AIRBAG SYSTEM, Diagnostic DTC:B1635/24, B1695/16

DTC Code DTC Name
B1635/24 Rear Airbag Sensor LH Circuit Malfunction
B1695/16 Door Side Airbag Sensor LH Malfunction

DESCRIPTION

The rear airbag sensor LH and No. 2 side airbag sensor assembly LH consists of a safing sensor, diagnostic circuit, lateral deceleration sensor, etc.

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

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

DTC B1695/16 is stored when a malfunction is detected in the No. 2 side airbag sensor assembly LH circuit.

DTC Code Detection Condition Trouble Area
B1635/24

One of the following conditions is met:


  • The airbag sensor assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the rear airbag sensor LH circuit for 2 seconds.

  • A rear airbag sensor LH malfunction.

  • A No. 2 side airbag sensor assembly LH malfunction.

  • An airbag sensor malfunction.

  • Rear airbag sensor LH

  • No. 2 side airbag sensor assembly LH

  • Floor wire

  • Front door wire LH

  • Airbag sensor assembly
B1695/16

One of the following conditions is met:


  • The airbag sensor assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the No. 2 side airbag sensor assembly LH circuit for 2 seconds.

  • A rear airbag sensor LH malfunction.

  • A No. 2 side airbag sensor assembly LH malfunction.

  • An airbag sensor malfunction.

  • Rear airbag sensor LH

  • No. 2 side airbag sensor assembly LH

  • Floor wire

  • Front door wire LH

  • Airbag sensor assembly

WIRING DIAGRAM

A004NQQE11
*a Airbag Sensor Assembly
*b Rear Airbag Sensor LH
*c No. 2 Side Airbag Sensor Assembly LH

CAUTION / NOTICE / HINT

Note


  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice 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.

PROCEDURE


  1. CHECK CONNECTION OF CONNECTORS


    1. Turn the ignition switch off.

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

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

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  2. CHECK CONNECTORS


    1. A004NNRE03
      Text in Illustration
      *1 Rear Airbag Sensor LH
      *2 Airbag Sensor Assembly
      *3 Floor Wire

      Disconnect the connectors from the airbag sensor assembly and rear airbag sensor LH.

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

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE FLOOR WIRE

    OK

  3. CHECK FLOOR WIRE


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

      A004OOAE01
      Text in Illustration
      *1 Rear Airbag Sensor LH *2 Airbag Sensor Assembly
      *3 Floor Wire *4 Connector C
      *5 Connector B *6 Service Wire
      *a

      Front view of wire harness connector

      (to Rear Airbag Sensor LH)

      		 *b

      Rear view of wire harness connector

      (to Airbag Sensor Assembly)

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G63-4 (BCL+) - Body ground Ignition switch ON Below 1 V
      G63-3 (BCL-) - Body ground Ignition switch ON Below 1 V

    4. Turn the ignition switch off.

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

    6. Using a service wire, connect terminals 24 (BBL+) and 23 (BBL-) of connector B.

      Note

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G63-4 (BCL+) - G63-3 (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
      G63-4 (BCL+) - G63-3 (BCL-) Always 1 MΩ or higher
      G63-4 (BCL+) - Body ground Always 1 MΩ or higher
      G63-3 (BCL-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE FLOOR WIRE

    OK

  4. CHECK REAR AIRBAG SENSOR LH


    1. A004MWVE37
      Text in Illustration
      *1 Rear Airbag Sensor LH
      *2 Airbag Sensor Assembly

      Connect the connectors to the airbag sensor assembly.

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

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

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

    8. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1630/23, B1635/24, B1690/15 or B1695/16 is not output A
      DTC B1630/23 or B1690/15 is output (for Sedan) B
      DTC B1630/23 or B1690/15 is output (for Wagon) C
      DTC B1635/24 or B1695/16 is output D

      Tech Tips

      Codes other than DTC B1630/23, B1635/24, B1690/15 and B1695/16 may be output at this time, but they are not related to this check.

    9. Turn the ignition switch off.

    10. Disconnect the cable from the negative (-) battery terminal, 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 Click here

    B

    REPLACE REAR AIRBAG SENSOR LH Click here

    C

    REPLACE REAR AIRBAG SENSOR LH Click here

    D

  5. CHECK CONNECTION OF CONNECTOR


    1. Check that the connector is properly connected to the No. 2 side airbag sensor assembly LH.

      OK
      The connector is properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  6. CHECK CONNECTOR


    1. A004R00E04
      Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly LH
      *2 Rear Airbag Sensor LH

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

    2. Check that the connector (on the No. 2 side airbag sensor assembly LH side) is not damaged.

      OK
      The connector is not deformed or damaged.

    NG

    REPLACE HARNESS AND CONNECTOR

    OK

  7. CHECK NO. 2 SIDE AIRBAG SENSOR ASSEMBLY LH CIRCUIT


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

      A004O9WE02
      Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly LH *2 Rear Airbag Sensor LH
      *3 Connector E *4 Connector B
      *5 Service Wire - -
      *a

      Front view of wire harness connector

      (to No. 2 Side Airbag Sensor Assembly LH)

      		 *b

      Front view of wire harness connector

      (to Rear Airbag Sensor LH)

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G63-1 (BDL+) - Body ground Ignition switch ON Below 1 V
      G63-2 (BDL-) - Body ground Ignition switch ON Below 1 V

    4. Turn the ignition switch off.

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

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

      Note

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G63-1 (BDL+) - G63-2 (BDL-) Always Below 1 Ω

    8. Disconnect the service wire from connector E.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G63-1 (BDL+) - G63-2 (BDL-) Always 1 MΩ or higher
      G63-1 (BDL+) - Body ground Always 1 MΩ or higher
      G63-2 (BDL-) - Body ground Always 1 MΩ or higher

    NG

    CHECK FLOOR WIRE Click here

    OK

  8. CHECK FOR DTC

    A004TTHE11
    Text in Illustration
    *1 No. 2 Side Airbag Sensor Assembly LH
    *2 Rear Airbag Sensor LH

    1. Connect the connector to the rear airbag sensor LH.

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

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

    7. Check for DTCs Click here.

      OK
      DTC B1635/24 or B1695/16 is output.

      Tech Tips

      Codes other than B1635/24 and B1695/16 may be output at this time, but they are not related to this check.


    OK

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    NG

    REPLACE NO. 2 SIDE AIRBAG SENSOR ASSEMBLY LH Click here

  9. CHECK FLOOR WIRE


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

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

      A004MPPE02
      Text in Illustration
      *1 No. 2 Side Airbag Sensor Assembly LH *2 Rear Airbag Sensor LH
      *3 Front Door Wire LH *4 Floor Wire
      *5 Connector C *6 Connector B
      *7 Service Wire - -
      *a

      Front view of wire harness connector

      (to Front Door Wire LH)

      		 *b

      Front view of wire harness connector

      (to Rear Airbag Sensor LH)

    3. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G63-1 (BDL+) - Body ground Ignition switch ON Below 1 V
      G63-2 (BDL-) - Body ground Ignition switch ON Below 1 V

    5. Turn the ignition switch off.

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

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

      Note

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G63-1 (BDL+) - G63-2 (BDL-) Always Below 1 Ω

    9. Disconnect the service wire from connector C.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G63-1 (BDL+) - G63-2 (BDL-) Always 1 MΩ or higher
      G63-1 (BDL+) - Body ground Always 1 MΩ or higher
      G63-2 (BDL-) - Body ground Always 1 MΩ or higher

    OK

    REPLACE FRONT DOOR WIRE LH

    NG

    REPLACE FLOOR WIRE