What is a Toyota Land Cruiser Heritage Edition airbag control unit?
The Toyota Land Cruiser Heritage Edition airbag control unit is your vehicle's central safety unit, essential in the event of a collision. It continuously monitors sensors, interprets crash data, and precisely activates all occupant restraint systems, including the various airbags and seatbelt pretensioners, to ensure optimal passenger safety.
This control unit, also called the SRS module, receives signals from acceleration and crash sensors throughout the vehicle. It is designed to react to critical situations in a fraction of a second.
The system is an integral part of the Land Cruiser Heritage Edition's comprehensive safety concept. It coordinates up to 10 airbags, adapted to the vehicle's demanding driving profile.
After a fault is triggered or a malfunction occurs, the control unit stores relevant error codes. These codes are crucial for precise diagnosis and subsequent troubleshooting.
Why is the Toyota Land Cruiser Heritage Edition airbag control unit defective?
The Toyota Land Cruiser Heritage Edition airbag control unit may be defective because it has stored crash data after an accident that requires a reset, or due to internal electronic errors that impair its function. Voltage fluctuations or water damage are other causes that may necessitate urgent Toyota Land Cruiser Heritage Edition airbag control unit repair.
A common reason for failure is the storage of crash data after an accident. This data blocks normal function and must be professionally reset.
Internal defects in the module's electronics can also lead to failure, often indicated by an illuminated airbag warning light. Such problems require specialized diagnosis and repair.
Sometimes power supply issues, such as overvoltage or undervoltage, can also damage the airbag control unit. A precise diagnosis is essential to identify the cause.
Water damage or corrosion are less common, but can irreparably damage the internal circuitry. In such cases, replacing the module is often unavoidable.
Common error codes for Toyota Land Cruiser Heritage Edition airbag control unit repair
Toyota Land Cruiser Heritage Edition airbag control unit repairs often result in specific B-codes that directly indicate problems with the control unit itself. These include communication errors, internal module defects, stored crash data, or voltage anomalies that require precise diagnosis.
- B1000 → Control unit communication error → Signal connection faulty or module defective.
- B1801 → Airbag control unit internal error → Module defective or malfunctioning.
- B1798 → Airbag control unit memory data error → Stored crash data blocks the system.
- B1633 → Airbag ECU voltage error → Problems with the power supply to the module.
- B1231 → Control unit initialization error → Module not started correctly or programming error.
These error codes are read by the vehicle's diagnostic software and provide information about the nature of the problem. Accurate interpretation is essential for successful airbag control unit repair.
It's important to note that these codes refer exclusively to the airbag control unit itself. Errors originating from sensors or seatbelt pretensioners are not covered here.
Professional diagnostic tools like Toyota Techstream are required to correctly read these manufacturer-specific B-codes. This ensures targeted troubleshooting in the workshop.
What part numbers are available for the Toyota Land Cruiser Heritage Edition airbag control unit repair?
For Toyota Land Cruiser Heritage Edition airbag control unit repairs, specific OEM part numbers are essential to ensure compatibility. Verified numbers include 89170-60150, 89170-60F00 (for newer models), and 89170-60540 (for earlier models), often supplemented by supplier codes such as 150300-2965.
- 89170-60150 (Toyota Genuine) – A broad part number for the airbag control module.
- 89170-60F00 (Toyota Original) – Specifically relevant for models from 2017 to 2020, matching the Heritage Edition timeframe.
- 89170-60540 (Toyota Original) – For older Land Cruiser models, circa 2009–2013, but also a genuine part.
- 150300-2965 (OEM Supplier Alternative) – A complementary number to 89170-60540, often from an OEM supplier such as Denso.
It is imperative that the part number of the defective control unit be precisely matched to the numbers listed here. Small deviations can lead to incompatibilities.
These part numbers have been verified by multiple independent sources and refer exclusively to the airbag control unit. Sensors or other components have their own numbers.
After replacement or repair, the new or repaired module must be programmed to the vehicle identification number (VIN). This ensures full functionality and security.
A professional service or specialized workshop can help you identify the correct part number and program the airbag control unit.