• This vehicle is equipped with a Supplemental Restraint System (SRS), which consists of a horn button assembly, instrument panel passenger airbag assembly, curtain shield airbag assembly, front seat airbag assembly, lower No. 1 instrument panel airbag assembly, front seat outer belt assembly, airbag sensor assembly, front airbag sensor, door side airbag sensor and side airbag sensor assembly. 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.

  • 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.


  • 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.

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  • 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 negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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  • When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.

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  • After replacing the airbag sensor assembly, refer to initialization*.

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    *: w/ VSC

  • The different types of airbag sensor assemblies are shown in the table below.

    Before starting work, check the type of the airbag sensor assembly.

    ECU Type
    Type A B0025Z2
    Type B B0026MX
    Type C B0027CZ

Tech Tips

In the airbag system, the airbag sensor assembly, front airbag sensor LH and RH, door side airbag sensor LH and RH and side airbag sensor assembly LH and RH are collectively referred to as the airbag sensors.


    1. 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 LOCK Off (Lock)
      Ignition Switch ACC ACC On (ACC)
      Ignition Switch ON ON On (IG)
      Engine Start START On (Start)

    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, make sure 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.


    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 related airbag sensor and inspect its normal operation.