AIRBAG SYSTEM, Diagnostic DTC:B1635/24

DTC Code DTC Name
B1635/24 Front Passenger Side Rear Airbag Sensor Malfunction

DESCRIPTION

The rear airbag sensor (front passenger side) consists of the safing sensor, the diagnostic circuit, the lateral deceleration sensor, etc.

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

DTC B1635/24 is recorded when a malfunction is detected in the rear airbag sensor (front passenger side) circuit.

DTC Code Detection Condition Trouble Area
B1635/24

Both conditions below are met:


  • Front passenger side - rear airbag sensor malfunction

  • Center airbag sensor malfunction

  • Side airbag sensor (front passenger side)

  • Rear airbag sensor (front passenger side)

  • Floor wire

  • Center airbag sensor assembly

WIRING DIAGRAM

A01DXKGE16
A01DXKGE15

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK VEHICLE CONDITION


    1. Check vehicle condition.

      Result
      Result Proceed to
      for LHD A
      for RHD B

    B

    CHECK CONNECTION OF CONNECTORS Click here

    A

  2. CHECK CONNECTION OF CONNECTORS


    1. Turn the ignition switch OFF.

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

    3. Check that the connectors are properly connected to the side airbag sensor RH and rear airbag sensor RH.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  3. CHECK CONNECTORS


    1. Disconnect the connectors from the side airbag sensor RH and rear airbag sensor RH.

    2. Check that the connectors (on the side airbag sensor RH side and rear airbag sensor RH side) are not damaged.

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE FLOOR WIRE

    OK

  4. CHECK REAR AIRBAG SENSOR RH CIRCUIT

    A01E1BSE08

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

    2. Turn the ignition switch ON.

    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      R13-2 (BCR+) - Body ground Ignition switch ON Below 1 V
      R13-1 (BCR-) - Body ground

    4. Turn the ignition switch OFF.

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

    6. Using a service wire, connect terminals 1 (BCR+) and 2 (BCR-) of connector B.

      Note

      Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.

    7. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      R13-2 (BCR+) - R13-1 (BCR-) Always Below 1 Ω

    8. Disconnect the service wire from connector B.

    9. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      R13-2 (BCR+) - R13-1 (BCR-) Always 1 MΩ or higher
      R13-2 (BCR+) - Body ground
      R13-1 (BCR-) - Body ground

    NG

    REPLACE FLOOR WIRE

    OK

  5. CHECK REAR AIRBAG SENSOR RH

    A01E2L3E01

    1. Connect the connectors to the side airbag sensor RH.

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

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

    4. Turn the ignition switch ON, and wait for at least 60 seconds.

    5. Clear the DTCs stored in the memory Click here.

    6. Turn the ignition switch OFF.

    7. Turn the ignition switch ON, and wait for at least 60 seconds.

    8. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1630 and B1635 are not output A
      DTC B1630 is output B
      DTC B1635 is output C

      Tech Tips

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

    9. Turn the ignition switch OFF.

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

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


    A

    USE SIMULATION METHOD TO CHECK

    B

    REPLACE REAR AIRBAG SENSOR RH

    C

  6. CHECK SIDE AIRBAG SENSOR RH

    A01DXCSE25

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

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

    3. Turn the ignition switch ON, and wait for at least 60 seconds.

    4. Clear the DTCs stored in the memory Click here.

    5. Turn the ignition switch OFF.

    6. Turn the ignition switch ON, and wait for at least 60 seconds.

    7. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1630 and B1635 are not output A
      DTC B1635 is output B
      DTC B1630 is output C

      Tech Tips

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

    8. Turn the ignition switch OFF.

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

    10. Return the side airbag sensor LH and RH to their original positions and connect the connectors to them.


    A

    USE SIMULATION METHOD TO CHECK

    B

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY

    C

    REPLACE SIDE AIRBAG SENSOR RH

  7. CHECK CONNECTION OF CONNECTORS


    1. Turn the ignition switch OFF.

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

    3. Check that the connectors are properly connected to the side airbag sensor LH and rear airbag sensor LH.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  8. CHECK CONNECTORS


    1. Disconnect the connectors from the side airbag sensor LH and rear airbag sensor LH.

    2. Check that the connectors (on the side airbag sensor LH side and rear airbag sensor LH side) are not damaged.

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE FLOOR WIRE

    OK

  9. CHECK REAR AIRBAG SENSOR LH CIRCUIT

    A01E1BSE09

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

    2. Turn the ignition switch ON.

    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      R14-2 (BCL+) - Body ground Ignition switch ON Below 1 V
      R14-1 (BCL-) - Body ground

    4. Turn the ignition switch OFF.

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

    6. Using a service wire, connect terminals 2 (BCL-) and 1 (BCL+) of connector B.

      Note

      Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.

    7. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      R14-2 (BCL+) - R14-1 (BCL-) Always Below 1 Ω

    8. Disconnect the service wire from connector B.

    9. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      R14-2 (BCL+) - R14-1 (BCL-) Always 1 MΩ or higher
      R14-2 (BCL+) - Body ground
      R14-1 (BCL-) - Body ground

    NG

    REPLACE FLOOR WIRE

    OK

  10. CHECK REAR AIRBAG SENSOR LH

    A01E2L3E02

    1. Connect the connectors to the side airbag sensor LH.

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

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

    4. Turn the ignition switch ON, and wait for at least 60 seconds.

    5. Clear the DTCs stored in the memory Click here.

    6. Turn the ignition switch OFF.

    7. Turn the ignition switch ON, and wait for at least 60 seconds.

    8. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1630 and B1635 are not output A
      DTC B1630 is output B
      DTC B1635 is output C

      Tech Tips

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

    9. Turn the ignition switch OFF.

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

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


    A

    USE SIMULATION METHOD TO CHECK

    B

    REPLACE REAR AIRBAG SENSOR LH

    C

  11. CHECK SIDE AIRBAG SENSOR LH

    A01DXCSE25

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

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

    3. Turn the ignition switch ON, and wait for at least 60 seconds.

    4. Clear the DTCs stored in the memory Click here.

    5. Turn the ignition switch OFF.

    6. Turn the ignition switch ON, and wait for at least 60 seconds.

    7. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1630 and B1635 are not output A
      DTC B1635 is output B
      DTC B1630 is output C

      Tech Tips

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

    8. Turn the ignition switch OFF.

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

    10. Return the side airbag sensor RH and LH to their original positions and connect the connectors to them.


    A

    USE SIMULATION METHOD TO CHECK

    B

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY

    C

    REPLACE SIDE AIRBAG SENSOR LH