What is a Chevrolet Impala 2nd Gen airbag control module?
The Chevrolet Impala 2nd Gen airbag control unit is the central safety unit that activates all occupant restraint systems in the event of an accident. It monitors crash sensors, stores relevant event data, and ensures the proper functioning of all airbag modules and seatbelt pretensioners in the vehicle.
This module, also known as the Sensing Diagnostic Module (SDM), plays a crucial role in passive safety. It receives signals from various sensors to accurately detect the severity and type of impact.
Its main task is to control the deployment of the airbag, which significantly increases the safety of the occupants in the event of an accident.
Why is the Chevrolet Impala 2nd Gen airbag control module defective?
The Chevrolet Impala 2nd Gen airbag control unit can malfunction due to internal components failing due to aging or moisture, crash data being permanently stored after an accident, or software errors. These conditions can activate the airbag warning light and necessitate a Chevrolet Impala 2nd Gen airbag control unit repair.
Often the cause is an internal memory error that occurs after a crash and prevents the module from functioning correctly.
Voltage fluctuations or short circuits can also damage the control unit's electronics and cause a failure.
Common Error Codes for Chevrolet Impala 2nd Gen Airbag Control Unit Repair
For Chevrolet Impala 2nd Gen airbag control module repair, specific manufacturer-specific B-codes are crucial because they indicate internal SDM issues, such as communication or memory errors. These codes help accurately diagnose whether the airbag control module itself is faulty and requires repair.
- B1000 → Control unit communication error → Signals problems with data transmission within the airbag module.
- B1001 → Internal memory error in the control unit → Indicates a malfunction of the internal memory of the SDM.
- B1002 → Diagnostic loop interrupted → Indicates an interruption in the internal diagnostic circuit of the control unit.
- B1003 → Voltage fluctuation on the control unit → Indicates insufficient or unstable voltage supply to the module.
- B1010 → Airbag control unit self-test error → The SDM failed its internal self-test.
- B1011 → EEPROM memory error → An error in the non-volatile memory of the control unit, often after a crash.
- B1012 → Software Integrity Error → A problem with the airbag control module's internal software or firmware.
- B1015 → Internal hardware error → Indicates a defect in the physical components within the SDM.
- B1020 → Communication error with other modules → The airbag control unit cannot communicate correctly with other vehicle systems.
These B-codes focus exclusively on the airbag control module (SDM) and enable targeted troubleshooting.
They are essential for any professional diagnosis concerning the airbag system.
What part numbers are available for the Chevrolet Impala 2nd Gen airbag control unit repair?
For a Chevrolet Impala 2nd Gen airbag control unit repair, the most relevant OEM part numbers are 10305387 and 12204090. These GM numbers, often produced by suppliers like TRW, are specifically verified for the airbag control unit (SDM) of the Chevrolet Impala from model years 2000 to 2005 and guarantee compatibility.
Part number 10305387 is often listed as a genuine GM/TRW part number and is widely used.
The number 12204090 often serves as an OEM replacement or alternative number and is functionally identical.
It is important to note that there are no public supplier part numbers available from Bosch, Autoliv, or Siemens for this specific airbag control unit.