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AIRBAG SYSTEM, Diagnostic DTC:B1627/82, B1628/82, B1637/82, B1638/82, B1647/82

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DTC Code DTC Name
B1627/82 Lost communication with Side Airbag Sensor LH
B1628/82 Side Airbag Sensor Assembly LH Initialization Incomplete
B1637/82 Lost Communication with Rear Airbag Sensor LH
B1638/82 Rear Airbag Sensor Assembly LH Initialization Incomplete
B1647/82 Lost Communication with Side Satellite Sensor Bus LH
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DESCRIPTION

The side collision sensor LH circuit (to determine deployment of the front seat airbag assembly LH, curtain shield airbag assembly LH, front seat outer belt assembly LH and rear seat outer belt assembly LH*) is composed of the airbag sensor assembly, side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.

The side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH detect impacts to the vehicle and send signals to the airbag sensor assembly to determine if the airbag should be deployed.

These DTCs are stored when a malfunction is detected in the side collision sensor LH circuit.

DTC No. DTC Detection Condition Trouble Area

B1627/82

B1628/82

B1637/82

B1638/82

B1647/82


  • The airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the side collision sensor LH circuit.

  • Side airbag sensor assembly LH malfunction

  • No. 2 side airbag sensor assembly LH malfunction

  • Airbag sensor assembly malfunction


  • Floor wire

  • Side airbag sensor assembly LH

  • No. 2 side airbag sensor assembly LH

  • Airbag sensor assembly

*: w/ Rear Pretensioner

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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work (Click here).

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PROCEDURE


  1. Click here

    CHECK CURRENT DTC


    1. Turn the power switch on (IG), and wait for at least 60 seconds.

    2. Check for current DTCs (Click here).

      Result
      Result Proceed to
      Current DTC B1628 is output. A
      Current DTC B1647 or 82 is output. B
      Current DTC B1637 or B1638 is output. C
      Current DTC B1627 is output. D
      Current DTCs B1627, B1628, B1637, B1638, B1647 and 82 are not output. E
      Tip:
      • DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the power switch off and then on (IG) again.

      • Codes other than current DTCs B1627, B1628, B1637, B1638, B1647 and 82 may be output at this time, but they are not related to this check.


  2. Click here

    CHECK HISTORY DTC


    1. Turn the power switch on (IG), and wait for at least 60 seconds.

    2. Check for history DTCs (Click here).

      Result
      Result Proceed to
      History DTC B1627 is not output. A
      History DTC B1627 is output. B
      Tip:

      Codes other than history DTC B1627 may be output at this time, but they are not related to this check.


  3. Click here

    CHECK CONNECTORS


    1. Turn the power switch off.

    2. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    3. Check that the connectors are properly connected to the airbag sensor assembly, side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.

      OK
      The connectors are properly connected.
      Tip:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the airbag sensor assembly, side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.

    5. Check that the terminals of the connectors are not damaged.

      OK
      The terminals are not deformed or damaged.

  4. Click here

    CHECK FLOOR WIRE (OPEN)

    09843-18040

    1. A003X7ME14

      w/o Rear Pretensioner


      1. Using SST, connect terminals 8 (BBL+) and 15 (BBL-) of connector B.

        Note:

        Do not forcibly insert SST into the terminals of the connector when connecting.

      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        P7-4 (BBL+) - P7-3 (BBL-) Always Below 1 Ω
      3. Disconnect SST from connector B.

        Table 1. Text in Illustration
        *1 Side Airbag Sensor Assembly LH *2 Airbag Sensor Assembly
        *3 Floor Wire *4 Connector B
        *5 Connector C - -
        *a

        Front view of wire harness connector

        (to Airbag Sensor Assembly)

        *b

        Front view of wire harness connector

        (to Side Airbag Sensor Assembly LH)

      09843-18040
    2. A003XV3E04

      w/ Rear Pretensioner


      1. Using SST, connect terminals 24 (BBL+) and 23 (BBL-) of connector B.

        Note:

        Do not forcibly insert SST into the terminals of the connector when connecting.

      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        P7-4 (BBL+) - P7-3 (BBL-) Always Below 1 Ω
    3. Disconnect SST from connector B.

      Table 2. Text in Illustration
      *1 Side Airbag Sensor Assembly LH *2 Airbag Sensor Assembly
      *3 Floor Wire *4 Connector B
      *5 Connector C - -
      *a

      Front view of wire harness connector

      (to Airbag Sensor Assembly)

      *b

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)


  5. Click here

    CHECK FLOOR WIRE (SHORT)


    1. A003X3ME13

      w/o Rear Pretensioner


      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        P7-4 (BBL+) - P7-3 (BBL-) Always 1 MΩ or higher
        Table 3. Text in Illustration
        *1 Side Airbag Sensor Assembly LH
        *2 Airbag Sensor Assembly
        *3 Floor Wire
        *4 Connector C
        *a

        Front view of wire harness connector

        (to Side Airbag Sensor Assembly LH)

    2. A003ZV2E05

      w/ Rear Pretensioner


      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        P7-4 (BBL+) - P7-3 (BBL-) Always 1 MΩ or higher
        Table 4. Text in Illustration
        *1 Side Airbag Sensor Assembly LH
        *2 Airbag Sensor Assembly
        *3 Floor Wire
        *4 Connector C
        *a

        Front view of wire harness connector

        (to Side Airbag Sensor Assembly LH)


  6. Click here

    CHECK FLOOR WIRE (SHORT TO B+)


    1. A003X3ME13

      w/o Rear Pretensioner


      1. Connect the cable to the negative (-) auxiliary battery terminal.

      2. Turn the power switch on (IG).

      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        P7-4 (BBL+) - Body ground Power switch on (IG) Below 1 V
        P7-3 (BBL-) - Body ground Power switch on (IG) Below 1 V
        Table 5. Text in Illustration
        *1 Side Airbag Sensor Assembly LH
        *2 Airbag Sensor Assembly
        *3 Floor Wire
        *4 Connector C
        *a

        Front view of wire harness connector

        (to Side Airbag Sensor Assembly LH)

    2. A003ZV2E05

      w/ Rear Pretensioner


      1. Connect the cable to the negative (-) auxiliary battery terminal.

      2. Turn the power switch on (IG).

      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        P7-4 (BBL+) - Body ground Power switch on (IG) Below 1 V
        P7-3 (BBL-) - Body ground Power switch on (IG) Below 1 V
        Table 6. Text in Illustration
        *1 Side Airbag Sensor Assembly LH
        *2 Airbag Sensor Assembly
        *3 Floor Wire
        *4 Connector C
        *a

        Front view of wire harness connector

        (to Side Airbag Sensor Assembly LH)


  7. Click here

    CHECK FLOOR WIRE (SHORT TO GROUND)


    1. A003X3ME13

      w/o Rear Pretensioner


      1. Turn the power switch off.

      2. Disconnect the cable from the negative (-) auxiliary battery terminal.

        CAUTION:

        Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        P7-4 (BBL+) - Body ground Always 1 MΩ or higher
        P7-3 (BBL-) - Body ground Always 1 MΩ or higher
        Table 7. Text in Illustration
        *1 Side Airbag Sensor Assembly LH
        *2 Airbag Sensor Assembly
        *3 Floor Wire
        *4 Connector C
        *a

        Front view of wire harness connector

        (to Side Airbag Sensor Assembly LH)

    2. A003ZV2E05

      w/ Rear Pretensioner


      1. Turn the power switch off.

      2. Disconnect the cable from the negative (-) auxiliary battery terminal.

        CAUTION:

        Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        P7-4 (BBL+) - Body ground Always 1 MΩ or higher
        P7-3 (BBL-) - Body ground Always 1 MΩ or higher
        Table 8. Text in Illustration
        *1 Side Airbag Sensor Assembly LH
        *2 Airbag Sensor Assembly
        *3 Floor Wire
        *4 Connector C
        *a

        Front view of wire harness connector

        (to Side Airbag Sensor Assembly LH)


  8. Click here

    CHECK FLOOR WIRE (OPEN)


    1. A003ZVVE12

      Using SST, connect terminals 2 (BCL+) and 1 (BCL-) of connector C.

      Note:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      09843-18040
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P7-1 (BCL+) - P7-2 (BCL-) Always Below 1 Ω
    3. Disconnect SST from connector C.

      Table 9. Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly LH *2 Side Airbag Sensor Assembly LH
      *3 Floor Wire *4 Connector B
      *5 Connector C - -
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)

      *b

      Front view of wire harness connector

      (to No. 2 Side Airbag Sensor Assembly LH)


  9. Click here

    CHECK FLOOR WIRE (SHORT)


    1. A003YMCE12

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P7-1 (BCL+) - P7-2 (BCL-) Always 1 MΩ or higher
      Table 10. Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly LH
      *2 Side Airbag Sensor Assembly LH
      *3 Floor Wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)


  10. Click here

    CHECK FLOOR WIRE (SHORT TO B+)


    1. A003YMCE12

      Connect the cable to the negative (-) auxiliary battery terminal.

    2. Turn the power switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      P7-1 (BCL+) - Body ground Power switch on (IG) Below 1 V
      P7-2 (BCL-) - Body ground Power switch on (IG) Below 1 V
      Table 11. Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly LH
      *2 Side Airbag Sensor Assembly LH
      *3 Floor Wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)


  11. Click here

    CHECK FLOOR WIRE (SHORT TO GROUND)


    1. A003YMCE12

      Turn the power switch off.

    2. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P7-1 (BCL+) - Body ground Always 1 MΩ or higher
      P7-2 (BCL-) - Body ground Always 1 MΩ or higher
      Table 12. Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly LH
      *2 Side Airbag Sensor Assembly LH
      *3 Floor Wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)


  12. Click here

    CHECK SIDE AIRBAG SENSOR ASSEMBLY LH


    1. A003YD1E01

      Connect the connectors to the No. 2 side airbag sensor assembly LH and airbag sensor assembly.

    2. Interchange the side airbag sensor assembly LH with RH and connect the connectors.

    3. Connect the cable to the negative (-) auxiliary battery terminal.

    4. Turn the power switch on (IG), and wait for at least 60 seconds.

    5. Clear the DTCs stored in memory (Click here).

    6. Turn the power switch off.

    7. Turn the power switch on (IG), and wait for at least 60 seconds.

    8. Check for DTCs (Click here).

      Result
      Result Proceed to
      DTC B1628, B1647 or 82 is output. A
      DTC B1623, B1642 or 81 is output. B
      DTCs B1623, B1628, B1642, B1647, 81 and 82 are not output. C
      Tip:

      Codes other than DTCs B1623, B1628, B1642, B1647, 81 and 82 may be output at this time, but they are not related to this check.

    9. Turn the power switch off.

    10. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    11. Return the side airbag sensor assembly LH and RH to their original positions and connect the connectors.

      Table 13. Text in Illustration
      *A w/o Rear Pretensioner
      *B w/ Rear Pretensioner
      *1 Side Airbag Sensor Assembly RH
      *2 Airbag Sensor Assembly

  13. Click here

    CHECK NO. 2 SIDE AIRBAG SENSOR ASSEMBLY LH


    1. A003Y0FE16

      Interchange the No. 2 side airbag sensor assembly LH with RH and connect the connectors.

    2. Connect the cable to the negative (-) auxiliary battery terminal.

    3. Turn the power switch on (IG), and wait for at least 60 seconds.

    4. Clear the DTCs stored in memory (Click here).

    5. Turn the power switch off.

    6. Turn the power switch on (IG), and wait for at least 60 seconds.

    7. Check for DTCs (Click here).

      Result
      Result Proceed to
      DTCs B1623, B1628, B1642, B1647, 81 and 82 are not output. A
      DTC B1628, B1647 or 82 is output. B
      DTC B1623, B1642 or 81 is output. C
      Tip:

      Codes other than DTCs B1623, B1628, B1642, B1647, 81 and 82 may be output at this time, but they are not related to this check.

    8. Turn the power switch off.

    9. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    10. Return the No. 2 side airbag sensor assembly LH and RH to their original positions and connect the connectors.

      Table 14. Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly RH
      *2 Side Airbag Sensor Assembly LH

  14. Click here

    CHECK CONNECTORS


    1. Turn the power switch off.

    2. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    3. Check that the connectors are properly connected to the side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.

      OK
      The connectors are properly connected.
      Tip:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.

    5. Check that the terminals of the connectors are not damaged.

      OK
      The terminals are not deformed or damaged.

  15. Click here

    CHECK FLOOR WIRE (OPEN)


    1. A003ZVVE12

      Using SST, connect terminals 2 (BCL+) and 1 (BCL-) of connector C.

      Note:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      09843-18040
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P7-1 (BCL+) - P7-2 (BCL-) Always Below 1 Ω
    3. Disconnect SST from connector C.

      Table 15. Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly LH *2 Side Airbag Sensor Assembly LH
      *3 Floor Wire *4 Connector B
      *5 Connector C - -
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)

      *b

      Front view of wire harness connector

      (to No. 2 Side Airbag Sensor Assembly LH)


  16. Click here

    CHECK FLOOR WIRE (SHORT)


    1. A003YMCE12

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P7-1 (BCL+) - P7-2 (BCL-) Always 1 MΩ or higher
      Table 16. Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly LH
      *2 Side Airbag Sensor Assembly LH
      *3 Floor Wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)


  17. Click here

    CHECK FLOOR WIRE (SHORT TO B+)


    1. A003YMCE12

      Connect the cable to the negative (-) auxiliary battery terminal.

    2. Turn the power switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      P7-1 (BCL+) - Body ground Power switch on (IG) Below 1 V
      P7-2 (BCL-) - Body ground Power switch on (IG) Below 1 V
      Table 17. Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly LH
      *2 Side Airbag Sensor Assembly LH
      *3 Floor Wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)


  18. Click here

    CHECK FLOOR WIRE (SHORT TO GROUND)


    1. A003YMCE12

      Turn the power switch off.

    2. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P7-1 (BCL+) - Body ground Always 1 MΩ or higher
      P7-2 (BCL-) - Body ground Always 1 MΩ or higher
      Table 18. Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly LH
      *2 Side Airbag Sensor Assembly LH
      *3 Floor Wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)


  19. Click here

    CHECK SIDE AIRBAG SENSOR ASSEMBLY LH


    1. A003YD1E01

      Connect the connector to the No. 2 side airbag sensor assembly LH.

    2. Interchange the side airbag sensor assembly LH with RH and connect the connectors.

    3. Connect the cable to the negative (-) auxiliary battery terminal.

    4. Turn the power switch on (IG), and wait for at least 60 seconds.

    5. Clear the DTCs stored in memory (Click here).

    6. Turn the power switch off.

    7. Turn the power switch on (IG), and wait for at least 60 seconds.

    8. Check for DTCs (Click here).

      Result
      Result Proceed to
      DTC B1637 or B1638 is output. A
      DTC B1632 or B1633 is output. B
      DTCs B1632, B1633, B1637 and B1638 are not output. C
      Tip:

      Codes other than DTCs B1632, B1633, B1637 and B1638 may be output at this time, but they are not related to this check.

    9. Turn the power switch off.

    10. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    11. Return the side airbag sensor assembly LH and RH to their original positions and connect the connectors.

      Table 19. Text in Illustration
      *A w/o Rear Pretensioner
      *B w/ Rear Pretensioner
      *1 Side Airbag Sensor Assembly RH
      *2 Airbag Sensor Assembly

  20. Click here

    CHECK NO. 2 SIDE AIRBAG SENSOR ASSEMBLY LH


    1. A003Y0FE16

      Interchange the No. 2 side airbag sensor assembly LH with RH and connect the connectors.

    2. Connect the cable to the negative (-) auxiliary battery terminal.

    3. Turn the power switch on (IG), and wait for at least 60 seconds.

    4. Clear the DTCs stored in memory (Click here).

    5. Turn the power switch off.

    6. Turn the power switch on (IG), and wait for at least 60 seconds.

    7. Check for DTCs (Click here).

      Result
      Result Proceed to
      DTCs B1632, B1633, B1637 and B1638 are not output. A
      DTC B1637 or B1638 is output. B
      DTC B1632 or B1633 is output. C
      Tip:

      Codes other than DTCs B1632, B1633, B1637 and B1638 may be output at this time, but they are not related to this check.

    8. Turn the power switch off.

    9. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    10. Return the No. 2 side airbag sensor assembly LH and RH to their original positions and connect the connectors.

      Table 20. Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly RH
      *2 Side Airbag Sensor Assembly LH

  21. Click here

    CHECK SIDE AIRBAG SENSOR ASSEMBLY LH


    1. A003YD1E01

      Turn the power switch off.

    2. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    3. Interchange the side airbag sensor assembly LH with RH and connect the connectors.

    4. Connect the cable to the negative (-) auxiliary battery terminal.

    5. Turn the power switch on (IG), and wait for at least 60 seconds.

    6. Clear the DTCs stored in memory (Click here).

    7. Turn the power switch off.

    8. Turn the power switch on (IG), and wait for at least 60 seconds.

    9. Check for DTCs (Click here).

      Result
      Result Proceed to
      DTCs B1622 and B1627 are not output. A
      DTC B1627 is output. B
      DTC B1622 is output. C
      Tip:

      Codes other than DTCs B1622 and B1627 may be output at this time, but they are not related to this check.

    10. Turn the power switch off.

    11. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    12. Return the side airbag sensor assembly LH and RH to their original positions and connect the connectors.

      Table 21. Text in Illustration
      *A w/o Rear Pretensioner
      *B w/ Rear Pretensioner
      *1 Side Airbag Sensor Assembly RH
      *2 Airbag Sensor Assembly

  22. Click here

    USE SIMULATION METHOD TO CHECKClick here

  23. Click here

    REPLACE FLOOR WIRE

  24. Click here

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY LHClick here

  25. Click here

    REPLACE NO. 2 SIDE AIRBAG SENSOR ASSEMBLY LHClick here

  26. Click here

    REPLACE AIRBAG SENSOR ASSEMBLYClick here