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

The side airbag sensor assembly LH or RH and rear airbag sensor LH or 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 recorded when a malfunction is detected in the circuit for the side satellite sensor bus LH or RH (to determine deployment of the front and rear seat side airbag LH or RH and curtain shield airbag LH or RH).

DTC Code Detection Condition Trouble Area
B1622/81

One of the following conditions is met:


  • 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 circuit for the side satellite sensor bus RH (to determine deployment of the front and rear seat side airbag RH and curtain shield airbag RH) for 2 seconds.

  • Rear airbag sensor RH malfunction

  • Side airbag sensor assembly RH malfunction

  • Center airbag sensor assembly malfunction

  • Floor wire

  • Rear airbag sensor RH

  • Side airbag sensor assembly RH

  • Center airbag sensor assembly
B1627/82

One of the following conditions is met:


  • 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 circuit for the side satellite sensor bus LH (to determine deployment of the front and rear seat side airbag LH and curtain shield airbag LH) for 2 seconds.

  • Rear airbag sensor LH malfunction

  • Side airbag sensor assembly LH malfunction

  • Center airbag sensor assembly malfunction

  • No. 2 floor wire

  • Rear airbag sensor LH

  • Side airbag sensor assembly LH

  • Center airbag sensor assembly

WIRING DIAGRAM

A000ZFDE69
for RH Side
*a Rear Airbag Sensor RH
*b Side Airbag Sensor Assembly RH
*c Center Airbag Sensor Assembly
A000ZFDE70
for LH Side
*a Rear Airbag Sensor LH
*b Side Airbag Sensor Assembly LH
*c Center Airbag Sensor Assembly

CAUTION / NOTICE / HINT

Note


  • After turning the power switch OFF, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.

  • When disconnecting the cable from the negative (-) auxiliary 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 power switch ON (IG), and wait for at least 60 seconds.

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

    3. Turn the power switch OFF.

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

    5. 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 past DTC B1622/81 and B1627/82 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 power switch OFF.

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

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

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

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE FLOOR WIRE

    OK

  4. CHECK FLOOR WIRE (REAR AIRBAG SENSOR RH - SIDE AIRBAG SENSOR ASSEMBLY RH)

    A000WIBE02

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

    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
      R91-1 (BBR+) - Body ground Power switch ON (IG) Below 1 V
      R91-2 (BBR-) - Body ground Power switch ON (IG) Below 1 V

    4. Turn the power switch OFF.

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

    6. Using a service wire, connect terminals 2 (BBR+) and 1 (BBR-) of connector C.

      Note

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

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

      Standard resistance
      Tester Connection Condition Specified Condition
      R91-1 (BBR+) - R91-2 (BBR-) Always Below 1 Ω

    8. Disconnect the service wire from the connector C.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      R91-1 (BBR+) - R91-2 (BBR-) Always 1 MΩ or higher
      R91-1 (BBR+) - Body ground Always 1 MΩ or higher
      R91-2 (BBR-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE FLOOR WIRE

    OK

  5. CHECK REAR AIRBAG SENSOR RH

    A000TD3E43
    *1 Center Airbag Sensor Assembly
    *2 Rear Airbag Sensor LH

    1. Interchange the rear airbag sensor RH with LH and connect the connectors to them.

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

    3. Turn the power switch ON (IG), and wait for at least 60 seconds.

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

    5. Turn the power switch OFF.

    6. Turn the power switch ON (IG), and wait for at least 60 seconds.

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

    8. Turn the power switch OFF.

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

    10. Return the rear airbag sensor LH and RH to their original positions and connect the connectors to them.


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE REAR AIRBAG SENSOR RH Click here

    C

  6. CHECK SIDE AIRBAG SENSOR ASSEMBLY RH

    A000Z9YE31
    *1 Side Airbag Sensor Assembly LH
    *2 Rear Airbag Sensor RH

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

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

    3. Turn the power switch ON (IG), and wait for at least 60 seconds.

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

    5. Turn the power switch OFF.

    6. Turn the power switch ON (IG), and wait for at least 60 seconds.

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

    8. Turn the power switch OFF.

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

    10. Return the side airbag sensor assembly LH and RH 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 ASSEMBLY RH Click here

  7. CHECK CONNECTION OF CONNECTORS


    1. Turn the power switch OFF.

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

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

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  8. CHECK CONNECTORS


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

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

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  9. CHECK NO. 2 FLOOR WIRE (REAR AIRBAG SENSOR LH - SIDE AIRBAG SENSOR ASSEMBLY LH)

    A000UQ0E02

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

    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
      S98-1 (BBL+) - Body ground Power switch ON (IG) Below 1 V
      S98-2 (BBL-) - Body ground Power switch ON (IG) Below 1 V

    4. Turn the power switch OFF.

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

    6. Using a service wire, connect terminals 2 (BBL+) and 1 (BBL-) of connector C.

      Note

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

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

      Standard resistance
      Tester Connection Condition Specified Condition
      S98-1 (BBL+) - S98-2 (BBL-) Always Below 1 Ω

    8. Disconnect the service wire from the connector C.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      S98-1 (BBL+) - S98-2 (BBL-) Always 1 MΩ or higher
      S98-1 (BBL+) - Body ground Always 1 MΩ or higher
      S98-2 (BBL-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE NO. 2 FLOOR WIRE

    OK

  10. CHECK REAR AIRBAG SENSOR LH

    A000UCZE73
    *1 Rear Airbag Sensor RH
    *2 Center Airbag Sensor Assembly

    1. Interchange the rear airbag sensor LH with RH and connect the connectors to them.

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

    3. Turn the power switch ON (IG), and wait for at least 60 seconds.

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

    5. Turn the power switch OFF.

    6. Turn the power switch ON (IG), and wait for at least 60 seconds.

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

    8. Turn the power switch OFF.

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

    10. Return the rear 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 REAR AIRBAG SENSOR ASSEMBLY LH Click here

    C

  11. CHECK SIDE AIRBAG SENSOR ASSEMBLY LH

    A000Z9YE32
    *1 Side Airbag Sensor Assembly RH
    *2 Rear Airbag Sensor LH

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

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

    3. Turn the power switch ON (IG), and wait for at least 60 seconds.

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

    5. Turn the power switch OFF.

    6. Turn the power switch ON (IG), and wait for at least 60 seconds.

    7. 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

    8. Turn the power switch OFF.

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

    10. Return the rear airbag sensor LH and RH 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 ASSEMBLY LH Click here