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

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

DESCRIPTION

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

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

These DTCs are stored when a malfunction is detected in the curtain shield squib RH circuit.

DTC Code

DTC Detection Condition

Trouble Area

B1830/57

One of the following conditions is met:

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

  • A curtain shield squib RH malfunction.

  • A center airbag sensor malfunction.

  • No. 2 floor wire

  • Curtain shield airbag assembly RH (Curtain shield squib RH)

  • Center airbag sensor assembly

B1831/57

One of the following conditions is met:

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

  • A curtain shield squib RH malfunction.

  • A center airbag sensor malfunction.

  • No. 2 floor wire

  • Curtain shield airbag assembly RH (Curtain shield squib RH)

  • Center airbag sensor assembly

B1832/57

One of the following conditions is met:

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

  • A curtain shield squib RH malfunction.

  • A center airbag sensor malfunction.

  • No. 2 floor wire

  • Curtain shield airbag assembly RH (Curtain shield squib RH)

  • Center airbag sensor assembly

B1833/57

One of the following conditions is met:

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

  • A curtain shield squib RH malfunction.

  • A center airbag sensor malfunction.

  • No. 2 floor wire

  • Curtain shield airbag assembly RH (Curtain shield squib RH)

  • Center airbag sensor assembly

WIRING DIAGRAM

C178002E36

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).

Tip:

To perform the simulation method, enter check mode (signal check) with the intelligent tester (Click here), and then wiggle each connector of the airbag system or drive the vehicle on various types of roads (Click here).

PROCEDURE

  1. CHECK CURTAIN SHIELD AIRBAG RH (CURTAIN SHIELD SQUIB RH)

    1. U122820E02

      Turn the ignition switch off.

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

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

    10. Check for DTCs (Click here).

      OK

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

      Tip:

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

      Table 1. Text in Illustration

      *1

      Curtain Shield Squib RH

      *2

      Center Airbag Sensor

      *3

      Front view of wire harness connector

      (to Curtain Shield Squib RH)

      *4

      Connector C

    09843-18061

    REPLACE CURTAIN SHIELD AIRBAG ASSEMBLY RH

    (Click here)

  2. 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 No. 2 floor wire connector (on the curtain shield airbag RH side) is not damaged.

      OK

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

    REPLACE NO. 2 FLOOR WIRE

  3. CHECK NO. 2 FLOOR WIRE (CURTAIN SHIELD SQUIB RH CIRCUIT)

    1. U122821E02

      Disconnect the connectors from the center airbag sensor.

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

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      O8-1 (ICR+) - Body ground

      Ignition switch ON

      Below 1 V

      O8-2 (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

      Tester Connection

      Condition

      Specified Condition

      O8-1 (ICR+) - O8-2 (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

      Tester Connection

      Condition

      Specified Condition

      O8-1 (ICR+) - O8-2 (ICR-)

      Always

      1 MΩ or higher

      O8-1 (ICR+) - Body ground

      Always

      1 MΩ or higher

      O8-2 (ICR-) - Body ground

      Always

      1 MΩ or higher
    Table 2. Text in Illustration

    *1

    Curtain Shield Squib RH

    *2

    No. 2 Floor Wire

    *3

    Center Airbag Sensor

    *4

    Front view of wire harness connector

    (to Curtain Shield Squib RH)

    *5

    Connector C

    REPLACE NO. 2 FLOOR WIRE

  4. CHECK CENTER AIRBAG SENSOR

    1. C198556E02

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

    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 (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 or B1833 is not output.

      Tip:

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

      Table 3. Text in Illustration

      *1

      Curtain Shield Squib RH

      *2

      Center Airbag Sensor

    USE SIMULATION METHOD TO CHECK

    (Click here)

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY

    (Click here)