AIRBAG SYSTEM, Diagnostic DTC:B1655/37

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

DESCRIPTION

The seat belt buckle switch RH circuit consists of the airbag sensor assembly and front seat inner belt assembly RH.

DTC B1655/37 is stored when a malfunction is detected in the seat belt buckle switch RH circuit.

DTC No. DTC Detection Condition Trouble Area
B1655/37
  • The airbag sensor assembly detects a line short, short to ground or B+, or an open in the seat belt buckle switch RH circuit.

  • Front seat inner belt assembly RH malfunction

  • Airbag sensor assembly malfunction


  • No. 2 floor wire

  • Front seat inner belt assembly RH (Seat belt buckle switch RH)

  • Airbag sensor assembly

WIRING DIAGRAM

A01G6V8E10

INSPECTION PROCEDURE

Note

After turning the engine 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 CONNECTORS


    1. Turn the engine 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 and front seat inner belt assembly RH.

      OK
      The connectors are properly connected.

      Tech Tips

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

    4. Disconnect the connectors from the airbag sensor assembly and front seat inner belt assembly RH.

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

      OK
      The terminals are not deformed or damaged.

    NG
    OK
  2. CHECK NO. 2 FLOOR WIRE (OPEN)


    1. A01G4MZE01
      Text in Illustration
      *1 Front Seat Inner Belt Assembly RH
      *2 Airbag Sensor Assembly
      *3 No. 2 Floor Wire
      *4 Service Wire
      *a

      Front view of wire harness connector

      (to Airbag Sensor Assembly)

      *b

      Front view of wire harness connector

      (to Front Seat Inner Belt Assembly RH)

      Using a service wire, connect terminals 15 (RBE+) and 23 (RBE-) of connector B.

      Note

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q32-2 (RBE+) - Q32-1 (RBE-) Always Below 1 Ω
    3. Disconnect the service wire from connector B.


    NG
    OK
  3. CHECK NO. 2 FLOOR WIRE (SHORT)


    1. A01G5FHE01
      Text in Illustration
      *1 Front Seat Inner Belt Assembly RH
      *2 Airbag Sensor Assembly
      *3 No. 2 Floor Wire
      *a

      Front view of wire harness connector

      (to Front Seat Inner Belt Assembly RH)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q32-2 (RBE+) - Q32-1 (RBE-) Always 1 MΩ or higher

    NG
    OK
  4. CHECK NO. 2 FLOOR WIRE (SHORT TO B+)


    1. A01G5FHE01
      Text in Illustration
      *1 Front Seat Inner Belt Assembly RH
      *2 Airbag Sensor Assembly
      *3 No. 2 Floor Wire
      *a

      Front view of wire harness connector

      (to Front Seat Inner Belt Assembly RH)

      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
      Tester Connection Condition Specified Condition
      Q32-2 (RBE+) - Body ground Engine switch on (IG) Below 1 V
      Q32-1 (RBE-) - Body ground Engine switch on (IG) Below 1 V
    4. Turn the engine 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.


    NG
    OK
  5. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)


    1. A01G5FHE01
      Text in Illustration
      *1 Front Seat Inner Belt Assembly RH
      *2 Airbag Sensor Assembly
      *3 No. 2 Floor Wire
      *a

      Front view of wire harness connector

      (to Front Seat Inner Belt Assembly RH)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q32-2 (RBE+) - Body ground Always 1 MΩ or higher
      Q32-1 (RBE-) - Body ground Always 1 MΩ or higher

    NG
    OK
  6. CHECK DTC


    1. A01G7ROE01
      Text in Illustration
      *1 Front Seat Inner Belt Assembly RH
      *2 Airbag Sensor Assembly

      Connect the connectors to the airbag sensor assembly and front seat inner belt assembly RH.

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

    3. Clear the DTCs stored in 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
    OK
  7. CHECK FRONT SEAT INNER BELT ASSEMBLY RH


    1. A01G7ROE01
      Text in Illustration
      *1 Front Seat Inner Belt Assembly RH
      *2 Airbag Sensor Assembly

      Turn the engine 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. Replace the front seat inner belt assembly RH with a known good one Click here.

      Tech Tips

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

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

    5. Clear the DTCs stored in memory Click here.

    6. Turn the engine switch off.

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

    8. 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.

    9. Turn the engine 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. Restore the front seat inner belt assembly RH that was installed for testing to its original location Click here.


    NG
    OK