AIRBAG SYSTEM PRECAUTION

CAUTION:


  • The vehicle is equipped with an SRS(Supplemental Restraint System), which consists of a driver airbag, front passenger airbag, side airbags and curtain shield airbags. Failure to carry out service operations in the correct sequence could cause the SRS to unexpectedly deploy during servicing, possibly leading to a serious accident. Further more, if a mistake is made in servicing the SRS, it is possible that the SRS may fail to operate when required. Before performing servicing (including removal or installation of parts, inspection or replacement), be sure to read the following items carefully, then follow the correct procedures as indicated in the repair manual.

  • Wait at least 90 seconds after the ignition switch is turned to the LOCK position and the negative (-) terminal cable is disconnected from the battery. (The SRS is equipped with a back-up power source, so if work is started within 90 seconds of disconnecting the negative (-) terminal cable of the battery, the SRS may be deployed.)

  • Do not directly expose the horn button assembly, front passenger airbag assembly, center airbag sensor assembly, front seat airbag assembly, side airbag sensor assembly or curtain shield airbag assembly to hot air or flames.

Note


  • Malfunction symptoms of the SRS are difficult to confirm, so DTCs are the most important source of information when troubleshooting. When troubleshooting the SRS, always inspect DTCs before disconnecting the battery.

  • Even in the case of a minor collision when the SRS does not deploy, the following parts should be inspected.


  • Before commencing repair work, remove the airbag sensor if any kind of shock is likely to occur to the airbag sensor during the operation.

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

  • Never disassemble or repair the horn button assembly, front passenger airbag assembly, center airbag sensor assembly, front seat airbag assembly, side airbag sensor assembly or curtain shield airbag assembly, in order to reuse it.

  • If the horn button assembly, front passenger airbag assembly, center airbag sensor assembly, front seat airbag assembly, side airbag sensor assembly or curtain shield airbag assembly has been dropped, or if there are any cracks, dents or other defects in the case, bracket or connector, replace it with a new one.

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

  • Information labels are attached to the periphery of the SRS components. Follow the instructions in the cautions.

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

  • When the negative (-) terminal cable is disconnected from the battery, the memory will be cleared. Thus, be sure to make a record of the contents stored in each system before starting work. When the work is finished, reset each system as it was before. Never use a back-up power supply from outside the vehicle to avoid erasing the memory in any system.

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

  • After the center airbag sensor assembly and side airbag sensor assembly are attached to the vehicle, perform attachment and detachment of a connector.

  • Don't use center airbag sensor assemblies or side airbag sensor assemblies that have been dropped during work or transportation.

  • Don't take apart the center airbag sensor assembly or side airbag sensor assembly.

Tech Tips


  • Investigation procedures after frontal and side crashes


    • If the airbag has not deployed, check diagnostic codes. Carry out troubleshooting, when a malfunction is detected.

    • If the driver and passenger seat airbags have deployed, replace the center airbag sensor assembly. Check the attachment state of the side airbag sensor assembly and replace each sensor if there are any signs of distortion, breakage, and so on.

    • If the side and curtain shield airbags have deployed, replace the center airbag sensor assembly and the collision side airbag sensor assembly. Check the attachment state of the side airbag sensor assembly on the opposite side and replace it if there is any sign of distortion, breakage, and so on.

    • A fuel cut signal is output by the engine control computer at the time of airbag deployment.

  • Recovery of center airbag sensor assembly and side airbag sensor


    • Perform recovery of the replaced center airbag sensor assembly and the side airbag sensor assembly after troubleshooting.


  1. SRS CONNECTORS

    Tech Tips

    SRS connectors are located as shown in the following illustration.

    A0138NFE01
    Connector Type Application
    Terminal Twin-Lock Mechanism Application Connectors 2, 4, 6, 8 ,9, 10, 11, 13, 14, 15, 17, 19, 21, 23, 25
    Activation Prevention Mechanism Connectors 2, 4, 12, 14, 16, 18, 22, 24, 26
    Half Connection Prevention Mechanism Connectors 6, 9, 11, 13,
    Connector Lock Mechanism (1) Connectors 15, 17, 23, 25
    Connector Lock Mechanism (2) Connectors 2, 4
    Improper Connection Prevention Lock Mechanism Connectors 1, 3

    1. All connectors in the SRS except the seat position airbag sensor connector and the occupant detection ECU connector are colored yellow to distinguish them from other connectors. 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.


      1. A0138VTE01

        Terminal twin-lock mechanism: Each connector is 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 the terminals from becoming disconnected.

      2. Activation prevention mechanism: Each connector contains a short spring plate. When the connector is disconnected, the short spring plate automatically connects the positive (+) and negative (-) terminals of the squib.

        A0135XRE01

      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.

        A0136DSE01

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

        A0138AAE03

      5. Connector lock mechanism (2): The holder lances prevent the connector from being disconnected.

        A0138STE01

      6. Improper connection prevention lock mechanism: Gear A located on the tip of the holder lever engages with gear B of the center airbag sensor assembly, and the connector is securely connected to the ECU by pulling the holder lever.

        A01370XE01

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


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

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

      A01371CE03

  3. CONNECTION OF CONNECTORS FOR HORN BUTTON ASSEMBLY, FRONT PASSENGER AIRBAG ASSEMBLY AND CURTAIN SHIELD AIRBAG ASSEMBLY


    1. Connect the connector.

    2. Push the lock button (yellow part) of the connector down securely. (When locking, a click sound can be heard.)

      A0135X3E03

  4. DISCONNECTION OF CONNECTOR FOR FRONT SEAT AIRBAG ASSEMBLY


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

      A0136PRE01

  5. CONNECTION OF CONNECTOR FOR FRONT SEAT AIRBAG ASSEMBLY

    A0136KUE01

  6. DISCONNECTION OF CONNECTOR FOR FRONT PASSENGER AIRBAG ASSEMBLY


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

      A0136OPE01

  7. CONNECTION OF CONNECTOR FOR FRONT PASSENGER AIRBAG ASSEMBLY

    Tech Tips

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

    A013882E01

  8. DISCONNECTION OF CONNECTOR FOR CENTER AIRBAG SENSOR ASSEMBLY


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

      A01364OE01

    2. Remove the holder.


      1. Release the fitting lances and remove the holder.

        A0138STE01

  9. CONNECTION OF CONNECTOR FOR CENTER AIRBAG SENSOR ASSEMBLY


    1. Firmly insert the holder (with connectors) until it cannot be pushed any further.

    2. Pull the levers out to lock the holder (with connectors). (When locking, a click sound can be heard.)

      Tech Tips

      The holder slides when connecting. Holding the holder when connecting may result in an insecure connection.

      A0136N7E01

  10. DISCONNECTION OF CONNECTORS FOR SIDE AIRBAG SENSOR ASSEMBLY


    1. A01382VE01

      While holding both outer flanks, slide the outer in the direction shown by the arrow.

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

      Tech Tips

      Be sure to hold the connector by the outer flanks. Holding the top and bottom sides will make disconnection difficult.

      A0137T0E01

  11. CONNECTION OF CONNECTORS FOR SIDE AIRBAG SENSOR ASSEMBLY


    1. 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.)

      Tech Tips

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

      A0136OGE01