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.
2016 Lexus LS 600hFACTORY OEM SERVICE PROCEDURE
Lighting System
LIGHTING SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| B1244 | Light Sensor Circuit Malfunction |
| B124A*1 | Automatic High Beam Mirror |
| B124B*1 | Automatic High Beam System |
| B124C*1 | Automatic High Beam Camera |
| B124D*1 | Lost Communication with AFS LIN |
| B124E | Flasher Relay Circuit |
| B2402 | Transistor Relay Overload Malfunction |
| B2410 | Headlight Swivel Motor LH Communication Malfunction |
| B2411 | Headlight Swivel Motor RH Communication Malfunction |
| B2412 | Headlight Swivel Motor LH Malfunction |
| B2413 | Headlight Swivel Motor RH Malfunction |
| B2414 | Steering Position Sensor Malfunction |
| B2415 | Vehicle Speed Sensor Malfunction |
| B2416 | Height Control Sensor Malfunction |
| B2417 | Headlight Beam Level Control Motor LH Malfunction |
| B2418 | Headlight Beam Level Control Motor RH Malfunction |
| B241E*2 | Headlamp Shade Motor LH Circuit |
| B241F*2 | Headlamp Shade Motor RH Circuit |
| B2420*1 | AFS ECU Malfunction |
| B2420*2 | AHS ECU Malfunction (EEPROM) |
| B2424 | Headlight Leveling Motor LH Communication Malfunction |
| B2425 | Headlight Leveling Motor RH Communication Malfunction |
| B2427 | CAN Communication Malfunction |
| B2429 | Steering Wheel Position Undecided |
| B242A*2 | Variation Information Error |
| B242B*2 | Vehicle Control Information Malfunction |
| B2430*1 | LED Headlight LH Circuit Malfunction |
| B2431*1 | LED Headlight RH Circuit Malfunction |
| B2432*1 | Lost Communication with Automatic High Beam Sensor |
| B2435*2 | Camera Malfunction |
| B2436*2 | Inner Rear View Mirror Malfunction |
| B2437*2 | Camera High Temperature Malfunction |
| B2438*2 | Camera Detection Malfunction |
| B2439*2 | Headlamp LH Circuit |
| B243A*2 | Headlamp RH Circuit |
| B243B*2 | LED Wiring for High Beam LH Circuit |
| B243C*2 | LED Wiring for High Beam RH Circuit |
| B2440*2 | Lost Communication with AHS EDU LH Module |
| B2441*2 | Lost Communication with AHS EDU RH Module |
| B2442*2 | Lost Communication with Camera Module |
| B2454*2 | Camera Optic Axis Initialization Incomplete |
| B2461*1 | Vehicle Information not written in AHB ECU |
| B2470*2 | Camera Optic Axis Malfunction |
| B2471*2 | Camera Optic Axis Correction Malfunction |
| B2480*3 | Headlight Hi LH Circuit Transistor |
| B2481*3 | Headlight Hi RH Circuit Transistor |
| B2482 | Clearance Light Circuit Transistor |
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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