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 Lexus LS 430FACTORY OEM SERVICE PROCEDURE
Electrical Component Locator: Connectors
CONNECTORS LOCATION
| Component | Component Location |
|---|---|
| BA1 (White, 6 Pin) | At left "B" pillar. |
| BA2 (White, 10 Pin) | At left "B" pillar. |
| BB1 (White, 6 Pin) | At right "B" pillar. |
| BB2 (White, 10 Pin) | At right "B" pillar. |
| BC1 (White, 9 Pin) | At left rear floor partition panel. |
| BD1 (White, 10 Pin) | At left lower back panel. |
| BE1 (White, 17 Pin) | At right lower back panel. |
| BE2 (Gray, 22 Pin) | At right lower back panel. |
| BF1 (White, 17 Pin) | Under left front seat. |
| BG2 (White, 17 Pin) | Under right front seat. |
| BH1 (White, 20 Pin) | Under left rear seat. |
| BI1 (White, 20 Pin) | Under right rear seat. |
| EA1 (Black, 8 Pin) | Under left headlight. See Figure. |
| EB1 (White, 14 Pin) | Inside ECU box. See Figure. |
| EB2 (White, 10 Pin) | Inside ECU box. See Figure. |
| EC1 (White, 3 Pin) | Behind intake manifold. See Figure. |
| IA1 (White, 17 Pin) | At left kick panel. See Figure. |
| IB1 (Yellow, 2 Pin) | At left side of dash. See Figure. |
| IB2 (White, 1 Pin) | At left side of dash. See Figure. |
| IB3 (Gray, 22 Pin) | At left side of dash. See Figure. |
| IB4 (Black, 13 Pin) | At left side of dash. See Figure. |
| IC1 (White, 11 Pin) | At left side of dash. See Figure. |
| IC2 (White, 10 Pin) | At left side of dash. See Figure. |
| IC3 (Gray, 18 Pin) | At left side of dash. See Figure. |
| ID1 (White, 14 Pin) | At left side of dash. See Figure. |
| IE1 (White, 2 Pin) | At left kick panel. See Figure. |
| IF1 (White, 22 Pin) | At right side of shift lever. See Figure. |
| IF2 (White, 14 Pin) | At left side of shift lever. See Figure. |
| IG1 (White, 11 Pin) | At right side of dash. See Figure. |
| IG2 (Gray, 22 Pin) | At right side of dash. See Figure. |
| IH1 (Yellow, 2 Pin) | At right side of dash. See Figure. |
| IH2 (White, 14 Pin) | At right side of dash. See Figure. |
| IH3 (White, 1 Pin) | At right side of dash. See Figure. |
| II1 (White, 22 Pin) | At right side of dash. See Figure. |
| II2 (White, 9 Pin) | At right side of dash. See Figure. |
| IJ1 (White, 17 Pin) | At right kick panel. See Figure. |
Factory Service Tools
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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.
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