Trigger Logic

TRIGGER LOGIC








The design of the system now allows the ZAE control module to trigger the components individually as they are needed. This logic is based on:
- the severity of the impact,
- the status of the front passenger's seat (occupied/un-occupied),
- the status of the seatbelt contacts of the driver's and passenger's seat

These triggering parameters change the sequence and deployment time of the components. This trigger logic ensures the level of driver/passenger's safety while reducing the cost of replacing un-necessarily deployed components.

AIRBAG DEPLOYMENT

The deployment threshold for the driver's side airbag is programmed in the ZAE control module. The driver's side airbag will not deploy with minor impact forces where the seatbelt is sufficient to protect the driver. If the seatbelt is not connected, the airbag will deploy to provide the driver with protection.

The passenger's side airbag is also dependent on seat belt use for deployment. In addition, the ZAE looks at the input signal from the SBE to determine deployment. If the passengers seat is unoccupied, the passenger's side airbag will not deploy unless a sever collision occurs.

The triggering of the pyrotechnic seatbelt tensioners is dependent on the seatbelt contacts. The seatbelt tensioners will not deploy if the seatbelts are not connected.

The safety logic of the ZAE will deploy the airbags in an accident, if faults are detected with the SBE or seatbelt contacts.

DIAGNOSIS/TROUBLESHOOTING

Replacement ZAE modules must be coded when installed in the vehicle.

Diagnosis is carried out with the DIS tester. The diagnosis of the ZAE system is fault driven which is similar to the former SRS system.