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 center airbag sensor assembly and front seat inner belt assembly RH.

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

  • Front seat inner belt assembly RH malfunction

  • Center airbag sensor assembly malfunction

  • Floor wire

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

  • Center airbag sensor assembly

WIRING DIAGRAM

A01NGVZE02

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK CONNECTORS


    1. Turn the power switch off.

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

      Note

      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 center airbag sensor assembly and front seat inner belt assembly RH.

      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 front seat inner belt assembly RH.

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

      OK
      The terminals are not deformed or damaged.

    NG

    REPLACE FLOOR WIRE

    OK

  2. CHECK FLOOR WIRE (OPEN)


    1. Using SST, connect terminals 15 (RBE+) and 23 (RBE-) of connector B.

      A01NEEOE02

      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
      Tester Connection Condition Specified Condition
      O35-1 (RBE+) - O35-3 (RBE-) Always Below 1 Ω
      Text in Illustration
      *1 Front Seat Inner Belt Assembly RH (Seat Belt Buckle Switch RH) *2 Center Airbag Sensor Assembly
      *3 Floor Wire *4

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)
      *5

      Front view of wire harness connector

      (to Front Seat Inner Belt Assembly RH)

      		 *6 Connector B
      *7 Connector C - -

    NG

    REPLACE FLOOR WIRE

    OK

  3. CHECK FLOOR WIRE (SHORT)


    1. A01NGQGE02
      Text in Illustration
      *1 Front Seat Inner Belt Assembly RH (Seat Belt Buckle Switch RH)
      *2 Center Airbag Sensor Assembly
      *3 Floor Wire
      *4

      Front view of wire harness connector

      (to Front Seat Inner Belt Assembly RH)
      *5 Connector C

      Disconnect SST from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O35-1 (RBE+) - O35-3 (RBE-) Always 1 MΩ or higher

    NG

    REPLACE FLOOR WIRE

    OK

  4. CHECK FLOOR WIRE (SHORT TO B+)


    1. A01NGQGE02
      Text in Illustration
      *1 Front Seat Inner Belt Assembly RH (Seat Belt Buckle Switch RH)
      *2 Center Airbag Sensor Assembly
      *3 Floor Wire
      *4

      Front view of wire harness connector

      (to Front Seat Inner Belt Assembly RH)
      *5 Connector C

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

    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
      O35-1 (RBE+) - Body ground Power switch on (IG) Below 1 V
      O35-3 (RBE-) - Body ground Power switch on (IG) Below 1 V

    NG

    REPLACE FLOOR WIRE

    OK

  5. CHECK FLOOR WIRE (SHORT TO GROUND)


    1. A01NGQGE02
      Text in Illustration
      *1 Front Seat Inner Belt Assembly RH (Seat Belt Buckle Switch RH)
      *2 Center Airbag Sensor Assembly
      *3 Floor Wire
      *4

      Front view of wire harness connector

      (to Front Seat Inner Belt Assembly RH)
      *5 Connector C

      Turn the power switch off.

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

      Note

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O35-1 (RBE+) - Body ground Always 1 MΩ or higher
      O35-3 (RBE-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE FLOOR WIRE

    OK

  6. CHECK FRONT SEAT INNER BELT ASSEMBLY RH


    1. A01NDBSE08
      Text in Illustration
      *1 Front Seat Inner Belt Assembly RH (Seat Belt Buckle Switch RH)
      *2 Center Airbag Sensor Assembly

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

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

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

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

    5. Turn the power switch off.

    6. Turn the power 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 RH Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  7. REPLACE FRONT SEAT INNER BELT ASSEMBLY RH


    1. Turn the power switch off.

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

      Note

      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 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. A01NDBSE08
      Text in Illustration
      *1 Front Seat Inner Belt Assembly RH (Seat Belt Buckle Switch RH)
      *2 Center Airbag Sensor Assembly

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

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

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

    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.

      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