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 FRAMEDOORS, HOOD AND TRUNKTRUNK / LIFTGATETESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSPOWER BACK DOOR SYSTEMMAIN SWITCH CIRCUIT
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) Hybrid
Main Switch Circuit
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) HybridSECTION Main Switch Circuit
Main Switch Circuit
DESCRIPTION
The power back door main switch only turns on while the switch is being pressed, and turns off when the switch is released.
The power back door ECU is connected to the power back door main switch via terminals MSW and MSE, and power back door operation cancel request signals are input to the ECU.
The power back door ECU applies voltage to the power back door main switch via terminal MSW. When the switch is on (there is continuity between the switch terminals), a power back door operation cancel request signal is input to the power back door ECU.
NOTE: The power back door ECU records the back door positions in the memory. In the case where any of the batteries, fuses, power back door ECU and power back door drive unit are removed and then reinstalled, the power back door ECU loses the memory of the door positions. In such a case, resetting the power back door system is necessary. Refer to the resetting operation specified.
INSPECTION PROCEDURE
DESCRIPTION
The power back door main switch only turns on while the switch is being pressed, and turns off when the switch is released.
The power back door ECU is connected to the power back door main switch via terminals MSW and MSE, and power back door operation cancel request signals are input to the ECU.
The power back door ECU applies voltage to the power back door main switch via terminal MSW. When the switch is on (there is continuity between the switch terminals), a power back door operation cancel request signal is input to the power back door ECU.
NOTE: The power back door ECU records the back door positions in the memory. In the case where any of the batteries, fuses, power back door ECU and power back door drive unit are removed and then reinstalled, the power back door ECU loses the memory of the door positions. In such a case, resetting the power back door system is necessary. Refer to the resetting operation specified.
Wiring Diagram:
Step 1:
Step 1(Continued)-2:
Step 3:
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.