AIRBAG SYSTEM, Diagnostic DTC:B1612/83, B1613/83

DTC Code DTC Name
B1612/83 Lost Communication with Front Airbag Sensor RH
B1613/83 Front Airbag Sensor RH Initialization Incomplete

DESCRIPTION

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

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

DTC B1612/83 or B1613/83 is stored when a malfunction is detected in the front airbag sensor RH circuit.

DTC Code DTC Detection Condition Trouble Area
B1612/83

When one of the following conditions is met:


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

  • A front airbag sensor RH malfunction.

  • A center airbag sensor malfunction.

  • Instrument panel wire

  • Engine room main wire

  • Front airbag sensor RH

  • Center airbag sensor assembly
B1613/83

When one of the following conditions is met:


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

  • A front airbag sensor RH malfunction.

  • A center airbag sensor malfunction.

  • Instrument panel wire

  • Engine room main wire

  • Front airbag sensor RH

  • Center airbag sensor assembly

WIRING DIAGRAM

B001Z38E36
*a Front Airbag Sensor RH
*b Center Airbag Sensor

CAUTION / NOTICE / HINT

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, some systems need to be initialized after the cable is reconnected Click here.

  • After replacing the center airbag sensor assembly, refer to initialization 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 the front airbag sensor RH.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  2. CHECK CONNECTORS


    1. Disconnect the connectors from the center airbag sensor and front airbag sensor RH.

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

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE HARNESS AND CONNECTOR

    OK

  3. CHECK FRONT AIRBAG SENSOR RH CIRCUIT


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

      B001Z9EE01

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A6-2 (+SR) - Body ground Ignition switch ON Below 1 V
      A6-1 (-SR) - 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 29 (+SR) and 27 (-SR) 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
      A6-2 (+SR) - A6-1 (-SR) 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
      A6-2 (+SR) - A6-1 (-SR) Always 1 MΩ or higher
      A6-2 (+SR) - Body ground Always 1 MΩ or higher
      A6-1 (-SR) - 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 RH


    1. B001YIYE03
      *1 w/ Side Airbag:
      *2 Front Airbag Sensor LH
      *3 Center Airbag Sensor
      *4 w/o Side Airbag:

      Connect the connectors to the center airbag sensor.

    2. Interchange the front airbag sensor RH with LH 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 B1612, B1613, B1617 and B1618 are not output A
      DTC B1617 or B1618 is output B
      DTC B1612 or B1613 is output C

      Tech Tips

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


    C

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE FRONT AIRBAG SENSOR RH Click here

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


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

      B001YCNE02

    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
      AE2-1 (+SR) - Body ground Ignition switch ON Below 1 V
      AE2-2 (-SR) - 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 terminal 29 (+SR) and 27 (-SR) of connector B.

      Note

      Do not forcibly insert the service wire into the terminal 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
      AE2-1 (+SR) - AE2-2 (-SR) 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
      AE2-1 (+SR) - AE2-2 (-SR) Always 1 MΩ or higher
      AE2-1 (+SR) - Body ground Always 1 MΩ or higher
      AE2-2 (-SR) - Body ground Always 1 MΩ or higher

    OK

    REPLACE ENGINE ROOM MAIN WIRE

    NG

    REPLACE INSTRUMENT PANEL WIRE