SRS Connectors

a. All connectors in the SRS are colored yellow to distinguish them from other connectors. Connectors having special functions and specifically designed for the SRS are used in the locations shown above to ensure high reliability. These connectors use durable gold-plated terminals.




1. Terminal Twin-Lock Mechanism
Each connector has a two-piece component consisting of a housing and a spacer. This design secures the locking of the terminal by two locking devices (the retainer and the lance) to prevent terminals from coming out.




2. Airbag Activation Prevention Mechanism
Each connector contains a short spring plate. When the connector is disconnected, the short spring plate automatically connects the power source and grounding terminals of the squib.

HINT: The illustration above shows connectors "2", "3" and "4".

Electrical Connection Check Connector Illustration:

3. Electrical Connection Check Mechanism
This mechanism electrically checks if connectors are connected correctly and completely. The electrical connection check mechanism is designed so that the disconnection detection pin connects with the diagnosis terminals when the connector housing lock is locked.

SRS Connectors:

4. Connector Twin-Lock Mechanism
With this mechanism connectors (male and female connectors) are locked by 2 locking devices to increase the connection reliability. If the primary lock is incomplete, ribs interfere and prevent the secondary lock.

Figure 1 And 2:

b. When the vehicle is involved in a frontal collision in the hatched area (Fig. 1) and the shock is larger than the predetermined level, the SRS is activated automatically. A safing sensor is designed to go on at a smaller deceleration rate than the airbag sensor. As illustrated in Fig. 2, ignition is caused when current flows to the squib, which happens when a safing sensor and the airbag sensor go on simultaneously. When deceleration force acts on the sensors, squib in the driver airbag ignite and generate gas. The gas discharging into the driver airbag rapidly increases the pressure inside the bags, breaking open the steering wheel pad.
Bag inflation then ends, and the bags deflate as the gas is discharged through discharge holes at the bag's rear or side.