2006 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Retractable Hardtop System DTCS

RETRACTABLE HARDTOP SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DTC Description
DTC B2501 SHORT IN ROOF DRIVE MOTOR RH CIRCUIT
DTC B2502 OPEN IN ROOF DRIVE MOTOR RH CIRCUIT
DTC B2503 SHORT IN ROOF DRIVE MOTOR LH CIRCUIT
DTC B2504 OPEN IN ROOF DRIVE MOTOR LH CIRCUIT
DTC B2505 SHORT IN LUGGAGE DOOR DRIVE MOTOR RH CIRCUIT
DTC B2506 OPEN IN LUGGAGE DOOR DRIVE MOTOR RH CIRCUIT
DTC B2507 SHORT IN LUGGAGE DOOR DRIVE MOTOR LH CIRCUIT
DTC B2508 OPEN IN LUGGAGE DOOR DRIVE MOTOR LH CIRCUIT
DTC B2509 SHORT IN PULSE WIDTH MODULATION MOTOR RH CIRCUIT
DTC B2510 SHORT IN PULSE WIDTH MODULATION MOTOR LH CIRCUIT
DTC B2511 OPEN IN ROOF LOCK MOTOR CIRCUIT
DTC B2512 SHORT IN LUGGAGE CLOSER MOTOR RH CIRCUIT
DTC B2513 OPEN IN LUGGAGE CLOSER MOTOR RH CIRCUIT
DTC B2514 SHORT IN LUGGAGE CLOSER MOTOR LH CIRCUIT
DTC B2515 OPEN IN LUGGAGE CLOSER MOTOR LH CIRCUIT
DTC B2516 OPEN IN QUARTER WINDOW MOTOR RH CIRCUIT
DTC B2517 OPEN IN QUARTER WINDOW MOTOR LH CIRCUIT
DTC B2518 OPEN IN PACKAGE TRAY MOTOR CIRCUIT
DTC B2520 ROOF LOCK SWITCH MALFUNCTION
DTC B2521 ROOF CLOSE SWITCH RH MALFUNCTION
DTC B2522 ROOF CLOSE SWITCH LH MALFUNCTION
DTC B2523 ROOF POSITION SWITCH NO. 1 MALFUNCTION
DTC B2524 ROOF POSITION SWITCH NO. 2 MALFUNCTION
DTC B2525 ROOF POSITION SWITCH NO. 3 MALFUNCTION
DTC B2526 ROOF POSITION SWITCH NO. 1, NO. 2 OR NO. 3 MALFUNCTION
DTC B2527 ROOF OPEN SWITCH MALFUNCTION
DTC B2528 LUGGAGE DOOR CLOSE SWITCH MALFUNCTION
DTC B2529 LUGGAGE FRONT LOCK SWITCH RH MALFUNCTION
DTC B2530 LUGGAGE FRONT LOCK SWITCH LH MALFUNCTION
DTC B2531 LUGGAGE DOOR OPEN SWITCH MALFUNCTION
DTC B2532 PACKAGE TRAY SWITCH NO. 1 MALFUNCTION
DTC B2533 PACKAGE TRAY SWITCH NO. 2 MALFUNCTION
DTC B2534 PACKAGE TRAY SWITCH NO. 1 OR NO. 2 MALFUNCTION
DTC B2535 TONNEAU COVER SWITCH MALFUNCTION
DTC B2536 LUGGAGE COURTESY SWITCH MALFUNCTION
DTC B2537 ROOF CONTROL SWITCH MALFUNCTION
DTC B2538 ABNORMAL ROOF DRIVE MOTOR RH PULSE
DTC B2539 ABNORMAL ROOF DRIVE MOTOR LH PULSE
DTC B2540 ABNORMAL DIFFERENCE BETWEEN RH AND LH ROOF DRIVE MOTOR PULSE
DTC B2541 ABNORMAL LUGGAGE DOOR DRIVE MOTOR RH PULSE
DTC B2542 ABNORMAL LUGGAGE DOOR DRIVE MOTOR LH PULSE
DTC B2543 ABNORMAL DIFFERENCE BETWEEN RH AND LH LUGGAGE DOOR DRIVE MOTOR PULSE
DTC B2544 TRANSPONDER KEY ECU COMMUNICATION STOP
DTC B2545 ECM COMMUNICATION STOP
DTC B2546 COMBINATION METER ECU COMMUNICATION STOP
DTC B2547 LUGGAGE ROOM J/B ECU COMMUNICATION STOP
DTC B2548 DRIVER SIDE J/B ECU COMMUNICATION STOP
DTC B2549 DRIVER DOOR ECU COMMUNICATION STOP
DTC B2550 PASSENGER DOOR ECU COMMUNICATION STOP
DTC B2551 PULSE WIDTH MODULATION MOTOR RH POWER SUPPLY CIRCUIT MALFUNCTION
DTC B2552 PULSE WIDTH MODULATION MOTOR LH POWER SUPPLY CIRCUIT MALFUNCTION
DTC B2553 SLIDING ROOF CONTROL ECU MALFUNCTION
DTC B2554 RETRACTABLE HARDTOP SYSTEM MALFUNCTION
DTC B2555 A/C ECU COMMUNICATION STOP
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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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