AIRBAG SYSTEM, 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 center airbag sensor assembly and curtain shield airbag assembly LH.

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

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

DTC No. DTC Detection Condition Trouble Area
B1835/58
  • The center airbag sensor assembly receives a line short circuit signal in the curtain shield squib LH circuit during primary check.

  • Curtain shield squib LH malfunction

  • Center airbag sensor assembly malfunction


  • No. 2 floor wire

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

  • Center airbag sensor assembly

B1836/58
  • The center airbag sensor assembly receives an open circuit signal in the curtain shield squib LH circuit.

  • Curtain shield squib LH malfunction

  • Center airbag sensor assembly malfunction


  • No. 2 floor wire

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

  • Center airbag sensor assembly

B1837/58
  • The center airbag sensor assembly receives a short circuit to ground signal in the curtain shield squib LH circuit.

  • Curtain shield squib LH malfunction

  • Center airbag sensor assembly malfunction


  • No. 2 floor wire

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

  • Center airbag sensor assembly

B1838/58
  • The center airbag sensor assembly receives a short circuit to B+ signal in the curtain shield squib LH circuit.

  • Curtain shield squib LH malfunction

  • Center airbag sensor assembly malfunction


  • No. 2 floor wire

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

  • Center airbag sensor assembly

WIRING DIAGRAM

A01NCZ5E05

INSPECTION PROCEDURE

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 or rough road Click here.

PROCEDURE


  1. CHECK CONNECTORS


    1. A01NH4SE01
      Text in Illustration
      *1 Curtain Shield Squib LH
      *2 Center Airbag Sensor Assembly
      *3 No. 2 Floor Wire

      Turn the power switch off.

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

      Note

      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 center 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 center 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 No. 2 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 No. 2 floor wire with the activation prevention mechanism is not deformed or damaged.

      OK
      The short spring is not deformed or damaged.

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


    1. A01NGKJE01
      Text in Illustration
      *1 Curtain Shield Squib LH
      *2 Center Airbag Sensor Assembly
      *3

      Front view of wire harness connector

      (to Curtain Shield Airbag Assembly LH)

      *4 Connector C

      Connect the connector to the center 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.

      • Insert SST straight into the terminals of the connector.

      SST
      09843-18061
    3. Connect the cable to the negative (-) battery terminal.

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

    5. Clear the DTCs stored in the memory Click here.

    6. Turn the power switch off.

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

    8. Check for DTCs Click here.

      OK
      DTC B1835, B1836, B1837, B1838 or 58 is not output.

      Tech Tips

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


    NG
    OK
  3. CHECK NO. 2 FLOOR WIRE (CURTAIN SHIELD SQUIB LH CIRCUIT)


    1. A01NHVKE01
      Text in Illustration
      *1 Curtain Shield Squib LH
      *2 Center Airbag Sensor Assembly
      *3 No. 2 Floor Wire
      *4

      Front view of wire harness connector

      (to Curtain Shield Airbag Assembly LH)

      *5 Connector C

      Turn the power switch off.

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

      Note

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

    3. Disconnect SST from connector C.

    4. Disconnect the No. 2 floor wire from the center airbag sensor assembly.

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


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

      2. Turn the power switch on (IG).

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

        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        P32-1 (ICL+) - Body ground Power switch on (IG) Below 1 V
        P32-2 (ICL-) - Body ground Power switch on (IG) Below 1 V
    6. Check for an open in the circuit.


      1. Turn the power switch off.

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

        Note

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

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        P32-1 (ICL+) - P32-2 (ICL-) Always Below 1 Ω
    7. 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
        P32-1 (ICL+) - Body ground Always 1 MΩ or higher
        P32-2 (ICL-) - Body ground Always 1 MΩ or higher
    8. 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
        P32-1 (ICL+) - P32-2 (ICL-) Always 1 MΩ or higher

    NG
    OK
  4. CHECK CENTER AIRBAG SENSOR ASSEMBLY


    1. A01NFEHE01
      Text in Illustration
      *1 Curtain Shield Squib LH
      *2 Center Airbag Sensor Assembly

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

    2. Connect the connectors to the curtain shield airbag assembly LH and center airbag sensor assembly.

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

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

    5. Clear the DTCs stored in the memory Click here.

    6. Turn the power switch off.

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

    8. Check for DTCs Click here.

      OK
      DTC B1835, B1836, B1837, B1838 or 58 is not output.

      Tech Tips

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


    NG
    OK