AIRBAG SYSTEM, Diagnostic DTC:B1655/37

DTC Code DTC Name
B1655/37 Driver Side Seat Belt Buckle Switch Circuit Malfunction

DESCRIPTION

The driver side seat belt buckle switch circuit consists of the center airbag sensor assembly and the front seat inner belt assembly (driver side).

DTC B1655/37 is recorded when a malfunction is detected in the driver side seat belt buckle switch circuit.

DTC No. DTC Detection Condition Trouble Area
B1655/37

  • 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 driver side seat belt buckle switch circuit for 2 seconds.

  • Front seat inner belt assembly (driver side) malfunction

  • Center airbag sensor assembly malfunction

  • No. 2 floor wire (for LHD)

  • Floor wire (for RHD)

  • Front seat inner belt assembly (Driver side seat belt buckle switch)

  • Center airbag sensor assembly

WIRING DIAGRAM

A0161VAE01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK CONNECTORS


    1. Turn the engine 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 and front seat inner belt assembly (driver side).

      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 and the front seat inner belt assembly (driver side).

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

      OK
      The terminals are not deformed or damaged.
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE NO. 2 FLOOR WIRE

    C

    REPLACE FLOOR WIRE

    A

  2. CHECK WIRE HARNESS (OPEN)


    1. Using SST, connect terminals 11 (DBE+) and 12 (DBE-) of connector B.

      A01607EE04

      Note

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

      SST
      09843-18040

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      Q6-1 (LBE+) - Q6-3 (LBE-) Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      P4-1 (RBE+) - P4-3 (RBE-) Always Below 1 Ω
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE NO. 2 FLOOR WIRE

    C

    REPLACE FLOOR WIRE

    A

  3. CHECK WIRE HARNESS (SHORT)


    1. A01622VE03

      Disconnect SST from connector B.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      Q6-1 (LBE+) - Q6-3 (LBE-) Always 1 MΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      P4-1 (RBE+) - P4-3 (RBE-) Always 1 MΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE NO. 2 FLOOR WIRE

    C

    REPLACE FLOOR WIRE

    A

  4. CHECK WIRE HARNESS (SHORT TO B+)


    1. A01622VE03

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

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      Q6-1 (LBE+) - Body ground Engine switch on (IG) Below 1 V
      Q6-3 (LBE-) - Body ground Engine switch on (IG) Below 1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      P4-1 (RBE+) - Body ground Engine switch on (IG) Below 1 V
      P4-3 (RBE-) - Body ground Engine switch on (IG) Below 1 V
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE NO. 2 FLOOR WIRE

    C

    REPLACE FLOOR WIRE

    A

  5. CHECK WIRE HARNESS (SHORT TO GROUND)


    1. A01622VE03

      Turn the engine 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
      for LHD
      Tester Connection Condition Specified Condition
      Q6-1 (LBE+) - Body ground Always 1 MΩ or higher
      Q6-3 (LBE-) - Body ground Always 1 MΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      P4-1 (RBE+) - Body ground Always 1 MΩ or higher
      P4-3 (RBE-) - Body ground Always 1 MΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE NO. 2 FLOOR WIRE

    C

    REPLACE FLOOR WIRE

    A

  6. CHECK FRONT SEAT INNER BELT ASSEMBLY (DRIVER SIDE)


    1. A0160AOE02

      Connect the connectors to the center airbag sensor assembly and the front seat inner belt assembly (driver side).

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

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

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

    5. Turn the engine switch off.

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

    7. Check for DTCs Click here.

      OK
      DTC B1655/37 is not output.

      Tech Tips

      Codes other than DTC B1655/37 may be output at this time, but they are not related to this check.


    NG

    REPLACE FRONT SEAT INNER BELT ASSEMBLY (DRIVER SIDE) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  7. REPLACE FRONT SEAT INNER BELT ASSEMBLY (DRIVER SIDE)


    1. Turn the engine switch off.

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

    3. Replace the front seat inner belt assembly (driver side) with a known good part Click here.

      Tech Tips

      Perform the following inspection using known good parts from another vehicle if possible.


    NEXT

  8. CHECK CENTER AIRBAG SENSOR ASSEMBLY


    1. A0160AOE03

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

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

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

    4. Turn the engine switch off.

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

    6. Check for DTCs Click here.

      OK
      DTC B1655/37 is not output.

      Tech Tips

      Codes other than DTC B1655/37 may be output at this time, but they are not related to this check.


    NG

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    OK

    END