AIRBAG SYSTEM, Diagnostic DTC:B1612, B1613

DTC Code DTC Name
B1612 Front Airbag Sensor Lost Communication (RH)
B1613 Front Airbag Sensor Initialization Error (RH)

DESCRIPTION

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

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

These DTCs are stored when a malfunction is detected in the front airbag sensor RH circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1612 Front Airbag Sensor Lost Communication (RH)

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

  • Front airbag sensor RH malfunction

  • Airbag sensor assembly malfunction

  • Instrument panel wire

  • Engine room main wire

  • Front airbag sensor RH

  • Airbag sensor assembly

 Comes on Does not apply to test/check mode
B1613 Front Airbag Sensor Initialization Error (RH)

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

  • Front airbag sensor RH malfunction

  • Airbag sensor assembly malfunction

  • Instrument panel wire

  • Engine room main wire

  • Front airbag sensor RH

  • Airbag sensor assembly

 Comes on Does not apply to test/check mode

WIRING DIAGRAM

B0088U2E07
*a Element
*b Interface
*c Front Airbag Sensor RH
*d Airbag Sensor Assembly

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.

Click here

PROCEDURE


  1. CHECK CONNECTION OF 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 RH. 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.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  2. CHECK CONNECTORS


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

    2. Check that the terminals of the connectors are not deformed or damaged.

      OK
      The terminals are not deformed or damaged.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL WIRE OR ENGINE ROOM MAIN WIRE

    OK

  3. CHECK FRONT AIRBAG SENSOR RH CIRCUIT


    1. B008772C01
      *1 Front Airbag Sensor RH
      *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 Front Airbag Sensor RH)

      Connect the connectors that link the engine room main wire and instrument panel 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
      A42-2 (+SR) - Body ground Ignition switch ON Below 1 V
      A42-1 (-SR) - Body ground Ignition switch ON Below 1 V

    5. Turn the ignition switch off.

    6. 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.

    7. Using a service wire, connect terminals 29 (+SR) and 28 (-SR) of connector B.

      Note

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A42-2 (+SR) - A42-1 (-SR) Always Below 1 Ω

    9. Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A42-2 (+SR) - A42-1 (-SR) Always 1 MΩ or higher
      A42-2 (+SR) - Body ground Always 1 MΩ or higher
      A42-1 (-SR) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    CHECK INSTRUMENT PANEL WIRE Click here

    OK

  4. CHECK FRONT AIRBAG SENSOR RH


    1. B0087M2C02
      *1 Front Airbag Sensor LH
      *2 Airbag Sensor Assembly

      Connect the connector to the airbag sensor assembly.

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

    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 memory.


      Body Electrical > SRS Airbag > Clear DTCs

    6. Turn the ignition switch off.

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

    8. Check for DTCs.


      Body Electrical > SRS Airbag > Trouble Codes

      Tech Tips

      Codes other than DTCs B1612, B1613, B1617 and B1618 may be output at this time, but they are not related to this check.

      Result
      Result Proceed to
      DTCs B1612, B1613, B1617 and B1618 are not output. A
      DTC B1617 or B1618 is output. B
      DTC B1612 or B1613 is output. C

    9. Turn the ignition switch off.

    10. 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.

    11. Return the front airbag sensor RH and LH to their original positions and connect the connectors.


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE FRONT AIRBAG SENSOR RH Click here

    C

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

  5. CHECK INSTRUMENT PANEL WIRE


    1. B0085F0C01
      *1 Front Airbag Sensor RH
      *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.

    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
      AK6-1 (+SR) - Body ground Ignition switch ON Below 1 V
      AK6-3 (-SR) - Body ground Ignition switch ON Below 1 V

    5. Turn the ignition switch off.

    6. 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.

    7. Using a service wire, connect terminals 29 (+SR) and 28 (-SR) of connector B.

      Note

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      AK6-1 (+SR) - AK6-3 (-SR) Always Below 1 Ω

    9. Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      AK6-1 (+SR) - AK6-3 (-SR) Always 1 MΩ or higher
      AK6-1 (+SR) - Body ground Always 1 MΩ or higher
      AK6-3 (-SR) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ENGINE ROOM MAIN WIRE

    NG

    REPLACE INSTRUMENT PANEL WIRE