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 DIAGNOSISBODY AND FRAMELOCKSPOWER LOCKSTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSBACK DOOR COURTESY SWITCH CIRCUIT
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) Hybrid
Back Door Courtesy Switch Circuit
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) HybridSECTION Back Door Courtesy Switch Circuit
Back Door Courtesy Switch Circuit
DESCRIPTION
w/o power back door system:
The back door courtesy switch is built into the back door lock assembly. The switch turns on when the back door is opened and turns off when the door is closed. The body ECU applies voltage to the back door lock assembly via terminal BCTY. Back door open/close state signals are input to the body ECU.
w/ power back door system:
The back door courtesy switch is built into the back door lock assembly. The switch turns on when the back door is opened and turns off when the door is closed. The power back ECU applies voltage to the back door lock assembly via terminal CTYE. Back door open/close state signals are input to the power back door ECU. The back door ECU sends the back door open/close state signals to the body ECU.
INSPECTION PROCEDURE
DESCRIPTION
w/o power back door system:
The back door courtesy switch is built into the back door lock assembly. The switch turns on when the back door is opened and turns off when the door is closed. The body ECU applies voltage to the back door lock assembly via terminal BCTY. Back door open/close state signals are input to the body ECU.
w/ power back door system:
The back door courtesy switch is built into the back door lock assembly. The switch turns on when the back door is opened and turns off when the door is closed. The power back ECU applies voltage to the back door lock assembly via terminal CTYE. Back door open/close state signals are input to the power back door ECU. The back door ECU sends the back door open/close state signals to the body ECU.
Wiring Diagram:
Step 1:
Step 2:
Step 3-4:
Step 5:
Step 6:
Step 7:
INSPECTION PROCEDURE
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:
- • 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.