AIRBAG SYSTEM, Diagnostic DTC:B1622/81, B1627/82

DTC Code DTC Name
B1622/81 Lost communication with Side Airbag Sensor RH
B1627/82 Lost communication with Side Airbag Sensor LH

DESCRIPTION

The side airbag sensor assembly LH/RH detect impacts to the vehicle and send signals to the center airbag sensor assembly to determine if the airbag should be deployed.

DTC B1622/81 or B1627/82 is stored when a malfunction is detected in the circuit for the side airbag sensor assembly LH/RH.

DTC Code DTC Detection Condition Trouble Area
B1622/81

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 circuit for the side airbag sensor assembly RH for 2 seconds.

  • A side airbag sensor assembly RH malfunction.

  • A center airbag sensor assembly malfunction.

  • No. 2 floor wire

  • Side airbag sensor assembly RH

  • Center airbag sensor assembly
B1627/82

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 circuit for the side airbag sensor assembly LH for 2 seconds.

  • A side airbag sensor assembly LH malfunction.

  • A center airbag sensor assembly malfunction.

  • Floor wire

  • Side airbag sensor assembly LH

  • Center airbag sensor assembly

WIRING DIAGRAM

A00OM34E01
A00OM34E02

INSPECTION PROCEDURE

Note


  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work Click here.

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

PROCEDURE


  1. CHECK FOR DTC


    1. Turn the ignition switch off.

      Tech Tips

      If a communication error occurs, DTCs for both the LH and RH sides will be stored simultaneously. The malfunctioning area can be identified by turning the ignition switch off and then to ON again.

    2. Turn the ignition switch to ON, and wait for at least 60 seconds.

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1622/81, B1623/81 or B1643/81 is output A
      DTC B1627/82 , B1628 or B1648/82 is output B
      DTC B1622/81 and B1627/82 are not output C

      Tech Tips

      Codes other than DTC B1622/81 and B1627/82 may be output at this time, but they are not related to this check.


    B

    CHECK CONNECTION OF CONNECTORS Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK CONNECTION OF CONNECTORS


    1. Turn the ignition switch off.

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

    3. Check that the connectors are properly connected to the center airbag sensor assembly and side airbag sensor assembly RH.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  3. CHECK CONNECTORS


    1. Disconnect the connectors from the center airbag sensor assembly and side airbag sensor assembly RH.

    2. A00OLRGE01
      Text in Illustration
      *1 Side Airbag Sensor Assembly RH
      *2 Center Airbag Sensor Assembly

      Check that the connectors (on the center airbag sensor assembly side and side airbag sensor assembly RH side) are not damaged.

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  4. CHECK NO. 2 FLOOR WIRE


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

      A00OK9JE03
      Text in Illustration
      *1 Side Airbag Sensor Assembly RH *2 Center Airbag Sensor Assembly
      *3 No. 2 Floor Wire *4 Connector C
      *5 Connector B *6 Service Wire
      *a

      Rear view of wire harness connector

      (to Side Airbag Sensor Assembly RH)

      		 *b

      Rear view of wire harness connector

      (to Center Airbag Sensor Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      H7-2 (BBR+) - Body ground Ignition switch ON Below 1 V
      H7-1 (BBR-) - Body ground Ignition switch ON Below 1 V

    3. Turn the ignition switch off.

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

    5. Using a service wire, connect terminals 8 (BBR+) and 11 (BBR-) of connector B.

      Note

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H7-2 (BBR+) - H7-1 (BBR-) Always Below 1 Ω

    7. Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H7-2 (BBR+) - H7-1 (BBR-) Always 1 MΩ or higher
      H7-2 (BBR+) - Body ground Always 1 MΩ or higher
      H7-1 (BBR-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  5. CHECK SIDE AIRBAG SENSOR ASSEMBLY RH


    1. A00ON7TE01
      Text in Illustration
      *1 Side Airbag Sensor Assembly LH
      *2 Center Airbag Sensor Assembly

      Connect the connector to the center airbag sensor assembly.

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

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

    4. Turn the ignition switch to ON, and wait for at least 60 seconds.

    5. Clear the DTCs stored in memory Click here.

    6. Turn the ignition switch off.

    7. Turn the ignition switch to ON, and wait for at least 60 seconds.

    8. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1622/81 and B1627/82 are not output A
      DTC B1627/82 is output B
      DTC B1622/81 is output C

      Tech Tips

      Codes other than DTC B1622/81 and B1627/82 may be output at this time, but they are not related to this check.

    9. Turn the ignition switch off.

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

    11. Return the side airbag sensor assembly LH and RH to their original positions and connect the connectors to them.


    B

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH Click here

    C

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  6. CHECK CONNECTION OF CONNECTORS


    1. Turn the ignition switch off.

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

    3. Check that the connectors are properly connected to the center airbag sensor assembly and side airbag sensor assembly LH.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  7. CHECK CONNECTORS


    1. A00OLZ7E01
      Text in Illustration
      *1 Side Airbag Sensor Assembly LH
      *2 Center Airbag Sensor Assembly

      Disconnect the connectors from the center airbag sensor assembly and side airbag sensor assembly LH.

    2. Check that the connectors (on the center airbag sensor assembly side and side airbag sensor assembly LH side) are not damaged.

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE FLOOR WIRE

    OK

  8. CHECK FLOOR WIRE


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

      A00OHWRE03
      Text in Illustration
      *1 Side Airbag Sensor Assembly LH *2 Center Airbag Sensor Assembly
      *3 Floor Wire *4 Connector C
      *5 Connector B *6 Service Wire
      *a

      Rear view of wire harness connector

      (to Side Airbag Sensor Assembly LH)

      		 *b

      Rear view of wire harness connector

      (to Center Airbag Sensor Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G9-2 (BBL+) - Body ground Ignition switch ON Below 1 V
      G9-1 (BBL-) - Body ground Ignition switch ON Below 1 V

    3. Turn the ignition switch off.

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

    5. Using a service wire, connect terminals 8 (BBL+) and 15 (BBL-) of connector B.

      Note

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G9-2 (BBL+) - G9-1 (BBL-) Always Below 1 Ω

    7. Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G9-2 (BBL+) - G9-1 (BBL-) Always 1 MΩ or higher
      G9-2 (BBL+) - Body ground Always 1 MΩ or higher
      G9-1 (BBL-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE FLOOR WIRE

    OK

  9. CHECK SIDE AIRBAG SENSOR ASSEMBLY LH


    1. A00ONCKE01
      Text in Illustration
      *1 Side Airbag Sensor Assembly RH
      *2 Center Airbag Sensor Assembly

      Connect the connector to the center airbag sensor assembly.

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

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

    4. Turn the ignition switch to ON, and wait for at least 60 seconds.

    5. Clear the DTCs stored in memory Click here.

    6. Turn the ignition switch off.

    7. Turn the ignition switch to ON, and wait for at least 60 seconds.

    8. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1622/81 and B1627/82 are not output A
      DTC B1622/81 is output B
      DTC B1627/82 is output C

      Tech Tips

      Codes other than DTC B1622/81 and B1627/82 may be output at this time, but they are not related to this check.

    9. Turn the ignition switch off.

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

    11. Return the side airbag sensor assembly RH and LH to their original positions and connect the connectors to them.


    B

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH Click here

    C

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here