AIRBAG SYSTEM, Diagnostic DTC:B1830/57, B1831/57, B1832/57, B1833/57

DTC Code DTC Name
B1830/57 Short in Driver Side Curtain Shield Squib Circuit
B1831/57 Open in Driver Side Curtain Shield Squib Circuit
B1832/57 Short to GND in Driver Side Curtain Shield Squib Circuit
B1833/57 Short to B+ in Driver Side Curtain Shield Squib Circuit

DESCRIPTION

The driver side curtain shield squib circuit consists of the center airbag sensor and the driver side curtain shield airbag.

The circuit instructs the SRS to deploy when the deployment conditions are met.

These DTCs are recorded when a malfunction is detected in the driver side curtain shield squib circuit.

DTC Code Detection Condition Trouble Area
B1830/57

When all conditions below are met:


  • The center airbag sensor receives a line short circuit signal 5 times in the driver side curtain shield squib circuit during primary check.

  • Driver side curtain shield squib malfunction

  • Center airbag sensor malfunction

  • Floor wire

  • Curtain shield airbag assembly (driver side)

  • Center airbag sensor assembly
B1831/57

When all conditions below are met:


  • The center airbag sensor receives an open circuit signal in the driver side curtain shield squib circuit for 2 seconds.

  • Driver side curtain shield squib malfunction

  • Center airbag sensor malfunction

  • Floor wire

  • Curtain shield airbag assembly (driver side)

  • Center airbag sensor assembly
B1832/57

When all conditions below are met:


  • The center airbag sensor receives a short circuit to ground signal in the driver side curtain shield squib circuit for 0.5 seconds.

  • Driver side curtain shield squib malfunction

  • Center airbag sensor malfunction

  • Floor wire

  • Curtain shield airbag assembly (driver side)

  • Center airbag sensor assembly
B1833/57

When all conditions below are met:


  • The center airbag sensor receives a short circuit to B+ signal in the driver side curtain shield squib circuit for 0.5 seconds.

  • Driver side curtain shield squib malfunction

  • Center airbag sensor malfunction

  • Floor wire

  • Curtain shield airbag assembly (driver side)

  • Center airbag sensor assembly

WIRING DIAGRAM

A01DY61E19
A01DY61E20

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK VEHICLE CONDITION


    1. Check vehicle condition.

      Result
      Result Proceed to
      for LHD A
      for RHD B

    B

    CHECK CURTAIN SHIELD AIRBAG ASSEMBLY RH (CURTAIN SHIELD SQUIB RH) Click here

    A

  2. CHECK CURTAIN SHIELD AIRBAG LH (CURTAIN SHIELD SQUIB)

    A01E16TE01

    1. Turn the ignition switch OFF.

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

    3. Disconnect the connectors from the curtain shield airbag LH.

    4. Connect the white wire side of SST (resistance: 2.1 Ω) to connector C.

      CAUTION:

      Never connect the tester to the curtain shield airbag LH (curtain shield squib LH) for measurement, as this may lead to a serious injury due to airbag deployment.

      Note


      • Do not forcibly insert SST into the terminals of the connector when connecting SST.

      • Insert SST straight into the terminals of the connector.

      SST
      09843-18061

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

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

    7. Clear the DTCs Click here.

    8. Turn the ignition switch OFF.

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

    10. Check for DTCs Click here.

      OK
      DTC B1830, B1831, B1832 or B1833 is not output.

      Tech Tips

      Codes other than DTC B1830, B1831, B1832, B1833 may be output at this time, but they are not related to this check.


    NG

    CHECK CONNECTOR Click here

    OK

    REPLACE CURTAIN SHIELD AIRBAG ASSEMBLY LH

  3. CHECK CONNECTOR


    1. Turn the ignition switch OFF.

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

    3. Disconnect SST from connector C.

    4. Check that the floor wire connectors (on the curtain shield airbag LH side) are not damaged.

      OK
      The lock button is not disengaged, or the claw of the lock is not deformed or damaged.

    NG

    REPLACE FLOOR WIRE

    OK

  4. CHECK FLOOR WIRE (CURTAIN SHIELD SQUIB LH CIRCUIT)

    A01DVGYE01

    1. Disconnect the connectors from the center airbag sensor.

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

    3. Turn the ignition switch ON.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      C22-2 (ICL-) - Body ground Ignition switch ON Below 1 V
      C22-1 (ICL+) - Body ground

    5. Turn the ignition switch OFF.

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

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

      Standard resistance
      Tester Connection Condition Specified Condition
      C22-2 (ICL-) - C22-1 (ICL+) Always Below 1 Ω

    8. Release the activation prevention mechanism built into connector B Click here.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      C22-2 (ICL-) - C22-1 (ICL+) Always 1 MΩ or higher
      C22-2 (ICL-) - Body ground
      C22-1 (ICL+) - Body ground

    NG

    REPLACE FLOOR WIRE

    OK

  5. CHECK CENTER AIRBAG SENSOR ASSEMBLY

    A01E2I8E01

    1. Connect the connectors to the curtain shield airbag LH and the center airbag sensor.

    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 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.

      OK
      DTC B1830, B1831, B1832 or B1833 is not output

      Tech Tips

      Codes other than DTC B1830, B1831, B1832, B1833 may be output at this time, but they are not related to this check.


    NG

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY

    OK

    USE SIMULATION METHOD TO CHECK

  6. CHECK CURTAIN SHIELD AIRBAG ASSEMBLY RH (CURTAIN SHIELD SQUIB RH)

    A01E16TE02

    1. Turn the ignition switch OFF.

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

    3. Disconnect the connector from the curtain shield airbag RH.

    4. Connect the white wire side of SST (resistance: 2.1 Ω) to connector C.

      CAUTION:

      Never connect the tester to the curtain shield airbag RH (curtain shield squib RH) for measurement, as this may lead to a serious injury due to airbag deployment.

      Note


      • Do not forcibly insert SST into the terminals of the connector when connecting SST.

      • Insert SST straight into the terminals of the connector.

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

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

    7. Clear the DTCs Click here.

    8. Turn the ignition switch OFF.

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

    10. Check for DTCs Click here.

      OK
      DTC B1830, B1831, B1832 or B1833 is not output.

      Tech Tips

      Codes other than DTC B1830, B1831, B1832 or B1833 may be output at this time, but they are not related to this check.


    NG

    CHECK CONNECTOR Click here

    OK

    REPLACE CURTAIN SHIELD AIRBAG ASSEMBLY RH

  7. CHECK CONNECTOR


    1. Turn the ignition switch OFF.

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

    3. Disconnect SST from connector C.

    4. Check that the floor wire connector (on the curtain shield airbag RH side) is not damaged.

      OK
      The lock button is not disengaged, or the claw of the lock is not deformed or damaged.

    NG

    REPLACE FLOOR WIRE

    OK

  8. CHECK FLOOR WIRE (CURTAIN SHIELD SQUIB RH CIRCUIT)

    A01DVGYE02

    1. Disconnect the connectors from the center airbag sensor.

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

    3. Turn the ignition switch ON.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      C21-2 (ICR-) - Body ground Ignition switch ON Below 1 V
      C21-1 (ICR+) - Body ground

    5. Turn the ignition switch OFF.

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

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

      Standard resistance
      Tester Connection Condition Specified Condition
      C21-2 (ICR-) - C21-1 (ICR+) Always Below 1 Ω

    8. Release the activation prevention mechanism built into connector B Click here.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      C21-2 (ICR-) - C21-1 (ICR+) Always 1 MΩ or higher
      C21-2 (ICR-) - Body ground
      C21-1 (ICR+) - Body ground

    NG

    REPLACE FLOOR WIRE

    OK

  9. CHECK CENTER AIRBAG SENSOR ASSEMBLY

    A01E2I8E02

    1. Connect the connectors to the curtain shield airbag RH and the center airbag sensor.

    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 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.

      OK
      DTC B1830, B1831, B1832 or B1833 is not output

      Tech Tips

      Codes other than DTC B1830, B1831, B1832 or B1833 may be output at this time, but they are not related to this check.


    NG

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY

    OK

    USE SIMULATION METHOD TO CHECK