AIRBAG SYSTEM, Diagnostic DTC:B162B/81, B162C/85, B1691/85, B1694/85

DTC Code DTC Name
B162B/81 Side Airbag Sensor Assembly No.2 Lost Communication (RH)
B162C/85 Side Airbag Sensor Assembly No.2 Initialization Error (RH)
B1691/85 Lost Communication with No.2 Side Satellite Sensor Bus RH
B1694/85 Side Satellite Sensor No. 2 Bus RH Initialization Incomplete

DESCRIPTION

The No.2 side airbag sensor assembly RH is composed of a safing sensor, diagnostic circuit, lateral deceleration sensor, etc. When the airbag sensor assembly receives a signal from the lateral deceleration sensor, the airbag sensor assembly judges whether the SRS should be activated.If a malfunction is detected in the side satellite sensor bus circuit, the airbag sensor assembly stores DTCs B162B/81,B162C/85,B1691/85,and/or B1694/85.

DTC No. Detection Item DTC Detection Condition Trouble Area Test Mode / Check Mode
B162B/81 Side Airbag Sensor Assembly No.2 Lost Communication (RH)

  • The airbag sensor assembly detectsa line short, short to ground or B+,or an open in the No.2 side airbagsensor assembly RH circuit.

  • No.2 side airbag sensor assemblyRH malfunction

  • Airbag sensor assembly malfunction

  • No.2 Floor wire

  • No.2 side airbag sensorassembly RH

  • Airbag sensor assembly

 Does notapply totest/checkmode
B162C/85 Side Airbag Sensor Assembly No.2 Initialization Error (RH)

  • The airbag sensor assembly detectsa line short, short to ground or B+,or an open in the No.2 side airbagsensor assembly RH circuit.

  • No.2 side airbag sensor assemblyRH malfunction

  • Airbag sensor assembly malfunction

  • No.2 Floor wire

  • No.2 side airbag sensorassembly RH

  • Airbag sensor assembly

 Does notapply totest/checkmode
B1691/85 Lost Communication with No.2 Side Satellite Sensor Bus RH

  • The airbag sensor assembly detectsa line short, short to ground or B+,or an open in the No.2 side airbagsensor assembly RH circuit.

  • No.2 side airbag sensor assemblyRH malfunction

  • Airbag sensor assembly malfunction

  • No.2 Floor wire

  • No.2 side airbag sensorassembly RH

  • Airbag sensor assembly

 Does notapply totest/checkmode
B1694/85 Side Satellite Sensor No. 2 Bus RH Initialization Incomplete

  • The airbag sensor assembly detects a line short, short to ground or B+,or an open in the No.2 side airbag sensor assembly RH circuit.

  • No.2 side airbag sensor assembly RH malfunction

  • Airbag sensor assembly malfunction

  • No.2 Floor wire

  • No.2 side airbag sensor assembly RH

  • Airbag sensor assembly

 Does not apply to test/check mode

WIRING DIAGRAM

A01MH94E04
*a BFR+
*b BFR-
*c No.2 Side Airbag Sensor Assembly RH
*d 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

Tech Tips

To reproduce the DTC, wiggle each of the SRS airbag system connectors, or drive the vehicle on actual city roads or rough roads.

Click here

PROCEDURE


  1. CHECK DTC


    1. Turn the power switch off.

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

    3. Clear the DTCs stored in memory.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    4. Turn the power switch off.

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

    6. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Result Proceed to
      DTC B162B/81, B162C/85, B1691/85, B1694/85 is output A
      DTC B162B/81, B162C/85, B1691/85, B1694/85 is not output B

      Tech Tips

      Codes other than DTC B162B/81, B162C/85, B1691/85 and B1694/85 may be output at this time, but they are not related to this check.


    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK CONNECTION OF CONNECTORS


    1. Turn the power switch off.

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

    3. Check that the connectors are properly connected to the airbag sensor assembly and No.2 side airbag sensor assembly RH.

      OK
      The connectors are properly connected.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  3. CHECK CONNECTORS


    1. A01MHL6C01
      *1 No. 2 Side Airbag Sensor Assembly RH
      *2 Airbag Sensor Assembly
      *3 No. 2 Floor Wire

      Disconnect the connectors from the airbag sensor assembly and No. 2 side airbag sensor assembly RH.

    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 NO. 2 FLOOR WIRE

    OK

  4. CHECK NO. 2 SIDE AIRBAG SENSOR ASSEMBLY RH CIRCUIT


    1. A01MHRMC02
      *1 No.2 Side Airbag Sensor Assembly RH
      *2 Airbag Sensor Assembly
      *3 No.2 Floor Wire
      *a

      Front view of wire harness connector

      (to No.2 Side Airbag Sensor Assembly RH)
      *b

      Rear view of wire harness connector

      (to Airbag sensor Assembly)
      *c Service Wire

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

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Q7-2 (BFR+) - Body ground Power switch on (IG) Below 1 V
      Q7-1 (BFR-) - Body ground Power switch on (IG) Below 1 V

    4. Turn the power switch off.

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

    6. Using a service wire, connect terminals 20 (BCR+) - 19 (BCR-) of connector B.

      Note

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q7-2 (BFR+) - Q7-1 (BFR-) 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
      Q7-2 (BFR+) - Q7-1 (BFR-) Always 1 MΩ or higher

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q7-2 (BFR+) - Body ground Always 1 MΩ or higher
      Q7-1 (BFR-) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FLOOR WIRE

    OK

  5. CHECK NO. 2 SIDE AIRBAG SENSOR ASSEMBLY RH


    1. A01MIISC01
      *1 No. 2 Side Airbag Sensor Assembly LH
      *2 Airbag Sensor Assembly

      Connect the connector to airbag sensor assembly.

    2. Interchange the No. 2 side airbag sensor assembly RH with LH and connect the connectors.

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

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

    5. Clear the DTCs stored in memory.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    6. Turn the power switch off.

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

    8. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Result Proceed to
      DTC B162B/81, B162C/85, B1691/85 and B1694/85 are output A
      DTC B163B/86, B163C/86, B1696/86 and B1699/86 are output B
      DTC B162B/81, B162C/85, B163B/86, B163C/86, B1691/85, B1694/85, B1696/86 and B1699/86 are not output C

      Tech Tips

      Codes other than B162B/81, B162C/85, B163B/86, B163C/86, B1691/85, B1694/85, B1696/86 and B1699/86 may be output at this time, but they are not related to this check.

    9. Turn the power switch off.

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

    11. Return the No. 2 side airbag sensor assembly RH and LH to their original positions and connect the connectors.


    A

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    B

    REPLACE NO. 2 SIDE AIRBAG SENSOR ASSEMBLY RH Click here

    C

    USE SIMULATION METHOD TO CHECK Click here