AIRBAG SYSTEM, Diagnostic DTC:B161A/8A

DTC Code DTC Name
B161A/8A Lost Communication with Front Satellite Sensor Bus

DESCRIPTION

The front collision sensor circuit is composed of the center airbag sensor assembly and front airbag sensor.

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

DTC B161A/8A is stored when a malfunction is detected in the front collision sensor circuit.

DTC No. DTC Detection Condition Trouble Area
B161A/8A

  • The center airbag sensor assembly 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 collision sensor circuit.

  • Front airbag sensor malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • Engine room main wire

  • Front airbag sensor

  • Center airbag sensor assembly

WIRING DIAGRAM

A005GKSE24
*a FRONT AIRBAG SENSOR
*b CENTER AIRBAG SENSOR ASSEMBLY

PROCEDURE


  1. CHECK DTC


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

    2. Turn the ignition switch off.

      Tech Tips

      If a communication error occurs, DTC will be stored simultaneously. To identify the malfunctioning area, turn the ignition switch off and then to ON again.

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

    4. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B161D/9A is not output. A
      DTC B161D/9A is output. B

      Tech Tips


      • DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the ignition switch off and then to ON again.

      • Codes other than DTCs B1613/83 and B1618/84 may be output at this time, but they are not related to this check.


    B

    GO TO DTC B161D/9A Click here

    A

  2. CHECK CENTER AIRBAG SENSOR ASSEMBLY


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

    2. Clear the DTCs stored in the memory Click here.

    3. Turn the ignition switch off.

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

    5. Check for DTCs Click here.

      OK
      DTC B161A/8A is not output.

      Tech Tips

      Codes other than DTC B161A/8A may be output at this time, but they are not related to this check.


    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here