What is a Lexus CT CT200h airbag control unit?
The Lexus CT CT200h airbag control unit is the central electronic control unit (ECU) of the occupant restraint system (SRS). It continuously monitors all relevant sensors, processes impact information in milliseconds, and precisely activates the airbags and seatbelt pretensioners as needed to ensure maximum occupant safety in the event of an accident.
This module is crucial for the vehicle's passive safety. It stores important crash data and error logs, which are essential for diagnostics.
The control unit is seamlessly integrated into the 12-volt electrical system of the Lexus CT200h.
Why is the Lexus CT CT200h airbag control unit defective?
A Lexus CT CT200h airbag control unit often fails because it stores crash data after an accident, requiring a reset or repair. Internal electronic errors, such as a faulty memory chip or circuit board, as well as communication problems with other vehicle systems, can also cause failure, causing the airbag warning light to illuminate.
After a collision, the control unit often locks itself to prevent accidental activation. This is a safety measure that requires replacing or resetting the module.
Age, moisture, or voltage fluctuations can also damage internal components, leading to malfunctions or complete system failure.
In rare cases, a failure can also be caused by defective wiring or poor connectors that disrupt the control unit's communication.
Common error codes for Lexus CT CT200h airbag control unit repair
During a Lexus CT CT200h airbag control unit repair, certain B-codes directly indicate problems within the airbag ECU. These error codes signal internal malfunctions or communication failures within the module itself, not the connected sensors or airbags.
- B1000 → Airbag control unit communication error → Interruption of data transmission between ECU and other systems.
- B1015 → Airbag control module error (internal error) → Internal defect or malfunction of the module's hardware or software.
- B107E → Airbag control unit error (specific module error) → Specific internal error in a part of the control unit module.
- B1139 → Airbag control module error (internal monitoring) → A problem with the self-monitoring function or internal circuits.
These error codes are critical for diagnosing a faulty control unit. A precise analysis requires specialized diagnostic equipment.
What part numbers are available for the Lexus CT CT200h airbag control unit repair?
For the Lexus CT CT200h airbag control unit repair, there are several specific OEM part numbers that ensure the module's compatibility with the vehicle model. These numbers may vary slightly depending on the year and trim level, but always refer to the original Lexus airbag control unit.
The most common and verified OEM part numbers for the Lexus CT200h airbag control unit are:
- 89170-76220
- 8917076220
- 89170-76020
- 8917076020
- 89170-76210
- 8917076210
- 8917076170
These part numbers are listed directly by Lexus as genuine parts and guarantee OEM quality for your Lexus CT200h.
When repairing the Lexus CT CT200h airbag control unit, it is crucial to use the exact part number to ensure the proper functioning of the safety system.