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 airbag assembly RH, curtain shield airbag assembly RH, front seat outer belt assembly RH and rear seat outer belt assembly RH*) is composed of the airbag sensor assembly, side airbag sensor assembly RH and No. 2 side airbag sensor assembly 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 airbag sensor assembly RH.

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

*: w/ Rear Pretensioner

WIRING DIAGRAM

Refer to DTCs B1622/81, B1623/81, B1632/81, B1633/81 and B1642/81 Click here.

INSPECTION PROCEDURE

Note

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.

PROCEDURE


  1. CHECK SIDE AIRBAG SENSOR ASSEMBLY RH


    1. A003ZKZE08
      Text in Illustration
      *1 Side Airbag Sensor Assembly LH
      *2 Airbag Sensor Assembly

      Turn the power 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 LH and connect the connectors.

    4. Connect the cable to the negative (-) auxiliary 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 B1620/21 and B1625/22 are not output. A
      DTC B1625/22 is output. B
      DTC B1620/21 is output. C

      Tech Tips

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

    10. Turn the power 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 LH to their original positions and connect the connectors.


    B

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH Click here

    C

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here