AIRBAG SYSTEM, Diagnostic DTC:B1628

DTC Code DTC Name
B1628 Side Airbag Sensor Assembly Initialization Error (LH)

DESCRIPTION

The circuit for the side collision sensor LH is composed of the airbag ECU assembly, door side airbag sensor LH, side airbag sensor assembly LH and rear airbag sensor LH.

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

DTC B1628 is stored when a malfunction is detected in the circuit for the side collision sensor LH.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1628 Side Airbag Sensor Assembly Initialization Error (LH)

One of the following conditions is met:


  • The airbag ECU assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the circuit for the side collision sensor LH for 2 seconds.

  • A side airbag sensor assembly LH malfunction.

  • An airbag ECU assembly malfunction.

  • Floor wire

  • Side airbag sensor assembly LH

  • Airbag ECU assembly

 Comes on Not applicable

WIRING DIAGRAM

B004SR8E10
*a Rear Airbag Sensor LH
*b Door Side Airbag Sensor LH
*c Side Airbag Sensor Assembly LH
*d Airbag ECU 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 PAST DTC


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

    2. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Proceed to
      DTC B1627 is not output
      DTC B1627 is output

    DTC B1627 is output

    GO TO DTC B1627 Click here

    DTC B1627 is not output

  2. CHECK DTC


    1. Turn the power switch off.

      Tech Tips

      If a communication error occurs, DTCs for both the LH and RH sides will be stored simultaneously. The malfunctioning area can be identified by turning the power switch off and then on (IG) again.

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

    3. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Proceed to
      DTC B1628 is output
      DTC B1628 is not output

      Tech Tips

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


    DTC B1628 is not output

    USE SIMULATION METHOD TO CHECK Click here

    DTC B1628 is output

  3. CHECK CONNECTION OF CONNECTORS


    1. Turn the power switch off.

    2. Disconnect the cable from the negative (-) auxiliary 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 assembly LH.

      Result
      Proceed to
      The connectors are properly connected
      The connectors are not properly connected

    The connectors are not properly connected

    CONNECT CONNECTORS PROPERLY

    The connectors are properly connected

  4. CHECK CONNECTORS


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

    2. B004TVCC02
      *1 Side Airbag Sensor Assembly LH
      *2 Rear Airbag Sensor LH
      *3 Floor Wire

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

      Result
      Proceed to
      The connectors are not deformed or damaged
      The connectors are deformed or damaged

    The connectors are deformed or damaged

    REPLACE FLOOR WIRE

    The connectors are not deformed or damaged

  5. CHECK FLOOR WIRE


    1. B004XT1C03
      *1 Side Airbag Sensor Assembly LH
      *2 Rear Airbag Sensor 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 Rear Airbag Sensor LH)

      Connect the cable to the negative (-) auxiliary battery terminal, 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
      L66-4 (BBL+) - Body ground Power switch on (IG) Below 1 V
      L66-3 (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, and wait for at least 90 seconds.

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

      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
      L66-4 (BBL+) - L66-3 (BBL-) 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
      L66-4 (BBL+) - L66-3 (BBL-) Always 1 MΩ or higher
      L66-4 (BBL+) - Body ground Always 1 MΩ or higher
      L66-3 (BBL-) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FLOOR WIRE

    OK

  6. CHECK SIDE AIR BAG SENSOR ASSEMBLY LH


    1. B004VAHC09
      *1 Side Airbag Sensor Assembly RH
      *2 Rear Airbag Sensor LH

      Connect the connector to the rear airbag sensor LH.

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

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

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

    5. Clear the DTCs stored.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    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


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Proceed to
      DTC B1623 is output
      DTC B1628 is output
      DTC B1623 and B1628 are not output

      Tech Tips

      Codes other than DTC B1642, B1643, B1647 and B1648 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, and wait for at least 90 seconds.

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


    DTC B1623 is output

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH Click here

    DTC B1623 and B1628 are not output

    USE SIMULATION METHOD TO CHECK Click here

    DTC B1628 is output

  7. CHECK DTC


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

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

    3. Clear the DTCs.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    4. Turn the power switch off.

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

    6. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Proceed to
      DTC B1628 is output
      DTC B1628 is not output

      Tech Tips

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


    DTC B1628 is output

    REPLACE AIRBAG ECU ASSEMBLY Click here

    DTC B1628 is not output

    USE SIMULATION METHOD TO CHECK Click here