held Tester
HINT:
This image is to show the registration procedure briefly using the hand-held tester.
For detailed procedures, please refer to the prompts on the tester screen.
The number of currently registered codes can be checked out on the first screen of the WIRELESS REGISTRATION


d. By Switch Operation:

HINT:
Operation cycle of the door lock (lock/unlock operation)
NOTE: When replacing the theft deterrent ECU or transmitter, registration of recognition code is necessary because they are provided as a single components.
a. Select the operation mode.
- Add mode
- Rewrite mode
- Prohibition mode
- Confirmation mode
HINT:
- The "Add mode" is for adding new recognition codes while retaining the already registered codes. This mode is used when the transmitter is added. When the number of the registered codes exceeds 4 codes, the previously registered codes will be erased in order, staring from the first registered code.
- The "Rewrite mode" is for erasing all the registered codes and registering newly recognized codes only. This mode is used when the transmitter or the door control receiver is replaced.
- The "Prohibition mode" is for erasing all the registered codes to prohibit the wireless door lock operation. This mode is used when the transmitter is lost.
- The "Confirmation mode" is for confirming the number of recognition codes that are registered. This mode is used to check the number of registered codes when new codes are added to the registration, etc.
b. Follow the chart on the following page to register the transmitter recognition code to the theft deterrent ECU.
HINT:
- When procedure is outside the specification, the registration operation is cancelled. Maximum of 4 recognition codes can be registered.
c. By LEXUS Hand-Held Tester
HINT:
This image is to show the registration procedure briefly using the hand-held tester.
For detailed procedures, please refer to the prompts on the tester screen.
The number of currently registered codes can be checked out on the first screen of the WIRELESS REGISTRATION
d. By Switch Operation:
HINT:
Operation cycle of the door lock (lock/unlock operation)
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.