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 assembly 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

A0040KKE04

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. A004239E05
      Text in Illustration
      *a

      Component without harness connected

      (Front Seat Outer Belt Assembly RH)

      Disconnect the S8 front seat outer belt assembly RH connector.

      Tech Tips

      Do not remove the front seat outer belt assembly RH.

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      S8-1 - Body ground Power switch on (IG) Below 1 V
      S8-2 - Body ground Power switch on (IG) Below 1 V

      CAUTION:

      Do not check a wrong connector.


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


    1. A004157E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Seat Belt Control ECU)

      Disconnect the L3 seat belt control ECU connector.

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      L3-1 (MOR-) - Body ground Power switch on (IG) Below 1 V
      L3-2 (MOR+) - Body ground Power switch on (IG) Below 1 V

    NG
    OK