SRS Connectors
SRS CONNECTORS
HINT: SRS connectors are located as shown in the illustration.
a. All connectors in the SRS are colored yellow to distinguish them from other connectors, except the seat position airbag sensor connector and the occupant classification ECU connector. Some connectors have special functions, and are specially designed for the SRS. These connectors use durable gold-plated terminals, and are placed in the locations shown above to ensure high reliability.
1. Terminal twin-lock mechanism:
Each connector has a two-piece component consisting of a housing and a spacer. This design enables the terminal to be locked securely by two locking devices (the retainer and the lance) to prevent terminals from coming out.
2. Activation prevention mechanism:
Each connector contains a short spring plate. When the connector is disconnected, the short spring plate automatically connects the positive (+) terminal and the negative (-) terminal of the squib.
3. Half connection prevention mechanism:
If the connector is not completely connected, the connector is disconnected due to the spring operation so that no continuity exists.
4. Connector lock mechanism (1):
Locking the connector lock button connects the connector securely.
5. Connector lock mechanism (2):
Both the primary lock with holder lances and the secondary lock with retainer prevent the connectors from becoming disconnected.
6. Improper connection prevention lock mechanism:
When connecting the holder, the lever is pushed into the end by rotating around the A axis to lock the holder securely.
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. The 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 the safing sensor and the deceleration sensor go on simultaneously. When a deceleration force acts on the sensors, 2 squibs in the driver airbag and front passenger airbag ignite and generate gas. The gas discharging into the driver airbag and front passenger airbag rapidly increases the pressure inside the bags, breaking the horn button assembly and instrument panel. The deployment of the bags then ends, and the bags deflate as the gas is discharged through discharge holes at the bag's rear.
DISCONNECTION OF CONNECTORS FOR HORN BUTTON ASSEMBLY AND CURTAIN SHIELD AIR-BAG ASSEMBLY
a. Release the lock button (yellow part) of the connector using a screwdriver.
b. Insert the screwdriver tip between the connector and the base, and then raise the connector.
CONNECTION OF CONNECTORS FOR HORN BUTTON ASSEMBLY AND CURTAIN SHIELD AIRBAG ASSEMBLY
a. Connect the connector.
b. Push down securely on the lock button (yellow part) of the connector. (When locking, a click sound can be heard.)
DISCONNECTION OF CONNECTOR FOR FRONT SEAT AIRBAG ASSEMBLY
a. Place a finger on the slider, slide the slider to release the lock, and then disconnect the connector.
CONNECTION OF CONNECTOR FOR FRONT SEAT AIRBAG ASSEMBLY
a. Connect the connector as shown in the illustration. (When locking, make sure that the slider returns to its original position and a click sound can be heard.)
HINT: When connecting, the slider will slide. Be sure not to touch the slider while connecting, as it may result in an insecure fit.
DISCONNECTION OF CONNECTOR FOR INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY
a. Place a finger on the slider, slide the slider to release the lock, and then disconnect the connector.
CONNECTION OF CONNECTOR FOR INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY
a. Connect the connector as shown in the illustration. (When locking, make sure that the slider returns to its original position and a click sound can be heard.)
HINT: When connecting, the slider will slide. Be sure not to touch the slider while connecting, as it may result in an insecure fit.
DISCONNECTION OF CONNECTOR FOR AIRBAG SENSOR ASSEMBLY CENTER
a. Pull the lever by pushing part A as shown in the illustration and disconnect the holder (with connectors).
HINT: Perform the following procedures when replacing the holder.
b. Remove the holder.
1. Using a screwdriver, unlock the retainer.
2. Release the fitting lances and remove the holder.
c. Install the holder.
1. Install the connectors to the holder. (When locking, a click sound can be heard.)
HINT: The retainer is locked when the holder is connected.
CONNECTION OF CONNECTOR FOR AIRBAG SENSOR ASSEMBLY CENTER
a. Firmly insert the holder (with connectors) until it can not be pushed any further.
b. Push the lever to connect the holder (with connectors). (When locking, a click sound can be heard.)
HINT: The holder slides when connecting. Holding the holder when connecting may result in an insecure connection.
DISCONNECTION OF CONNECTORS FOR AIRBAG SENSOR FRONT, SIDE AIRBAG SENSOR ASSEMBLY AND AIRBAG SENSOR REAR
a. While holding both outer flank sides, slide the outer in the direction shown by the arrow.
b. When the connector lock is released, the connectors are disconnected.
HINT: Be sure to hold both outer flank sides. Holding the top and bottom sides will make disconnection difficult.
CONNECTION OF CONNECTORS FOR AIRBAG SENSOR FRONT, SIDE AIRBAG SENSOR ASSEMBLY AND AIRBAG SENSOR REAR
a. Connect the connector as shown in the illustration. (When locking, make sure that the outer returns to its original position and a click sound can be heard.)
HINT: When connecting, the outer will slide. Be sure not to hold the outer while connecting, as it may result in an insecure fit.