AIRBAG SYSTEM, Diagnostic DTC:B1622/81, B1623/81, B1632/81, B1633/81, B1642/81, B1643/81

DTC Code DTC Name
B1622/81 Lost Communication with Driver Side - Side Airbag Sensor Assembly
B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete
B1632/81 Lost Communication with Driver Side Rear Airbag Sensor
B1633/81 Driver Side Rear Airbag Sensor Initialization Incomplete
B1642/81 Lost Communication with Driver Side Satellite Sensor Bus
B1643/81 Driver Side Satellite Sensor Bus Initialization Incomplete

DESCRIPTION

The driver side - side collision sensor circuit (to determine deployment of the front seat side airbag assembly (Driver side) and curtain shield airbag assembly (Driver side)) is composed of the center airbag sensor assembly, side airbag sensor (Driver side), and rear airbag sensor (Driver side).

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

DTC B1622/81, B1623/81, B1632/81, B1633/81, B1642/81, or B1643/81 is recorded when a malfunction is detected in the driver side - side collision sensor circuit (to determine deployment of the front seat side airbag assembly (Driver side) and curtain shield airbag assembly (Driver side)).

DTC No. DTC Detection Condition Trouble Area

B1622/81

B1623/81

B1632/81

B1633/81

B1642/81

B1643/81

  • 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 driver side - side collision sensor (Driver side) circuit (to determine deployment of the front seat side airbag assembly (Driver side) and curtain shield airbag assembly (Driver side)) for 2 seconds.


  • Side airbag sensor (Driver side) malfunction


  • Rear airbag sensor (Driver side) malfunction


  • Center airbag sensor assembly malfunction

  • Floor wire (for LHD)

  • Floor wire No. 2 (for RHD)

  • Side airbag sensor (Driver side)

  • Rear airbag sensor (Driver side)

  • Center airbag sensor assembly

WIRING DIAGRAM

A017C10E01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK PRESENT DTC


    1. A017DQCE03

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

    2. Check for present DTCs Click here.

      Result
      Result Proceed to
      Present DTC B1623 or B1643 is output. A
      Present DTC B1642 or 81 is output. B
      Present DTC B1632 or B1633 is output. C
      Present DTC B1622 is output. D
      Present DTC B1622, B1623, B1632, B1633, B1642, B1643 or 81 is not output. E

      Tech Tips


      • DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the ignition switch off and then on (IG) again.

      • Codes other than present DTC B1622, B1623, B1632, B1633, B1642, B1643, and 81 may be output at this time, but they are not related to this check.


    B

    CHECK CONNECTORS Click here

    C

    CHECK CONNECTORS Click here

    D

    CHECK SIDE AIRBAG SENSOR (DRIVER SIDE) Click here

    E

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK PAST DTC


    1. Check for past DTCs Click here.

      Result
      Result Proceed to
      Past DTC B1622 or B1632 is not output. A
      Past DTC B1632 is output. B
      Past DTC B1622 is output. C

      Tech Tips

      Codes other than past DTC B1622 and B1632 may be output at this time, but they are not related to this check.


    B

    CHECK CONNECTORS Click here

    C

    CHECK SIDE AIRBAG SENSOR (DRIVER SIDE) Click here

    A

  3. CHECK CONNECTORS


    1. Turn the ignition switch off.

    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

    3. Check that the connectors are properly connected to the center airbag sensor assembly, rear airbag sensor (Driver side) and the side airbag sensor (Driver side).

      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, rear airbag sensor (Driver side) and side airbag sensor (Driver side).

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

      OK
      The terminals are not deformed or damaged.
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE FLOOR WIRE NO. 2

    C

    REPLACE FLOOR WIRE

    A

  4. CHECK WIRE HARNESS (OPEN)


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

      A017C6QE02

      Note

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

      SST
      09843-18040

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

      Standard resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      O3-4 (BBL+) - O3-3 (BBL-) Always Below 1 Ω
      for RHD
      Tester Connection Switch Condition Specified Condition
      N3-4 (BBR+) - N3-3 (BBR-) Always Below 1 Ω
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE FLOOR WIRE NO. 2

    C

    REPLACE FLOOR WIRE

    A

  5. CHECK WIRE HARNESS (SHORT)


    1. A017EM5E02

      Disconnect SST from connector B.

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

      Standard resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      O3-4 (BBL+) - O3-3 (BBL-) Always 1 MΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      N3-4 (BBR+) - N3-3 (BBR-) Always 1 MΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE FLOOR WIRE NO. 2

    C

    REPLACE FLOOR WIRE

    A

  6. CHECK WIRE HARNESS (SHORT TO B+)


    1. A017EM5E02

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

    2. Turn the ignition switch on (IG).

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

      Standard voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      O3-4 (BBL+) - Body ground Ignition switch on (IG) Below 1 V
      O3-3 (BBL-) - Body ground Ignition switch on (IG) Below 1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      N3-4 (BBR+) - Body ground Ignition switch on (IG) Below 1 V
      N3-3 (BBR-) - Body ground Ignition switch on (IG) Below 1 V
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE FLOOR WIRE NO. 2

    C

    REPLACE FLOOR WIRE

    A

  7. CHECK WIRE HARNESS (SHORT TO GROUND)


    1. A017EM5E02

      Turn the ignition switch off.

    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

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

      Standard resistance
      for LHD
      Tester Connection Switch Condition Specified cCondition
      O3-4 (BBL+) - Body ground Always 1 MΩ or higher
      O3-3 (BBL-) - Body ground Always 1 MΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      N3-4 (BBR+) - Body ground Always 1 MΩ or higher
      N3-3 (BBR-) - Body ground Always 1 MΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE FLOOR WIRE NO. 2

    C

    REPLACE FLOOR WIRE

    A

  8. CHECK WIRE HARNESS (OPEN)


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

      A017BDAE03

      Note

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

      SST
      09843-18040

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

      Standard resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      O3-1 (BCL+) - O3-2 (BCL-) Always Below 1 Ω
      for RHD
      Tester Connection Switch Condition Specified Condition
      N3-1 (BCR+) - N3-2 (BCR-) Always Below 1 Ω
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE FLOOR WIRE NO. 2

    C

    REPLACE FLOOR WIRE

    A

  9. CHECK WIRE HARNESS (SHORT)


    1. A017ES7E03

      Disconnect SST from connector C.

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

      Standard resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      O3-1 (BCL+) - O3-2 (BCL-) Always 1 MΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      N3-1 (BCR+) - N3-2 (BCR-) Always 1 MΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE FLOOR WIRE NO. 2

    C

    REPLACE FLOOR WIRE

    A

  10. CHECK WIRE HARNESS (SHORT TO B+)


    1. A017ES7E03

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

    2. Turn the ignition switch on (IG).

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

      Standard voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      O3-1 (BCL+) - Body ground Ignition switch on (IG) Below 1 V
      O3-2 (BCL-) - Body ground Ignition switch on (IG) Below 1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      N3-1 (BCR+) - Body ground Ignition switch on (IG) Below 1 V
      N3-2 (BCR-) - Body ground Ignition switch on (IG) Below 1 V
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE FLOOR WIRE NO. 2

    C

    REPLACE FLOOR WIRE

    A

  11. CHECK WIRE HARNESS (SHORT TO GROUND)


    1. A017ES7E03

      Turn the ignition switch off.

    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

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

      Standard resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      O3-1 (BCL+) - Body ground Always 1 MΩ or higher
      O3-2 (BCL-) - Body ground Always 1 MΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      N3-1 (BCR+) - Body ground Always 1 MΩ or higher
      N3-2 (BCR-) - Body ground Always 1 MΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE FLOOR WIRE NO. 2

    C

    REPLACE FLOOR WIRE

    A

  12. CHECK SIDE AIRBAG SENSOR (DRIVER SIDE)


    1. A017GA6E02

      Connect the connector to the rear airbag sensor (Driver side) and center airbag sensor assembly.

    2. Interchange the side airbag sensor (Passenger side) with the side airbag sensor (Driver side) and connect the connectors to them.

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

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

    8. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1623, B1642, B1643, or 81 is output. A
      DTC B1628, B1647, B1648, or 82 is output. B
      DTC B1623, B1642, B1643, or 81 and B1628, B1647, B1648, or 82 are not output. C

      Tech Tips

      Codes other than DTC B1623, B1642, B1643, or 81 and B1628, B1647, B1648, or 82 may be output at this time, but they are not related to this check.


    B

    REPLACE SIDE AIRBAG SENSOR (DRIVER SIDE) Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  13. CHECK REAR AIRBAG SENSOR (DRIVER SIDE)


    1. A017B7UE03

      Turn the ignition switch off.

    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

    3. Return the side airbag sensor (Passenger side) and side airbag sensor (Driver side) to their original positions and connect the connectors to them.

    4. Interchange the rear airbag sensor (Passenger side) with the rear airbag sensor (Driver side) and connect the connectors to them.

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

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

    10. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1623, B1642, B1643, or 81 and B1628, B1647, B1648, or 82 are not output. A
      DTC B1623, B1642, B1643, or 81 is output. B
      DTC B1628, B1647, B1648, or 82 is output. C

      Tech Tips

      Codes other than DTC B1623, B1642, B1643, or 81 and B1628, B1647, B1648, or 82 may be output at this time, but they are not related to this check.


    B

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    C

    REPLACE REAR AIRBAG SENSOR (DRIVER SIDE) Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  14. CHECK CONNECTORS


    1. Turn the ignition switch off.

    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

    3. Check that the connectors are properly connected to the side airbag sensor (Driver side) and rear airbag sensor (Driver side).

      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 side airbag sensor (Driver side) and rear airbag sensor (Driver side).

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

      OK
      The terminals are not deformed or damaged.
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE FLOOR WIRE NO. 2

    C

    REPLACE FLOOR WIRE

    A

  15. CHECK WIRE HARNESS (OPEN)


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

      A017BDAE03

      Note

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

      SST
      09843-18040

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

      Standard resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      O3-1 (BCL+) - O3-2 (BCL-) Always Below 1 Ω
      for RHD
      Tester Connection Switch Condition Specified Condition
      N3-1 (BCR+) - N3-2 (BCR-) Always Below 1 Ω
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE FLOOR WIRE NO. 2

    C

    REPLACE FLOOR WIRE

    A

  16. CHECK WIRE HARNESS (SHORT)


    1. A017ES7E03

      Disconnect SST from connector C.

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

      Standard resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      O3-1 (BCL+) - O3-2 (BCL-) Always 1 MΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      N3-1 (BCR+) - N3-2 (BCR-) Always 1 MΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE FLOOR WIRE NO. 2

    C

    REPLACE FLOOR WIRE

    A

  17. CHECK WIRE HARNESS (SHORT TO B+)


    1. A017ES7E03

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

    2. Turn the ignition switch on (IG).

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

      Standard voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      O3-1 (BCL+) - Body ground Ignition switch on (IG) Below 1 V
      O3-2 (BCL-) - Body ground Ignition switch on (IG) Below 1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      N3-1 (BCR+) - Body ground Ignition switch on (IG) Below 1 V
      N3-2 (BCR-) - Body ground Ignition switch on (IG) Below 1 V
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE FLOOR WIRE NO. 2

    C

    REPLACE FLOOR WIRE

    A

  18. CHECK WIRE HARNESS (SHORT TO GROUND)


    1. A017ES7E03

      Turn the ignition switch off.

    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

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

      Standard resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      O3-1 (BCL+) - Body ground Always 1 MΩ or higher
      O3-2 (BCL-) - Body ground Always 1 MΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      N3-1 (BCR+) - Body ground Always 1 MΩ or higher
      N3-2 (BCR-) - Body ground Always 1 MΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE FLOOR WIRE NO. 2

    C

    REPLACE FLOOR WIRE

    A

  19. CHECK SIDE AIRBAG SENSOR (DRIVER SIDE)


    1. A017BCKE02

      Connect the connector to the rear airbag sensor.

    2. Interchange the side airbag sensor (Passenger side) with the side airbag sensor (Driver side) and connect the connectors to them.

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

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

    8. Check for DTCs Click here.

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

      Tech Tips

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


    B

    REPLACE SIDE AIRBAG SENSOR (DRIVER SIDE) Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  20. CHECK REAR AIRBAG SENSOR (DRIVER SIDE)


    1. A017FI4E05

      Turn the ignition switch off.

    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

    3. Return the side airbag sensor (Passenger side) and side airbag sensor (Driver side) to their original positions and connect the connectors to them.

    4. Interchange the rear airbag sensor (Passenger side) with the rear airbag sensor (Driver side) and connect the connectors to them.

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

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

    10. Check for DTCs Click here.

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

      Tech Tips

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


    B

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    C

    REPLACE REAR AIRBAG SENSOR (DRIVER SIDE) Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  21. CHECK SIDE AIRBAG SENSOR (DRIVER SIDE)


    1. A017BCKE02

      Turn the ignition switch off.

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

    3. Interchange the side airbag sensor (Passenger side) with the side airbag sensor (Driver side) and connect the connectors to them.

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

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

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

    7. Turn the ignition switch off.

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

    9. Check for DTCs Click here.

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

      Tech Tips

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


    B

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    C

    REPLACE SIDE AIRBAG SENSOR (DRIVER SIDE) Click here

    A

    USE SIMULATION METHOD TO CHECK Click here