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 distance control ECU using CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly RH.

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.

DTC No. DTC Detection Condition Trouble Area
B2001

  • Short to ground in seat belt motor RH circuit continues for 1 second or more

  • Short in seat belt motor RH circuit

  • Front seat outer belt assembly RH

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

  • Seat belt control ECU

WIRING DIAGRAM

A01606CE23

INSPECTION PROCEDURE

Note

When the seat belt control ECU is replaced with a new one, Initialization must be performed Click here.

PROCEDURE


  1. INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH


    1. A015YKBE16

      Disconnect the P8 connector of the front seat outer belt assembly RH.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P8-1 - Body ground Always 1 MΩ or higher
      P8-2 - Body ground Always 1 MΩ or higher

    3. Reconnect the P8 connector of the front seat belt assembly 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.

      Note

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.

    2. Disconnect the P8 connector of the front seat outer belt assembly RH.

    3. Disconnect the Q61 connector of the seat belt control ECU.

    4. A0161U6E13

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P8-1 - Body ground Always 1 MΩ or higher
      P8-2 - Body ground Always 1 MΩ or higher
      P8-1 - P8-2 Always 1 MΩ or higher

    5. Reconnect the Q61 connector of the seat belt control ECU and P8 connector of the front seat outer belt assembly RH.

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


    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