B1497 airbag control unit fault

What does error code B1497 mean in the airbag control unit?

Error code B1497 indicates a specific, internal fault within the airbag control unit (SRS module). Typically, this code points to a serious hardware issue, such as a short circuit on the circuit board, defective electronic components, or a critical memory error. As a result, the control unit can no longer reliably perform its safety‑critical functions.

Technically speaking, this means that the control unit’s self‑diagnostic system has detected an anomaly in its own circuitry or memory modules. This malfunction prevents proper processing of sensor data and reliable activation of airbags and seatbelt pretensioners in the event of a crash.

Due to the safety‑critical nature of this fault, the entire restraint system is deactivated as a precautionary measure, indicated by the permanently illuminated warning light in the cockpit.

How do you recognize error B1497?

The most obvious symptom of error B1497 is the continuously lit or flashing airbag warning light (SRS light) in the instrument cluster. This signals a severe malfunction and deactivation of the airbag system. In an actual accident, airbags will not deploy.

The warning light does not extinguish even after restarting the vehicle, as the fault remains permanently stored in the control unit’s fault memory.

In some cases, the airbag control unit may stop responding to diagnostic requests via the OBD2 interface. Attempts to establish a connection fail, complicating troubleshooting at the workshop and directly indicating an internal defect within the module.

What causes B1497?

The primary cause of error code B1497 is an internal hardware failure in the airbag control unit. This often includes short circuits caused by moisture, aging-related component failures—such as capacitors or resistors—or damaged traces on the circuit board. External factors, like a faulty seat occupancy sensor, can also trigger this error.

Common triggers include defective sensors, such as crash sensors or seat occupancy sensors, whose erroneous signals overload the control unit or push it into an error state.

Additionally, damaged or corroded connectors and broken cables in the wiring leading to the control unit can produce implausible readings and secondarily provoke the internal B1497 fault.

Although code B1497 refers specifically to the control unit itself, it can occur in conjunction with other faults, including B14 (short circuit in the primary crash sensor), B1234 (faulty seat occupancy sensor), B1900 (airbag contact error), or the general control unit fault code B2295.

Which models experience error B1497?

Error code B1497 frequently occurs in certain Mitsubishi vehicles that use identical or similar airbag control units. The Pajero, Montero, and Shogun model lines across multiple generations are particularly affected. Repairing the unit here is a proven alternative to replacing it with a new part.

At Airbag24, we professionally repair error code B1497 for the following models and series:

Mitsubishi Pajero V80 (2007–2012) and V80 Facelift (2012–2021)

Mitsubishi Pajero V90 (2007–2012) and V90 Facelift (2012–2021)

Mitsubishi Montero V40

Mitsubishi Shogun V20

Mitsubishi Shogun V80

How is error B1497 professionally repaired?

Professional repair of error B1497 focuses on restoring the original airbag control unit. Upon submission, the device undergoes a detailed analysis, examining the circuit board and all electronic components. Defective parts are expertly replaced, and any stored crash data is erased.

The repair process at Airbag24 follows a standardized, safety‑oriented procedure. First, the fault memory is read to confirm error B1497 and any accompanying faults.

This is followed by a visual inspection of the hardware for corrosion, short circuits, or other damage. At the heart of the repair lies the replacement of faulty components, such as capacitors, resistors, or integrated circuits (ICs) on the circuit board.

After hardware restoration, the device’s software is reset, and any previously saved crash data is completely removed. A final functional test ensures the control unit operates flawlessly again and that the airbag warning light goes out after installation. All repairs come with 2 years' statutory liability for defects.