WARNING: This page is about a different car, the 2003 Lexus GS 430, 2003 Lexus GS 300, 2002 Lexus GS 430, and 2002 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.

COMPONENT LOCATIONS

Component	Location
Anti-Theft Horn	Fig 1
Anti-Theft Indicator	Fig 1
Body ECU No. 1	Fig 1 & Fig 3
Body ECU No. 2	Fig 2 & Fig 4
Brake Fluid Level Warning Switch	Fig 2
Clock	Fig 2
DOME Fuse	Fig 3
Driver Buckle Switch	Fig 2
ECU-B2 Fuse	Fig 3
ECU-IG Fuse	Fig 4
Fog Light Relay	Fig 2
Front Personal Light	Fig 2
Hazard Switch	Fig 1
Hood Courtesy Switch	Fig 1
Horn	Fig 1
Key Unlock Warning Switch	Fig 2
Lamp Failure Sensor	Fig 2
Light Control Sensor	Fig 2
Light Control Switch	Fig 2
Luggage Courtesy Switch	Fig 1
Luggage Door Key Lock & Unlock Switch	Fig 1
Luggage Opener Motor	Fig 1
Luggage Opener Switch	Fig 1
Mirror Switch	Fig 2
P FR DOOR Fuse	Fig 5
Parking Brake Switch	Fig 1
Passenger Buckle Switch	Fig 1
Pattern Select Switch	Fig 1
RADIO NO. 2 Fuse	Fig 4
Seat Belt Warning Occupant Detection Sensor	Fig 1
Stop Light Switch	Fig 2
Wireless Door Lock Buzzer	Fig 1
Wireless Door Lock Tuner	Fig 1

Fig 1: Identifying Body ECU No. 1 Control System Component Locations

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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.

Safety Warning

Component Locations

Use the Manual With the Right Hardware

When to See a Mechanic

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