PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2001

DTC Code DTC Name
B2001 Short to GND 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
B2001 Short to ground in seat belt motor RH circuit continues for 1 second or more

  • Front seat outer belt assembly RH

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

  • Seat belt control ECU

WIRING DIAGRAM

A01NHSRE04

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.

PROCEDURE


  1. INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH


    1. A01NGXQE29

      Disconnect the front seat outer belt assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O32-1 (MOR+) - Body ground Always 1 MΩ or higher
      O32-2 (MOR-) - Body ground Always 1 MΩ or higher

    3. 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 (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) 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. A01NDUBE20
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Front Seat Outer Belt Assembly RH)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O32-1 (MOR+) - Body ground Always 1 MΩ or higher
      O32-2 (MOR-) - Body ground Always 1 MΩ or higher
      O32-1 (MOR+) - O32-2 (MOR-) Always 1 MΩ or higher

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

    6. Connect the cable to the negative (-) 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