AIRBAG SYSTEM, Diagnostic DTC:B1625/22

DTC Code DTC Name
B1625/22 Side Airbag Sensor LH Circuit Malfunction

DESCRIPTION

The side airbag sensor LH consists of a safing sensor, diagnostic circuit, lateral deceleration sensor, etc.

If the center airbag sensor receives signals from the lateral deceleration sensor, it determines whether the SRS should be activated.

DTC B1625/22 is stored when a malfunction is detected in the side airbag sensor LH circuit.

DTC Code Detection Condition Trouble Area
B1625/22

One of the following conditions is met:


  • A side airbag sensor LH malfunction.

  • A center airbag sensor malfunction.

  • Side airbag sensor assembly LH

  • Rear airbag sensor LH

  • Floor wire

  • Center airbag sensor assembly

WIRING DIAGRAM

A003DCCE05

INSPECTION PROCEDURE

Note


  • When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected Click here.

  • w/ Navigation System (for HDD):

    After the ignition switch is turned off, the HDD navigation system requires approximately a minute to record various types of memory and settings. As a result, after turning the ignition switch off, wait a minute or more before disconnecting the cable from the negative (-) battery terminal.

PROCEDURE


  1. CHECK CONNECTION OF 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 and side airbag sensor LH.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  2. CHECK CONNECTORS


    1. Disconnect the connectors from the center airbag sensor and side airbag sensor LH.

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

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE FLOOR WIRE

    OK

  3. CHECK FLOOR WIRE (SIDE AIRBAG SENSOR LH CIRCUIT)

    A003C3OE01
    Text in Illustration
    *1 Side Airbag Sensor LH
    *2 Floor Wire
    *3 Center Airbag Sensor
    *4

    Rear view of wire harness connector

    (to Side Airbag Sensor LH)
    *5 Connector C
    *6

    Rear view of wire harness connector

    (to Center Airbag Sensor)
    *7 Connector B
    *8 Service Wire

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

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G8-4 (BBL+) - Body ground Ignition switch ON Below 1 V
      G8-3 (BBL-) - Body ground

    3. Turn the ignition switch off.

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

    5. 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 a service wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G8-4 (BBL+) - G8-3 (BBL-) Always Below 1 Ω

    7. Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G8-4 (BBL+) - G8-3 (BBL-) Always 1 MΩ or higher
      G8-4 (BBL+) - Body ground
      G8-3 (BBL-) - Body ground

    NG

    REPLACE FLOOR WIRE

    OK

  4. CHECK SIDE AIRBAG SENSOR LH

    A003D4SE02
    Text in Illustration
    *1 Side Airbag Sensor RH
    *2 Center Airbag Sensor

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

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

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

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

    5. Turn the ignition switch off.

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

    7. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1620 and B1625 are not output A
      DTC B1620 is output B
      DTC B1625 is output C

      Tech Tips

      Codes other than DTC B1620 and B1625 may be output at this time, but they are not related to this check.

    8. Turn the ignition switch off.

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

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


    B

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH Click here

    C

    CHECK CONNECTION OF CONNECTORS Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  5. CHECK CONNECTION OF CONNECTORS


    1. Check that the connectors are properly connected to the rear airbag sensor LH.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  6. CHECK CONNECTORS


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

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

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE FLOOR WIRE

    OK

  7. CHECK FLOOR WIRE (REAR AIRBAG SENSOR LH CIRCUIT)

    A003D21E03
    Text in Illustration
    *1 Rear Airbag Sensor LH
    *2 Floor Wire
    *3 Side Airbag Sensor LH
    *4

    Rear view of wire harness connector

    (to Rear Airbag Sensor LH)
    *5 Connector C
    *6

    Rear view of wire harness connector

    (to Side Airbag Sensor LH)
    *7 Connector B
    *8 Service Wire

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

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G10-2 (BCL+) - Body ground Ignition switch ON Below 1 V
      G10-1 (BCL-) - Body ground

    3. Turn the ignition switch off.

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

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

      Note

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G10-2 (BCL+) - G10-1 (BCL-) Always Below 1 Ω

    7. Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G10-2 (BCL+) - G10-1 (BCL-) Always 1 MΩ or higher
      G10-2 (BCL+) - Body ground
      G10-1 (BCL-) - Body ground

    NG

    REPLACE FLOOR WIRE

    OK

  8. CHECK FOR DTC

    A003ELPE01
    Text in Illustration
    *1 Rear Airbag Sensor LH
    *2 Side Airbag Sensor LH

    1. Connect the connectors to the side airbag sensor LH.

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

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

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

    5. Turn the ignition switch off.

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

    7. Check for DTCs Click here.

      OK
      DTC B1625 is output.
      Result
      Result Proceed to
      OK A
      NG (for Sedan) B
      NG (for Wagon) C

      Tech Tips

      Codes other than B1625 may be output at this time, but they are not related to this check.


    B

    REPLACE REAR AIRBAG SENSOR LH Click here

    C

    REPLACE REAR AIRBAG SENSOR LH Click here

    A

  9. CHECK SIDE AIRBAG SENSOR LH

    A003D4SE03
    Text in Illustration
    *1 Side Airbag Sensor RH
    *2 Center Airbag Sensor

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

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

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

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

    5. Turn the ignition switch off.

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

    7. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1620 and B1625 are not output A
      DTC B1620 is output B
      DTC B1625 is output C

      Tech Tips

      Codes other than DTC B1620 and B1625 may be output at this time, but they are not related to this check.

    8. Turn the ignition switch off.

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

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


    B

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH Click here

    C

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here