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.

2003 Toyota Highlander Limited, FWDFACTORY OEM SERVICE PROCEDURE

Power Door Lock Control System DTCS

POWER WINDOW CONTROL SYSTEM DIAGNOSTIC TROUBLE CODES (DTC) IDENTIFICATION

DTC	Description
B1222/22	DOOR LOCK SWITCH CIRCUIT ON DRIVER DOOR
B1223/23	POWER WINDOW SWITCH CIRCUIT ON PASSENGER DOOR
B1224/24	DOOR LOCK SWITCH CIRCUIT ON PASSENGER DOOR

Factory Service Tools

Use the Manual With the Right Hardware

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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.