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 assembly and front airbag sensor RH.

The front airbag sensor RH detects impacts to the vehicle and sends signals to the center airbag sensor assembly 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

B1613/83

One of the following conditions is met:


  • The center airbag sensor assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or 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 assembly malfunction.

  • Instrument panel wire

  • Engine room main wire

  • Front airbag sensor RH

  • Center airbag sensor assembly

WIRING DIAGRAM

A000OKRE10
*a Front Airbag Sensor RH
*b Center 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.

PROCEDURE


  1. 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 center airbag sensor assembly and 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 assembly and front airbag sensor RH.

    2. A000RBUE01
      Text in Illustration
      *1 Front Airbag Sensor RH
      *2 Center Airbag Sensor Assembly

      Check that the connectors (on the center airbag sensor assembly 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 (-) auxiliary battery terminal, and wait for at least 2 seconds.

      A000QSDE04
      Text in Illustration
      *1 Front Airbag Sensor RH *2 Center Airbag Sensor Assembly
      *3 Connector E *4 Connector B
      *5 Service Wire - -
      *a

      Front view of wire harness connector

      (to Front Airbag Sensor RH)

      		 *b

      Rear view of wire harness connector

      (to Center Airbag Sensor Assembly)

    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
      A45-2 (+SR) - Body ground Power switch on (IG) Below 1 V
      A45-1 (-SR) - 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 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.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A45-2 (+SR) - A45-1 (-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
      A45-2 (+SR) - A45-1 (-SR) Always 1 MΩ or higher
      A45-2 (+SR) - Body ground Always 1 MΩ or higher
      A45-1 (-SR) - Body ground Always 1 MΩ or higher

    NG

    CHECK INSTRUMENT PANEL WIRE Click here

    OK

  4. CHECK FRONT AIRBAG SENSOR RH


    1. A000OQJE20
      Text in Illustration
      *1 Front Airbag Sensor LH
      *2 Center Airbag Sensor Assembly

      Connect the connectors to the center airbag sensor assembly.

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

    3. Connect the cable to 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.

    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.

      Result
      Result Proceed to
      DTC B1612/83 or B1613/83 is output A
      DTC B1617/84 or B1618/84 is output B
      DTC B1612/83, B1613/83, B1617/84 and B1618/84 are not output C

      Tech Tips

      Codes other than DTC B1612/83, B1613/83, B1617/84 and B1618/84 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 front airbag sensor LH and RH to their original positions and connect the connectors to them.


    C

    USE SIMULATION METHOD TO CHECK Click here

    A

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    B

    REPLACE FRONT AIRBAG SENSOR RH Click here

  5. CHECK INSTRUMENT PANEL WIRE


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

      A000RYRE04
      Text in Illustration
      *1 Front Airbag Sensor RH *2 Center Airbag Sensor Assembly
      *3 Engine Room Main Wire *4 Instrument Panel Wire
      *5 Connector C *6 Connector B
      *7 Service Wire - -
      *a

      Front view of wire harness connector

      (to Engine Room Main Wire)

      		 *b

      Rear view of wire harness connector

      (to Center Airbag Sensor Assembly)

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

    3. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      NA6-2 (+SR) - Body ground Power switch on (IG) Below 1 V
      NA6-1 (-SR) - Body ground Power switch on (IG) Below 1 V

    5. Turn the power switch off.

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

    7. 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.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      NA6-2 (+SR) - NA6-1 (-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
      NA6-2 (+SR) - NA6-1 (-SR) Always 1 MΩ or higher
      NA6-2 (+SR) - Body ground Always 1 MΩ or higher
      NA6-1 (-SR) - Body ground Always 1 MΩ or higher

    OK

    REPLACE ENGINE ROOM MAIN WIRE

    NG

    REPLACE INSTRUMENT PANEL WIRE