AIRBAG SYSTEM PRECAUTION

CAUTION:


  • The vehicle is equipped with a Supplemental Restraint System (SRS), which consists of a steering pad, instrument panel passenger airbag assembly, curtain shield airbag assembly*, front seat side airbag, lower No. 1 instrument panel airbag assembly, seat belt pretensioner, center airbag sensor assembly, front airbag sensor, side airbag sensor assembly and rear airbag sensor*. Failure to carry out service procedures in the correct sequence could cause SRS parts to unexpectedly deploy and possibly lead to serious injuries. Furthermore, if a mistake is made when servicing SRS parts, they may fail to operate when required. Before performing servicing (including installation/removal, inspection and replacement of parts), be sure to read the following precautions.

    *: w/ Curtain Shield Airbag

  • Before starting work, wait at least 90 seconds after the ignition switch is turned off and after the cable is disconnected from the negative (-) battery terminal (SRS parts are equipped with a backup power source. If work is started within 90 seconds of turning the ignition switch off and disconnecting the cable from the negative (-) battery terminal, SRS parts may deploy).

  • Do not expose SRS parts directly to hot air or flames.

Note


  • Malfunction symptoms of SRS parts are difficult to confirm. DTCs are the most important source of information when troubleshooting. During troubleshooting, always confirm DTCs before disconnecting the cable from the negative (-) battery terminal.

  • For minor collisions where SRS parts do not deploy, always inspect the SRS parts.

  • Before performing repairs, remove the airbag sensors if any kind of impact is likely to occur to an airbag sensor during repairs.

  • Never use SRS parts from another vehicle. When replacing SRS parts, replace them with new ones.

  • Never disassemble or attempt to repair SRS parts.

  • If an SRS part has been dropped, or if there are any cracks, dents or other defects in the case, bracket or connector, replace the SRS part with a new one.

  • Use an ohmmeter/voltmeter with high impedance (10 kΩ/V minimum) for troubleshooting the electrical circuits.

  • Information labels are attached to the periphery of SRS parts. Follow the cautions and instructions on the labels.

  • After work on the SRS is completed, perform the SRS warning light check Click here.

  • When the cable is disconnected from the negative (-) battery terminal, the memory settings of each system will be cleared. Because of this, be sure to write down the settings of each system before starting work. When work is finished, reset the settings of each system as before. Never use a backup power supply from outside the vehicle to avoid erasing the memory in a system.

  • If the vehicle is equipped with a mobile communication system, refer to the Precaution in the Introduction section.

  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work Click here.

Tech Tips


  • The type of ignition switch used on this model differs depending on the specifications of the vehicle. The expressions listed in the table below are used in this section.

    Expression Ignition Switch (position) Engine Switch (condition)
    Ignition Switch off Off Off
    Ignition Switch ON ON On (IG)
    Ignition Switch ACC ACC On (ACC)
    Engine Start START Start
  • In the airbag system, the center airbag sensor assembly, front airbag sensor LH and RH, side airbag sensor assembly LH and RH and rear airbag sensor LH and RH are collectively referred to as the airbag sensors.


  1. HANDLING PRECAUTIONS FOR AIRBAG SENSORS


    1. Before starting the following operations, wait for at least 90 seconds after disconnecting the cable from the negative (-) battery terminal:


      1. Replacement of the airbag sensors.

      2. Adjustment of the front/rear doors of the vehicle equipped with side airbags and curtain shield airbags (fitting adjustment).

    2. When connecting or disconnecting the airbag sensor connectors, ensure that each sensor is installed in the vehicle.

    3. Do not use airbag sensors which have been dropped during operation or transportation.

    4. Do not disassemble the airbag sensors.

  2. INSPECTION PROCEDURE FOR VEHICLE INVOLVED IN ACCIDENT


    1. When the airbag has not deployed, confirm the DTCs by checking the SRS warning light. If there is any malfunction in the SRS airbag system, perform troubleshooting.

    2. When any of the airbags have deployed, replace the airbag sensors and check the installation condition.

  3. SRS CONNECTORS


    1. SRS connectors are located as shown in the following illustration.

      A010LKME02
      A010IL7E01
      A010L9IE01
      Item Application
      Terminal Twin-lock Mechanism Connectors 2, 4, 5, 6, 7, 8, 10, 12, 14, 18, 20, 22, 23, 24, 26, 28, 31, 32, 34
      Activation Prevention Mechanism Connectors 5, 7, 23, 28, 31
      Half Connection Prevention Mechanism Connectors 2, 4, 5, 7, 9, 27, 32
      Connector Position Assurance Mechanism Connectors 18, 20, 22
      Connector Lock Mechanism (1) Connectors 10, 12, 14, 26, 30, 34
      Connector Lock Mechanism (2) Connectors 2, 4
      Improper Connection Prevention Lock Mechanism Connectors 1, 3
    2. A010HRVE13
      Text in Illustration
      *1 Spacer
      *2 Housing
      *3 Female
      *4 Male

      All connectors in the SRS, except the seat position sensor connector, are colored yellow to distinguish them from other connectors. These connectors have special functions, and are specially designed for the SRS. All SRS connectors use durable gold-plated terminals which are placed in the locations shown below to ensure high reliability.


      1. Terminal twin-lock mechanism:

        All connectors with a terminal twin-lock mechanism have 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:

        All connectors with an activation prevention mechanism contain a short spring plate. When these connectors are disconnected, the short spring plate creates a short circuit by automatically connecting the positive (+) and negative (-) terminals of the squib.

        A010K2JE05
      3. Half connection prevention mechanism:

        If the connector is not completely connected, the connector is disconnected due to the spring force so that no continuity exists.

        A010GI4E05
      4. Connector position assurance mechanism:

        Only when the housing lock (white part) is completely engaged, the CPA (yellow part) slides, which completes the connector engagement.

        A010IREE03
        Text in Illustration
        *1 Housing Lock (White Part) *2 CPA (Yellow Part)
      5. Connector lock mechanism (1):

        Locking the connector lock button connects the connector securely.

        A010IYGE07
        Text in Illustration
        *1 Claw *2 Groove
        *3 Lock Button - -
      6. Connector lock mechanism (2):

        Both the primary lock with holder lances and the secondary lock with retainer prevent the connectors from becoming disconnected.

        A010H2XE05
        Text in Illustration
        *1 Holder *2 Lance
        *3 Retainer - -
      7. Improper connection prevention lock mechanism:

        When connecting the holder, the lever is pushed into the lock position by rotating around the A axis to lock the holder securely.

        A010JZHE04
        Text in Illustration
        *1 Lever - -
  4. DISCONNECTION OF CONNECTORS FOR STEERING PAD, INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY (SQUIB SIDE), CURTAIN SHIELD AIRBAG ASSEMBLY, FRONT SEAT SIDE AIRBAG ASSEMBLY (SQUIB SIDE) AND FRONT SEAT OUTER BELT ASSEMBLY

    Tech Tips

    Tape the screwdriver tip before use.


    1. Release the lock button of the connector using a screwdriver.

    2. Insert the screwdriver tip between the connector and base, and then raise the connector.

      A010M20E14
      Text in Illustration
      *1 Lock Button *2 Tape
      *3 Mark - -
  5. CONNECTION OF CONNECTORS FOR STEERING PAD, INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY (SQUIB SIDE), CURTAIN SHIELD AIRBAG ASSEMBLY, FRONT SEAT SIDE AIRBAG ASSEMBLY (SQUIB SIDE) AND FRONT SEAT OUTER BELT ASSEMBLY


    1. Connect the connector.

    2. Push down securely on the lock button of the connector (when locked, a click sound can be heard).

      A010KLZE20
      Text in Illustration
      *1 Lock Button - -
  6. DISCONNECTION OF CONNECTORS FOR LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY

    Tech Tips

    Tape the screwdriver tip before use.


    1. Release the lock button (black part) of the connector using a screwdriver.

    2. Insert the screwdriver tip between the connector and base, and then raise the connector.

      A010L4XE02
      Text in Illustration
      *1 Lock Button (Black Part) *2 Tape
  7. CONNECTION OF CONNECTORS FOR LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY


    1. Connect the connector.

    2. Push down security on the lock button (black part) of the connector (when locked, a click sound can be heard).

      A010I53E02
      Text in Illustration
      *1 Lock Button (Black Part) - -
  8. DISCONNECTION OF CONNECTOR FOR SPIRAL CABLE SUB-ASSEMBLY (INSTRUMENT PANEL WIRE SIDE) AND INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY (INSTRUMENT PANEL WIRE SIDE)


    1. Place a finger on the slider, slide the slider to release the lock, and then disconnect the connector.

      A010GQ8E12
      Text in Illustration
      *1 Slider - -
      *a Disconnection is completed - -
  9. CONNECTION OF CONNECTOR FOR SPIRAL CABLE SUB-ASSEMBLY (INSTRUMENT PANEL WIRE SIDE) AND INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY (INSTRUMENT PANEL WIRE SIDE)


    1. 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).

      Tech Tips

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

      A010II2E12
      Text in Illustration
      *1 Slider - -
      *a Connection is completed - -
  10. DISCONNECTION OF CONNECTORS FOR FRONT SEAT SIDE AIRBAG ASSEMBLY (FLOOR WIRE SIDE)


    1. Push the slider with a finger to detach the first claw. Without releasing your finger, slide the slider to detach the second claw and disconnect the connector.

      A010H7QE11
      Text in Illustration
      *1 Slider - -
      *a Push *b Disconnection is completed
  11. CONNECTION OF CONNECTORS FOR FRONT SEAT SIDE AIRBAG ASSEMBLY (FLOOR WIRE SIDE)


    1. Connect the connector as shown in the illustration (when locking, make sure that the slider returns to its original position and click sounds can be heard).

      Tech Tips

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

      A010KD4E04
      Text in Illustration
      *a Connection is completed - -
  12. DISCONNECTION OF CONNECTOR FOR CENTER AIRBAG SENSOR ASSEMBLY


    1. Pull the lever by pushing part A as shown in the illustration and disconnect the holder (with connectors).

      A010GCXE05
      Text in Illustration
      *1 Holder (with Connectors) - -
      *a Disconnection is completed - -

      Tech Tips

      Perform the following procedures when replacing the holder.

    2. Remove the holder.


      1. Using a screwdriver, unlock the retainer.

        A010J2WE06
        Text in Illustration
        *1 Retainer - -
      2. Release the fitting lances and remove the holder.

        A010IOVE05
        Text in Illustration
        *1 Lances - -
    3. A010JGIE02

      Install the holder.


      1. Install the connectors to the holder (when locked, a click sound can be heard).

        Tech Tips

        The retainer is locked when the holder is connected.

  13. CONNECTION OF CONNECTOR FOR CENTER AIRBAG SENSOR ASSEMBLY


    1. Firmly insert the holder (with connectors) into the center airbag sensor assembly until it cannot be pushed any further.

    2. Push the lever to connect the holder (with connectors) (when locked, a click sound can be heard).

      Tech Tips

      The holder slides into the center airbag sensor assembly when it is being connected. Be sure not to hold the holder while connecting, as it may result in an insecure fit.

      A010LZWE05
      Text in Illustration
      *1 Holder (with Connectors) *2 Lever
      *a Connection is completed - -
  14. DISCONNECTION OF CONNECTOR FOR FRONT AIRBAG SENSOR AND REAR AIRBAG SENSOR


    1. Push down the housing lock (white part) and slide the CPA (yellow part) (at this time, the connector cannot be disconnected yet).

    2. Push down the housing lock (white part) again and disconnect the connector.

      Tech Tips

      Do not push down the part labeled A shown in the illustration when disconnecting.

      A010JO5E17
      Text in Illustration
      *1 Housing Lock (White Part) *2 CPA (Yellow Part)
      *a Connector Lock is Released - -
    3. After disconnecting the connector, check that the position of the housing lock (white part) is as shown in the illustration.

      A010JFDE03
  15. CONNECTION OF CONNECTOR FOR FRONT AIRBAG SENSOR AND REAR AIRBAG SENSOR


    1. Before connecting the connectors, check that the position of the housing lock (white part) is as shown in the illustration.

      A010J0HE02
    2. Be sure to engage the connectors until they are locked (when locking, make sure that a click sound can be heard).

      Tech Tips

      When connecting the connectors, the housing lock (white part) slides. Be sure not to hold the housing lock (white part) and the part labeled A, as it may result in an insecure fit.

      A010G6JE16
      Text in Illustration
      *1 Housing Lock (White Part) *2 CPA (Yellow Part)
      *a Connection is completed - -
  16. DISCONNECTION OF CONNECTORS FOR SIDE AIRBAG SENSOR ASSEMBLY


    1. A010G80E03
      Text in Illustration
      *1 Outer Connector Locking Sleeve

      While holding the sides of the outer connector locking sleeve, slide the sleeve in the direction shown by the arrow.

    2. When the connector lock is released, the connectors are disconnected.

      Tech Tips

      Be sure to hold both sides of the sleeve. Holding the top and bottom will make disconnection difficult.

      A010GRSE10
      Text in Illustration
      *a Connector Lock is Released *b Disconnection is completed
  17. CONNECTION OF CONNECTORS FOR SIDE AIRBAG SENSOR


    1. Connect the connector as shown in the illustration (when locking, make sure that the outer connector locking sleeve returns to its original position and a click sound can be heard).

      Tech Tips

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

      A010GTXE13
      Text in Illustration
      *1 Outer Connector Locking Sleeve - -
      *a Connection is completed - -