SRS Connectors

1. SRS CONNECTORS

HINT: SRS connectors are located as shown in the provided illustration.

(a) All connectors, except seat position airbag sensor connector and occupant classification ECU connector, in the SRS are colored in yellow to distinguish them from other connectors. The connectors having special functions and specifically designed for the SRS are used in the locations shown on the previous page 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 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 to the extent 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 assy 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 or side.





2. DISCONNECTION OF CONNECTORS FOR CURTAIN SHIELD AIRBAG ASSY, HORN BUTTON ASSY AND FRONT PASSENGER AIRBAG ASSY
(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.





3. CONNECTION OF CONNECTORS FOR CURTAIN SHIELD AIRBAG ASSY, HORN BUTTON ASSY AND FRONT PASSENGER AIRBAG ASSY
(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.)





4. DISCONNECTION OF CONNECTOR FOR FRONT SEAT AIRBAG ASSY
(a) Place a finger on the slider.
(b) Slide the slider to release lock.
(c) Disconnect the connector.





5. CONNECTION OF CONNECTOR FOR FRONT SEAT AIRBAG ASSY
(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 them, the slider slides. Be sure not to touch the slider while connecting, as it may result in an insecure fit.

6. DISCONNECTION OF CONNECTOR FOR AIRBAG SENSOR ASSY 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 lance fittings 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.





7. CONNECTION OF CONNECTOR FOR AIRBAG SENSOR ASSY 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 connected. Holding the holder when connecting may result in an insecure connection.

8. DISCONNECTION OF CONNECTORS FOR AIRBAG FRONT SENSOR, SIDE AIRBAG SENSOR AND AIR- BAG 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. If the top and bottom sides are held, it will obstruct disconnection.





9. CONNECTION OF CONNECTORS FOR AIRBAG FRONT SENSOR, SIDE AIRBAG SENSOR 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 them, the outer slides. Be sure not to hold the outer while connecting, as it may result in an insecure fit.





10. NOTICE REGARDING AIRBAG SENSOR INSTALLATION BOLT
(a) As the tightening torque is different depending on the property class of the airbag sensor installation bolt, choose a bolt referring to the following illustration and tighten with the specified tightening torque written in the repair manual.