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

DTC Code DTC Name
B1622/81 Lost communication with Side Airbag Sensor RH
B1623/81 Side Airbag Sensor Assembly RH Initialization Incomplete
B1632/81 Lost Communication with Rear Airbag Sensor RH
B1633/81 Rear 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

B1622/81

B1623/81

B1632/81

B1633/81

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

  • No. 2 floor wire

  • Side airbag sensor RH

  • Rear airbag sensor RH

  • Center airbag sensor assembly

WIRING DIAGRAM

A003UU8E36

INSPECTION PROCEDURE

PROCEDURE


  1. 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 B1623 is output. A
      Current DTC B1642 or 81 is output. B
      Current DTC B1632 or B1633 is output. C
      Current DTC B1622 is output. D
      Current DTC B1622, B1623, B1632, B1633, B1642 or 81 is not output. E

      Tech Tips


      • 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 DTCs B1622, B1623, B1632, B1633, B1642 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 RH Click here

    E

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. 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 B1622 or B1632 is not output. A
      History DTC B1632 is output. B
      History DTC B1622 is output. C

      Tech Tips

      Codes other than history DTCs 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 RH Click here

    A

  3. CHECK CONNECTORS


    1. Turn the power 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 the connectors are not damaged.

      OK
      The terminals are not deformed or damaged.

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  4. CHECK NO. 2 FLOOR WIRE (OPEN)


    1. Using SST, connect terminals 8 (BBR+) and 11 (BBR-) of connector B.

      A003RSSE08

      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
      Tester Connection Condition Specified Condition
      M4-4 (BBR+) - M4-3 (BBR-) Always Below 1 Ω
      Text in Illustration
      *1 Side Airbag Sensor RH *2 Center Airbag Sensor Assembly
      *3 No. 2 Floor Wire *4 Connector B
      *5 Connector C - -
      *a

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)

      		 *b

      Front view of wire harness connector

      (to Side Airbag Sensor RH)

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  5. CHECK NO. 2 FLOOR WIRE (SHORT)


    1. A003SNZE08
      Text in Illustration
      *1 Side Airbag Sensor RH
      *2 Center Airbag Sensor Assembly
      *3 No. 2 Floor Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor RH)

      Disconnect SST from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M4-4 (BBR+) - M4-3 (BBR-) Always 1 MΩ or higher

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  6. CHECK NO. 2 FLOOR WIRE (SHORT TO B+)


    1. A003SNZE08
      Text in Illustration
      *1 Side Airbag Sensor RH
      *2 Center Airbag Sensor Assembly
      *3 No. 2 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 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
      M4-4 (BBR+) - Body ground Power switch on (IG) Below 1 V
      M4-3 (BBR-) - Body ground Power switch on (IG) Below 1 V

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  7. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)


    1. A003SNZE08
      Text in Illustration
      *1 Side Airbag Sensor RH
      *2 Center Airbag Sensor Assembly
      *3 No. 2 Floor Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor RH)

      Turn the power 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
      M4-4 (BBR+) - Body ground Always 1 MΩ or higher
      M4-3 (BBR-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  8. CHECK NO. 2 FLOOR WIRE (OPEN)


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

      A003TCWE05

      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
      Tester Connection Condition Specified Condition
      M4-1 (BCR+) - M4-2 (BCR-) Always Below 1 Ω
      Text in Illustration
      *1 Rear Airbag Sensor RH *2 Side Airbag Sensor RH
      *3 No. 2 Floor Wire *4 Connector B
      *5 Connector C - -
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor RH)

      		 *b

      Front view of wire harness connector

      (to Rear Airbag Sensor RH)

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  9. CHECK NO. 2 FLOOR WIRE (SHORT)


    1. A003U5EE05
      Text in Illustration
      *1 Rear Airbag Sensor RH
      *2 Side Airbag Sensor RH
      *3 No. 2 Floor Wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor RH)

      Disconnect SST from connector C.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M4-1 (BCR+) - M4-2 (BCR-) Always 1 MΩ or higher

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  10. CHECK NO. 2 FLOOR WIRE (SHORT TO B+)


    1. A003U5EE05
      Text in Illustration
      *1 Rear Airbag Sensor RH
      *2 Side Airbag Sensor RH
      *3 No. 2 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 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
      M4-1 (BCR+) - Body ground Power switch on (IG) Below 1 V
      M4-2 (BCR-) - Body ground Power switch on (IG) Below 1 V

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  11. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)


    1. A003U5EE05
      Text in Illustration
      *1 Rear Airbag Sensor RH
      *2 Side Airbag Sensor RH
      *3 No. 2 Floor Wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor RH)

      Turn the power 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
      M4-1 (BCR+) - Body ground Always 1 MΩ or higher
      M4-2 (BCR-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  12. CHECK SIDE AIRBAG SENSOR RH


    1. A003UOBE08
      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 LH with the side airbag sensor RH and connect the connectors to them.

    3. Connect the cable to the negative (-) 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 B1623, B1642 or 81 is output. A
      DTC B1628, B1647 or 82 is output. B
      DTCs B1623, B1642 or 81 and B1628, B1647 or 82 are not output. C

      Tech Tips

      Codes other than DTCs B1623, B1642 or 81 and B1628, B1647 or 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

  13. CHECK REAR AIRBAG SENSOR RH


    1. A003SV4E16
      Text in Illustration
      *1 Rear Airbag Sensor LH
      *2 Side Airbag Sensor RH

      Turn the power 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 LH and side airbag sensor RH to their original positions and connect the connectors to them.

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

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

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

    7. Clear the DTCs stored in memory Click here.

    8. Turn the power switch off.

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

    10. Check for DTCs Click here.

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

      Tech Tips

      Codes other than DTCs B1623, B1642 or 81 and B1628, B1647 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 RH Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  14. CHECK CONNECTORS


    1. Turn the power 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 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 side airbag sensor RH and rear airbag sensor RH.

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

      OK
      The terminals are not deformed or damaged.

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  15. CHECK NO. 2 FLOOR WIRE (OPEN)


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

      A003TCWE05

      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
      Tester Connection Condition Specified Condition
      M4-1 (BCR+) - M4-2 (BCR-) Always Below 1 Ω
      Text in Illustration
      *1 Rear Airbag Sensor RH *2 Side Airbag Sensor RH
      *3 No. 2 Floor Wire *4 Connector B
      *5 Connector C - -
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor RH)

      		 *b

      Front view of wire harness connector

      (to Rear Airbag Sensor RH)

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  16. CHECK NO. 2 FLOOR WIRE (SHORT)


    1. A003U5EE05
      Text in Illustration
      *1 Rear Airbag Sensor RH
      *2 Side Airbag Sensor RH
      *3 No. 2 Floor Wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor RH)

      Disconnect SST from connector C.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M4-1 (BCR+) - M4-2 (BCR-) Always 1 MΩ or higher

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  17. CHECK NO. 2 FLOOR WIRE (SHORT TO B+)


    1. A003U5EE05
      Text in Illustration
      *1 Rear Airbag Sensor RH
      *2 Side Airbag Sensor RH
      *3 No. 2 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 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
      M4-1 (BCR+) - Body ground Power switch on (IG) Below 1 V
      M4-2 (BCR-) - Body ground Power switch on (IG) Below 1 V

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  18. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)


    1. A003U5EE05
      Text in Illustration
      *1 Rear Airbag Sensor RH
      *2 Side Airbag Sensor RH
      *3 No. 2 Floor Wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor RH)

      Turn the power 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
      M4-1 (BCR+) - Body ground Always 1 MΩ or higher
      M4-2 (BCR-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  19. CHECK SIDE AIRBAG SENSOR RH


    1. A003UOBE08
      Text in Illustration
      *1 Side Airbag Sensor LH
      *2 Center Airbag Sensor Assembly

      Connect the connector to the rear airbag sensor RH.

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

    3. Connect the cable to the negative (-) 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 B1632 or B1633 is output. A
      DTC B1637 or B1638 is output. B
      DTCs B1632 or B1633 and B1637 or B1638 are not output. C

      Tech Tips

      Codes other than DTCs B1632, B1633, B1637 and B1638 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

  20. CHECK REAR AIRBAG SENSOR RH


    1. A003SV4E16
      Text in Illustration
      *1 Rear Airbag Sensor LH
      *2 Side Airbag Sensor RH

      Turn the power 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 LH and side airbag sensor RH to their original positions and connect the connectors to them.

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

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

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

    7. Clear the DTCs stored in memory Click here.

    8. Turn the power switch off.

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

    10. Check for DTCs Click here.

      Result
      Result Proceed to
      DTCs 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 DTCs B1632, B1633, B1637 and 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 RH Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  21. CHECK SIDE AIRBAG SENSOR RH


    1. A003UOBE08
      Text in Illustration
      *1 Side Airbag Sensor LH
      *2 Center Airbag Sensor Assembly

      Turn the power 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. Interchange the side airbag sensor LH with the side airbag sensor RH and connect the connectors to them.

    4. Connect the cable to the negative (-) 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 B1622 is output. B
      DTC B1627 is output. C

      Tech Tips

      Codes other than DTCs 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 RH Click here

    A

    USE SIMULATION METHOD TO CHECK Click here