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 MANUALSTOYOTA2006SEQUOIA 4WD V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISWINDOWS AND GLASSWINDOWSTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSFRONT PASSENGER SIDE DOOR WINDOW LOCK SIGNAL CIRCUIT
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)
Front Passenger Side Door Window Lock Signal Circuit
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)SECTION Front Passenger Side Door Window Lock Signal Circuit
Front Passenger Side Door Window Lock Signal Circuit
DESCRIPTION
The passenger side power window lock switch circuit can be checked using the DTC check.
The window lock switch is built in the passenger door ECU. Voltage applied to the LSW terminal of the passenger door ECU is shut off when the window lock switch is turned to the LOCK position. The power main relay stops power supply to the other power window control switches.
INSPECTION PROCEDURE
HINT: When using the intelligent tester, start the inspection from step 1 and when not using the intelligent tester, start from step 2.
Check if DTC B1223 of the multiplex communication system is output. When the DTC is not output, proceed to the following procedures and when it is output, perform inspection.
DESCRIPTION
The passenger side power window lock switch circuit can be checked using the DTC check.
The window lock switch is built in the passenger door ECU. Voltage applied to the LSW terminal of the passenger door ECU is shut off when the window lock switch is turned to the LOCK position. The power main relay stops power supply to the other power window control switches.
Wiring Diagram:
Step 1:
Step 1(Continued)-2:
INSPECTION PROCEDURE
HINT: When using the intelligent tester, start the inspection from step 1 and when not using the intelligent tester, start from step 2.
Check if DTC B1223 of the multiplex communication system is output. When the DTC is not output, proceed to the following procedures and when it is output, perform inspection.
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.