AIRBAG SYSTEM, Diagnostic DTC:B1615/14

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

SYSTEM DESCRIPTION

The front airbag sensor LH consists of a diagnostic circuit and frontal deceleration sensor, etc. If the center airbag sensor receives signals from the frontal deceleration sensor, it determines whether the SRS should be activated.

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

DTC Code DTC Detection Condition Trouble Area
B1615/14

One of the following conditions is met:


  • A front airbag sensor LH malfunction.

  • A center airbag sensor malfunction.

  • Front airbag sensor LH

  • Engine room main wire

  • Instrument panel wire

  • Center airbag sensor assembly

WIRING DIAGRAM

A01IQW0E04

INSPECTION PROCEDURE

Note


  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work Click here.

  • When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected Click here.

PROCEDURE


  1. CHECK CONNECTION OF CONNECTORS


    1. Turn the ignition 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 center airbag sensor and front airbag sensor LH.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  2. CHECK CONNECTORS


    1. A01IUPTE01
      Text in Illustration
      *1 Front Airbag Sensor LH
      *2 Center Airbag Sensor

      Disconnect the connectors from the center airbag sensor and front airbag sensor LH.

    2. Check that the connectors (on the center airbag sensor side and front airbag sensor LH side) are not damaged.

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE HARNESS AND CONNECTOR

    OK

  3. CHECK FRONT AIRBAG SENSOR LH CIRCUIT


    1. A01ISX5E02
      Text in Illustration
      *1 Front Airbag Sensor LH
      *2 Center Airbag Sensor
      *3

      Front view of wire harness connector

      (to Front Airbag Sensor LH)
      *4 Connector E
      *5

      Rear view of wire harness connector

      (to Center Airbag Sensor)
      *6 Connector B
      *7 Service Wire

      Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

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

      Standard Voltage
      Tester Connection Switch 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

    3. Turn the ignition switch off.

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

    5. 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 a service wire.

    6. 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

    7. Disconnect the service wire from connector B.

    8. 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
      A10-2 (+SL) - Body ground Always 1 MΩ or higher
      A10-1 (-SL) - Body ground Always 1 MΩ or higher

    NG

    CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - ENGINE ROOM MAIN WIRE) Click here

    OK

  4. CHECK FRONT AIRBAG SENSOR LH


    1. A01IR36E02
      Text in Illustration
      *1 Front Airbag Sensor RH
      *2 Center Airbag Sensor

      Connect the connectors to the center airbag sensor.

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

    3. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

    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.

      Result
      Result Proceed to
      DTC B1610 and B1615 are not output A
      DTC B1610 is output B
      DTC B1615 is output C

      Tech Tips

      Codes other than DTC B1610 and B1615 may be output at this time, but they are not related to this check.


    B

    REPLACE FRONT AIRBAG SENSOR LH Click here

    C

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  5. CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - ENGINE ROOM MAIN WIRE)


    1. A01IT9PE02
      Text in Illustration
      *1 Front Airbag Sensor LH
      *2 Engine Room Main Wire
      *3 Instrument Panel Wire
      *4 Center Airbag Sensor
      *5

      Front view of wire harness connector

      (to Engine Room Main Wire)
      *6 Connector C
      *7

      Rear view of wire harness connector

      (to Center Airbag Sensor)
      *8 Connector B
      *9 Service Wire

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

    2. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      AH5-1 (+SL) - Body ground Ignition switch ON Below 1 V
      AH5-2 (-SL) - Body ground Ignition switch ON Below 1 V

    4. Turn the ignition switch off.

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

    6. 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 a service wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      AH5-1 (+SL) - AH5-2 (-SL) Always Below 1 Ω

    8. Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      AH5-1 (+SL) - AH5-2 (-SL) Always 1 MΩ or higher
      AH5-1 (+SL) - Body ground Always 1 MΩ or higher
      AH5-2 (-SL) - Body ground Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

    REPLACE ENGINE ROOM MAIN WIRE