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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSLEXUS2010RX 450H 3.5 BREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXNETWORKING DTCSLIN COMMUNICATION SYSTEM (FROM 08/2009)
2010 Lexus RX 450h 3.5 B
Lin Communication System (From 08/2009)
2010 Lexus RX 450h 3.5 BSECTION Lin Communication System (From 08/2009)
MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| B1206 | P/W Master Switch Communication Stop |
| B1273 | Sliding Roof ECU Communication Stop |
| B2287 | LIN Communication Master Malfunction |
| B2321 | Driver Side Door ECU Communication Stop |
| B2322 | Front Passenger Side Door ECU Communication Stop |
| B2323 | Rear Door RH ECU Communication Stop |
| B2324 | Rear Door LH ECU Communication Stop |
| B2325 | LIN Communication Bus Malfunction |
| B2424 | Headlight Leveling Motor LH Communication Malfunction |
| B2425 | Headlight Leveling Motor RH Communication Malfunction |
AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| B124D | Lost Communication with AFS LIN |
| B2410 | Headlight Swivel Motor LH Communication Malfunction |
| B2411 | Headlight Swivel Motor RH Communication Malfunction |
| B2432 | Lost Communication with Automatic High Beam Sensor |
CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| B2785 | Communication Malfunction between ECUs Connected by LIN |
| B2786 | No Response from Steering Lock ECU |
| B2789 | No Response from ID BOX |
| B278C | Lost Communication with Power Source Control |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.