AIRBAG SYSTEM, Diagnostic DTC:B1635/24, B1637/82, B1690/15, B1692/81

DTC Code DTC Name
B1635/24 Rear Airbag Sensor LH Circuit Malfunction
B1637/82 Lost Communication with Rear Airbag Sensor LH
B1690/15 Door Side Airbag Sensor RH Malfunction
B1692/81 Lost Communication with Door Side Airbag Sensor RH

DESCRIPTION

Tech Tips

"Door side airbag sensor RH" refers to the side airbag sensor RH.


DTC Code DTC Detection Condition Trouble Area
B1635/24

When one of the following conditions is met:


  • A side airbag sensor LH malfunction.

  • A center airbag sensor malfunction.

  • Rear airbag sensor LH

  • Center airbag sensor assembly
B1637/82

When one of the following conditions is met:


  • The center airbag sensor receives a line short circuit signal, an open circuit signal, a short circuit to B+ signal in the circuit for the side collision sensor LH (to determine deployment of the front seat airbag LH, rear seat side airbag LH and curtain shield airbag LH) for 2 seconds.

  • A side airbag sensor LH malfunction.

  • A center airbag sensor malfunction.

  • Rear airbag sensor LH

  • Center airbag sensor assembly
B1690/15

When one of the following conditions is met:


  • A side airbag sensor RH malfunction.

  • A center airbag sensor malfunction.

  • Side airbag sensor RH

  • Center airbag sensor assembly
B1692/81

When one of the following conditions is met:


  • The center airbag sensor receives a line short circuit signal, an open circuit signal, a short circuit to B+ signal in the circuit for the side collision sensor RH (to determine deployment of the front seat airbag RH, rear seat side airbag RH and curtain shield airbag RH) for 2 seconds.

  • A side airbag sensor RH malfunction.

  • A center airbag sensor malfunction.

  • Side airbag sensor RH

  • Center airbag sensor assembly

WIRING DIAGRAM

B001A1HE05
for RH Side
*a Side Airbag Sensor RH
*b Rear Airbag Sensor RH
*c Center Airbag Sensor
B001AHYE36
for LH Side
*a Rear Airbag Sensor LH
*b Side Airbag Sensor LH
*c Center Airbag Sensor

CAUTION / NOTICE / HINT

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.

  • After replacing the center airbag sensor assembly, refer to initialization Click here.

PROCEDURE


  1. CHECK FOR DTC


    1. Turn the engine switch on (IG).

    2. Clear the DTCs stored in the 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 B1635, B1637, B1690 and B1692 are not output A
      DTC B1635 or B1637 is output B
      DTC B1690 or B1692 is output C

      Tech Tips

      Codes other than DTC B1635, B1637, B1690 and B1692 may be output at this time, but they are not related to this check.


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    CHECK REAR AIRBAG SENSOR LH Click here

    C

  2. CHECK SIDE AIRBAG SENSOR RH

    B0019Z3E10
    *1 Center Airbag Sensor
    *2 Side Airbag Sensor LH

    1. 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 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 the memory Click here.

    7. Turn the engine switch off.

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

    9. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1695, B1697, B1690 and B1692 are not output A
      DTC B1695 or B1697 is output B
      DTC B1690 or B1692 is output C

      Tech Tips

      Codes other than DTC B1690, B1692, B1695 and B1697 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 RH and LH to their original positions and connect the connectors to them.


    C

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE SIDE AIRBAG SENSOR RH Click here

  3. CHECK REAR AIRBAG SENSOR LH

    B0018Y6E20
    *1 Rear Airbag Sensor LH
    *2 Center Airbag Sensor

    1. Turn the engine switch off.

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

    3. Temporarily replace the rear airbag sensor LH with a new one.

    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 the memory Click here.

    7. Turn the engine switch off.

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

    9. Check for DTCs Click here.

      OK
      DTC B1635 and B1637 are not output.

      Tech Tips

      Codes other than DTC B1635 and B1637 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 RH and LH to their original positions and connect the connectors to them.


    OK

    REPLACE REAR AIRBAG SENSOR LH Click here

    NG

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here