AIRBAG SYSTEM, Diagnostic DTC:B1637/82, B1638/82, B1647/82, B1697/82, B1698/82

DTC Code DTC Name
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
B1697/82 Lost Communication with Door Side Airbag Sensor LH
B1698/82 Door Side Airbag Sensor LH Initialization Incomplete

DESCRIPTION

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

The rear airbag sensor LH and side airbag sensor LH detect impacts to the vehicle and send signals to the center airbag sensor assembly to determine if the airbag should be deployed.

These DTCs are stored when a malfunction is detected for the side collision sensor LH circuit (to determine deployment of the front seat side airbag assembly LH and curtain shield airbag assembly LH).

DTC No. DTC Detection Condition Trouble Area

B1637/82

B1638/82

B1647/82

B1697/82

B1698/82

  • 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 side collision sensor LH circuit (to determine deployment of the front seat side airbag assembly LH and curtain shield airbag assembly LH).

  • Rear airbag sensor LH malfunction

  • Side airbag sensor LH malfunction

  • Center airbag sensor assembly malfunction

  • Floor wire

  • Front door wire LH

  • Rear airbag sensor LH

  • Side airbag sensor LH

  • Center airbag sensor assembly

WIRING DIAGRAM

A01EMGXE07

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK CURRENT DTC


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

    2. Check for current DTCs Click here.

      Result
      Result Proceed to
      Current DTC B1638 is output. A
      Current DTC B1647 or 82 is output. B
      Current DTC B1697 or B1698 is output. C
      Current DTC B1637 is output. D
      Current DTC B1637, B1638, B1647, B1697, B1698 or 82 is not output. E

      Tech Tips


      • DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the ignition switch off and then to ON again.

      • Codes other than current DTCs B1637, B1638, B1647, B1697, B1698 and 82 may be output at this time, but they are not related to this check.


    B

    CHECK CONNECTORS Click here

    C

    CHECK CONNECTORS Click here

    D

    CHECK REAR AIRBAG SENSOR LH Click here

    E

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK HISTORY DTC


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

    2. Check for history DTCs Click here.

      Result
      Result Proceed to
      History DTC B1637 is not output. A
      History DTC B1637 is output. B

      Tech Tips

      Codes other than history DTC B1637 may be output at this time, but they are not related to this check.


    B

    CHECK REAR AIRBAG SENSOR LH Click here

    A

  3. CHECK 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. Also check that the connectors that link the floor wire and front door wire LH are properly connected.

      OK
      The connectors are properly connected.

      Tech Tips

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

    4. Disconnect the connectors from the center airbag sensor assembly, rear airbag sensor LH and side airbag sensor LH. Also disconnect the connectors that link the floor wire and front door wire LH.

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

      OK
      The terminals are not deformed or damaged.

    NG

    REPLACE WIRE HARNESS

    OK

  4. CHECK FLOOR WIRE (OPEN)


    1. Using SST, connect terminals 24 (BBL+) and 23 (BBL-) of connector B.

      A01EJK0E05

      Note

      Do not forcibly insert SST into the terminals of the connector when connecting.

      SST
      09843-18040

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L3-4 (BCL+) - L3-3 (BCL-) Always Below 1 Ω
      Text in Illustration
      *1 Rear Airbag Sensor LH *2 Center Airbag Sensor Assembly
      *3 Floor Wire *4

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)
      *5

      Front view of wire harness connector

      (to Rear Airbag Sensor LH)

      		 *6 Connector B
      *7 Connector C - -

    NG

    REPLACE FLOOR WIRE

    OK

  5. CHECK FLOOR WIRE (SHORT)


    1. A01EJTUE16
      Text in Illustration
      *1 Rear Airbag Sensor LH
      *2 Center Airbag Sensor Assembly
      *3 Floor Wire
      *4

      Front view of wire harness connector

      (to Rear Airbag Sensor LH)
      *5 Connector C

      Disconnect SST from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L3-4 (BCL+) - L3-3 (BCL-) Always 1 MΩ or higher

    NG

    REPLACE FLOOR WIRE

    OK

  6. CHECK FLOOR WIRE (SHORT TO B+)


    1. A01EJTUE16
      Text in Illustration
      *1 Rear Airbag Sensor LH
      *2 Center Airbag Sensor Assembly
      *3 Floor Wire
      *4

      Front view of wire harness connector

      (to Rear Airbag Sensor LH)
      *5 Connector C

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

    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
      L3-4 (BCL+) - Body ground Ignition switch ON Below 1 V
      L3-3 (BCL-) - Body ground Ignition switch ON Below 1 V

    NG

    REPLACE FLOOR WIRE

    OK

  7. CHECK FLOOR WIRE (SHORT TO GROUND)


    1. A01EJTUE16
      Text in Illustration
      *1 Rear Airbag Sensor LH
      *2 Center Airbag Sensor Assembly
      *3 Floor Wire
      *4

      Front view of wire harness connector

      (to Rear Airbag Sensor LH)
      *5 Connector C

      Turn the ignition switch off.

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L3-4 (BCL+) - Body ground Always 1 MΩ or higher
      L3-3 (BCL-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE FLOOR WIRE

    OK

  8. CHECK WIRE HARNESS (OPEN)


    1. Connect the connectors that link the floor wire and front door wire LH.

      A01EKY2E07

    2. Using SST, connect terminals 2 (BDL+) and 1 (BDL-) of connector E.

      Note

      Do not forcibly insert SST into the terminals of the connector when connecting.

      SST
      09843-18040

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L3-1 (BDL+) - L3-2 (BDL-) Always Below 1 Ω
      Text in Illustration
      *1 Side Airbag Sensor LH *2 Rear Airbag Sensor LH
      *3

      Front view of wire harness connector

      (to Rear Airbag Sensor LH)

      		 *4

      Front view of wire harness connector

      (to Side Airbag Sensor LH)
      *5 Connector B *6 Connector E

    NG

    CHECK FRONT DOOR WIRE LH (OPEN) Click here

    OK

  9. CHECK WIRE HARNESS (SHORT)


    1. A01EM18E25
      Text in Illustration
      *1 Side Airbag Sensor LH
      *2 Rear Airbag Sensor LH
      *3

      Front view of wire harness connector

      (to Rear Airbag Sensor LH)
      *4 Connector B

      Disconnect SST from connector E.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L3-1 (BDL+) - L3-2 (BDL-) Always 1 MΩ or higher

    NG

    CHECK FRONT DOOR WIRE LH (SHORT) Click here

    OK

  10. CHECK WIRE HARNESS (SHORT TO B+)


    1. A01EM18E25
      Text in Illustration
      *1 Side Airbag Sensor LH
      *2 Rear Airbag Sensor LH
      *3

      Front view of wire harness connector

      (to Rear Airbag Sensor LH)
      *4 Connector B

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

    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
      L3-1 (BDL+) - Body ground Ignition switch ON Below 1 V
      L3-2 (BDL-) - Body ground Ignition switch ON Below 1 V

    NG

    CHECK FRONT DOOR WIRE LH (SHORT TO B+) Click here

    OK

  11. CHECK WIRE HARNESS (SHORT TO GROUND)


    1. A01EM18E25
      Text in Illustration
      *1 Side Airbag Sensor LH
      *2 Rear Airbag Sensor LH
      *3

      Front view of wire harness connector

      (to Rear Airbag Sensor LH)
      *4 Connector B

      Turn the ignition switch off.

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L3-1 (BDL+) - Body ground Always 1 MΩ or higher
      L3-2 (BDL-) - Body ground Always 1 MΩ or higher

    NG

    CHECK FRONT DOOR WIRE LH (SHORT TO GROUND) Click here

    OK

  12. CHECK REAR AIRBAG SENSOR LH


    1. A01EJAEE01
      Text in Illustration
      *1 Rear Airbag Sensor RH
      *2 Center Airbag Sensor Assembly

      Turn the ignition switch off.

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

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

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

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

    6. Clear the DTCs stored in memory Click here.

    7. Turn the ignition switch off.

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

    9. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1638, B1647 or 82 is output. A
      DTC B1633, B1642 or 81 is output. B
      DTCs B1633, B1642 or 81 and B1638, B1647 or 82 are not output. C

      Tech Tips

      Codes other than DTCs B1633, B1642 or 81 and B1638, B1647 or 82 may be output at this time, but they are not related to this check.


    B

    REPLACE REAR AIRBAG SENSOR LH Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  13. CHECK SIDE AIRBAG SENSOR LH


    1. A01ELMTE06
      Text in Illustration
      *1 Side Airbag Sensor RH
      *2 Rear Airbag Sensor LH

      Turn the ignition switch off.

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

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

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

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

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

    7. Clear the DTCs stored in memory Click here.

    8. Turn the ignition switch off.

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

    10. Check for DTCs Click here.

      Result
      Result Proceed to
      DTCs B1633, B1642 or 81 and B1638, B1647 or 82 are not output. A
      DTC B1633, B1642 or 81 is output. B
      DTC B1638, B1647 or 82 is output. C

      Tech Tips

      Codes other than DTCs B1633, B1642 or 81 and B1638, B1647 or 82 may be output at this time, but they are not related to this check.


    B

    REPLACE SIDE AIRBAG SENSOR LH Click here

    C

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  14. CHECK 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 rear airbag sensor LH and side airbag sensor LH. Also check that the connectors that link the floor wire and front door wire LH are properly connected.

      OK
      The connectors are properly connected.

      Tech Tips

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

    4. Disconnect the connectors from the rear airbag sensor LH and side airbag sensor LH. Also disconnect the connectors that link the floor wire and front door wire LH.

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

      OK
      The terminals are not deformed or damaged.

    NG

    REPLACE WIRE HARNESS

    OK

  15. CHECK WIRE HARNESS (OPEN)


    1. Connect the connectors that link the floor wire and front door wire LH.

      A01EKY2E07

    2. Using SST, connect terminals 2 (BDL+) and 1 (BDL-) of connector E.

      Note

      Do not forcibly insert SST into the terminals of the connector when connecting.

      SST
      09843-18040

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L3-1 (BDL+) - L3-2 (BDL-) Always Below 1 Ω
      Text in Illustration
      *1 Side Airbag Sensor LH *2 Rear Airbag Sensor LH
      *3

      Front view of wire harness connector

      (to Rear Airbag Sensor LH)

      		 *4

      Front view of wire harness connector

      (to Side Airbag Sensor LH)
      *5 Connector B *6 Connector E

    NG

    CHECK FRONT DOOR WIRE LH (OPEN) Click here

    OK

  16. CHECK WIRE HARNESS (SHORT)


    1. A01EM18E25
      Text in Illustration
      *1 Side Airbag Sensor LH
      *2 Rear Airbag Sensor LH
      *3

      Front view of wire harness connector

      (to Rear Airbag Sensor LH)
      *4 Connector B

      Disconnect SST from connector E.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L3-1 (BDL+) - L3-2 (BDL-) Always 1 MΩ or higher

    NG

    CHECK FRONT DOOR WIRE LH (SHORT) Click here

    OK

  17. CHECK WIRE HARNESS (SHORT TO B+)


    1. A01EM18E25
      Text in Illustration
      *1 Side Airbag Sensor LH
      *2 Rear Airbag Sensor LH
      *3

      Front view of wire harness connector

      (to Rear Airbag Sensor LH)
      *4 Connector B

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

    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
      L3-1 (BDL+) - Body ground Ignition switch ON Below 1 V
      L3-2 (BDL-) - Body ground Ignition switch ON Below 1 V

    NG

    CHECK FRONT DOOR WIRE LH (SHORT TO B+) Click here

    OK

  18. CHECK WIRE HARNESS (SHORT TO GROUND)


    1. A01EM18E25
      Text in Illustration
      *1 Side Airbag Sensor LH
      *2 Rear Airbag Sensor LH
      *3

      Front view of wire harness connector

      (to Rear Airbag Sensor LH)
      *4 Connector B

      Turn the ignition switch off.

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L3-1 (BDL+) - Body ground Always 1 MΩ or higher
      L3-2 (BDL-) - Body ground Always 1 MΩ or higher

    NG

    CHECK FRONT DOOR WIRE LH (SHORT TO GROUND) Click here

    OK

  19. CHECK SIDE AIRBAG SENSOR LH


    1. A01ELMTE06
      Text in Illustration
      *1 Side Airbag Sensor RH
      *2 Rear Airbag Sensor LH

      Connect the connectors to the rear airbag sensor LH.

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

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

    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 B1697 or B1698 is output. A
      DTC B1692 or B1693 is output. B
      DTCs B1692, B1693, B1697 and B1698 are not output. C

      Tech Tips

      Codes other than DTCs B1692, B1693, B1697 and B1698 may be output at this time, but they are not related to this check.


    B

    REPLACE SIDE AIRBAG SENSOR LH Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  20. CHECK REAR AIRBAG SENSOR LH


    1. A01EJAEE01
      Text in Illustration
      *1 Rear Airbag Sensor RH
      *2 Center Airbag Sensor Assembly

      Turn the ignition switch off.

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

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

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

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

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

    7. Clear the DTCs stored in memory Click here.

    8. Turn the ignition switch off.

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

    10. Check for DTCs Click here.

      Result
      Result Proceed to
      DTCs B1692, B1693, B1697 and B1698 are not output. A
      DTC B1692 or B1693 is output. B
      DTC B1697 or B1698 is output. C

      Tech Tips

      Codes other than DTCs B1692, B1693, B1697 and B1698 may be output at this time, but they are not related to this check.


    B

    REPLACE REAR AIRBAG SENSOR LH Click here

    C

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  21. CHECK REAR AIRBAG SENSOR LH


    1. A01EJAEE01
      Text in Illustration
      *1 Rear Airbag Sensor RH
      *2 Center Airbag Sensor Assembly

      Turn the ignition switch off.

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

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

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

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

    6. Clear the DTCs stored in memory Click here.

    7. Turn the ignition switch off.

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

    9. Check for DTCs Click here.

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

      Tech Tips

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


    B

    REPLACE REAR AIRBAG SENSOR LH Click here

    C

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  22. CHECK FRONT DOOR WIRE LH (OPEN)


    1. Disconnect the front door wire LH connector from the floor wire.

      A01ELGFE06

      Tech Tips

      SST has already been inserted into connector E.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      IL1-1 (BDL+) - IL1-2 (BDL-) Always Below 1 Ω
      Text in Illustration
      *1 Side Airbag Sensor LH *2 Rear Airbag Sensor LH
      *3 Front Door Wire LH *4 Floor Wire
      *5

      Front view of wire harness connector

      (to Floor Wire)

      		 *6

      Front view of wire harness connector

      (to Side Airbag Sensor LH)
      *7 Connector D *8 Connector E

    NG

    REPLACE FRONT DOOR WIRE LH

    OK

    REPLACE FLOOR WIRE

  23. CHECK FRONT DOOR WIRE LH (SHORT)


    1. Disconnect the front door wire LH connector from the floor wire.

      A01EK0ME16

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      IL1-1 (BDL+) - IL1-2 (BDL-) Always 1 MΩ or higher
      Text in Illustration
      *1 Side Airbag Sensor LH *2 Rear Airbag Sensor LH
      *3 Front Door Wire LH *4 Floor Wire
      *5

      Front view of wire harness connector

      (to Floor Wire)

      		 *6 Connector D

    NG

    REPLACE FRONT DOOR WIRE LH

    OK

    REPLACE FLOOR WIRE

  24. CHECK FRONT DOOR WIRE LH (SHORT TO B+)


    1. Turn the ignition switch off.

      A01EK0ME16

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

    3. Disconnect the front door wire LH connector from the floor wire.

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

    5. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      IL1-1 (BDL+) - Body ground Ignition switch ON Below 1 V
      IL1-2 (BDL-) - Body ground Ignition switch ON Below 1 V
      Text in Illustration
      *1 Side Airbag Sensor LH *2 Rear Airbag Sensor LH
      *3 Front Door Wire LH *4 Floor Wire
      *5

      Front view of wire harness connector

      (to Floor Wire)

      		 *6 Connector D

    NG

    REPLACE FRONT DOOR WIRE LH

    OK

    REPLACE FLOOR WIRE

  25. CHECK FRONT DOOR WIRE LH (SHORT TO GROUND)


    1. Disconnect the front door wire LH connector from the floor wire.

      A01EK0ME16

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      IL1-1 (BDL+) - Body ground Always 1 MΩ or higher
      IL1-2 (BDL-) - Body ground Always 1 MΩ or higher
      Text in Illustration
      *1 Side Airbag Sensor LH *2 Rear Airbag Sensor LH
      *3 Front Door Wire LH *4 Floor Wire
      *5

      Front view of wire harness connector

      (to Floor Wire)

      		 *6 Connector D

    NG

    REPLACE FRONT DOOR WIRE LH

    OK

    REPLACE FLOOR WIRE