AIRBAG SYSTEM, Diagnostic DTC:B1620/21

DTC Code DTC Name
B1620/21 Side Airbag Sensor RH Circuit Malfunction

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 rear airbag sensor RH. The side airbag sensor assembly RH detects impacts to the vehicle and sends signals to the airbag sensor assembly to determine if the airbag should be deployed. DTC B1620/21 is stored when a malfunction is detected in the side collision sensor RH circuit.

DTC No. DTC Detection Condition Trouble Area
B1620/21

  • Side airbag sensor assembly RH malfunction

  • Airbag sensor assembly malfunction

  • Side airbag sensor assembly RH

  • Airbag sensor assembly

WIRING DIAGRAM

Click here

PROCEDURE


  1. CHECK SIDE AIRBAG SENSOR ASSEMBLY RH

    A01V0Z9E07
    Text in Illustration
    *1 Side Airbag Sensor assembly LH
    *2 Airbag Sensor Assembly

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

    4. Connect the negative (-) terminal cable to the auxiliary battery, and wait for at least 2 seconds.

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

    9. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1620/21 and B1625/22 are not output. A
      DTC B1625/22 is output. B
      DTC B1620/21 is output. C

      Tech Tips

      DTCs other than B1620/21 and B1625/22 may be output at this time, but they are not related to this check.

    10. Turn the ignition switch off.

    11. 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.

    12. Return the side airbag sensor assembly RH and the 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 SIDE AIRBAG SENSOR ASSEMBLY RH Click here

    C

    REPLACE AIRBAG SENSOR ASSEMBLY Click here