AIRBAG SYSTEM(for Type C), Diagnostic DTC:B1633/81, B1638/82

DTC Code DTC Name
B1633/81 Rear Airbag Sensor Assembly RH Initialization Incomplete
B1638/82 Rear Airbag Sensor Assembly LH Initialization Incomplete

DESCRIPTION

The circuit for the side collision sensor LH or RH is composed of the airbag sensor assembly, door side airbag sensor LH or RH and side airbag sensor assembly LH or RH.

The side airbag sensor assembly LH or RH detects impacts to the vehicle and sends signals to the airbag sensor assembly to determine if the airbag should be deployed.

DTC B1633/81 or B1638/82 is stored when a malfunction is detected in the circuit for the side collision sensor LH or RH.

DTC No. Detection Item DTC Detection Condition Trouble Area
B1633/81 Rear Airbag Sensor Assembly RH Initialization Incomplete

One of the following conditions is met:


  • The 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 collision sensor RH for 2 seconds.

  • A side airbag sensor assembly RH malfunction.

  • An airbag sensor assembly malfunction.

  • Floor wire

  • Side airbag sensor assembly RH

  • Airbag sensor assembly
B1638/82 Rear Airbag Sensor Assembly LH Initialization Incomplete

One of the following conditions is met:


  • The 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 collision sensor LH for 2 seconds.

  • A side airbag sensor assembly LH malfunction.

  • An airbag sensor assembly malfunction.

  • Floor wire

  • Side airbag sensor assembly LH

  • Airbag sensor assembly

WIRING DIAGRAM

Figure 1. for RH Side:

B0025C7E42
*a Airbag Sensor Assembly
*b Side Airbag Sensor Assembly RH
*c Door Side Airbag Sensor RH

Figure 2. for LH Side:

B0025C7E43
*a Airbag Sensor Assembly
*b Side Airbag Sensor Assembly LH
*c Door Side Airbag Sensor LH

CAUTION / NOTICE / HINT

Note


  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices 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

  • After replacing the airbag sensor assembly, refer to initialization.

    Click here

PROCEDURE


  1. CHECK PAST DTC


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

    2. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Proceed to
      DTC B1632/81 and B1637/82 are not output
      DTC B1632/81 and B1637/82 are output

    DTC B1632/81 and B1637/82 are output

    GO TO DTC B1632/81 Click here

    DTC B1632/81 and B1637/82 are not output

  2. CHECK 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


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Proceed to
      DTC B1633/81 is output
      DTC B1638/82 is output
      DTC B1633/81 and B1638/82 are not output

      Tech Tips

      Codes other than DTC B1633/81 and B1638/82 may be output at this time, but they are not related to this check.


    DTC B1638/82 is output

    CHECK CONNECTION OF CONNECTORS Click here

    DTC B1633/81 and B1638/82 are not output

    USE SIMULATION METHOD TO CHECK Click here

    DTC B1633/81 is output

  3. 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 airbag sensor assembly and side airbag sensor assembly RH.

      Result
      Proceed to
      The connectors are properly connected
      The connectors are not properly connected

    The connectors are not properly connected

    CONNECT CONNECTORS PROPERLY

    The connectors are properly connected

  4. CHECK CONNECTORS


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

    2. B00291MC11
      *1 Side Airbag Sensor Assembly RH
      *2 Airbag Sensor Assembly
      *3 Floor Wire

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

      Result
      Proceed to
      The connectors are not deformed or damaged
      The connectors are deformed or damaged

    The connectors are deformed or damaged

    REPLACE FLOOR WIRE

    The connectors are not deformed or damaged

  5. CHECK FLOOR WIRE


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

      B0024YTC11
      *1 Side Airbag Sensor Assembly RH *2 Airbag Sensor Assembly
      *3 Floor Wire *4 Connector C
      *5 Connector B *6 Service Wire
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly RH)

      		 *b

      Rear view of wire harness connector

      (to Airbag Sensor Assembly)

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      N13-4 (BBR+) - Body ground Ignition switch ON Below 1 V
      N13-3 (BBR-) - Body ground Ignition switch ON Below 1 V

    4. Turn the ignition switch off.

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

    6. Using a service wire, connect terminals 17 (BBR+) and 18 (BBR-) 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
      N13-4 (BBR+) - N13-3 (BBR-) 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
      N13-4 (BBR+) - N13-3 (BBR-) Always 1 MΩ or higher
      N13-4 (BBR+) - Body ground Always 1 MΩ or higher
      N13-3 (BBR-) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FLOOR WIRE

    OK

  6. CHECK SIDE AIRBAG SENSOR ASSEMBLY RH


    1. B00288PC26
      *1 Side Airbag Sensor Assembly LH
      *2 Airbag Sensor Assembly

      Connect the connectors to the 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


      Body Electrical > SRS Airbag > Clear DTCs

    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


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Proceed to
      DTC B1638/82 is output
      DTC B1633/81 is output
      DTC B1633/81 and B1638/82 are not output

      Tech Tips

      Codes other than DTC B1633/81 and B1638/82 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.


    DTC B1638/82 is output

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH Click here

    DTC B1633/81 is output

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    DTC B1633/81 and B1638/82 are not output

    USE SIMULATION METHOD TO CHECK Click here

  7. 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 airbag sensor assembly and side airbag sensor assembly LH.

      Result
      Proceed to
      The connectors are properly connected
      The connectors are not properly connected

    The connectors are not properly connected

    CONNECT CONNECTORS PROPERLY

    The connectors are properly connected

  8. CHECK CONNECTORS


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

    2. B0027QSC31
      *1 Side Airbag Sensor Assembly LH
      *2 Airbag Sensor Assembly
      *3 Floor Wire

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

      Result
      Proceed to
      The connectors are not deformed or damaged
      The connectors are deformed or damaged

    The connectors are deformed or damaged

    REPLACE FLOOR WIRE

    The connectors are not deformed or damaged

  9. CHECK FLOOR WIRE


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

      B0027HFC13
      *1 Side Airbag Sensor Assembly LH *2 Airbag Sensor Assembly
      *3 Floor Wire *4 Connector C
      *5 Connector B *6 Service Wire
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)

      		 *b

      Rear view of wire harness connector

      (to Airbag Sensor Assembly)

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      N12-4 (BBL+) - Body ground Ignition switch ON Below 1 V
      N12-3 (BBL-) - Body ground Ignition switch ON Below 1 V

    4. Turn the ignition switch off.

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

    6. Using a service wire, connect terminals 24 (BBL+) and 23 (BBL-) 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
      N12-4 (BBL+) - N12-3 (BBL-) 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
      N12-4 (BBL+) - N12-3 (BBL-) Always 1 MΩ or higher
      N12-4 (BBL+) - Body ground Always 1 MΩ or higher
      N12-3 (BBL-) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FLOOR WIRE

    OK

  10. CHECK SIDE AIRBAG SENSOR ASSEMBLY LH


    1. B002597C49
      *1 Side Airbag Sensor Assembly RH
      *2 Airbag Sensor Assembly

      Connect the connectors to the 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


      Body Electrical > SRS Airbag > Clear DTCs

    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


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Proceed to
      DTC B1633/81 is output
      DTC B1638/82 is output
      DTC B1633/81 and B1638/82 are not output

      Tech Tips

      Codes other than DTC B1633/81 and B1638/82 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.


    DTC B1633/81 is output

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH Click here

    DTC B1638/82 is output

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    DTC B1633/81 and B1638/82 are not output

    USE SIMULATION METHOD TO CHECK Click here