Airbag control unit with part number 152300-7180

What is the function of the airbag control unit 152300-7180?

The airbag control unit with part number 152300-7180 is the central control module of the safety system in the Daihatsu Terios J100. Its vital task is to evaluate signals from the acceleration sensors and, in the event of a crash, to precisely deploy the airbags and tighten the seat belts to protect the occupants.

As the brain of the passive restraint system, this component continuously monitors data from the crash sensors distributed throughout the vehicle. Its primary role is to distinguish an actual accident situation from everyday driving maneuvers such as hard braking or running over obstacles.

Once predefined thresholds for negative acceleration are exceeded, the control unit sends ignition pulses to the pyrotechnic inflators within milliseconds, triggering the deployment of the airbags and the tightening of the seat belts.

In addition, the system performs a self‑check each time the vehicle is started. The brief illumination followed by extinguishing of the airbag warning light on the dashboard indicates that the entire system is functioning properly.

Why does the control unit 152300-7180 fail?

The most common cause of failure for the control unit 152300-7180 is the storage of crash data after an accident, which results in the system being locked out. Other defects arise from water damage leading to corrosion and short circuits, as well as general electronic malfunctions of internal components.

After an accident—even one involving low impact energy—crash data is permanently stored in the control unit’s internal memory. This lockout is a manufacturer‑imposed safety measure that mandates a system check and prevents the vehicle from operating with a potentially compromised safety system.

A further frequent cause of damage is moisture ingress. Depending on the installation location within the vehicle, leaks or condensation can lead to water damage, causing corrosion on the circuit board, damaged solder joints, and electrical short circuits.

General electronic faults may also occur. Components such as processors, memory chips, or capacitors can fail over time due to aging or thermal stress, resulting in internal errors and deactivation of the airbag system.

How do you recognize a defect in the 152300-7180?

A defect in the airbag control unit 152300-7180 primarily manifests as a constantly illuminated or intermittently flashing airbag warning light on the instrument panel. This indicates that the passive safety system is not operational and would not deploy in the event of a crash.

The clearest symptom is the persistently lit SRS warning light (Supplemental Restraint System). Normally, this light goes out within seconds after starting the engine. If it remains on, there is a fault in the system, and the control unit has deactivated itself for safety reasons.

In some cases, the warning light may flicker or flash irregularly. This often points to a loose connection in the wiring harness or an emerging defect in an internal component that has not yet become permanent.

Regardless of how the light behaves, an active warning light always means that neither the airbags nor the seat belt pretensioners will deploy in an emergency. Prompt diagnosis and repair are therefore essential for safety reasons.

In which vehicles is the control unit 152300-7180 installed?

The airbag control unit with part number 152300-7180 is specifically used in vehicles manufactured by Daihatsu. At Airbag24, this control unit is offered for repair on first‑generation Daihatsu Terios models (J100) produced between 1997 and 2006.

At Airbag24, professional repair of this control unit is specified for the following vehicle model:

Daihatsu Terios (J100 series, model years 1997–2006)

How does the repair of the 152300-7180 proceed at Airbag24?

At Airbag24, the control unit 152300-7180 undergoes a professional repair process. Following a thorough incoming inspection and fault diagnosis, stored crash data is erased, and all electronic components and connections are checked. 2 years’ statutory liability for defects is provided on the proper restoration of the unit.

Upon receipt of the removed control unit at Airbag24, it is first connected to specialized test benches. Technicians read the fault memory to determine the exact cause of the defect—for example, to confirm whether crash data is still stored.

The core of the repair process involves completely and safely erasing the locked crash data from memory using specialized software and hardware. In approximately 95% of cases, this reset is performed via the OBD‑2 interface. At the same time, all relevant connections and components on the circuit board are thoroughly inspected.

Following this, a comprehensive functional test is carried out to ensure that the control unit operates flawlessly again and is fully communication‑capable. The repair represents a cost‑effective alternative to an expensive new part and comes with 2 years’ statutory liability for defects.