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.
2012 Lexus IS 250C Automatic TransFACTORY OEM SERVICE PROCEDURE
Junction Block and Wire Harness Connector
| Code | See | Junction Block and Wire Harness (Connector Location) |
|---|---|---|
| 2F | : ENGINE ROOM R/B NO. 2 ASSEMBLY; : ENGINE ROOM J/B NO. 2 ASSEMBLY - LEFT ENGINE COMPARTMENT | Engine Room Main Wire and Engine Room J/B No. 2 Assembly (Left Engine Compartment) |
| LA | : COWL SIDE J/B LH - COWL SIDE LEFT | Instrument Panel Wire and Cowl Side J/B LH (Cowl Side Left) |
| LD | ||
| LL | : COWL SIDE J/B LH - COWL SIDE LEFT | Engine Room Main Wire and Cowl Side J/B LH (Cowl Side Left) |
| RA | : COWL SIDE J/B RH - COWL SIDE RIGHT | Instrument Panel Wire and Cowl Side J/B RH (Cowl Side Right) |
| RD | ||
| RJ | : COWL SIDE J/B RH - COWL SIDE RIGHT | Floor Wire and Cowl Side J/B RH (Cowl Side Right) |
| RK | : COWL SIDE J/B RH - COWL SIDE RIGHT | Engine Room Main Wire and Cowl Side J/B RH (Cowl Side Right) |
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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