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.

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 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 airbag sensor RH circuit.

  • Front airbag sensor RH malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • Engine room main wire

  • Front airbag sensor RH

  • Center airbag sensor assembly

WIRING DIAGRAM

A003SHTE31

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK CONNECTORS


    1. Turn the power switch off.

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

      CAUTION:

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

    3. Check that the connectors are properly connected to the center airbag sensor 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 center airbag sensor 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. Connect the connectors that link the engine room main wire and instrument panel wire.

      A003TX1E13

    2. Using SST, connect terminals 29 (+SR) and 27 (-SR) of connector B.

      Note

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

      SST
      09843-18040

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A21-2 (+SR) - A21-1 (-SR) Always Below 1 Ω
      Text in Illustration
      *1 Front Airbag Sensor RH *2 Center Airbag Sensor Assembly
      *3 Connector B *4 Connector E
      *a

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)

      		 *b

      Front view of wire harness connector

      (to Front Airbag Sensor RH)

    NG

    CHECK INSTRUMENT PANEL WIRE (OPEN) Click here

    OK

  3. CHECK FRONT AIRBAG SENSOR RH CIRCUIT (SHORT)


    1. A003T5CE31
      Text in Illustration
      *1 Front Airbag Sensor RH
      *2 Center Airbag Sensor Assembly
      *3 Connector E
      *a

      Front view of wire harness connector

      (to Front Airbag Sensor RH)

      Disconnect SST from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A21-2 (+SR) - A21-1 (-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. A003T5CE31
      Text in Illustration
      *1 Front Airbag Sensor RH
      *2 Center Airbag Sensor Assembly
      *3 Connector E
      *a

      Front view of wire harness connector

      (to Front Airbag Sensor RH)

      Connect the cable to the negative (-) 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 Switch Condition Specified Condition
      A21-2 (+SR) - Body ground Power switch on (IG) Below 1 V
      A21-1 (-SR) - Body ground Power switch on (IG) Below 1 V

    NG

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

    OK

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


    1. A003T5CE31
      Text in Illustration
      *1 Front Airbag Sensor RH
      *2 Center Airbag Sensor Assembly
      *3 Connector E
      *a

      Front view of wire harness connector

      (to Front Airbag Sensor RH)

      Turn the power switch off.

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

      CAUTION:

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A21-2 (+SR) - Body ground Always 1 MΩ or higher
      A21-1 (-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. A003T8TE03
      Text in Illustration
      *1 Front Airbag Sensor LH
      *2 Center Airbag Sensor Assembly

      Connect the connector to the center airbag sensor assembly.

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

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

    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
      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.


    B

    REPLACE FRONT AIRBAG SENSOR RH Click here

    C

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  7. CHECK INSTRUMENT PANEL WIRE (OPEN)


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

      A003TT2E06

      Tech Tips

      SST 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
      AE8-2 (+SR) - AE8-1 (-SR) Always Below 1 Ω
      Text in Illustration
      *1 Front Airbag Sensor RH *2 Center Airbag Sensor Assembly
      *3 Engine Room Main Wire *4 Instrument Panel Wire
      *5 Connector B *6 Connector C
      *a

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)

      		 *b

      Front view of wire harness connector

      (to Engine Room Main Wire)

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

    REPLACE ENGINE ROOM MAIN WIRE

  8. CHECK INSTRUMENT PANEL WIRE (SHORT)


    1. A003SCNE19
      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
      *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
      AE8-2 (+SR) - AE8-1 (-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. A003SCNE19
      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
      *a

      Front view of wire harness connector

      (to Engine Room Main Wire)

      Turn the power switch off.

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

      CAUTION:

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

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

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

    5. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      AE8-2 (+SR) - Body ground Power switch on (IG) Below 1 V
      AE8-1 (-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. A003SCNE19
      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
      *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
      AE8-2 (+SR) - Body ground Always 1 MΩ or higher
      AE8-1 (-SR) - Body ground Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

    REPLACE ENGINE ROOM MAIN WIRE