AIRBAG SYSTEM, Diagnostic DTC:B1830/57, B1831/57, B1832/57, 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 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. Detection Item DTC Detection Condition Trouble Area Test Mode / Check Mode
B1830/57 Short in Curtain Shield Squib RH Circuit

    Any of the following conditions is met:

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

  • Curtain shield squib RH malfunction

  • Airbag ECU assembly malfunction

  • Floor wire

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

  • Airbag ECU assembly

 Applies to check mode
B1831/57 Open in Curtain Shield Squib RH Circuit

    Any of the following conditions is met:

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

  • Curtain shield squib RH malfunction

  • Airbag ECU assembly malfunction

  • Floor wire

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

  • Airbag ECU assembly

 Applies to check mode
B1832/57 Short to GND in Curtain Shield Squib RH Circuit

    Any of the following conditions is met:

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

  • Curtain shield squib RH malfunction

  • Airbag ECU assembly malfunction

  • Floor wire

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

  • Airbag ECU assembly

 Applies to check mode
B1833/57 Short to B+ in Curtain Shield Squib RH Circuit

    Any of the following conditions is met:

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

  • Curtain shield squib RH malfunction

  • Airbag ECU assembly malfunction

  • Floor wire

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

  • Airbag ECU assembly

 Applies to check mode
DTC Detection Conditions: B1830/57
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnosis Condition - - - -
Malfunction Status The airbag ECU assembly detects a line short in the curtain shield squib RH circuit during primary check ○ - -
Curtain shield squib RH malfunction - ○ -
Airbag ECU assembly malfunction - - ○
Detection Time - - -
Number of Trips 1 trip 1 trip 1 trip

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: B1831/57
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnosis Condition - - - -
Malfunction Status The airbag ECU assembly detects an open in the curtain shield squib RH circuit ○ - -
Curtain shield squib RH malfunction - ○ -
Airbag ECU assembly malfunction - - ○
Detection Time - - -
Number of Trips 1 trip 1 trip 1 trip

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: B1832/57
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnosis Condition - - - -
Malfunction Status The airbag ECU assembly detects a short to ground in the curtain shield squib RH circuit ○ - -
Curtain shield squib RH malfunction - ○ -
Airbag ECU assembly malfunction - - ○
Detection Time - - -
Number of Trips 1 trip 1 trip 1 trip

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: B1833/57
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnosis Condition - - - -
Malfunction Status The airbag ECU assembly detects a short to B+ in the curtain shield squib RH circuit ○ - -
Curtain shield squib RH malfunction - ○ -
Airbag ECU assembly malfunction - - ○
Detection Time - - -
Number of Trips 1 trip 1 trip 1 trip

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

B002EM4E14
*a Curtain Shield Squib RH (Curtain Shield Airbag Assembly RH)
*b Airbag ECU Assembly

CAUTION / NOTICE / HINT

Note

After turning the engine 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. B002CE4C07
      *1 Curtain Shield Airbag Assembly RH
      *2 Airbag ECU Assembly
      *3 Floor Wire

      Turn the engine 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 curtain shield airbag assembly RH and airbag ECU assembly.

      OK
      The connectors are properly connected.

      Tech Tips

      If the connectors are not properly connected, 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 floor wire connector (on the curtain shield airbag assembly RH side) is not damaged.

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

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

      OK
      The short spring is not deformed or damaged.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FLOOR WIRE

    OK

  2. CHECK CURTAIN SHIELD AIRBAG ASSEMBLY RH


    1. B002ECXC15
      *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 a tester to the curtain shield airbag assembly RH for measurement, as this may lead to a serious injury due to airbag deployment.

      B002CZK

      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


      Body Electrical > SRS Airbag > Clear DTCs

    5. Turn the engine switch off.

    6. Turn the engine switch on (IG), and wait for at least 60 seconds.

    7. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      OK
      DTC B1830/57, B1831/57, B1832/57 or B1833/57 is not output.

      Tech Tips

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

    8. Turn the engine switch off.

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

    10. Disconnect SST from connector C.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CURTAIN SHIELD AIRBAG ASSEMBLY RH Click here

    NG

  3. CHECK FLOOR WIRE


    1. B002DMAC24
      *1 Curtain Shield Airbag Assembly RH
      *2 Airbag ECU Assembly
      *3 Floor Wire
      *a

      Front view of wire harness connector

      (to Curtain Shield Airbag Assembly RH)

      Disconnect the 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 engine switch on (IG).

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

        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        T19-1 (ICR+) - Body ground Engine switch on (IG) Below 1 V
        T19-2 (ICR-) - Body ground Engine switch on (IG) Below 1 V

      4. Turn the engine switch off.

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

    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
        T19-1 (ICR+) - T19-2 (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
        T19-1 (ICR+) - Body ground Always 1 MΩ or higher
        T19-2 (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
        T19-1 (ICR+) - T19-2 (ICR-) Always 1 MΩ or higher

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

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FLOOR WIRE

    OK

  4. CHECK DTC


    1. B002EH2C21
      *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


      Body Electrical > SRS Airbag > Clear DTCs

    4. Turn the engine switch off.

    5. Turn the engine switch on (IG), and wait for at least 60 seconds.

    6. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      OK
      DTC B1830/57, B1831/57, B1832/57 or B1833/57 is not output.

      Tech Tips

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

      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE AIRBAG ECU ASSEMBLY Click here