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

DTC Code DTC Name
B1830 Short in Curtain Shield Airbag (RH) Squib Circuit
B1831 Open in Curtain Shield Airbag (RH) Squib Circuit
B1832 Short in Curtain Shield Airbag (RH) Squib Circuit (to Ground)
B1833 Short in Curtain Shield Airbag (RH) Squib Circuit (to +B)

DESCRIPTION

The curtain shield squib RH circuit consists of the airbag ECU assembly and curtain shield airbag assembly RH.

The airbag ECU assembly uses this circuit to deploy the airbag when deployment conditions are met.

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

DTC No. DTC Detection Condition Trouble Area
B1830

  • The airbag ECU assembly receives a line short circuit signal in the curtain shield squib RH circuit during primary check.

  • Curtain shield squib RH malfunction

  • Airbag ECU assembly malfunction

  • No. 2 floor wire

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

  • Airbag ECU assembly
B1831

  • The airbag ECU assembly receives an open circuit signal in the curtain shield squib RH circuit.

  • Curtain shield squib RH malfunction

  • Airbag ECU assembly malfunction
B1832

  • The airbag ECU assembly receives a short circuit to ground signal in the curtain shield squib RH circuit.

  • Curtain shield squib RH malfunction

  • Airbag ECU assembly malfunction
B1833

  • The airbag ECU assembly receives a short circuit to B+ signal in the curtain shield squib RH circuit.

  • Curtain shield squib RH malfunction

  • Airbag ECU assembly malfunction

WIRING DIAGRAM

A004HCBE03
*a Curtain Shield Airbag Assembly RH (Curtain Shield Squib RH)
*b Airbag ECU Assembly

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 here.

Tech Tips


  • Perform the simulation method by selecting check mode (Signal Check) using the GTS 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 a city road or rough road Click here.

PROCEDURE


  1. CHECK CONNECTORS


    1. A004IITE01
      Text in Illustration
      *1 Curtain Shield Airbag Assembly RH
      *2 Airbag ECU Assembly
      *3 No. 2 Floor Wire

      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 curtain shield airbag assembly RH and airbag ECU assembly.

      OK
      The connectors are properly connected.

      Tech Tips

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

    4. Disconnect the connectors from the curtain shield airbag assembly RH and airbag ECU assembly.

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

      OK
      The terminals are not deformed or damaged.

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

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

    7. Check that the short spring for the No. 2 floor wire with the activation prevention mechanism is not deformed or damaged.

      OK
      The short spring is not deformed or damaged.

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

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


    1. A004K7SE03
      Text in Illustration
      *1 Curtain Shield Airbag Assembly RH
      *2 Airbag ECU Assembly
      *a

      Front view of wire harness connector

      (to Curtain Shield Airbag Assembly RH)

      Connect the connector to the airbag ECU assembly.

    2. Connect SST (resistance 2.1 Ω) to connector C.

      CAUTION:

      Never connect the tester to the curtain shield airbag assembly 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 it.

      • Insert SST straight into the terminals of the connector.

      SST
      09843-18061

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

    4. Clear the DTCs stored in 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 or B1833 is not output.

      Tech Tips

      Codes other than DTCs B1830, B1831, B1832 and B1833 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. Disconnect SST from connector C.


    OK

    REPLACE CURTAIN SHIELD AIRBAG ASSEMBLY RH Click here

    NG

  3. CHECK NO. 2 FLOOR WIRE


    1. A004KWGE02
      Text in Illustration
      *1 Curtain Shield Airbag Assembly RH
      *2 Airbag ECU Assembly
      *3 No. 2 Floor Wire
      *a

      Front view of wire harness connector

      (to Curtain Shield Airbag Assembly RH)

      Disconnect the No. 2 floor wire from the airbag ECU assembly.

    2. Check for a short to B+ in the circuit.


      1. 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
        G11-1 (ICR+) - Body ground Ignition switch ON Below 1 V
        G11-2 (ICR-) - Body ground Ignition switch ON Below 1 V

      4. Turn the ignition switch off.

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

        CAUTION:

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

    3. Check for an open in the circuit.


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        G11-1 (ICR+) - G11-2 (ICR-) Always Below 1 Ω

    4. Check for a short to ground in the circuit.


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        G11-1 (ICR+) - Body ground Always 1 MΩ or higher
        G11-2 (ICR-) - Body ground Always 1 MΩ or higher

    5. Check for a short in the circuit.


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

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        G11-1 (ICR+) - G11-2 (ICR-) Always 1 MΩ or higher

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


    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  4. CHECK DTC


    1. A004K7JE02
      Text in Illustration
      *1 Curtain Shield Airbag Assembly RH
      *2 Airbag ECU Assembly

      Connect the connectors to the curtain shield airbag assembly RH and airbag ECU assembly.

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

    3. Clear the DTCs stored in memory Click here.

    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.

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

      Tech Tips

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


    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE AIRBAG ECU ASSEMBLY Click here