What is a Mitsubishi Lancer Evolution X airbag control unit?
The Mitsubishi Lancer Evolution X airbag control unit is the central safety unit that precisely controls and monitors all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of an accident. It processes sensor data at lightning speed, stores important crash information, and is crucial for the safety of vehicle occupants.
This component, often referred to as the SRS module, is specifically designed for the Mitsubishi Lancer Evolution X (model code CZ4A) from 2008 to 2015. It receives signals from impact sensors and triggers the appropriate safety measures when necessary.
The control unit is continuously connected to the vehicle's electronics and communicates with the individual airbag modules in the vehicle interior via yellow-marked airbag connectors. This ensures reliable and safe operation of the entire restraint system.
Why is the Mitsubishi Lancer Evolution X airbag control unit defective?
A Mitsubishi Lancer Evolution X airbag control unit often fails because it stores crash data after an accident, necessitating a reset or replacement, or because of internal communication errors, short circuits in the circuits, or age-related failure. These problems cause the airbag warning light to illuminate and impair system function.
A control unit often fails after a vehicle collision, even if no airbags are deployed. Crash data stored in memory blocks the system, requiring special repair or replacement of the module.
Another possible cause of failure could be internal electronic faults, such as those indicated by error code B1000 (control unit communication error). Problems with connected components, such as a short circuit in the passenger airbag indicator circuit (B1207), can also affect the control unit.
Defects in the driver's airbag slip ring or the squib can also lead to an error (e.g., B1402), although this doesn't necessarily indicate a faulty control unit. However, the control unit registers these malfunctions and signals the need for repair. A professional diagnosis at a workshop is essential in this case.
Common error codes for Mitsubishi Lancer Evolution X airbag control unit repair
During a Mitsubishi Lancer Evolution X airbag control unit repair, specific error codes are read out that indicate system malfunctions, such as communication errors within the control unit itself (B1000), short circuits in the displays (B1207), or problems with the airbag squib (B1402). A precise diagnosis is crucial for successful repair.
- **B1000**: **Control Unit Communication Error** → Indicates problems with the airbag control unit's internal communication or the connection to the diagnostic tool.
- **B1207**: **Passenger Airbag Indicator Circuit Shorted** → A short circuit in the passenger airbag indicator circuit requires inspection of the wiring or the indicator module.
- **B1208**: **LCD Heater (for Airbag Element Display)** → This code indicates a fault in the airbag status display heater circuit, which may affect the display.
- **B1309**: **Timeout Error (5-Bow Up)** → A timeout error at certain sensor positions may indicate wiring or control unit problems.
- **B1402**: **Driver Airbag Slip Ring/Squib Grounding Error** → A defect in the driver airbag squib or slip ring will cause the airbag to malfunction and must be repaired.
These manufacturer-specific B-codes are crucial for the correct diagnosis and repair of the airbag system. Correcting these errors is essential for vehicle safety and should be performed by qualified personnel.
What part numbers are available for the Mitsubishi Lancer Evolution X airbag control unit repair?
For the Mitsubishi Lancer Evolution X airbag control unit repair, no exact OEM part number for the control unit itself could be validated in publicly available sources. The frequently cited numbers such as 8651A143, 8651A002, and 8651A178 instead refer exclusively to front impact airbag sensors, not the control unit itself.
Identifying the correct airbag control unit for the Evo X is complex. While specific part numbers like those listed exist for airbag sensors, the control unit's OEM number often remains unlisted in general catalogs.
Mitsubishi Lancer Evolution X airbag control units vary depending on the model year and equipment. For precise identification during repair or replacement, it is strongly recommended to request the vehicle identification number (VIN) directly from a Mitsubishi dealer or via specialized TecDoc/TecAlliance databases.
This is the most reliable way to ensure the exact fit and compatibility of the airbag control unit and prevent further errors or failures. Without the correct part number, a professional repair cannot be performed.