PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2000

DTC Code DTC Name
B2000 Short to B+ in Seat Belt Motor RH Circuit

DESCRIPTION

The seat belt control ECU receives information from the driving support ECU using CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly RH.

DTC No. DTC Detection Condition Trouble Area
B2000 Short to B+ in the seat belt motor RH circuit continues for 1 second or more.

  • Front seat outer belt assembly RH

  • Wire harness or connector (seat belt control ECU - front seat outer belt assembly RH)

  • Seat belt control ECU

WIRING DIAGRAM

A003X2ZE25

INSPECTION PROCEDURE

CAUTION:

The pretensioner is built into the front seat outer belt assembly RH. Be sure to follow the correct inspection procedure, as failure to follow the correct procedure (such as inspection of incorrect connectors) may deploy the pretensioner.

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 to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.

PROCEDURE


  1. INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH


    1. A003WPEE45

      Remove the front seat outer belt assembly RH connector Click here.

    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
      Q22-1 - Body ground Power switch on (IG) Below 1 V
      Q22-2 - Body ground Power switch on (IG) Below 1 V

    4. Reconnect the front seat outer belt assembly RH connector.


    NG

    REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU)


    1. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

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

    2. Disconnect the front seat outer belt assembly RH connector.

    3. Disconnect the seat belt control ECU connector.

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

    5. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Q22-1 - Body ground Power switch on (IG) Below 1 V
      Q22-2 - Body ground Power switch on (IG) Below 1 V

    7. Disconnect the cable from the negative (-) auxiliary battery terminal.

    8. Reconnect the seat belt control ECU and front seat outer belt assembly RH connectors.

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


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU)

    OK

    REPLACE SEAT BELT CONTROL ECU Click here