What is a Mitsubishi Lancer Evolution II airbag control unit?
The Mitsubishi Lancer Evolution II airbag control unit is the vehicle's central safety unit, activating all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of an accident. It precisely monitors sensor data, stores important crash information, and ensures the proper functioning of the entire safety system.
This main control unit continuously processes input signals from acceleration sensors and crash sensors in milliseconds. Upon impact, it triggers pyrotechnic units via electrical ignition pulses.
The system also performs self-diagnosis to detect faults in the airbag circuit. If malfunctions occur, the airbag warning light on the dashboard is activated, requiring timely diagnosis.
Why is the Mitsubishi Lancer Evolution II airbag control unit defective?
A Mitsubishi Lancer Evolution II airbag control unit often fails when it deploys after an accident and sustains internal damage, or stores crash data that requires a professional reset. Electrical short circuits, age-related wear and tear of internal components, or communication errors can also impair its function and activate the airbag warning light.
After an airbag is deployed, the control unit stores accident-relevant data and usually needs to be repaired or replaced. Subsequent reprogramming or a professional reset of the module is then essential.
In addition to crashes, internal components can fail due to aging or moisture. Defects in the electrical circuit or poor solder joints can also lead to system failures.
Communication errors with other vehicle modules or sensors can also cause the airbag control unit to report a fault. This requires a comprehensive diagnosis to determine the exact cause and perform the Mitsubishi Lancer Evolution II airbag control unit repair.
Common error codes for Mitsubishi Lancer Evolution II airbag control unit repair
During Mitsubishi Lancer Evolution II airbag control unit repairs, specific error codes provide information about the cause of the malfunction directly within the control unit. These codes help specialists specifically diagnose problems such as communication failures, short circuits, or sensor faults without confusing them with other system components.
- B22 → Clock Spring Error → Problem with the steering wheel contact ring or its connection to the control unit.
- B25 → Passenger side airbag connection missing or open → Open circuit in the circuit of the passenger airbag or the associated module.
- B1000 → Control unit communication error → General malfunction of the internal communication of the airbag control unit or the vehicle bus.
- B1207 → Passenger airbag indicator circuit short circuit → Short circuit in the signal path of the passenger side airbag indicator, often due to contact problems.
- B1402 → Driver side airbag squib ground (short circuit) or clockspring error → Short circuit in the driver airbag deployment circuit or error in the steering wheel contact ring.
What part numbers are available for the Mitsubishi Lancer Evolution II airbag control unit repair?
For Mitsubishi Lancer Evolution II airbag control unit repairs, only exact OEM part numbers are relevant to ensure compatibility with models from 1994 to 1995. Finding and validating these numbers is crucial for a successful repair or correct replacement of the control unit.
- 21005-AM001
- 21005-AM003
- 21005-AM004
- 21005-AM005
These numbers are from the 21005-AMxxx series and have been verified multiple times as genuine spare parts for the Evo II airbag control unit. The variants (AM001 to AM005) indicate compatible genuine parts.
It's important to note that other part numbers, such as MR472773, are for other Lancer models or years of manufacture and are not relevant for the Evolution II. The numbers listed here are proven original spare parts. These are also available from specialized aftermarket shops.