Toyota Highlander manuals

Toyota Highlander Service Manual: Precaution

CAUTION:

NOTICE:

1. SRS CONNECTORS

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

SRS CONNECTORS


(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 on the previous page to ensure high reliability.

SRS CONNECTORS


  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.

SRS CONNECTORS


SRS CONNECTORS


  1. Electrical connection check mechanism: This mechanism electrically checks that the 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


  1. 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.

SRS CONNECTORS


SRS CONNECTORS


  1. Connector lock mechanism: Locking the connector lock button connects the connector securely.

SRS CONNECTORS


(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 HORN BUTTON ASSY AND CURTAIN SHIELD 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.

 DISCONNECTION OF CONNECTORS FOR HORN BUTTON ASSY AND CURTAIN SHIELD AIRBAG ASSY


3. CONNECTION OF CONNECTORS FOR HORN BUTTON ASSY AND CURTAIN SHIELD 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.)

CONNECTION OF CONNECTORS FOR HORN BUTTON ASSY AND CURTAIN SHIELD AIRBAG ASSY


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.

DISCONNECTION OF CONNECTOR FOR FRONT SEAT AIRBAG ASSY


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, the slider will slide. Be sure not to touch the slider while connecting, as it may result in an insecure fit.

CONNECTION OF CONNECTOR FOR FRONT SEAT AIRBAG ASSY


6. DISCONNECTION OF CONNECTOR FOR FRONT PASSENGER AIRBAG ASSY

(a) Place a finger on the slider.

(b) Slide the slider to release lock.

(c) Disconnect the connector.

DISCONNECTION OF CONNECTOR FOR FRONT PASSENGER AIRBAG ASSY


7. CONNECTION OF CONNECTOR FOR FRONT PASSENGER 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, the slider will slide. Be sure not to touch the slider while connecting, as it may result in an insecure fit.

CONNECTION OF CONNECTOR FOR FRONT PASSENGER AIRBAG ASSY


8. DISCONNECTION OF CONNECTORS FOR AIRBAG FRONT SENSOR, SIDE AIRBAG SENSOR AND AIRBAG SENSOR REAR

DISCONNECTION OF CONNECTORS FOR AIRBAG FRONT SENSOR, SIDE AIRBAG SENSOR 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.

DISCONNECTION OF CONNECTORS FOR AIRBAG FRONT SENSOR, SIDE AIRBAG SENSOR AND AIRBAG SENSOR REAR


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, the outer will slide. Be sure not to hold the outer while connecting, as it may result in an insecure fit.

 CONNECTION OF CONNECTORS FOR AIRBAG FRONT SENSOR, SIDE AIRBAG SENSOR AND AIRBAG SENSOR REAR


Replacement
1. REMOVE INSTRUMENT CLUSTER FINISH PANEL SUB-ASSY CENTER (SEE PAGE 71-10 ) 2. REMOVE MULTI-DISPLA Y (CRT DISPLAY) DISPLAY (SEE PAGE 71-10 ) 3. REMOVE FRONT SEAT ARMREST ASSY CENTER (SEE PAGE 71-1 ...

On-vehicle inspection
CAUTION: Be sure to perform the initialization of the occupant classification ECU if any of the following conditions occur (see page 05-1207 ). If the initialization is not performed, the SRS may ...

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