AIRBAG SYSTEM, Diagnostic DTC:B1615/14

DTC Code DTC Name
B1615/14 Front Airbag Sensor LH Malfunction

DESCRIPTION

The front airbag sensor LH circuit consists of the airbag sensor assembly and front airbag sensor LH.

The front airbag sensor LH detects impacts to the vehicle and sends signals to the airbag sensor assembly to determine if the airbags and pretensioners should be deployed.

DTC B1615/14 is stored when a malfunction is detected in the front airbag sensor LH circuit.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Test Mode / Check Mode

B1615/14

Front Airbag Sensor LH Malfunction

  • The airbag sensor assembly detects a line short, short to ground or B+, or an open in the front airbag sensor LH circuit.

  • Front airbag sensor LH malfunction

  • Airbag sensor assembly malfunction

  • Instrument panel wire

  • Engine room main wire

  • Front airbag sensor LH

  • Airbag sensor assembly

Does not apply to test/check mode

WIRING DIAGRAM

C238364E20

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.

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PROCEDURE

  1. CHECK CONNECTORS

    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. Check that the connectors are properly connected to the airbag sensor assembly and front airbag sensor LH. Also check that the connectors that link the engine room main wire and instrument panel wire are properly connected.

      OK

      The connectors are properly connected.

      Tip:

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

    4. Disconnect the connectors from the airbag sensor assembly and front airbag sensor LH. Also disconnect the connectors that link the engine room main wire and instrument panel wire.

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

      OK

      The terminals are not deformed or damaged.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE WIRE HARNESS

    OK

  2. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (OPEN)

    1. C238216C02

      *1

      Front Airbag Sensor LH

      *2

      Airbag Sensor Assembly

      *3

      Service Wire

      *a

      Front view of wire harness connector

      (to Airbag Sensor Assembly)

      *b

      Front view of wire harness connector

      (to Front Airbag Sensor LH)

      Connect the connectors that link the engine room main wire and instrument panel wire.

    2. Using a service wire, connect terminals 30 (+SL) and 28 (-SL) of connector B.

      Note:

      Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A10-2 (+SL) - A10-1 (-SL)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    CHECK INSTRUMENT PANEL WIRE (OPEN)Click here

    OK

  3. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (SHORT)

    1. C238212C15

      *1

      Front Airbag Sensor LH

      *2

      Airbag Sensor Assembly

      *a

      Front view of wire harness connector

      (to Front Airbag Sensor LH)

      Disconnect the service wire from connector B.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A10-2 (+SL) - A10-1 (-SL)

      Always

      1 MΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    CHECK INSTRUMENT PANEL WIRE (SHORT)Click here

    OK

  4. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (SHORT TO B+)

    1. C238212C15

      *1

      Front Airbag Sensor LH

      *2

      Airbag Sensor Assembly

      *a

      Front view of wire harness connector

      (to Front Airbag Sensor LH)

      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

      A10-2 (+SL) - Body ground

      Ignition switch ON

      Below 1 V

      A10-1 (-SL) - 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.

    Result

    Proceed to

    OK

    NG
    NG

    CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)Click here

    OK

  5. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (SHORT TO GROUND)

    1. C238212C15

      *1

      Front Airbag Sensor LH

      *2

      Airbag Sensor Assembly

      *a

      Front view of wire harness connector

      (to Front Airbag Sensor LH)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A10-2 (+SL) - Body ground

      Always

      1 MΩ or higher

      A10-1 (-SL) - Body ground

      Always

      1 MΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)Click here

    OK

  6. CHECK FRONT AIRBAG SENSOR LH

    1. C238211C02

      *1

      Front Airbag Sensor RH

      *2

      Airbag Sensor Assembly

      Connect the connector to the airbag sensor assembly.

    2. Interchange the front airbag sensor LH with RH and connect the connectors.

    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 ignition switch off.

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

    7. Check for DTCs.

      Click here

      Body Electrical > SRS Airbag > Trouble Codes

      Tip:

      Codes other than DTCs B1610/13 and B1615/14 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. Return the front airbag sensor LH and RH to their original positions and connect the connectors.

    Result

    Result

    Proceed to

    DTCs B1610/13 and B1615/14 are not output.

    A

    DTC B1615/14 is output.

    B

    DTC B1610/13 is output.

    C
    A

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick hereClick hereClick hereClick hereClick here

    B

    REPLACE AIRBAG SENSOR ASSEMBLY

    Click hereClick here

    C

    REPLACE FRONT AIRBAG SENSOR LH

    Click hereClick hereClick hereClick here

  7. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

    1. C166235C04

      *1

      Front Airbag Sensor LH

      *2

      Airbag Sensor Assembly

      *3

      Engine Room Main Wire

      *4

      Instrument Panel Wire

      *a

      Front view of wire harness connector

      (to Engine Room Main Wire)

      Disconnect the instrument panel wire connector from the engine room main wire.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      AE4-1 (+SL) - Body ground

      Always

      1 MΩ or higher

      AE4-2 (-SL) - Body ground

      Always

      1 MΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE ENGINE ROOM MAIN WIRE

    NG

    REPLACE INSTRUMENT PANEL WIRE

  8. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)

    1. C166235C04

      *1

      Front Airbag Sensor LH

      *2

      Airbag Sensor Assembly

      *3

      Engine Room Main Wire

      *4

      Instrument Panel Wire

      *a

      Front view of wire harness connector

      (to Engine Room Main Wire)

      Disconnect the instrument panel wire connector from the engine room main wire.

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

    3. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      AE4-1 (+SL) - Body ground

      Ignition switch ON

      Below 1 V

      AE4-2 (-SL) - Body ground

      Ignition switch ON

      Below 1 V

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE ENGINE ROOM MAIN WIRE

    NG

    REPLACE INSTRUMENT PANEL WIRE

  9. CHECK INSTRUMENT PANEL WIRE (SHORT)

    1. C166235C04

      *1

      Front Airbag Sensor LH

      *2

      Airbag Sensor Assembly

      *3

      Engine Room Main Wire

      *4

      Instrument Panel Wire

      *a

      Front view of wire harness connector

      (to Engine Room Main Wire)

      Disconnect the instrument panel wire connector from the engine room main wire.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      AE4-1 (+SL) - AE4-2 (-SL)

      Always

      1 MΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE ENGINE ROOM MAIN WIRE

    NG

    REPLACE INSTRUMENT PANEL WIRE

  10. CHECK INSTRUMENT PANEL WIRE (OPEN)

    1. C265159C01

      *1

      Front Airbag Sensor LH

      *2

      Airbag Sensor Assembly

      *3

      Engine Room Main Wire

      *4

      Instrument Panel Wire

      *5

      Service Wire

      *a

      Front view of wire harness connector

      (to Airbag Sensor Assembly)

      *b

      Front view of wire harness connector

      (to Engine Room Main Wire)

      Disconnect the instrument panel wire connector from the engine room main wire.

      Tip:

      The service wire has already been inserted into connector B.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      AE4-1 (+SL) - AE4-2 (-SL)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE ENGINE ROOM MAIN WIRE

    NG

    REPLACE INSTRUMENT PANEL WIRE