AIRBAG SYSTEM, Diagnostic DTC:B1632/81, B1633/81, B1697/82, B1698/82

DTC Code DTC Name
B1632/81 Lost Communication with Rear Airbag Sensor RH
B1633/81 Rear Airbag Sensor Assembly RH Initialization Incomplete
B1697/82 Lost Communication with Door Side Airbag Sensor LH
B1698/82 Door Side Airbag Sensor LH Initialization Incomplete

DESCRIPTION

Tech Tips

"Door side airbag sensor LH" refers to the side airbag sensor LH.


DTC Code DTC Detection Condition Trouble Area
B1632/81

When one of the following conditions is met:


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

  • A side airbag sensor RH malfunction.

  • A rear airbag sensor RH malfunction.

  • A center airbag sensor malfunction.

  • No. 2 floor wire

  • Front door wire RH

  • Side airbag sensor RH

  • Rear airbag sensor RH

  • Center airbag sensor assembly
B1633/81

When one of the following conditions is met:


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

  • A side airbag sensor RH malfunction.

  • A rear airbag sensor RH malfunction.

  • A center airbag sensor malfunction.

  • No. 2 floor wire

  • Front door wire RH

  • Side airbag sensor RH

  • Rear airbag sensor RH

  • Center airbag sensor assembly
B1697/82

When one of the following conditions is met:


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

  • A side airbag sensor LH malfunction.

  • A rear airbag sensor LH malfunction.

  • A center airbag sensor malfunction.

  • Floor wire

  • Front door wire LH

  • Side airbag sensor LH

  • Rear airbag sensor LH

  • Center airbag sensor assembly
B1698/82

When one of the following conditions is met:


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

  • A side airbag sensor LH malfunction.

  • A rear airbag sensor LH malfunction.

  • A center airbag sensor malfunction.

  • Floor wire

  • Front door wire LH

  • Side airbag sensor LH

  • Rear airbag sensor LH

  • Center airbag sensor assembly

WIRING DIAGRAM

B001A1HE05
for RH Side
*a Side Airbag Sensor RH
*b Rear Airbag Sensor RH
*c Center Airbag Sensor
B001AHYE36
for LH Side
*a Rear Airbag Sensor LH
*b Side Airbag Sensor LH
*c Center Airbag Sensor

CAUTION / NOTICE / HINT

Note


  • After turning the engine 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 center airbag sensor assembly, refer to initialization Click here.

PROCEDURE


  1. CHECK FOR DTC


    1. Turn the engine switch on (IG).

    2. Clear the DTCs stored in the memory Click here.

    3. Turn the engine switch off.

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

    5. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1632, B1633, B1697 and B1698 are not output A
      DTC B1697 or B1698 is output B
      DTC B1632 or B1633 is output C

      Tech Tips

      Codes other than DTC B1632, B1633, B1697 and B1698 may be output at this time, but they are not related to this check.


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    CHECK CONNECTION OF CONNECTORS Click here

    C

  2. CHECK CONNECTION OF CONNECTORS


    1. Turn the engine 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, the side airbag sensor RH and rear airbag sensor RH.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  3. CHECK CONNECTORS


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

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

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE HARNESS AND CONNECTOR

    OK

  4. CHECK SIDE AIRBAG SENSOR RH

    B0019Z3E09
    *1 Center Airbag Sensor
    *2 Side Airbag Sensor LH

    1. Connect the connectors to the center airbag sensor.

    2. Interchange the side 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 engine switch on (IG), and wait for at least 60 seconds.

    5. Clear the DTCs stored in the memory Click here.

    6. Turn the engine switch off.

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

    8. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1632, B1633, B1697 and B1698 are not output A
      DTC B1697 or B1698 is output B
      DTC B1632 or B1633 is output C

      Tech Tips

      Codes other than DTC B1632, B1633, B1697 and B1698 may be output at this time, but they are not related to this check.

    9. Turn the engine switch off.

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

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


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE SIDE AIRBAG SENSOR RH Click here

    C

  5. CHECK REAR AIRBAG SENSOR RH CIRCUIT

    B001AJ0E01

    1. Disconnect the connectors from the side airbag sensor RH and 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
      I39-1 (BCR+) - Body ground Engine switch on (IG) Below 1 V
      I39-2 (BCR-) - Body ground Engine switch on (IG) Below 1 V

    4. Turn the engine 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 E.

      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
      I39-1 (BCR+) - I39-2 (BCR-) Always Below 1 Ω

    8. Disconnect the service wire from connector E.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I39-1 (BCR+) - I39-2 (BCR-) Always 1 MΩ or higher
      I39-1 (BCR+) - Body ground Always 1 MΩ or higher
      I39-2 (BCR-) - Body ground Always 1 MΩ or higher

    NG

    CHECK FRONT DOOR WIRE RH (SIDE AIRBAG SENSOR RH - NO. 2 FLOOR WIRE) Click here

    OK

  6. CHECK REAR AIRBAG SENSOR RH

    B00195UE35
    *1 Rear Airbag Sensor RH
    *2 Side Airbag Sensor RH

    1. Connect the connectors to the side airbag sensor RH.

    2. Temporarily replace the rear airbag sensor RH with a new one.

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

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

    5. Clear the DTCs stored in the memory Click here.

    6. Turn the engine switch off.

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

    8. Check for DTCs Click here.

      OK
      DTC B1632 and B1633 is not output.

      Tech Tips

      Codes other than DTC B1632 and B1633 may be output at this time, but they are not related to this check.


    OK

    REPLACE REAR AIRBAG SENSOR RH Click here

    NG

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

  7. CHECK FRONT DOOR WIRE RH (SIDE AIRBAG SENSOR RH - NO. 2 FLOOR WIRE)

    B00197RE02

    1. Disconnect the front door wire RH connectors from the No. 2 floor wire.

    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
      I39-1 (BCR+) - Body ground Engine switch on (IG) Below 1 V
      I39-2 (BCR-) - Body ground Engine switch on (IG) Below 1 V

    4. Turn the engine 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 C.

      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
      I39-1 (BCR+) - I39-2 (BCR-) Always Below 1 Ω

    8. Disconnect the service wire from connector C.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I39-1 (BCR+) - I39-2 (BCR-) Always 1 MΩ or higher
      I39-1 (BCR+) - Body ground Always 1 MΩ or higher
      I39-2 (BCR-) - Body ground Always 1 MΩ or higher

    OK

    REPLACE NO. 2 FLOOR WIRE

    NG

    REPLACE FRONT DOOR WIRE RH

  8. CHECK CONNECTION OF CONNECTORS


    1. Turn the engine 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, the side airbag sensor LH and rear airbag sensor LH.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  9. CHECK CONNECTORS


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

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

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE HARNESS AND CONNECTOR

    OK

  10. CHECK REAR AIRBAG SENSOR LH

    B0018Y6E21
    *1 Center Airbag Sensor
    *2 Rear Airbag Sensor LH

    1. Connect the connector to the center airbag sensor.

    2. Temporarily replace the rear airbag sensor LH with a new one.

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

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

    5. Clear the DTCs stored in the memory Click here.

    6. Turn the engine switch off.

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

    8. Check for DTCs Click here.

      OK
      DTC B1697 and B1698 are not output.

      Tech Tips

      Codes other than DTC B1697 and B1698 may be output at this time, but they are not related to this check.


    OK

    REPLACE REAR AIRBAG SENSOR LH Click here

    NG

  11. CHECK SIDE AIRBAG SENSOR LH CIRCUIT

    B001AX8E01

    1. Turn the engine switch off.

    2. Disconnect the connectors from the side airbag sensor LH and rear airbag sensor LH.

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

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

      Standard Voltage
      Tester Connection Switch Condition Specified condition
      K7-1 (BCL+) - Body ground Engine switch on (IG) Below 1 V
      K7-2 (BCL-) - Body ground Engine switch on (IG) Below 1 V

    5. Turn the engine switch off.

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

    7. Using a service wire, connect terminals 2 (BCL+) and 1 (BCL-) of connector E.

      Note

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K7-1 (BCL+) - K7-2 (BCL-) Always Below 1 Ω

    9. Disconnect the service wire from connector E.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K7-1 (BCL+) - Body ground Always 1 MΩ or higher
      K7-2 (BCL-) - Body ground Always 1 MΩ or higher

    NG

    CHECK FLOOR WIRE (SIDE AIRBAG SENSOR LH - FRONT DOOR WIRE LH) Click here

    OK

  12. CHECK SIDE AIRBAG SENSOR LH

    B00195UE09
    *1 Side Airbag Sensor RH
    *2 Rear Airbag Sensor LH

    1. Connect the connectors to the rear airbag sensor LH.

    2. Interchange the side 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 engine switch on (IG), and wait for at least 60 seconds.

    5. Clear the DTCs stored in the memory Click here.

    6. Turn the engine switch off.

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

    8. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1632, B1633, B1697 and B1698 are not output A
      DTC B1632 or B1633 is output B
      DTC B1697 or B1698 is output C

    9. Turn the engine switch off.

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

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


    C

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE SIDE AIRBAG SENSOR LH Click here

  13. CHECK FLOOR WIRE (SIDE AIRBAG SENSOR LH - FRONT DOOR WIRE LH)

    B0018J9E03

    1. Disconnect the floor wire connector from the front door wire 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 Condition
      K7-1 (BCL+) - Body ground Engine switch on (IG) Below 1 V
      K7-2 (BCL-) - Body ground Engine switch on (IG) Below 1 V

    4. Turn the engine 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 C.

      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
      K7-1 (BCL+) - K7-2 (BCL-) Always Below 1 Ω

    8. Disconnect the service wire from connector C.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K7-1 (BCL+) - Body ground Always 1 MΩ or higher
      K7-2 (BCL-) - Body ground Always 1 MΩ or higher

    OK

    REPLACE FRONT DOOR WIRE LH

    NG

    REPLACE FLOOR WIRE