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 distance control ECU through 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
B2000
  • Short to B+ in the seat belt motor RH circuit continues for 1 second or more

  • Short in the 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

A01606CE22

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. A015YKBE15

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

    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
      P8-1 - Body ground Engine switch on (IG) Below 1 V
      P8-2 - Body ground Engine switch on (IG) Below 1 V
    4. Reconnect the front seat outer belt assembly RH connector.


    NG
    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 Q61 connector of the seat belt control ECU.

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

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

    5. Turn the engine switch on (IG).

    6. A0161U6E12

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      P8-1 - Body ground Engine switch on (IG) Below 1 V
      P8-2 - Body ground Engine switch on (IG) Below 1 V
    7. Disconnect the negative (-) battery terminal.

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

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


    NG
    OK