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.
2000 Lexus GS 400FACTORY OEM SERVICE PROCEDURE
Electrical Component Locator: Connectors
CONNECTORS
| Component | Component Location |
|---|---|
| BA1 (12 Pin) | Under left "B" pillar. |
| BB1 (12 Pin) | Under right "B" pillar. |
| BC1 (12 Pin) | Under left front seat. |
| BD1 (12 Pin) | Under right front seat. |
| EA1 (3.0L) (12 Pin) | Inside ECU box. See Figure. |
| EA1 (4.0L) (12 Pin) | Inside ECU box. See Figure. |
| EA2 (3.0L) (10 Pin) | Inside ECU box. See Figure. |
| EA2 (4.0L) (10 Pin) | Inside ECU box. See Figure. |
| EA3 (3.0L) (9 Pin) | Inside ECU box. See Figure. |
| EA3 (4.0L) (9 Pin) | Inside ECU box. See Figure. |
| EA4 (3.0L) (11 Pin) | Inside ECU box. See Figure. |
| EA4 (4.0L) (11 Pin) | Inside ECU box. See Figure. |
| EB1 (3.0L) (12 Pin) | Inside engine room R/B No. 3. See Figure. |
| EB1 (4.0L) (12 Pin) | Inside engine room R/B No. 3. See Figure. |
| EB2 (3.0L) (4 Pin) | Inside engine room R/B No. 3. See Figure. |
| EB2 (4.0L) (4 Pin) | Inside engine room R/B No. 3. See Figure. |
| EC1 (4.0L) (Black, 3 Pin) | Near starter. See Figure. |
| IA1 (Orange, 10 Pin) | Near driver side J/B. |
| IA2 (Blue, 18 Pin) | Near driver side J/B. |
| IB1 (17 Pin) | At left kick panel. |
| IC1 (Blue, 18 Pin) | At left kick panel. |
| IC2 (Orange, 10 Pin) | At left kick panel. |
| IC3 (20 Pin) | At left kick panel. |
| ID1 (9 Pin) | At left side of dash reinforcement. |
| IE1 (Blue, 18 Pin) | Behind left side of dash, at left side of steering column. |
| IE2 (14 Pin) | Behind left side of dash, at left side of steering column. |
| IF1 (Yellow, 2 Pin) | Behind left side of dash, at right side of steering column. |
| IG1 (3 Pin) | At left side of blower unit. |
| IH1 (14 Pin) | At left side of blower unit. |
| II1 (2 Pin) | Near passenger side J/B. |
| II2 (Blue, 18 Pin) | Near passenger side J/B. |
| II3 (Yellow, 2 Pin) | Near passenger side J/B. |
| II4 (Orange, 10 Pin) | Near passenger side J/B. |
| IJ1 (Gray, 14 Pin) | At left side of blower unit. |
| IJ2 (Blue, 22 Pin) | At left side of blower unit. |
| IJ3 (Orange, 12 Pin) | At left side of blower unit. |
| IK1 (17 Pin) | At right kick panel. |
| IL1 (Blue, 18 Pin) | At right kick panel. |
| IL2 (Orange, 10 Pin) | At right kick panel. |
| IL3 (20 Pin) | At right kick panel. |
| IM1 (11 Pin) | At right front side of shift lever. |
| IM2 (Blue, 18 Pin) | At right front side of shift lever. |
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.