AIRBAG SYSTEM, Diagnostic DTC:B1642, B1643

DTC Code DTC Name
B1642 Side Satellite Sensor Bus Lost Communication (RH)
B1643 Side Satellite Sensor Bus Initialization Error (RH)

DESCRIPTION

The side collision sensor RH circuit (bus 1) consists of the airbag sensor assembly, door side airbag sensor RH and side No. 2 airbag sensor RH.

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

These DTCs are stored when a malfunction is detected in the side collision sensor RH circuit (bus 1).

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1642 Side Satellite Sensor Bus Lost Communication (RH)

  • The airbag sensor assembly detects a line short, short to ground or B+, or an open in the side collision sensor RH circuit (bus 1).

  • Side No. 2 airbag sensor RH malfunction

  • Door side airbag sensor RH malfunction

  • Airbag sensor assembly malfunction

  • Floor wire

  • Front door wire RH

  • Side No. 2 airbag sensor RH

  • Door side airbag sensor RH

  • Airbag sensor assembly

 Comes on Does not apply to test/check mode
B1643 Side Satellite Sensor Bus Initialization Error (RH)

  • The airbag sensor assembly detects a line short, short to ground or B+, or an open in the side collision sensor RH circuit (bus 1).

  • Side No. 2 airbag sensor RH malfunction

  • Door side airbag sensor RH malfunction

  • Airbag sensor assembly malfunction

  • Floor wire

  • Front door wire RH

  • Side No. 2 airbag sensor RH

  • Door side airbag sensor RH

  • Airbag sensor assembly

 Comes on Does not apply to test/check mode

WIRING DIAGRAM

B0070L2E13

CAUTION / NOTICE / HINT

Note

After turning the ignition 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

PROCEDURE


  1. CHECK CONNECTION OF CONNECTORS


    1. Turn the ignition switch off.

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

      CAUTION:

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

    3. Check that the connectors are properly connected to the airbag sensor assembly, door side airbag sensor RH and side No. 2 airbag sensor RH. Also check that the connectors that link the floor wire and front door wire RH are properly connected.

      OK
      The connectors are properly connected.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  2. CHECK CONNECTORS


    1. Disconnect the connectors from the airbag sensor assembly, door side airbag sensor RH and side No. 2 airbag sensor RH. Also disconnect the connectors that link the floor wire and front door wire RH.

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

      OK
      The terminals are not deformed or damaged.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FLOOR WIRE OR FRONT DOOR WIRE RH

    OK

  3. CHECK FLOOR WIRE


    1. B0071LWC01
      *1 Side No. 2 Airbag Sensor RH
      *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 No. 2 Airbag Sensor RH)

      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 Condition Specified Condition
      R33-4 (BCR+) - Body ground Ignition switch ON Below 1 V
      R33-3 (BCR-) - Body ground Ignition switch ON Below 1 V

    4. Turn the ignition switch off.

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

      CAUTION:

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

    6. Using a service wire, connect terminals 25 (BBR+) and 26 (BBR-) of connector B.

      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
      R33-4 (BCR+) - R33-3 (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
      R33-4 (BCR+) - R33-3 (BCR-) Always 1 MΩ or higher
      R33-4 (BCR+) - Body ground Always 1 MΩ or higher
      R33-3 (BCR-) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FLOOR WIRE

    OK

  4. CHECK WIRE HARNESS


    1. B0070PFC06
      *1 Door Side Airbag Sensor RH
      *2 Side No. 2 Airbag Sensor RH
      *3 Front Door Wire RH
      *4 Floor Wire
      *5 Service Wire
      *a

      Front view of wire harness connector

      (to Side No. 2 Airbag Sensor RH)
      *b

      Front view of wire harness connector

      (to Door Side Airbag Sensor RH)

      Connect the connectors that link the floor wire and front door wire RH.

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

    3. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      R33-1 (BDR+) - Body ground Ignition switch ON Below 1 V
      R33-2 (BDR-) - Body ground Ignition switch ON Below 1 V

    5. Turn the ignition switch off.

    6. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

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

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

      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
      R33-1 (BDR+) - R33-2 (BDR-) 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
      R33-1 (BDR+) - R33-2 (BDR-) Always 1 MΩ or higher
      R33-1 (BDR+) - Body ground Always 1 MΩ or higher
      R33-2 (BDR-) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    CHECK FLOOR WIRE Click here

    OK

  5. CHECK SIDE NO. 2 AIRBAG SENSOR RH


    1. B006Z22C02
      *1 Side No. 2 Airbag Sensor LH
      *2 Airbag Sensor Assembly

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

    2. Interchange the side No. 2 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.


      Body Electrical > SRS Airbag > Clear DTCs

    6. Turn the ignition switch off.

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

    8. Check for DTCs.


      Body Electrical > SRS Airbag > Trouble Codes

      Tech Tips

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

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

    9. Turn the ignition switch off.

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

      CAUTION:

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

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


    B

    REPLACE SIDE NO. 2 AIRBAG SENSOR RH Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  6. CHECK DOOR SIDE AIRBAG SENSOR RH


    1. B0071E2C02
      *1 Door Side Airbag Sensor LH
      *2 Side No. 2 Airbag Sensor RH

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

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

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

    4. Clear the DTCs stored in memory.


      Body Electrical > SRS Airbag > Clear DTCs

    5. Turn the ignition switch off.

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

    7. Check for DTCs.


      Body Electrical > SRS Airbag > Trouble Codes

      Tech Tips

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

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

    8. Turn the ignition switch off.

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

      CAUTION:

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

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


    A

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    B

    REPLACE DOOR SIDE AIRBAG SENSOR RH Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

  7. CHECK FLOOR WIRE


    1. B006XZEC19
      *1 Door Side Airbag Sensor RH
      *2 Side No. 2 Airbag Sensor RH
      *3 Front Door Wire RH
      *4 Floor Wire
      *5 Service Wire
      *a

      Front view of wire harness connector

      (to Side No. 2 Airbag Sensor RH)
      *b

      Front view of wire harness connector

      (to Front Door Wire RH)

      Disconnect the floor wire connector from the front door wire RH.

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

    3. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      NR1-23 (BDR+) - Body ground Ignition switch ON Below 1 V
      NR1-41 (BDR-) - Body ground Ignition switch ON Below 1 V

    5. Turn the ignition switch off.

    6. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

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

    7. Using a service wire, connect terminals 1 (BDR+) and 2 (BDR-) 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
      NR1-23 (BDR+) - NR1-41 (BDR-) 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
      NR1-23 (BDR+) - NR1-41 (BDR-) Always 1 MΩ or higher
      NR1-23 (BDR+) - Body ground Always 1 MΩ or higher
      NR1-41 (BDR-) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT DOOR WIRE RH

    NG

    REPLACE FLOOR WIRE