AIRBAG SYSTEM, Diagnostic DTC:B1602/83, B1607/84, B161A/8A

DTC Code DTC Name
B1602/83 Lost Communication with Front Satellite Sensor Bus RH
B1607/84 Lost Communication with Front Satellite Sensor Bus LH
B161A/8A Lost Communication with Front Satellite Sensor Bus

DESCRIPTION

The front collision sensor circuit (front airbag sensor RH circuit and front airbag sensor LH circuit) is composed of the airbag sensor assembly, front airbag sensor RH and front airbag sensor LH.

The front airbag sensor RH and front airbag sensor LH detect impacts to the vehicle and send 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 collision sensor circuit (front airbag sensor RH circuit and front airbag sensor LH circuit).

DTC No. Detection Item DTC Detection Condition Trouble Area Test Mode / Check Mode
B1602/83 Lost Communication with Front Satellite Sensor Bus RH
  • The airbag sensor assembly detects a line short, short to ground or B+, or an open in the front collision sensor circuit (front airbag sensor RH circuit and front airbag sensor LH circuit).

  • Front airbag sensor RH malfunction

  • Front airbag sensor LH malfunction

  • Airbag sensor assembly malfunction


  • Instrument panel wire

  • Engine room main wire

  • Front airbag sensor RH

  • Front airbag sensor LH

  • Airbag sensor assembly

Does not apply to test/check mode
B1607/84 Lost Communication with Front Satellite Sensor Bus LH
  • The airbag sensor assembly detects a line short, short to ground or B+, or an open in the front collision sensor circuit (front airbag sensor RH circuit and front airbag sensor LH circuit).

  • Front airbag sensor RH malfunction

  • Front airbag sensor LH malfunction

  • Airbag sensor assembly malfunction


  • Instrument panel wire

  • Engine room main wire

  • Front airbag sensor RH

  • Front airbag sensor LH

  • Airbag sensor assembly

Does not apply to test/check mode
B161A/8A Lost Communication with Front Satellite Sensor Bus
  • The airbag sensor assembly detects a line short, short to ground or B+, or an open in the front collision sensor circuit (front airbag sensor RH circuit and front airbag sensor LH circuit).

  • Front airbag sensor RH malfunction

  • Front airbag sensor LH malfunction

  • Airbag sensor assembly malfunction


  • Instrument panel wire

  • Engine room main wire

  • Front airbag sensor RH

  • Front airbag sensor LH

  • Airbag sensor assembly

Does not apply to test/check mode

WIRING DIAGRAM

A01MJY1E01
*a Front Airbag Sensor RH
*b Front Airbag Sensor LH
*c Airbag Sensor Assembly

CAUTION / NOTICE / HINT

Note


  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

    Click here

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

    Click here

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

    Click here

PROCEDURE


  1. CHECK DTC


    1. Turn the power switch on (IG), and wait for at least 60 seconds.

    2. Turn the power switch off.

      Tech Tips

      If a communication error occurs, DTCs for both the LH and RH sides will be stored simultaneously. To identify the malfunctioning area, turn the power switch off and then on (IG) again.

    3. Turn the power switch on (IG), and wait for at least 60 seconds.

    4. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes

      Tech Tips


      • DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the power switch off and then on (IG) again.

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

      Result
      Result Proceed to
      DTCs B1613/83 and B1618/84 are not output. A
      DTC B1613/83 is output. B
      DTC B1618/84 is output. C

    B
    C
    A
  2. CHECK DTC


    1. Clear the DTCs stored in memory.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs
    2. Turn the power switch off.

    3. Turn the power switch on (IG), and wait for at least 60 seconds.

    4. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      OK
      DTCs B1602/83, B1607/84 and B161A/8A are not output.

      Tech Tips

      Codes other than DTCs B1602/83, B1607/84 and B161A/8A may be output at this time, but they are not related to this check.

      Result
      Proceed to
      OK
      NG

    OK
    NG