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AIRBAG SYSTEM(w/o Curtain Shield Airbag), Diagnostic DTC:B1800/51, B1801/51, B1802/51, B1803/51

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DTC Code DTC Name
B1800/51 Short in Driver Side Squib Circuit
B1801/51 Open in Driver Side Squib Circuit
B1802/51 Short to GND in Driver Side Squib Circuit
B1803/51 Short to B+ in Driver Side Squib Circuit
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DESCRIPTION


DTC No. DTC Detection Condition Trouble Area
B1800/51

  • The airbag sensor assembly receives a line short circuit signal in the driver side squib circuit during primary check.

  • Driver side squib malfunction

  • Spiral cable sub-assembly malfunction

  • Airbag sensor assembly malfunction

  • Instrument panel wire

  • Spiral cable sub-assembly

  • Steering pad (Driver side squib)

  • Airbag sensor assembly
B1801/51

  • The airbag sensor assembly receives an open circuit signal in the driver side squib circuit.

  • Driver side squib malfunction

  • Spiral cable sub-assembly malfunction

  • Airbag sensor assembly malfunction
B1802/51

  • The airbag sensor assembly receives a short circuit to ground signal in the driver side squib circuit.

  • Driver side squib malfunction

  • Spiral cable sub-assembly malfunction

  • Airbag sensor assembly malfunction
B1803/51

  • The airbag sensor assembly receives a short circuit to B+ signal in the driver side squib circuit.

  • Driver side squib malfunction

  • Spiral cable sub-assembly malfunction

  • Airbag sensor assembly malfunction
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Tip:

  • 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).

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PROCEDURE


  1. Click here

    CHECK CONNECTORS


    1. A01VDLHE02

      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 steering pad, spiral cable sub-assembly and airbag sensor assembly.

      OK
      The connectors are properly connected.
      Tip:

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

    4. Disconnect the connectors from the steering pad, spiral cable sub-assembly 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 spiral cable sub-assembly connector (on the steering pad side) is not damaged.

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

    7. Check that the short springs for the instrument panel wire and spiral cable sub-assembly with the activation prevention mechanism are not deformed or damaged.

      OK
      The short springs are not deformed or damaged.
      Table 1. Text in Illustration
      *A w/ VSC
      *B w/o VSC
      *1 Steering Pad (Driver Side Squib)
      *2 Spiral Cable Sub-assembly
      *3 Airbag Sensor Assembly
      *4 Instrument Panel Wire

  2. Click here

    CHECK STEERING PAD (DRIVER SIDE SQUIB)

    09843-18061

    1. A01VF9DE02

      Connect the instrument panel wire to the airbag sensor assembly and spiral cable sub-assembly.

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

      CAUTION:

      Never connect the tester to the steering pad (driver side squib) 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.

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

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

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

    6. Turn the ignition switch off.

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

    8. Check for DTCs (Click here).

      OK
      DTC B1800/51, B1801/51, B1802/51 or B1803/51 is not output.
      Table 2. Text in Illustration
      *A w/ VSC
      *B w/o VSC
      *1 Steering Pad (Driver Side Squib)
      *2 Spiral Cable Sub-assembly
      *3 Airbag Sensor Assembly
      *4 Connector E
      *a

      Front view of wire harness connector

      (to Steering Pad (Driver Side Squib))
      Tip:

      Codes other than DTCs B1800/51, B1801/51, B1802/51 and B1803/51 may be output at this time, but they are not related to this check.


  3. Click here

    CHECK DRIVER SIDE SQUIB CIRCUIT


    1. 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. A01VG3ME02

      Disconnect SST from connector E.

    4. Disconnect the instrument panel wire from the 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 ignition switch to ON.

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

        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        z1-2 (D+) - Body ground Ignition switch ON Below 1 V
        z1-1 (D-) - Body ground Ignition switch ON Below 1 V

    6. Check for an open in the circuit.


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        z1-2 (D+) - z1-1 (D-) 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
        z1-2 (D+) - Body ground Always 1 MΩ or higher
        z1-1 (D-) - 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
        z1-2 (D+) - z1-1 (D-) Always 1 MΩ or higher
        Table 3. Text in Illustration
        *A w/ VSC
        *B w/o VSC
        *1 Steering Pad (Driver Side Squib)
        *2 Spiral Cable Sub-assembly
        *3 Airbag Sensor Assembly
        *4 Connector E
        *a

        Front view of wire harness connector

        (to Steering Pad (Driver Side Squib))

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


  4. Click here

    CHECK DTC


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

    2. Connect the connectors to the steering pad and airbag sensor assembly.

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

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

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

    6. Turn the ignition switch off.

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

    8. Check for DTCs (Click here).

      OK
      DTC B1800/51, B1801/51, B1802/51 or B1803/51 is not output.
      Tip:

      Codes other than DTCsB1800/51, B1801/51, B1802/51 and B1803/51 may be output at this time, but they are not related to this check.


  5. Click here

    CHECK INSTRUMENT PANEL WIRE


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

    2. A01VIPAE02

      Disconnect the instrument panel wire from the spiral cable sub-assembly.

    3. 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 Switch Condition Specified Condition
        F17-1 (D+) - Body ground Ignition switch ON Below 1 V
        F17-2 (D-) - Body ground Ignition switch ON Below 1 V

    4. Check for an open in the circuit.


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        F17-1 (D+) - F17-2 (D-) Always Below 1 Ω

    5. 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
        F17-1 (D+) - Body ground Always 1 MΩ or higher
        F17-2 (D-) - Body ground Always 1 MΩ or higher

    6. 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
        F17-1 (D+) - F17-2 (D-) Always 1 MΩ or higher

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

      Table 4. Text in Illustration
      *A w/ VSC
      *B w/o VSC
      *1 Steering Pad (Driver Side Squib)
      *2 Spiral Cable Sub-assembly
      *3 Airbag Sensor Assembly
      *4 Instrument Panel Wire
      *5 Connector C
      *a

      Front view of wire harness connector

      (to Spiral Cable Sub-assembly)

  6. Click here

    CHECK SPIRAL CABLE SUB-ASSEMBLY


    1. A01VJ1GE02

      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 Switch Condition Specified Condition
        z1-2 (D+) - Body ground Ignition switch ON Below 1 V
        z1-1 (D-) - Body ground Ignition switch ON Below 1 V

    2. Check for an open in the circuit.


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        z1-2 (D+) - z1-1 (D-) Always Below 1 Ω

    3. 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
        z1-2 (D+) - Body ground Always 1 MΩ or higher
        z1-1 (D-) - Body ground Always 1 MΩ or higher

    4. Check for a short in the circuit.


      1. Release the activation prevention mechanism built into connector D (Click here).

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        z1-2 (D+) - z1-1 (D-) Always 1 MΩ or higher

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

      Table 5. Text in Illustration
      *A w/ VSC
      *B w/o VSC
      *1 Steering Pad (Driver Side Squib)
      *2 Spiral Cable Sub-assembly
      *3 Airbag Sensor Assembly
      *4 Instrument Panel Wire
      *5 Connector E
      *a

      Front view of wire harness connector

      (to Steering Pad (Driver Side Squib))