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 MANUALSLEXUS2006RX 400H AWD V6-3.3L (3MZ-FE) HYBRIDREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULETESTING AND INSPECTIONPROGRAMMING AND RELEARNINGENGINE CONTROL SYSTEM - SFI SYSTEMREGISTRATION
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) Hybrid
Registration
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) HybridSECTION Registration
REGISTRATION
NOTE: The Vehicle Identification Number (VIN) must be input into the replacement HV control ECU.
HINT: The VIN is a 17-digit alphanumeric vehicle identification number. The intelligent tester is required to register the VIN.
1. INPUT INSTRUCTIONS
a. Explains the general VIN input instructions using the intelligent tester.
b. Intelligent Tester
The arrow buttons (UP, DOWN, RIGHT and LEFT)and numerical buttons (0 to 9) are used to input the VIN.
c. Cursor Operation
To move the cursor around the tester screen, press the RIGHT and LEFT buttons.
d. Alphabetical Character Input
1. Press the UP and DOWN buttons to select the desired alphabetical character.
2. After selection, the cursor should move.
e. Numeric Character Input
1. Press the numerical button corresponding to the number that you want to input.
2. Select or input the correct character using the UP/DOWN buttons, or the numerical buttons.
HINT: Numerical characters can be selected by using the UP and DOWN buttons.
f. Correction
1. After input, the cursor should move.
2. When correcting the input character(s), put the cursor onto the character using the RIGHT or LEFT buttons.
g. Finishing Input Operation
1. Make sure that the input VIN matches the vehicle VIN after input.
2. Press the ENTER button on the tester.
2. READ VIN (Vehicle Identification Number)
a. Explains the VIN reading process in a flowchart. Reading the VIN stored in the HV control ECU is necessary when comparing it to the VIN provided with the vehicle.
b. Read VIN using the intelligent tester.
c. Check the vehicle's VIN.
d. Connect the intelligent tester to the DLC3.
e. Turn the ignition switch to the ON position.
f. Turn the tester ON.
g. Enter the following menus: DIAGNOSIS /ENHANCED OBD II / VIN.
3. WRITE VIN
a. Explains the VIN writing process in a flowchart. This process allows the VIN to be input into the HV control ECU. If the HV control ECU is changed, or the HV control ECU VIN and Vehicle VIN do not match, the VIN can be registered, or overwritten in the HV control ECU by following this procedure.
b. Write VIN using the intelligent tester.
c. Connect the intelligent tester to the DLC3.
d. Turn the ignition switch to the ON position.
e. Turn the tester ON.
f. Enter the following menus: DIAGNOSIS /ENHANCED OBD II / VIN.
NOTE: The Vehicle Identification Number (VIN) must be input into the replacement HV control ECU.
HINT: The VIN is a 17-digit alphanumeric vehicle identification number. The intelligent tester is required to register the VIN.
1. INPUT INSTRUCTIONS
a. Explains the general VIN input instructions using the intelligent tester.
b. Intelligent Tester
The arrow buttons (UP, DOWN, RIGHT and LEFT)and numerical buttons (0 to 9) are used to input the VIN.
c. Cursor Operation
To move the cursor around the tester screen, press the RIGHT and LEFT buttons.
d. Alphabetical Character Input
1. Press the UP and DOWN buttons to select the desired alphabetical character.
2. After selection, the cursor should move.
e. Numeric Character Input
1. Press the numerical button corresponding to the number that you want to input.
2. Select or input the correct character using the UP/DOWN buttons, or the numerical buttons.
HINT: Numerical characters can be selected by using the UP and DOWN buttons.
f. Correction
1. After input, the cursor should move.
2. When correcting the input character(s), put the cursor onto the character using the RIGHT or LEFT buttons.
g. Finishing Input Operation
1. Make sure that the input VIN matches the vehicle VIN after input.
2. Press the ENTER button on the tester.
2. READ VIN (Vehicle Identification Number)
a. Explains the VIN reading process in a flowchart. Reading the VIN stored in the HV control ECU is necessary when comparing it to the VIN provided with the vehicle.
b. Read VIN using the intelligent tester.
c. Check the vehicle's VIN.
d. Connect the intelligent tester to the DLC3.
e. Turn the ignition switch to the ON position.
f. Turn the tester ON.
g. Enter the following menus: DIAGNOSIS /ENHANCED OBD II / VIN.
3. WRITE VIN
a. Explains the VIN writing process in a flowchart. This process allows the VIN to be input into the HV control ECU. If the HV control ECU is changed, or the HV control ECU VIN and Vehicle VIN do not match, the VIN can be registered, or overwritten in the HV control ECU by following this procedure.
b. Write VIN using the intelligent tester.
c. Connect the intelligent tester to the DLC3.
d. Turn the ignition switch to the ON position.
e. Turn the tester ON.
f. Enter the following menus: DIAGNOSIS /ENHANCED OBD II / VIN.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.