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 airbag ECU assembly and front airbag sensor RH.

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

These DTCs are stored when a malfunction is detected in the front airbag sensor RH circuit.

DTC No. DTC Detection Condition Trouble Area

B1612/83

B1613/83

  • The airbag ECU 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 airbag sensor RH circuit.

  • Front airbag sensor RH malfunction

  • Airbag ECU assembly malfunction

  • Instrument panel wire

  • Engine room main wire

  • Front airbag sensor RH

  • Airbag ECU assembly

WIRING DIAGRAM

A0040K6E17

INSPECTION PROCEDURE

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.

PROCEDURE


  1. CHECK CONNECTORS


    1. Turn the power switch off.

    2. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    3. Check that the connectors are properly connected to the airbag ECU assembly and front airbag sensor RH. Also check that the connectors that link the engine room main wire and instrument panel wire are properly connected.

      OK
      The connectors are properly connected.

      Tech Tips

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the airbag ECU assembly and front airbag sensor RH. Also disconnect the connectors that link the engine room main wire and instrument panel wire.

    5. Check that the terminals of the connectors are not damaged.

      OK
      The terminals are not deformed or damaged.

    NG

    REPLACE WIRE HARNESS

    OK

  2. CHECK FRONT AIRBAG SENSOR RH CIRCUIT (OPEN)


    1. A0042QKE09
      Text in Illustration
      *1 Front Airbag Sensor RH
      *2 Airbag ECU Assembly
      *3 Service Wire
      *a

      Front view of wire harness connector

      (to Airbag ECU Assembly)
      *b

      Front view of wire harness connector

      (to Front Airbag Sensor RH)

      Connect the connectors that link the engine room main wire and instrument panel wire.

    2. 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 the wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A46-2 (+SR) - A46-1 (-SR) Always Below 1 Ω

    NG

    CHECK INSTRUMENT PANEL WIRE (OPEN) Click here

    OK

  3. CHECK FRONT AIRBAG SENSOR RH CIRCUIT (SHORT)


    1. A0041JYE15
      Text in Illustration
      *1 Front Airbag Sensor RH
      *2 Airbag ECU Assembly
      *a

      Front view of wire harness connector

      (to Front Airbag Sensor RH)

      Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A46-2 (+SR) - A46-1 (-SR) Always 1 MΩ or higher

    NG

    CHECK INSTRUMENT PANEL WIRE (SHORT) Click here

    OK

  4. CHECK FRONT AIRBAG SENSOR RH CIRCUIT (SHORT TO B+)


    1. A0041JYE15
      Text in Illustration
      *1 Front Airbag Sensor RH
      *2 Airbag ECU Assembly
      *a

      Front view of wire harness connector

      (to Front Airbag Sensor RH)

      Connect the cable to the negative (-) auxiliary battery terminal.

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A46-2 (+SR) - Body ground Power switch on (IG) Below 1 V
      A46-1 (-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.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.


    NG

    CHECK INSTRUMENT PANEL WIRE (SHORT TO B+) Click here

    OK

  5. CHECK FRONT AIRBAG SENSOR RH CIRCUIT (SHORT TO GROUND)


    1. A0041JYE15
      Text in Illustration
      *1 Front Airbag Sensor RH
      *2 Airbag ECU Assembly
      *a

      Front view of wire harness connector

      (to Front Airbag Sensor RH)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A46-2 (+SR) - Body ground Always 1 MΩ or higher
      A46-1 (-SR) - Body ground Always 1 MΩ or higher

    NG

    CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND) Click here

    OK

  6. CHECK FRONT AIRBAG SENSOR RH


    1. A0043JQE01
      Text in Illustration
      *1 Front Airbag Sensor LH
      *2 Airbag ECU Assembly

      Connect the connector to the airbag ECU assembly.

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

    3. Connect the cable to the negative (-) auxiliary battery terminal.

    4. Clear the DTCs stored in memory Click here.

    5. Turn the power switch off.

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

    7. Check for DTCs Click here.

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

      Tech Tips

      Codes other than DTCs B1612/83, B1613/83, B1617/84 and B1618/84 may be output at this time, but they are not related to this check.

    8. Turn the power switch off.

    9. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    10. Return the front airbag sensor RH and LH to their original positions and connect the connectors.


    B

    REPLACE FRONT AIRBAG SENSOR RH Click here

    C

    REPLACE AIRBAG ECU ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  7. CHECK INSTRUMENT PANEL WIRE (OPEN)


    1. A0041XUE05
      Text in Illustration
      *1 Front Airbag Sensor RH
      *2 Airbag ECU Assembly
      *3 Engine Room Main Wire
      *4 Instrument Panel Wire
      *5 Service Wire
      *a

      Front view of wire harness connector

      (to Airbag ECU Assembly)
      *b

      Front view of wire harness connector

      (to Engine Room Main Wire)

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

      Tech Tips

      The service wire has already been inserted into connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      AL9-1 (+SR) - AL9-2 (-SR) Always Below 1 Ω

    3. Disconnect the service wire from connector B.


    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

    REPLACE ENGINE ROOM MAIN WIRE

  8. CHECK INSTRUMENT PANEL WIRE (SHORT)


    1. A0040IQE03
      Text in Illustration
      *1 Front Airbag Sensor RH
      *2 Airbag ECU Assembly
      *3 Engine Room Main Wire
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Engine Room Main Wire)

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      AL9-1 (+SR) - AL9-2 (-SR) Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

    REPLACE ENGINE ROOM MAIN WIRE

  9. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)


    1. A0040IQE03
      Text in Illustration
      *1 Front Airbag Sensor RH
      *2 Airbag ECU Assembly
      *3 Engine Room Main Wire
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Engine Room Main Wire)

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

    2. Connect the cable to the negative (-) auxiliary battery terminal.

    3. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      AL9-1 (+SR) - Body ground Power switch on (IG) Below 1 V
      AL9-2 (-SR) - Body ground Power switch on (IG) Below 1 V

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

    REPLACE ENGINE ROOM MAIN WIRE

  10. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)


    1. A0040IQE03
      Text in Illustration
      *1 Front Airbag Sensor RH
      *2 Airbag ECU Assembly
      *3 Engine Room Main Wire
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Engine Room Main Wire)

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      AL9-1 (+SR) - Body ground Always 1 MΩ or higher
      AL9-2 (-SR) - Body ground Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

    REPLACE ENGINE ROOM MAIN WIRE