AIRBAG SYSTEM(w/ Curtain Shield Airbag), Diagnostic DTC:B1623/81

DTC Code DTC Name
B1623/81 Side Airbag Sensor Assembly RH Initialization Incomplete

DESCRIPTION

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

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

This DTC is stored when a malfunction is detected for the side collision sensor RH circuit (to determine deployment of the front seat side airbag assembly RH and curtain shield airbag assembly RH).

DTC No. DTC Detection Condition Trouble Area
B1623/81

  • 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 RH circuit (to determine deployment of the front seat side airbag assembly RH and curtain shield airbag assembly RH).

  • Side airbag sensor assembly RH malfunction

  • No. 2 side airbag sensor assembly RH malfunction

  • Airbag sensor assembly malfunction

  • Floor wire

  • Side airbag sensor assembly RH

  • No. 2 side airbag sensor assembly RH

  • Airbag sensor assembly

WIRING DIAGRAM

A01VI1PE09
*a Side Airbag Sensor Assembly RH
*b No. 2 Side Airbag Sensor Assembly RH
*c Airbag Sensor Assembly

PROCEDURE


  1. CHECK HISTORY DTC


    1. Turn the ignition switch to ON, and wait for at least 60 seconds.

    2. Check for history DTCs Click here.

      Result
      History DTC B1622/81 or B1632/81 is not output.

      Tech Tips

      Codes other than history DTCs B1622/81 and B1632/81 may be output at this time, but they are not related to this check.


    NG

    INSPECTION PROCEDURE RELEVANT TO OUTPUT DTC Click here

    OK

  2. CHECK CONNECTORS


    1. Turn the ignition switch off.

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

      CAUTION:

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

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

      OK
      The connectors are properly connected.

      Tech Tips

      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 RH and No. 2 side airbag sensor assembly RH.

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

      OK
      The terminals are not deformed or damaged.

    NG

    REPLACE FLOOR WIRE

    OK

  3. CHECK FLOOR WIRE (OPEN)


    1. Using a service wire, connect terminals 17 (BBR+) and 18 (BBR-) of connector B.

      A01VFOEE01
      Text in Illustration
      *1 Side Airbag Sensor Assembly RH *2 Airbag Sensor Assembly
      *3 Floor Wire *4 Connector B
      *5 Connector C *6 Service Wire
      *a

      Front view of wire harness connector

      (to Airbag Sensor Assembly)

      		 *b

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly RH)

      Note

      Do not forcibly insert the service wire 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
      K22-4 (BBR+) - K22-3 (BBR-) Always Below 1 Ω

    NG

    REPLACE FLOOR WIRE

    OK

  4. CHECK FLOOR WIRE (SHORT)


    1. A01VJ92E02
      Text in Illustration
      *1 Side Airbag Sensor Assembly RH
      *2 Airbag Sensor Assembly
      *3 Floor Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly RH)

      Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K22-4 (BBR+) - K22-3 (BBR-) Always 1 MΩ or higher

    NG

    REPLACE FLOOR WIRE

    OK

  5. CHECK FLOOR WIRE (SHORT TO B+)


    1. A01VJ92E02
      Text in Illustration
      *1 Side Airbag Sensor Assembly RH
      *2 Airbag Sensor Assembly
      *3 Floor Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly RH)

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

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      K22-4 (BBR+) - Body ground Ignition switch ON Below 1 V
      K22-3 (BBR-) - Body ground Ignition switch ON Below 1 V

    NG

    REPLACE FLOOR WIRE

    OK

  6. CHECK FLOOR WIRE (SHORT TO GROUND)


    1. A01VJ92E02
      Text in Illustration
      *1 Side Airbag Sensor Assembly RH
      *2 Airbag Sensor Assembly
      *3 Floor Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly RH)

      Turn the ignition switch off.

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

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) 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
      K22-4 (BBR+) - Body ground Always 1 MΩ or higher
      K22-3 (BBR-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE FLOOR WIRE

    OK

  7. CHECK FLOOR WIRE (OPEN)


    1. Using the service wire, connect terminals 2 (BCR+) and 1 (BCR-) of connector C.

      A01VHCJE02
      Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly RH *2 Side Airbag Sensor Assembly RH
      *3 Floor Wire *4 Connector B
      *5 Connector C *6 Service Wire
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly RH)

      		 *b

      Front view of wire harness connector

      (to No. 2 Side Airbag Sensor Assembly RH)

      Note

      Do not forcibly insert the service wire 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
      K22-1 (BCR+) - K22-2 (BCR-) Always Below 1 Ω

    NG

    REPLACE FLOOR WIRE

    OK

  8. CHECK FLOOR WIRE (SHORT)


    1. A01VH73E02
      Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly RH
      *2 Side Airbag Sensor Assembly RH
      *3 Floor Wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly RH)

      Disconnect the service wire from connector C.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K22-1 (BCR+) - K22-2 (BCR-) Always 1 MΩ or higher

    NG

    REPLACE FLOOR WIRE

    OK

  9. CHECK FLOOR WIRE (SHORT TO B+)


    1. A01VH73E02
      Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly RH
      *2 Side Airbag Sensor Assembly RH
      *3 Floor Wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly RH)

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

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      K22-1 (BCR+) - Body ground Ignition switch ON Below 1 V
      K22-2 (BCR-) - Body ground Ignition switch ON Below 1 V

    NG

    REPLACE FLOOR WIRE

    OK

  10. CHECK FLOOR WIRE (SHORT TO GROUND)


    1. A01VH73E02
      Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly RH
      *2 Side Airbag Sensor Assembly RH
      *3 Floor Wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly RH)

      Turn the ignition switch off.

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

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) 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
      K22-1 (BCR+) - Body ground Always 1 MΩ or higher
      K22-2 (BCR-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE FLOOR WIRE

    OK

  11. CHECK SIDE AIRBAG SENSOR ASSEMBLY RH


    1. A01VDPCE01
      Text in Illustration
      *1 Side Airbag Sensor Assembly LH
      *2 Airbag Sensor Assembly

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

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

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

    4. Turn the ignition switch to ON, and wait for at least 60 seconds.

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

    6. Turn the ignition switch off.

    7. Turn the ignition switch to ON, and wait for at least 60 seconds.

    8. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1623/81 is output. A
      DTC B1628/82 is output. B
      DTC B1623/81 or B1628/82 is not output. C

      Tech Tips

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

    9. Turn the ignition switch off.

    10. Disconnect the cable to the negative (-) battery terminal.

      CAUTION:

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

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


    B

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  12. CHECK NO. 2 SIDE AIRBAG SENSOR ASSEMBLY RH


    1. A01VFE5E16
      Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly LH
      *2 Side Airbag Sensor Assembly RH

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

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

    3. Turn the ignition switch to ON, and wait for at least 60 seconds.

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

    5. Turn the ignition switch off.

    6. Turn the ignition switch to ON, and wait for at least 60 seconds.

    7. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1623/81 or B1628/82 is not output. A
      DTC B1623/81 is output. B
      DTC B1628/82 is output. C

      Tech Tips

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

    8. Turn the ignition switch off.

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

      CAUTION:

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

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


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    C

    REPLACE NO. 2 SIDE AIRBAG SENSOR ASSEMBLY RH Click here