AIRBAG SYSTEM, Diagnostic DTC:B1615/14

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

DESCRIPTION

The front airbag sensor LH consists of the diagnostic circuit, the frontal deceleration sensor, etc.

If the center airbag sensor assembly receives signals from the frontal deceleration sensor, it determines whether or not the SRS should be activated.

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

DTC No. DTC Detecting Condition Trouble Area
B1615/14

  • The center airbag sensor assembly receives a line short circuit, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the front airbag sensor LH circuit for 2 seconds.

  • Front airbag sensor LH malfunction

  • Center airbag sensor assembly malfunction

  • Engine room main wire

  • Wiring cowl to headlight harness assembly

  • Front airbag sensor LH

  • Center airbag sensor assembly

WIRING DIAGRAM

A01BD41E10

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK DTC


    1. A01BH9UE01

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

    2. Clear the DTCs stored in memory Click here.

    3. Turn the ignition switch to the LOCK position.

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

    5. Check the DTCs Click here.

      OK
      DTC B1615/14 is not output.

      Tech Tips

      Codes other than DTC B1615/14 may be output at this time, but they are not related to this check.


    OK

    USE SIMULATION METHOD TO CHECK

    NG

  2. CHECK CONNECTION OF CONNECTORS


    1. Turn the ignition switch to the LOCK position.

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

    3. Check that the connector is properly connected to the center airbag sensor assembly and the front airbag sensor LH.

      OK
      The connectors are connected.

    NG

    CONNECT CONNECTORS, THEN GO TO STEP 1

    OK

  3. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (OPEN)


    1. A01BDWYE01

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

    2. Using a service wire, connect B4-30 (+SL) and B4-28 (-SL) of connector "B".

      Note

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

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

      Resistance
      Tester connection Condition Specified condition

      A13-2 (+SL) -

      A13-1 (-SL)

      		 Always Below 1 Ω

    NG

    CHECK ENGINE ROOM MAIN WIRE (OPEN) Click here

    OK

  4. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (SHORT)


    1. A01BHFBE02

      Disconnect the service wire from connector "B".

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

      Resistance
      Tester connection Condition Specified condition

      A13-2 (+SL) -

      A13-1 (-SL)

      		 Always 1 MΩ or higher

    NG

    CHECK ENGINE ROOM MAIN WIRE (SHORT) Click here

    OK

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


    1. A01BHFBE02

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

      Resistance
      Tester connection Condition Specified condition

      A13-2 (+SL) -

      Body ground

      		 Always 1 MΩ or higher

      A13-1 (-SL) -

      Body ground

      		 Always 1 MΩ or higher

    NG

    CHECK ENGINE ROOM MAIN WIRE (SHORT TO GROUND) Click here

    OK

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


    1. A01BHFBE02

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

    2. Turn the ignition switch to the ON position.

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

      Voltage
      Tester connection Condition Specified condition

      A13-2 (+SL) -

      Body ground

      		 Ignition switch ON Below 1 V

      A13-1 (-SL) -

      Body ground

      		 Ignition switch ON Below 1 V

    NG

    CHECK ENGINE ROOM MAIN WIRE (SHORT TO B+) Click here

    OK

  7. CHECK FRONT AIRBAG SENSOR LH


    1. A01BEPKE01

      Connect the connectors to the center airbag sensor assembly.

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

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

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

    5. Clear the DTCs stored in memory Click here.

    6. Turn the ignition switch to the LOCK position.

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

    8. Check the DTCs Click here.

      Result
      Result Proceed to
      DTC B1615/14 is output. A
      DTC B1610/13 is output. B
      DTC B1610/13 and B1615/14 are not output. C

      Tech Tips

      Codes other than DTC B1610/13 and B1615/14 may be output at this time, but they are not related to this check.


    A

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY

    B

    REPLACE FRONT AIRBAG SENSOR LH

    C

    USE SIMULATION METHOD TO CHECK

  8. CHECK ENGINE ROOM MAIN WIRE (OPEN)


    1. A01BHJQE01

      Disconnect the engine room main wire connector from the wiring cowl to headlight harness assembly.

      Tech Tips

      The service wire has already been inserted into connector "B".

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

      Resistance
      Tester connection Condition Specified condition

      AB2-2 (+SL) -

      AB2-4 (-SL)

      		 Always Below 1 Ω

    NG

    REPAIR OR REPLACE ENGINE ROOM MAIN WIRE

    OK

    REPAIR OR REPLACE WIRING COWL TO HEADLIGHT HARNESS ASSEMBLY

  9. CHECK ENGINE ROOM MAIN WIRE (SHORT)


    1. A01BGRTE02

      Disconnect the engine room main wire connector from the wiring cowl to headlight harness assembly.

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

      Resistance
      Tester connection Condition Specified condition

      AB2-2 (+SL) -

      AB2-4 (-SL)

      		 Always 1 MΩ or higher

    NG

    REPAIR OR REPLACE ENGINE ROOM MAIN WIRE

    OK

    REPAIR OR REPLACE WIRING COWL TO HEADLIGHT HARNESS ASSEMBLY

  10. CHECK ENGINE ROOM MAIN WIRE (SHORT TO GROUND)


    1. A01BGRTE02

      Disconnect the engine room main wire connector from the wiring cowl to headlight harness assembly.

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

      Resistance
      Tester connection Condition Specified condition

      AB2-2 (+SL) -

      Body ground

      		 Always 1 MΩ or higher

      AB2-4 (-SL) -

      Body ground

      		 Always 1 MΩ or higher

    NG

    REPAIR OR REPLACE ENGINE ROOM MAIN WIRE

    OK

    REPAIR OR REPLACE WIRING COWL TO HEADLIGHT HARNESS ASSEMBLY

  11. CHECK ENGINE ROOM MAIN WIRE (SHORT TO B+)


    1. A01BGRTE02

      Turn the ignition switch to the LOCK position.

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

    3. Disconnect the engine room main wire connector from the wiring cowl to headlight harness assembly.

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

    5. Turn the ignition switch to the ON position.

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

      Voltage
      Tester connection Condition Specified condition

      AB2-2 (+SL) -

      Body ground

      		 Ignition switch ON Below 1 V

      AB2-4 (-SL) -

      Body ground

      		 Ignition switch ON Below 1 V

    NG

    REPAIR OR REPLACE ENGINE ROOM MAIN WIRE

    OK

    REPAIR OR REPLACE WIRING COWL TO HEADLIGHT HARNESS ASSEMBLY