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 assembly and the curtain shield airbag assembly (driver side).

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

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

DTC No. DTC Detection Condition Trouble Area
B1830/57

When one of following conditions is met:


  • The center airbag sensor assembly 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 assembly malfunction

  • Floor wire

  • Curtain shield airbag assembly (Driver side curtain shield squib)

  • Center airbag sensor assembly
B1831/57

When one of following conditions is met:


  • The center airbag sensor assembly 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 assembly malfunction

  • Floor wire

  • Curtain shield airbag assembly (Driver side curtain shield squib)

  • Center airbag sensor assembly
B1832/57

When one of following conditions is met:


  • The center airbag sensor assembly 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 assembly malfunction

  • Floor wire

  • Curtain shield airbag assembly (Driver side curtain shield squib)

  • Center airbag sensor assembly
B1833/57

When one of following conditions is met:


  • The center airbag sensor assembly 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 assembly malfunction

  • Floor wire

  • Curtain shield airbag assembly (Driver side curtain shield squib)

  • Center airbag sensor assembly

WIRING DIAGRAM

A01195ZE03

INSPECTION PROCEDURE

Tech Tips


  • Perform the simulation method by selecting Check Mode (signal check) with the intelligent tester Click here.

  • After selecting Check Mode (signal check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on various types of roads Click here.

PROCEDURE


  1. CHECK CONNECTOR


    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 connector is properly connected to the curtain shield airbag assembly (driver side).

      OK
      The connector is properly connected.

      Tech Tips

      If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

    4. Disconnect the connector from the curtain shield airbag assembly (driver side).

    5. Check that the floor wire connector (on the curtain shield airbag assembly (driver side) side) is not damaged.

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

    NG

    REPLACE FLOOR WIRE

    OK

  2. CHECK CURTAIN SHIELD AIRBAG ASSEMBLY (DRIVER SIDE CURTAIN SHIELD SQUIB)

    A011B9AE01
    Text in Illustration
    *1 for LHD
    *2 for RHD
    *3 Driver Side Curtain Shield Squib
    *4 Center Airbag Sensor Assembly
    *5

    Front view of wire harness connector

    (to Driver Side Curtain Shield Squib)
    *6 Connector C
    SST
    09843-18061

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

      CAUTION:

      Never connect the tester to the curtain shield airbag assembly (driver side curtain shield squib) 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.

    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 B1830, B1831, B1832, B1833 or 57 is not output.

      Tech Tips

      DTCs other than B1830, B1831, B1832, B1833 and 57 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 (DRIVER SIDE) Click here

  3. CHECK CONNECTOR


    1. Turn the ignition switch off.

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

    3. Disconnect SST from connector C.

    4. Check that the connector is properly connected to the center airbag sensor assembly.

      OK
      The connector is properly connected.

      Tech Tips

      If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

    5. Disconnect the connector from the center airbag sensor assembly.

    6. Check that the terminal of the connector is not damaged.

      OK
      The terminal is not deformed or damaged.

    7. Check that the short spring for the floor wire connector with the activation prevention mechanism is not deformed or damaged.

      OK
      The short spring is not deformed or damaged.

    NG

    REPLACE FLOOR WIRE

    OK

  4. CHECK FLOOR WIRE (CURTAIN SHIELD SQUIB - CENTER AIRBAG SENSOR ASSEMBLY)

    A0116XRE01
    Text in Illustration
    *1 for LHD
    *2 for RHD
    *3 Driver Side Curtain Shield Squib
    *4 Center Airbag Sensor Assembly
    *5 Floor Wire
    *6

    Front view of wire harness connector

    (to Driver Side Curtain Shield Squib)
    *7 Connector C

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

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      G24-1 (ICL-) - Body ground Ignition switch ON Below 1 V
      G24-2 (ICL+) - Body ground Ignition switch ON Below 1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      G23-1 (ICR-) - Body ground Ignition switch ON Below 1 V
      G23-2 (ICR+) - 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. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      G24-1 (ICL-) - G24-2 (ICL+) Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      G23-1 (ICR-) - G23-2 (ICR+) Always Below 1 Ω

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

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      G24-1 (ICL-) - G24-2 (ICL+) Always 1 MΩ or higher
      G24-1 (ICL-) - Body ground Always 1 MΩ or higher
      G24-2 (ICL+) - Body ground Always 1 MΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      G23-1 (ICR-) - G23-2 (ICR+) Always 1 MΩ or higher
      G23-1 (ICR-) - Body ground Always 1 MΩ or higher
      G23-2 (ICR+) - Body ground Always 1 MΩ or higher

    NG

    REPLACE FLOOR WIRE

    OK

  5. CHECK CENTER AIRBAG SENSOR ASSEMBLY

    A0117HME03
    Text in Illustration
    *1 Driver Side Curtain Shield Squib
    *2 Center Airbag Sensor Assembly

    1. Restore the released activation prevention mechanism of connector B to the original condition.

    2. Connect the connectors to the curtain shield airbag assembly (driver side) and the center airbag sensor assembly.

    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.

      OK
      DTC B1830, B1831, B1832, B1833 or 57 is not output.

      Tech Tips

      DTCs other than B1830, B1831, B1832, B1833 and 57 may be output at this time, but they are not related to this check.


    NG

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here