AIRBAG SYSTEM, Diagnostic DTC:B1635/24

DTC Code DTC Name
B1635/24 Rear Airbag Sensor LH Circuit Malfunction

DESCRIPTION

The side collision sensor LH circuit (to determine deployment of the front seat airbag assembly LH, rear seat airbag assembly LH, curtain shield airbag assembly LH and front seat outer belt assembly LH) is composed of the airbag ECU assembly, side airbag sensor assembly LH and rear airbag sensor LH.

The side airbag sensor assembly LH and rear airbag sensor LH detect impacts to the vehicle and send signals to the airbag ECU assembly to determine if the airbags and pretensioner should be deployed.

DTC B1635/24 is stored when a malfunction is detected in the rear airbag sensor LH.

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

Any of the following conditions is met:


  • Rear airbag sensor LH malfunction

  • Airbag ECU assembly malfunction

  • Rear airbag sensor LH

  • Airbag ECU assembly

 Does not apply to test/check mode
DTC Detection Conditions
Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition - - -
Malfunction Status Rear airbag sensor LH malfunction ○ -
Airbag ECU assembly malfunction - ○
Detection Time - -
Number of Trips 1 trip 1 trip

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

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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 airbag ECU assembly, refer to initialization.

    Click here

PROCEDURE


  1. CHECK REAR AIRBAG SENSOR LH


    1. B002EJAC10
      *1 Rear Airbag Sensor RH
      *2 Airbag ECU Assembly

      Turn the engine switch off.

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

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

    4. Connect the cable to the negative (-) battery terminal.

    5. Clear the DTCs stored in memory.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    6. Turn the engine switch off.

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

    8. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes

      Tech Tips

      Codes other than DTCs B1630/23 and B1635/24 may be output at this time, but they are not related to this check.

      Result
      Result Proceed to
      DTC B1635/24 is output. A
      DTC B1630/23 is output. B
      DTCs B1630/23 and B1635/24 are not output. C

    9. Turn the engine switch off.

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

    11. Return the rear airbag sensor LH and RH to their original positions and connect the connectors.


    A

    REPLACE AIRBAG ECU ASSEMBLY Click here

    B

    REPLACE REAR AIRBAG SENSOR LH Click here

    C

    USE SIMULATION METHOD TO CHECK Click here