AIRBAG SYSTEM, Diagnostic DTC:B1635/24, B1637/82

DTC Code DTC Name
B1635/24 Rear Airbag Sensor LH Circuit Malfunction
B1637/82 Lost Communication with Rear Airbag Sensor LH

DESCRIPTION

The rear airbag sensor assembly LH consists of a lateral deceleration sensor, etc.

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

These DTCs are stored when a malfunction is detected in the rear airbag sensor assembly LH circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area
B1635/24 Rear Airbag Sensor LH Circuit Malfunction

Either condition is met:


  • A side airbag sensor assembly LH malfunction.

  • An airbag sensor assembly malfunction.

  • Side airbag sensor assembly LH

  • Airbag sensor assembly
B1637/82 Lost Communication with Rear Airbag Sensor LH

Either condition is met:


  • A side airbag sensor assembly LH malfunction.

  • An airbag sensor assembly malfunction.

  • Side airbag sensor assembly LH

  • Airbag sensor assembly

WIRING DIAGRAM

A01MHQWE02
*a Side Airbag Sensor Assembly LH
*b Door Side Airbag Sensor LH
*c Rear Airbag Sensor Assembly LH
*d Airbag Sensor Assembly

CAUTION / NOTICE / HINT

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

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

    Click here

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

    Click here

PROCEDURE


  1. CHECK DTC


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

    2. Clear the DTCs stored in memory.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    3. Turn the power switch off.

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

    5. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Result Proceed to
      DTC B1635/24 or B1637/82 is output A
      DTC B1635/24 or B1637/82 is not output B

      Tech Tips

      Codes other than DTCs B1635/24 and B1637/82 may be output at this time, but they are not related to this check.


    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK REAR AIRBAG SENSOR ASSEMBLY LH


    1. A01MJ3MC01
      *1 Rear Airbag Sensor Assembly RH
      *2 Side Airbag Sensor Assembly LH

      Turn the power switch off.

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

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

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

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

    6. Clear the DTCs stored in memory.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    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


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Result Proceed to
      DTC B1630/23 or B1632/81 is output A
      DTC B1635/24 or B1637/82 is output B
      DTCs B1630/23, B1632/81, B1635/24 and B1637/82 are not output C

      Tech Tips

      Codes other than DTCs B1630/23, B1632/81, B1635/24 and B1637/82 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, and wait for at least 90 seconds.

    12. Return the rear airbag sensor assembly RH and LH to their original positions and connect the connectors to them.


    A

    REPLACE REAR AIRBAG SENSOR ASSEMBLY LH Click here

    B

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    C

    USE SIMULATION METHOD TO CHECK Click here