AIRBAG SYSTEM, Diagnostic DTC:B1620/21, B1625/22

DTC Code DTC Name
B1620/21 Side Airbag Sensor RH Circuit Malfunction
B1625/22 Side Airbag Sensor LH Circuit Malfunction

DESCRIPTION

The side airbag sensor assembly consists of a safing sensor, diagnostic circuit, lateral deceleration sensor, etc.

If the center airbag sensor assembly receives signals from the lateral deceleration sensor, it determines whether the SRS should be activated.

DTC B1620/21 or B1625/22 is stored when a malfunction is detected in the side airbag sensor assembly circuit.

DTC Code DTC Detection Condition Trouble Area
B1620/21

Either condition is met:


  • A side airbag sensor assembly RH malfunction.

  • A center airbag sensor assembly malfunction.

  • Side airbag sensor assembly RH

  • Center airbag sensor assembly
B1625/22

Either condition is met:


  • A side airbag sensor assembly LH malfunction.

  • A center airbag sensor assembly malfunction.

  • Side airbag sensor assembly LH

  • Center airbag sensor assembly

WIRING DIAGRAM

A01FFG2E10
A01FFG2E11

INSPECTION PROCEDURE

Note


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

  • When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected Click here.

PROCEDURE


  1. CHECK FOR DTC


    1. Turn the engine switch on (IG).

    2. Clear the DTCs stored in memory Click here.

    3. Turn the engine switch off.

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

    5. 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

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


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    CHECK SIDE AIRBAG SENSOR ASSEMBLY LH Click here

    C

  2. CHECK SIDE AIRBAG SENSOR ASSEMBLY RH


    1. A01FFVVE16
      Text in Illustration
      *1 Side Airbag Sensor Assembly LH
      *2 Rear Airbag Sensor RH

      Turn the engine switch off.

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

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

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

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

    6. Clear the DTCs stored in memory Click here.

    7. Turn the engine switch off.

    8. Turn the engine switch on (IG), and wait for at least 90 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

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

    10. Turn the engine switch off.

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

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

  3. CHECK SIDE AIRBAG SENSOR ASSEMBLY LH


    1. A01FFVVE16
      Text in Illustration
      *1 Side Airbag Sensor Assembly RH
      *2 Rear Airbag Sensor LH

      Turn the engine switch off.

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

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

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

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

    6. Clear the DTCs stored in memory Click here.

    7. Turn the engine switch off.

    8. Turn the engine switch on (IG), and wait for at least 90 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

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

    10. Turn the engine switch off.

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

    12. Return the side airbag sensor assembly RH and 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 LH Click here

    C

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here