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 MANUALSTOYOTA2007HIGHLANDER 2WD V6-3.3L (3MZ-FE)REPAIR AND DIAGNOSISBODY AND FRAMELOCKSKEYLESS ENTRYTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSPOWER SOURCE CIRCUIT
2007 Toyota Highlander 2WD V6-3.3L (3MZ-FE)
Power Source Circuit
2007 Toyota Highlander 2WD V6-3.3L (3MZ-FE)SECTION Power Source Circuit
Power Source Circuit
DESCRIPTION
This is the power source circuit for the multiplex network body ECU.
Power is supplied to the multiplex network body ECU via the BECU and BDR circuits. The BECU circuit is used as the power source circuit of the ECU. The BDR circuit is used as the backup power source circuit of the ECU and the power source circuit to activate the wireless door lock buzzer, and other functions.
INSPECTION PROCEDURE
DESCRIPTION
This is the power source circuit for the multiplex network body ECU.
Power is supplied to the multiplex network body ECU via the BECU and BDR circuits. The BECU circuit is used as the power source circuit of the ECU. The BDR circuit is used as the backup power source circuit of the ECU and the power source circuit to activate the wireless door lock buzzer, and other functions.
Wiring Diagram:
Step 1:
Step 2:
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.