AIRBAG SYSTEM (for TMC, TMMR Made), Diagnostic DTC:B1835/58, B1836/58, B1837/58, B1838/58

DTC Code DTC Name
B1835/58 Short in Curtain Shield Squib LH Circuit
B1836/58 Open in Curtain Shield Squib LH Circuit
B1837/58 Short to GND in Curtain Shield Squib LH Circuit
B1838/58 Short to B+ in Curtain Shield Squib LH Circuit

DESCRIPTION

The curtain shield squib LH circuit consists of the airbag sensor assembly and curtain shield airbag assembly LH.

The airbag sensor 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 LH circuit.

DTC No. DTC Detection Condition Trouble Area
B1835/58

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

  • Curtain shield squib LH malfunction

  • Airbag sensor assembly malfunction

  • Floor wire

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

  • Airbag sensor assembly
B1836/58

  • The airbag sensor assembly receives an open circuit signal in the curtain shield squib LH circuit.

  • Curtain shield squib LH malfunction

  • Airbag sensor assembly malfunction
B1837/58

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

  • Curtain shield squib LH malfunction

  • Airbag sensor assembly malfunction
B1838/58

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

  • Curtain shield squib LH malfunction

  • Airbag sensor assembly malfunction

WIRING DIAGRAM

B000KRZE21

INSPECTION PROCEDURE

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 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 a city road or rough road Click here.

PROCEDURE


  1. CHECK CONNECTORS


    1. B000MM5E01
      Text in Illustration
      *1 Curtain Shield Airbag Assembly LH
      *2 Airbag Sensor Assembly
      *3 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 LH and airbag sensor 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 LH and airbag sensor 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 LH 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 floor wire with the activation prevention mechanism is not deformed or damaged.

      OK
      The short spring is not deformed or damaged.

    NG

    REPLACE FLOOR WIRE

    OK

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


    1. B000IVCE02
      Text in Illustration
      *1 Curtain Shield Airbag Assembly LH
      *2 Airbag Sensor Assembly
      *a

      Front view of wire harness connector

      (to Curtain Shield Airbag Assembly LH)

      Connect the connector to the airbag sensor assembly.

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

      CAUTION:

      Never connect the tester to the curtain shield airbag assembly 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 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 B1835/58, B1836/58, B1837/58 or B1838/58 is not output.

      Tech Tips

      Codes other than DTCs B1835/58, B1836/58, B1837/58 and B1838/58 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.


    NG

    CHECK FLOOR WIRE Click here

    OK

    REPLACE CURTAIN SHIELD AIRBAG ASSEMBLY LH Click here

  3. CHECK FLOOR WIRE


    1. B000KXDE03
      Text in Illustration
      *1 Curtain Shield Airbag Assembly LH
      *2 Airbag Sensor Assembly
      *3 Floor Wire
      *a

      Front view of wire harness connector

      (to Curtain Shield Airbag Assembly LH)

      Disconnect the floor wire from the airbag sensor 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
        N27-1 (ICL+) - Body ground Ignition switch ON Below 1 V
        N27-2 (ICL-) - 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
        N27-1 (ICL+) - N27-2 (ICL-) 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
        N27-1 (ICL+) - Body ground Always 1 MΩ or higher
        N27-2 (ICL-) - 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
        N27-1 (ICL+) - N27-2 (ICL-) Always 1 MΩ or higher

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


    NG

    REPLACE FLOOR WIRE

    OK

  4. CHECK DTC


    1. B000MKCE01
      Text in Illustration
      *1 Curtain Shield Airbag Assembly LH
      *2 Airbag Sensor Assembly

      Connect the connectors to the curtain shield airbag assembly LH and airbag sensor 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 B1835/58, B1836/58, B1837/58 or B1838/58 is not output.

      Tech Tips

      Codes other than DTCs B1835/58, B1836/58, B1837/58 and B1838/58 may be output at this time, but they are not related to this check.


    NG

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here