AIRBAG SYSTEM, Diagnostic DTC:B1623/81, B1642/81

DTC Code DTC Name
B1623/81 Side Airbag Sensor Assembly RH Initialization Incomplete
B1642/81 Lost Communication with Side Satellite Sensor Bus RH

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 center airbag sensor assembly, side airbag sensor RH and rear airbag sensor RH.

The side airbag sensor RH and rear airbag sensor RH detect impacts to the vehicle and send signals to the center airbag sensor assembly to determine if the airbag should be deployed.

These DTCs are 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

B1642/81

  • The center 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 RH malfunction

  • Rear airbag sensor RH malfunction

  • Center airbag sensor assembly malfunction

  • Floor wire

  • Side airbag sensor RH

  • Rear airbag sensor RH

  • Center airbag sensor assembly

WIRING DIAGRAM

A005KU0E03
*a Side Airbag Sensor RH
*b Rear Airbag Sensor RH
*c Center 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 center airbag sensor assembly, side airbag sensor RH and rear airbag sensor 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 center airbag sensor assembly, side airbag sensor RH and rear airbag sensor 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.

      A005HXME02
      Text in Illustration
      *1 Side Airbag Sensor RH *2 Center Airbag Sensor Assembly
      *3 Floor wire *4 Connector B
      *5 Connector C *6 Service Wire
      *a

      Rear view of wire harness connector

      (to Center Airbag Sensor Assembly)

      		 *b

      Front view of wire harness connector

      (to Side Airbag Sensor 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. A005HRME02
      Text in Illustration
      *1 Side Airbag Sensor RH
      *2 Center Airbag Sensor Assembly
      *3 Floor wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor 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. A005IF8E02
      Text in Illustration
      *1 Side Airbag Sensor RH
      *2 Center Airbag Sensor Assembly
      *3 Floor wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor 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. A005M3RE02
      Text in Illustration
      *1 Side Airbag Sensor RH
      *2 Center Airbag Sensor Assembly
      *3 Floor wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor 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 a service wire, connect terminals 2 (BCR+) and 1 (BCR-) of connector C.

      A005L0NE02
      Text in Illustration
      *1 Rear Airbag Sensor RH *2 Side Airbag Sensor RH
      *3 Floor wire *4 Connector B
      *5 Connector C *6 Service Wire
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor RH)

      		 *b

      Front view of wire harness connector

      (to Rear Airbag Sensor 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. A005L5QE02
      Text in Illustration
      *1 Rear Airbag Sensor RH
      *2 Side Airbag Sensor RH
      *3 Floor wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor 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. A005L5QE02
      Text in Illustration
      *1 Rear Airbag Sensor RH
      *2 Side Airbag Sensor RH
      *3 Floor wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor 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. A005L5QE02
      Text in Illustration
      *1 Rear Airbag Sensor RH
      *2 Side Airbag Sensor RH
      *3 Floor wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor 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 RH


    1. A005IJYE08
      Text in Illustration
      *1 Side Airbag Sensor LH
      *2 Center Airbag Sensor Assembly

      Connect the connectors to the rear airbag sensor RH and center airbag sensor assembly.

    2. Interchange the side airbag sensor RH with the side airbag sensor 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 or B1642/81 is output. A
      DTC B1628/82 or B1647/82 is output. B
      DTC B1623/81, B1642/81, B1628/82 or B1647/82 is not output. C

      Tech Tips

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


    B

    REPLACE SIDE AIRBAG SENSOR RH Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  12. CHECK REAR AIRBAG SENSOR RH


    1. A005L1SE16
      Text in Illustration
      *1 Rear Airbag Sensor LH
      *2 Side Airbag Sensor 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. Return the side airbag sensor RH and the side airbag sensor LH to their original positions and connect the connectors to them.

    4. Interchange the rear airbag sensor RH with the rear airbag sensor LH and connect the connectors to them.

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

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

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

    8. Turn the ignition switch off.

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

    10. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1623/81, B1642/81, B1628/82 or B1647/82 is not output. A
      DTC B1623/81 or B1642/81 is output. B
      DTC B1628/82 or B1647/82 is output. C

      Tech Tips

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


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    C

    REPLACE REAR AIRBAG SENSOR RH Click here