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, curtain shield airbag assembly LH and front seat outer belt assembly LH) consists of the airbag sensor assembly, side airbag sensor assembly LH and side No. 2 airbag sensor assembly LH.

The side airbag sensor assembly LH and side No. 2 airbag sensor assembly LH detect impacts to the vehicle and send signals to the airbag sensor assembly to determine if the airbags and pretensioner should be deployed.

DTC B1635/24 is stored when a malfunction is detected in the side collision sensor LH circuit.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Test Mode / Check Mode

B1635/24

Rear Airbag Sensor LH Circuit Malfunction

  • The airbag sensor assembly detects a line short to ground or B+, or an open in the side collision sensor LH circuit.

  • Side airbag sensor assembly LH malfunction

  • Side No. 2 airbag sensor assembly LH malfunction

  • Airbag sensor assembly malfunction

  • Floor wire

  • Front door wire LH*1

  • Side airbag sensor assembly LH

  • Side No. 2 airbag sensor assembly LH

  • Airbag sensor assembly

Does not apply to test/check mode

  • *1: for 3 Door

WIRING DIAGRAM

  1. for 3 Door:

    C303991E02

  2. for 5 Door:

    C239250E54

CAUTION / NOTICE / HINT

Note:

After turning the ignition 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 hereClick here

PROCEDURE

  1. CHECK VEHICLE CONDITION

    1. Choose the model to be inspected.

    Result

    Result

    Proceed to

    for 3 Door

    A

    for 5 Door

    B
    B

    CHECK CONNECTORSClick here

    A

  2. CHECK CONNECTORS

    1. Turn the ignition switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    3. Check that the connectors are properly connected to the side airbag sensor assembly LH and side No. 2 airbag sensor assembly LH. Also check that the connectors that link the front door wire LH and floor wire are properly connected.

      OK

      The connectors are properly connected.

      Tip:

      If the connectors are not properly connected, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the side airbag sensor assembly LH and side No. 2 airbag sensor assembly LH. Also disconnect the connectors that link the front door wire LH and floor wire.

    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE WIRE HARNESS

    OK

  3. CHECK WIRE HARNESS (OPEN)

    1. C303990C02

      *1

      Side No. 2 Airbag Sensor Assembly LH

      *2

      Side Airbag Sensor Assembly LH

      *3

      Service Wire

      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)

      *b

      Front view of wire harness connector

      (to Side No. 2 Airbag Sensor Assembly LH)

      Connect the connectors that link the front door wire LH and floor wire.

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

      Note:

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

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H8-1 (BCL+) - H8-2 (BCL-)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    CHECK FLOOR WIRE (OPEN)Click here

    OK

  4. CHECK WIRE HARNESS (SHORT TO B+)

    1. C238394C16

      *1

      Side No. 2 Airbag Sensor Assembly LH

      *2

      Side Airbag Sensor Assembly LH

      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)

      Disconnect the service wire from connector E.

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

    3. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      H8-1 (BCL+) - Body ground

      Ignition switch ON

      Below 1 V

      H8-2 (BCL-) - Body ground

      Ignition switch ON

      Below 1 V

    5. Turn the ignition switch off.

    6. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    Result

    Proceed to

    OK

    NG
    NG

    CHECK FLOOR WIRE (SHORT TO B+)Click here

    OK

  5. CHECK WIRE HARNESS (SHORT TO GROUND)

    1. C238394C16

      *1

      Side No. 2 Airbag Sensor Assembly LH

      *2

      Side Airbag Sensor Assembly LH

      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H8-1 (BCL+) - Body ground

      Always

      1 MΩ or higher

      H8-2 (BCL-) - Body ground

      Always

      1 MΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    CHECK FLOOR WIRE (SHORT TO GROUND)Click here

    OK

  6. CHECK SIDE NO. 2 AIRBAG SENSOR ASSEMBLY LH

    1. C238395C02

      *1

      Side No. 2 Airbag Sensor Assembly RH

      *2

      Side Airbag Sensor Assembly LH

      Connect the connector to the side airbag sensor assembly LH.

    2. Interchange the side No. 2 airbag sensor assembly LH with RH and connect the connectors.

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

    4. Clear the DTCs stored in memory.

      Click here

      Body Electrical > SRS Airbag > Clear DTCs

    5. Turn the ignition switch off.

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

    7. Check for DTCs.

      Click here

      Body Electrical > SRS Airbag > Trouble Codes

      Tip:

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

    8. Turn the ignition switch off.

    9. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    10. Return the side No. 2 airbag sensor assembly LH and RH to their original positions and connect the connectors.

    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
    B

    REPLACE SIDE NO. 2 AIRBAG SENSOR ASSEMBLY LH

    Click here

    C

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick here

    A

  7. CHECK SIDE AIRBAG SENSOR ASSEMBLY LH

    1. C303989C01

      *1

      Side Airbag Sensor Assembly RH

      *2

      Airbag Sensor Assembly

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

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

    3. Clear the DTCs stored in memory.

      Click here

      Body Electrical > SRS Airbag > Clear DTCs

    4. Turn the ignition switch off.

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

    6. Check for DTCs.

      Click here

      Body Electrical > SRS Airbag > Trouble Codes

      Tip:

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

    7. Turn the ignition switch off.

    8. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    9. Return the side airbag sensor assembly LH and RH to their original positions and connect the connectors.

    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
    A

    REPLACE AIRBAG SENSOR ASSEMBLY

    Click here

    B

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH

    Click here

    C

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick here

  8. CHECK FLOOR WIRE (SHORT TO GROUND)

    1. C303987C02

      *1

      Side No. 2 Airbag Sensor Assembly LH

      *2

      Side Airbag Sensor Assembly LH

      *3

      Floor Wire

      *4

      Front Door Wire LH

      *a

      Front view of wire harness connector

      (to Front Door Wire LH)

      Disconnect the floor wire connector from the front door wire LH.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      HK1-2 (BCL+) - Body ground

      Always

      1 MΩ or higher

      HK1-4 (BCL-) - Body ground

      Always

      1 MΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE FRONT DOOR WIRE LH

    NG

    REPLACE FLOOR WIRE

  9. CHECK FLOOR WIRE (SHORT TO B+)

    1. C303987C02

      *1

      Side No. 2 Airbag Sensor Assembly LH

      *2

      Side Airbag Sensor Assembly LH

      *3

      Floor Wire

      *4

      Front Door Wire LH

      *a

      Front view of wire harness connector

      (to Front Door Wire LH)

      Disconnect the floor wire connector from the front door wire LH.

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

    3. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      HK1-2 (BCL+) - Body ground

      Ignition switch ON

      Below 1 V

      HK1-4 (BCL-) - Body ground

      Ignition switch ON

      Below 1 V

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE FRONT DOOR WIRE LH

    NG

    REPLACE FLOOR WIRE

  10. CHECK FLOOR WIRE (OPEN)

    1. C303988C02

      *1

      Side No. 2 Airbag Sensor Assembly LH

      *2

      Side Airbag Sensor Assembly LH

      *3

      Floor Wire

      *4

      Front Door Wire LH

      *5

      Service Wire

      *a

      Front view of wire harness connector

      (to Front Door Wire LH)

      *b

      Front view of wire harness connector

      (to Side No. 2 Airbag Sensor Assembly LH)

      Disconnect the floor wire connector from the front door wire LH.

      Tip:

      The service wire has already been inserted into connector E.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      HK1-2 (BCL+) - HK1-4 (BCL-)

      Always

      Below 1 Ω

    3. Disconnect the service wire from connector E.

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE FRONT DOOR WIRE LH

    NG

    REPLACE FLOOR WIRE

  11. CHECK CONNECTORS

    1. Turn the ignition switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    3. Check that the connectors are properly connected to the side airbag sensor assembly LH and side No. 2 airbag sensor assembly LH.

      OK

      The connectors are properly connected.

      Tip:

      If the connectors are not properly connected, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the side airbag sensor assembly LH and side No. 2 airbag sensor assembly LH.

    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE FLOOR WIRE

    OK

  12. CHECK FLOOR WIRE (OPEN)

    1. C256981C13

      *1

      Side No. 2 Airbag Sensor Assembly LH

      *2

      Side Airbag Sensor Assembly LH

      *3

      Floor Wire

      *4

      Service Wire

      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)

      *b

      Front view of wire harness connector

      (to Side No. 2 Airbag Sensor Assembly LH)

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

      Note:

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

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      K22-1 (BCL+) - K22-2 (BCL-)

      Always

      Below 1 Ω

    3. Disconnect the service wire from connector C.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE FLOOR WIRE

    OK

  13. CHECK FLOOR WIRE (SHORT TO B+)

    1. C238222C38

      *1

      Side No. 2 Airbag Sensor Assembly LH

      *2

      Side Airbag Sensor Assembly LH

      *3

      Floor Wire

      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)

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

    2. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      K22-1 (BCL+) - Body ground

      Ignition switch ON

      Below 1 V

      K22-2 (BCL-) - Body ground

      Ignition switch ON

      Below 1 V

    4. Turn the ignition switch off.

    5. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE FLOOR WIRE

    OK

  14. CHECK FLOOR WIRE (SHORT TO GROUND)

    1. C238222C38

      *1

      Side No. 2 Airbag Sensor Assembly LH

      *2

      Side Airbag Sensor Assembly LH

      *3

      Floor Wire

      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      K22-1 (BCL+) - Body ground

      Always

      1 MΩ or higher

      K22-2 (BCL-) - Body ground

      Always

      1 MΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE FLOOR WIRE

    OK

  15. CHECK SIDE NO. 2 AIRBAG SENSOR ASSEMBLY LH

    1. C238223C02

      *1

      Side No. 2 Airbag Sensor Assembly RH

      *2

      Side Airbag Sensor Assembly LH

      Connect the connector to the side airbag sensor assembly LH.

    2. Interchange the side No. 2 airbag sensor assembly LH with RH and connect the connectors.

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

    4. Clear the DTCs stored in memory.

      Click here

      Body Electrical > SRS Airbag > Clear DTCs

    5. Turn the ignition switch off.

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

    7. Check for DTCs.

      Click here

      Body Electrical > SRS Airbag > Trouble Codes

      Tip:

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

    8. Turn the ignition switch off.

    9. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    10. Return the side No. 2 airbag sensor assembly LH and RH to their original positions and connect the connectors.

    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
    B

    REPLACE SIDE NO. 2 AIRBAG SENSOR ASSEMBLY LH

    Click here

    C

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick here

    A

  16. CHECK SIDE AIRBAG SENSOR ASSEMBLY LH

    1. C303996C01

      *1

      Side Airbag Sensor Assembly RH

      *2

      Airbag Sensor Assembly

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

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

    3. Clear the DTCs stored in memory.

      Click here

      Body Electrical > SRS Airbag > Clear DTCs

    4. Turn the ignition switch off.

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

    6. Check for DTCs.

      Click here

      Body Electrical > SRS Airbag > Trouble Codes

      Tip:

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

    7. Turn the ignition switch off.

    8. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    9. Return the side airbag sensor assembly LH and RH to their original positions and connect the connectors.

    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
    A

    REPLACE AIRBAG SENSOR ASSEMBLY

    Click here

    B

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH

    Click here

    C

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick here