AIRBAG SYSTEM, Diagnostic DTC:B1632/81, B1633/81, B1637/82, B1638/82

DTC Code DTC Name
B1632/81 Lost Communication with Rear Airbag Sensor RH
B1633/81 Rear Airbag Sensor Assembly RH Initialization Incomplete
B1637/82 Lost Communication with Rear Airbag Sensor LH
B1638/82 Rear Airbag Sensor Assembly LH Initialization Incomplete

DESCRIPTION

The circuit for the side collision sensor LH/RH (to determine deployment of the front seat side airbag assembly LH/RH and curtain shield airbag assembly LH/RH) is composed of the center airbag sensor assembly, rear airbag sensor LH/RH and side airbag sensor assembly LH/RH.

The rear airbag sensor LH/RH and 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 B1632/81 or B1637/82 is stored when a malfunction is detected in the circuit for the side collision sensor LH/RH (to determine deployment of the front seat side airbag assembly LH/RH and curtain shield airbag assembly LH/RH).

DTC Code DTC Detection Condition Trouble Area

B1632/81

B1633/81

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 collision sensor RH (to determine deployment of the front seat side airbag assembly RH and curtain shield airbag assembly RH) for 2 seconds.

  • A side airbag sensor assembly RH malfunction.

  • A rear airbag sensor RH malfunction.

  • A center airbag sensor assembly malfunction.

  • No. 2 floor wire

  • Front door wire RH

  • Side airbag sensor assembly RH

  • Rear airbag sensor RH

  • Center airbag sensor assembly

B1637/82

B1638/82

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 collision sensor LH (to determine deployment of the front seat side airbag assembly LH and curtain shield airbag assembly LH) for 2 seconds.

  • A side airbag sensor assembly LH malfunction.

  • A rear airbag sensor LH malfunction.

  • A center airbag sensor assembly malfunction.

  • Floor wire

  • Front door wire LH

  • Side airbag sensor assembly LH

  • Rear airbag sensor LH

  • Center airbag sensor assembly

WIRING DIAGRAM

A00ON0CE07
A00ON0CE08

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 side 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 B1632/81 or B1633/81 is output A
      DTC B1637/82 or B1638/82 is output B
      DTC B1632/81, B1633/81, B1637/82, B1638/82 are not output C

      Tech Tips

      Codes other than DTC B1632/81, B1633/81, B1637/82 and B1638/82 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, side airbag sensor assembly RH and rear airbag sensor RH.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  3. CHECK CONNECTORS


    1. A00OM2ME01
      Text in Illustration
      *1 Side Airbag Sensor Assembly RH
      *2 Rear Airbag Sensor RH
      *3 Center Airbag Sensor Assembly

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

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

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  4. CHECK SIDE AIRBAG SENSOR ASSEMBLY RH


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

      Connect the connectors to the center airbag sensor assembly and side airbag sensor assembly RH.

    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 B1632/81 or B1633/81 is output A
      DTC B1637/82 or B1638/82 is output B
      DTC B1632/81, B1633/81, B1637/82 and B1638/82 are not output C

      Tech Tips

      Codes other than DTC B1632/81, B1633/81, B1637/82 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.


    B

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  5. CHECK NO. 2 FLOOR WIRE


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

      A00OIN2E01
      Text in Illustration
      *1 Side Airbag Sensor Assembly RH *2 Rear Airbag Sensor RH
      *3 No. 2 Floor Wire *4 Connector C
      *5 Connector B - Service Wire
      *a

      Rear view of wire harness connector

      (to Side Airbag Sensor Assembly RH)

      		 *b

      Rear view of wire harness connector

      (to Rear Airbag Sensor RH)

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

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      H6-1 (BCR+) - Body ground Ignition switch ON Below 1 V
      H6-2 (BCR-) - 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 2 (BCR+) and 1 (BCR-) 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
      H6-1 (BCR+) - H6-2 (BCR-) 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
      H6-1 (BCR+) - H6-2 (BCR-) Always 1 MΩ or higher
      H6-1 (BCR+) - Body ground Always 1 MΩ or higher
      H6-2 (BCR-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  6. CHECK REAR AIRBAG SENSOR RH


    1. A00OHY2E01
      Text in Illustration
      *1 Side Airbag Sensor Assembly RH
      *2 Rear Airbag Sensor LH

      Connect the connector to the side airbag sensor assembly RH.

    2. Interchange the rear airbag sensor 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 B1632/81 or B1633/81 is output A
      DTC B1637/82 or B1638/82 is output (for Sedan) B
      DTC B1637/82 or B1638/82 is output (for Wagon) C
      DTC B1632/81, B1633/81, B1637/82 and B1638/82 are not output D

      Tech Tips

      Codes other than DTC B1632/81, B1633/81, B1637/82 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 rear airbag sensor LH and RH to their original positions and connect the connectors to them.


    B

    REPLACE REAR AIRBAG SENSOR RH Click here

    C

    REPLACE REAR AIRBAG SENSOR RH Click here

    D

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    A

    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 center airbag sensor assembly, rear airbag sensor LH and side airbag sensor LH.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  8. CHECK CONNECTORS


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

    2. A00OKVPE01
      Text in Illustration
      *1 Side Airbag Sensor Assembly LH
      *2 Rear Airbag Sensor LH
      *3 Center Airbag Sensor Assembly

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

      OK
      The connectors are not deformed or damaged.

    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 and side airbag sensor assembly LH.

    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 B1637/82 or B1638/82 is output A
      DTC B1632/8or B1633/81 is output B
      DTC B1632/81, B1633/81, B1637/82 and B1638/82 are not output C

      Tech Tips

      Codes other than DTC B1632/81, B1633/81, B1637/82 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.


    B

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  10. CHECK FLOOR WIRE


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

      A00OIN2E02
      Text in Illustration
      *1 Side Airbag Sensor Assembly LH *2 Rear Airbag Sensor LH
      *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 Rear Airbag Sensor LH)

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

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

      Standard Voltage
      Tester Connection Switch Condition Specified G8Condition
      G8-1 (BCL+) - Body ground Ignition switch ON Below 1 V
      G8-2 (BCL-) - 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 2 (BCL+) and 1 (BCL-) 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
      G8-1 (BCL+) - G8-2 (BCL-) 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
      G8-1 (BCL+) - G8-2 (BCL-) Always 1 MΩ or higher
      G8-1 (BCL+) - Body ground Always 1 MΩ or higher
      G8-2 (BCL-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE FLOOR WIRE

    OK

  11. CHECK REAR AIRBAG SENSOR LH


    1. A00OHY2E01
      Text in Illustration
      *1 Side Airbag Sensor Assembly LH
      *2 Rear Airbag Sensor RH

      Connect the connector to the side airbag sensor assembly LH.

    2. Interchange the rear airbag sensor 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 B1637/82 or B1638/82 is output A
      DTC B1632/81 or B1633/81 is output (for Sedan) B
      DTC B1632/81 or B1633/81 is output (for Wagon) C
      DTC B1632/81, B1633/81, B1637/82 and B1638/82 are not output D

      Tech Tips

      Codes other than DTC B1632/81, B1633/81, B1637/82 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 rear airbag sensor RH and LH to their original positions and connect the connectors to them.


    B

    REPLACE REAR AIRBAG SENSOR LH Click here

    C

    REPLACE REAR AIRBAG SENSOR LH Click here

    D

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here