AIRBAG SYSTEM, Diagnostic DTC:B1627/82, B1628/82, B1637/82, B1638/82, B1647/82, B1648/82

DTC Code DTC Name
B1627/82 Lost communication with Side Airbag Sensor LH
B1628/82 Side Airbag Sensor Assembly LH Initialization Incomplete
B1637/82 Lost Communication with Rear Airbag Sensor LH
B1638/82 Rear Airbag Sensor Assembly LH Initialization Incomplete
B1647/82 Lost Communication with Side Satellite Sensor Bus LH
B1648/82 Side Satellite Sensor Bus LH Initialization Incomplete

DESCRIPTION

The side collision sensor LH circuit (to determine deployment of the front seat airbag assembly LH and curtain shield airbag assembly LH) is composed of the airbag sensor assembly, side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.

The side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH detect impacts to the vehicle and send signals to the airbag sensor assembly to determine if the airbag should be deployed.

These DTCs are stored when a malfunction is detected in the side collision sensor LH circuit.

DTC No. DTC Detection Condition Trouble Area

B1627/82

B1628/82

B1637/82

B1638/82

B1647/82

B1648/82


  • The airbag sensor assembly detects a line short, short to ground or B+, or an open in the side collision sensor LH circuit.

  • Side airbag sensor assembly LH malfunction

  • No. 2 side airbag sensor assembly LH malfunction

  • Airbag sensor assembly malfunction


  • Floor wire

  • Side airbag sensor assembly LH

  • No. 2 side airbag sensor assembly LH

  • Airbag sensor assembly

WIRING DIAGRAM

B001N0NE02

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.

PROCEDURE


  1. CHECK CURRENT DTC


    1. Check for current DTCs Click here.

      Result
      Result Proceed to
      Current DTC B1647, B1648 or 82 is output. A
      Current DTC B1628 is output. B
      Current DTC B1637 or B1638 is output. C
      Current DTC B1627 is output. D
      Current DTCs B1627, B1628, B1637, B1638, B1647, B1648 and 82 are not output. E

      Tech Tips


      • DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the power switch off and then to on (IG) again.

      • Codes other than current DTCs B1627, B1628, B1637, B1638, B1647, B1648 and 82 may be output at this time, but they are not related to this check.


    B
    C
    D
    E
    A
  2. CHECK CONNECTORS


    1. Turn the power switch off.

    2. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    3. Check that the connectors are properly connected to the airbag sensor assembly, side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.

      OK
      The connectors are properly connected.

      Tech Tips

      If the connectors are not properly connected, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the airbag sensor assembly, side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.

    5. Check that the terminals of the connectors are not deformed or damaged.

      OK
      The terminals are not deformed or damaged.

    NG
    OK
  3. CHECK FLOOR WIRE (AIRBAG SENSOR ASSEMBLY - SIDE AIRBAG SENSOR ASSEMBLY LH)


    1. Connect the cable to the negative (-) auxiliary battery terminal.

      B001N02C08
      *A w/o Rear Pretensioner *B w/ Rear Pretensioner
      *1 Side Airbag Sensor Assembly LH *2 Airbag Sensor Assembly
      *3 Floor Wire *4 Service Wire
      *a

      Front view of wire harness connector

      (to Airbag Sensor Assembly)

      *b

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      P7-4 (BBL+) - Body ground Power switch on (IG) Below 1 V
      P7-3 (BBL-) - Body ground Power switch on (IG) Below 1 V
    4. Turn the power switch off.

    5. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    6. w/o Rear Pretensioner:

      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 the wire.

    7. w/ Rear Pretensioner:

      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 the wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P7-4 (BBL+) - P7-3 (BBL-) Always Below 1 Ω
    9. Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P7-4 (BBL+) - P7-3 (BBL-) Always 1 MΩ or higher
      P7-4 (BBL+) - Body ground Always 1 MΩ or higher
      P7-3 (BBL-) - Body ground Always 1 MΩ or higher

    NG
    OK
  4. CHECK FLOOR WIRE (SIDE AIRBAG SENSOR ASSEMBLY LH - NO. 2 SIDE AIRBAG SENSOR ASSEMBLY LH)


    1. B001L5YC45
      *1 No. 2 Side Airbag Sensor Assembly LH
      *2 Side Airbag Sensor Assembly LH
      *3 Floor Wire
      *4 Service Wire
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)

      *b

      Front view of wire harness connector

      (to No. 2 Side Airbag Sensor Assembly LH)

      Connect the cable to the negative (-) auxiliary battery terminal.

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      P7-1 (BCL+) - Body ground Power switch on (IG) Below 1 V
      P7-2 (BCL-) - Body ground Power switch on (IG) Below 1 V
    4. Turn the power switch off.

    5. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    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 the wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P7-1 (BCL+) - P7-2 (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
      P7-1 (BCL+) - P7-2 (BCL-) Always 1 MΩ or higher
      P7-1 (BCL+) - Body ground Always 1 MΩ or higher
      P7-2 (BCL-) - Body ground Always 1 MΩ or higher

    NG
    OK
  5. CHECK SIDE AIRBAG SENSOR ASSEMBLY LH


    1. B001KYCC01
      *A w/o Rear Pretensioner
      *B w/ Rear Pretensioner
      *1 Side Airbag Sensor Assembly RH
      *2 Airbag Sensor Assembly

      Connect the connectors to the No. 2 side airbag sensor assembly LH and airbag sensor assembly.

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

    3. Connect the cable to the negative (-) auxiliary battery terminal.

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

    5. Clear the DTCs stored in memory Click here.

    6. Turn the power switch off.

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

    8. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1647, B1648 or 82 is output. A
      DTC B1642, B1643 or 81 is output. B
      DTCs B1642, B1643, B1647, B1648, 81 and 82 are not output. C

      Tech Tips

      Codes other than DTCs B1642, B1643, B1647, B1648, 81 and 82 may be output at this time, but they are not related to this check.

    9. Turn the power switch off.

    10. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

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


    B
    C
    A
  6. CHECK NO. 2 SIDE AIRBAG SENSOR ASSEMBLY LH


    1. B001L51C02
      *1 No. 2 Side Airbag Sensor Assembly RH
      *2 Side Airbag Sensor Assembly LH

      Interchange the No. 2 side airbag sensor assembly LH with RH and connect the connectors.

    2. Connect the cable to the negative (-) auxiliary battery terminal.

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

    4. Clear the DTCs stored in 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
      DTCs B1642, B1643, B1647, B1648, 81 and 82 are not output. A
      DTC B1647, B1648 or 82 is output. B
      DTC B1642, B1643 or 81 is output. C

      Tech Tips

      Codes other than DTCs B1642, B1643, B1647, B1648, 81 and 82 may be output at this time, but they are not related to this check.

    8. Turn the power switch off.

    9. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    10. Return the No. 2 side airbag sensor assembly LH and RH to their original positions and connect the connectors.


    A
    B
    C
  7. CHECK HISTORY DTC


    1. Check for history DTCs Click here.

      Result
      Result Proceed to
      History DTC B1627 is not output. A
      History DTC B1627 is output. B

      Tech Tips

      Codes other than history DTC B1627 may be output at this time, but they are not related to this check.


    B
    A
  8. CHECK CONNECTORS


    1. Turn the power switch off.

    2. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    3. Check that the connectors are properly connected to the airbag sensor assembly, side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.

      OK
      The connectors are properly connected.

      Tech Tips

      If the connectors are not properly connected, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the airbag sensor assembly, side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.

    5. Check that the terminals of the connectors are not deformed or damaged.

      OK
      The terminals are not deformed or damaged.

    NG
    OK
  9. CHECK FLOOR WIRE (AIRBAG SENSOR ASSEMBLY - SIDE AIRBAG SENSOR ASSEMBLY LH)


    1. Connect the cable to the negative (-) auxiliary battery terminal.

      B001N02C08
      *A w/o Rear Pretensioner *B w/ Rear Pretensioner
      *1 Side Airbag Sensor Assembly LH *2 Airbag Sensor Assembly
      *3 Floor Wire *4 Service Wire
      *a

      Front view of wire harness connector

      (to Airbag Sensor Assembly)

      *b

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      P7-4 (BBL+) - Body ground Power switch on (IG) Below 1 V
      P7-3 (BBL-) - Body ground Power switch on (IG) Below 1 V
    4. Turn the power switch off.

    5. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    6. w/o Rear Pretensioner:

      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 the wire.

    7. w/ Rear Pretensioner:

      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 the wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P7-4 (BBL+) - P7-3 (BBL-) Always Below 1 Ω
    9. Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P7-4 (BBL+) - P7-3 (BBL-) Always 1 MΩ or higher
      P7-4 (BBL+) - Body ground Always 1 MΩ or higher
      P7-3 (BBL-) - Body ground Always 1 MΩ or higher

    NG
    OK
  10. CHECK FLOOR WIRE (SIDE AIRBAG SENSOR ASSEMBLY LH - NO. 2 SIDE AIRBAG SENSOR ASSEMBLY LH)


    1. B001L5YC45
      *1 No. 2 Side Airbag Sensor Assembly LH
      *2 Side Airbag Sensor Assembly LH
      *3 Floor Wire
      *4 Service Wire
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)

      *b

      Front view of wire harness connector

      (to No. 2 Side Airbag Sensor Assembly LH)

      Connect the cable to the negative (-) auxiliary battery terminal.

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      P7-1 (BCL+) - Body ground Power switch on (IG) Below 1 V
      P7-2 (BCL-) - Body ground Power switch on (IG) Below 1 V
    4. Turn the power switch off.

    5. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    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 the wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P7-1 (BCL+) - P7-2 (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
      P7-1 (BCL+) - P7-2 (BCL-) Always 1 MΩ or higher
      P7-1 (BCL+) - Body ground Always 1 MΩ or higher
      P7-2 (BCL-) - Body ground Always 1 MΩ or higher

    NG
    OK
  11. CHECK SIDE AIRBAG SENSOR ASSEMBLY LH


    1. B001KYCC01
      *A w/o Rear Pretensioner
      *B w/ Rear Pretensioner
      *1 Side Airbag Sensor Assembly RH
      *2 Airbag Sensor Assembly

      Connect the connectors to the No. 2 side airbag sensor assembly LH and airbag sensor assembly.

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

    3. Connect the cable to the negative (-) auxiliary battery terminal.

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

    5. Clear the DTCs stored in memory Click here.

    6. Turn the power switch off.

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

    8. Check for DTCs Click here.

      Result
      Result Proceed to
      DTCs B1623 and B1628 are not output. A
      DTC B1628 is output. B
      DTC B1623 is output. C

      Tech Tips

      Codes other than DTCs B1623 and B1628 may be output at this time, but they are not related to this check.

    9. Turn the power switch off.

    10. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

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


    A
    B
    C
  12. CHECK CONNECTORS


    1. Turn the power switch off.

    2. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    3. Check that the connectors are properly connected to the side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.

      OK
      The connectors are properly connected.

      Tech Tips

      If the connectors are not properly connected, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.

    5. Check that the terminals of the connectors are not deformed or damaged.

      OK
      The terminals are not deformed or damaged.

    NG
    OK
  13. CHECK FLOOR WIRE (SIDE AIRBAG SENSOR ASSEMBLY LH - NO. 2 SIDE AIRBAG SENSOR ASSEMBLY LH)


    1. B001L5YC45
      *1 No. 2 Side Airbag Sensor Assembly LH
      *2 Side Airbag Sensor Assembly LH
      *3 Floor Wire
      *4 Service Wire
      *a

      Front view of wire harness connector

      (to Side Airbag Sensor Assembly LH)

      *b

      Front view of wire harness connector

      (to No. 2 Side Airbag Sensor Assembly LH)

      Connect the cable to the negative (-) auxiliary battery terminal.

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      P7-1 (BCL+) - Body ground Power switch on (IG) Below 1 V
      P7-2 (BCL-) - Body ground Power switch on (IG) Below 1 V
    4. Turn the power switch off.

    5. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    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 the wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P7-1 (BCL+) - P7-2 (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
      P7-1 (BCL+) - P7-2 (BCL-) Always 1 MΩ or higher
      P7-1 (BCL+) - Body ground Always 1 MΩ or higher
      P7-2 (BCL-) - Body ground Always 1 MΩ or higher

    NG
    OK
  14. CHECK SIDE AIRBAG SENSOR ASSEMBLY LH


    1. B001KYCC01
      *A w/o Rear Pretensioner
      *B w/ Rear Pretensioner
      *1 Side Airbag Sensor Assembly RH
      *2 Airbag Sensor Assembly

      Connect the connector to the No. 2 side airbag sensor assembly LH.

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

    3. Connect the cable to the negative (-) auxiliary battery terminal.

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

    5. Clear the DTCs stored in memory Click here.

    6. Turn the power switch off.

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

    8. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1637 or B1638 is output. A
      DTC B1632 or B1633 is output. B
      DTCs B1632, B1633, B1637 and B1638 are not output. C

      Tech Tips

      Codes other than DTCs B1632, B1633, B1637 and B1638 may be output at this time, but they are not related to this check.

    9. Turn the power switch off.

    10. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

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


    B
    C
    A
  15. CHECK NO. 2 SIDE AIRBAG SENSOR ASSEMBLY LH


    1. B001L51C02
      *1 No. 2 Side Airbag Sensor Assembly RH
      *2 Side Airbag Sensor Assembly LH

      Interchange the No. 2 side airbag sensor assembly LH with RH and connect the connectors.

    2. Connect the cable to the negative (-) auxiliary battery terminal.

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

    4. Clear the DTCs stored in 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
      DTCs B1632, B1633, B1637 and B1638 are not output. A
      DTC B1637 or B1638 is output. B
      DTC B1632 or B1633 is output. C

      Tech Tips

      Codes other than DTCs B1632, B1633, B1637 and B1638 may be output at this time, but they are not related to this check.

    8. Turn the power switch off.

    9. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    10. Return the No. 2 side airbag sensor assembly LH and RH to their original positions and connect the connectors.


    A
    B
    C
  16. CHECK SIDE AIRBAG SENSOR ASSEMBLY LH


    1. B001KYCC01
      *A w/o Rear Pretensioner
      *B w/ Rear Pretensioner
      *1 Side Airbag Sensor Assembly RH
      *2 Airbag Sensor Assembly

      Turn the power switch off.

    2. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    3. Interchange the side airbag sensor assembly LH with RH and connect the connectors.

    4. Connect the cable to the negative (-) auxiliary battery terminal.

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

    6. Clear the DTCs stored in memory Click here.

    7. Turn the power switch off.

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

    9. Check for DTCs Click here.

      Result
      Result Proceed to
      DTCs B1622 and B1627 are not output. A
      DTC B1627 is output. B
      DTC B1622 is output. C

      Tech Tips

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

    10. Turn the power switch off.

    11. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

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


    A
    B
    C