AIRBAG SYSTEM, Diagnostic DTC:B1633/81

DTC Code DTC Name
B1633/81 Rear 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, door side airbag sensor RH and No. 2 side airbag sensor assembly RH.

The door side airbag sensor 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
B1633/81

Any of the following conditions is met:


  • 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).

  • Door side airbag sensor RH malfunction

  • No. 2 side airbag sensor assembly RH malfunction

  • Airbag sensor assembly malfunction

  • Floor wire

  • Door side airbag sensor RH

  • No. 2 side airbag sensor assembly RH

  • Airbag sensor assembly

WIRING DIAGRAM

Click here

PROCEDURE


  1. CHECK HISTORY DTC


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

    2. Check for history DTCs Click here.

      Result
      History DTC B1632/81 or B1637/82 is not output.

      Tech Tips

      Codes other than history DTCs B1632/81 and B1637/82 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 (-) 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, door side airbag sensor 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 WIRE HARNESS

    OK

  3. CHECK FLOOR WIRE (OPEN)

    A004GHCE01
    Text in Illustration
    *1 No. 2 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 No. 2 Side Airbag Sensor Assembly RH)

    Note

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


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K41-3 (BCR-) - K41-4 (BCR+) Always Below 1 Ω

    NG

    REPLACE FLOOR WIRE

    OK

  4. CHECK FLOOR WIRE (SHORT)


    1. A004GFME01
      Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly RH
      *2 Airbag Sensor Assembly
      *3 Floor Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to No. 2 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
      K41-3 (BCR-) - K41-4 (BCR+) Always 1 MΩ or higher

    NG

    REPLACE FLOOR WIRE

    OK

  5. CHECK FLOOR WIRE (SHORT TO B+)


    1. A004GFME02
      Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly RH
      *2 Airbag Sensor Assembly
      *3 Floor Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to No. 2 Side Airbag Sensor Assembly RH)

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

    2. Turn the ignition switch to ON (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      K41-3 (BCR-) - Body ground Ignition switch ON (IG) Below 1 V
      K41-4 (BCR+) - Body ground Ignition switch ON (IG) Below 1 V

    NG

    REPLACE FLOOR WIRE

    OK

  6. CHECK FLOOR WIRE (SHORT TO GROUND)


    1. A004GFME03
      Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly RH
      *2 Airbag Sensor Assembly
      *3 Floor Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to No. 2 Side Airbag Sensor Assembly RH)

      Turn the ignition 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
      K41-3 (BCR-) - Body ground Always 1 MΩ or higher
      K41-4 (BCR+) - Body ground Always 1 MΩ or higher

    NG

    REPLACE FLOOR WIRE

    OK

  7. CHECK FLOOR WIRE AND FRONT DOOR WIRE RH (OPEN)


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

      A004EMBE01
      Text in Illustration
      *1 Door Side Airbag Sensor RH *2 No. 2 Side Airbag Sensor Assembly RH
      *3 Front Door Wire RH *4 Floor Wire
      *5 Connector B *6 Connector E
      *7 Service Wire - -
      *a

      Front view of wire harness connector

      (to No. 2 Side Airbag Sensor Assembly RH)

      		 *b

      Front view of wire harness connector

      (to Door 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
      K41-1 (BDR+) - K41-2 (BDR-) Always Below 1 Ω

    NG

    CHECK FRONT DOOR WIRE RH (OPEN) Click here

    OK

  8. CHECK FLOOR WIRE AND FRONT DOOR WIRE RH (SHORT)


    1. A004FN4E02
      Text in Illustration
      *1 Door Side Airbag Sensor RH
      *2 No. 2 Side Airbag Sensor Assembly RH
      *3 Front Door Wire RH
      *4 Floor Wire
      *5 Connector B
      *a

      Front view of wire harness connector

      (to No. 2 Side Airbag Sensor Assembly RH)

      Disconnect the service wire from connector E.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K41-1 (BDR+) - K41-2 (BDR-) Always 1 MΩ or higher

    NG

    CHECK FRONT DOOR WIRE RH (SHORT) Click here

    OK

  9. FLOOR WIRE AND FRONT DOOR WIRE RH (SHORT TO B+)


    1. A004FN4E01
      Text in Illustration
      *1 Door Side Airbag Sensor RH
      *2 No. 2 Side Airbag Sensor Assembly RH
      *3 Front Door Wire RH
      *4 Floor Wire
      *5 Connector B
      *a

      Front view of wire harness connector

      (to No. 2 Side Airbag Sensor Assembly RH)

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

    2. Turn the ignition switch to ON (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      K41-1 (BDR+) - Body ground Ignition switch ON (IG) Below 1 V
      K41-2 (BDR-) - Body ground Ignition switch ON (IG) Below 1 V

    NG

    CHECK FRONT DOOR WIRE RH (SHORT TO B+) Click here

    OK

  10. REPLACE FLOOR WIRE AND FRONT DOOR WIRE RH (SHORT TO GROUND)


    1. A004FN4E03
      Text in Illustration
      *1 Door Side Airbag Sensor RH
      *2 No. 2 Side Airbag Sensor Assembly RH
      *3 Front Door Wire RH
      *4 Floor Wire
      *5 Connector B
      *a

      Front view of wire harness connector

      (to No. 2 Side Airbag Sensor Assembly RH)

      Turn the ignition 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
      K41-1 (BDR+) - Body ground Always 1 MΩ or higher
      K41-2 (BDR-) - Body ground Always 1 MΩ or higher

    NG

    CHECK FRONT DOOR WIRE RH (SHORT TO GROUND) Click here

    OK

  11. CHECK NO. 2 SIDE AIRBAG SENSOR ASSEMBLY RH


    1. A004ET0E01
      Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly LH
      *2 Airbag Sensor Assembly

      Connect the connectors to the door side airbag sensor RH and airbag sensor assembly.

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

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

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

    8. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1633/81 is output. A
      DTC B1638/82 is output. B
      DTC B1633/81 or B1638/82 is not output. C

      Tech Tips

      Codes other than DTCs B1633/81 and B1638/82 may be output at this time, but they are not related to this check.

    9. Turn the ignition switch off.

    10. Disconnect the cable 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 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.


    B

    REPLACE NO. 2 SIDE AIRBAG SENSOR ASSEMBLY RH Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  12. CHECK DOOR SIDE AIRBAG SENSOR RH


    1. A004FDUE03
      Text in Illustration
      *1 Door Side Airbag Sensor LH
      *2 No. 2 Side Airbag Sensor Assembly RH

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

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

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

    7. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1633/81 or B1638/82 is not output. A
      DTC B1633/81 is output. B
      DTC B1638/82 is output. C

      Tech Tips

      Codes other than DTCs B1633/81 and B1638/82 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 (-) 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 door side airbag sensor LH and the door side airbag sensor RH 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 DOOR SIDE AIRBAG SENSOR RH Click here

  13. CHECK FRONT DOOR WIRE RH (OPEN)


    1. Disconnect the floor wire connector from the front door wire RH.

      A004E7RE01
      Text in Illustration
      *1 Door Side Airbag Sensor RH *2 No. 2 Side Airbag Sensor Assembly RH
      *3 Front Door Wire RH *4 Floor Wire
      *5 Connector D *6 Connector E
      *7 Service Wire - -
      *a

      Front view of wire harness connector

      (to Floor Wire)

      		 *b

      Front view of wire harness connector

      (to No. 2 Side Airbag Sensor Assembly RH)

      Tech Tips

      The service wire has already been inserted into connector E.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      GK2-1 (BDR+) - GK2-2 (BDR-) Always Below 1 Ω

    OK

    REPLACE FLOOR WIRE

    NG

    REPLACE FRONT DOOR WIRE RH

  14. CHECK FRONT DOOR WIRE RH (SHORT)


    1. A004EZUE01
      Text in Illustration
      *1 Door Side Airbag Sensor RH
      *2 No. 2 Side Airbag Sensor Assembly RH
      *3 Front Door Wire RH
      *4 Floor Wire
      *5 Connector D
      *a

      Front view of wire harness connector

      (to Floor Wire)

      Disconnect the floor wire connector from the front door wire RH.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      GK2-1 (BDR+) - GK2-2 (BDR-) Always 1 MΩ or higher

    OK

    REPLACE FLOOR WIRE

    NG

    REPLACE FRONT DOOR WIRE RH

  15. CHECK FRONT DOOR WIRE RH (SHORT TO B+)


    1. Turn the ignition switch off.

    2. A004EZUE02
      Text in Illustration
      *1 Door Side Airbag Sensor RH
      *2 No. 2 Side Airbag Sensor Assembly RH
      *3 Front Door Wire RH
      *4 Floor Wire
      *5 Connector D
      *a

      Front view of wire harness connector

      (to Floor Wire)

      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. Disconnect the front door wire connector from the floor wire.

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

    5. Turn the ignition switch to ON (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      GK2-1 (BDR+) - Body ground Ignition switch ON (IG) Below 1 V
      GK2-2 (BDR-) - Body ground Ignition switch ON (IG) Below 1 V

    OK

    REPLACE FLOOR WIRE

    NG

    REPLACE FRONT DOOR WIRE RH

  16. CHECK FRONT DOOR WIRE RH (SHORT TO GROUND)


    1. A004EZUE05
      Text in Illustration
      *1 Door Side Airbag Sensor RH
      *2 No. 2 Side Airbag Sensor Assembly RH
      *3 Front Door Wire RH
      *4 Floor Wire
      *5 Connector D
      *a

      Front view of wire harness connector

      (to Floor Wire)

      Disconnect the front door wire connector from the floor wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      GK2-1 (BDR+) - Body ground Always 1 MΩ or higher
      GK2-2 (BDR-) - Body ground Always 1 MΩ or higher

    OK

    REPLACE FLOOR WIRE

    NG

    REPLACE FRONT DOOR WIRE RH