PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2006

DTC Code DTC Name
B2006 Short to GND in Seat Belt Motor LH Circuit

DESCRIPTION

The seat belt control ECU receives collision information from the driving support ECU and skid control ECU via CAN communication, and tightens the seat belt by operating the motor inside the front seat outer belt LH.

When DTC B2006 is stored, DTCs B2020, B2031 and B2032 are not stored.

DTC Code DTC Detection Condition Trouble Area
B2006 During the initial check or with the ignition switch ON, the seat belt motor LH circuit has a ground short (the voltage at terminals MOL+ and MOL- is below 2 V) for 1 second or more.

  • Front seat outer belt assembly LH

  • Harness or connector

  • Seat belt control ECU

WIRING DIAGRAM

A006SJEE02

INSPECTION PROCEDURE

CAUTION:

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

PROCEDURE


  1. CHECK FRONT SEAT OUTER BELT ASSEMBLY LH CIRCUIT

    A006TV8E02
    Text in Illustration
    *1 for LHD
    *2 for RHD
    *3

    Front view of wire harness connector

    (to Seat Belt Control ECU)

    1. Disconnect the A52*1 or D109*2 ECU connector.

      *1: for LHD

      *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      A52-3 (MOL+) - Body ground Always 10 kΩ or higher
      A52-4 (MOL-) - Body ground
      for RHD
      Tester Connection Condition Specified Condition
      D109-3 (MOL+) - Body ground Always 10 kΩ or higher
      D109-4 (MOL-) - Body ground
      Result
      Result Proceed to
      NG A
      OK (for LHD) B
      OK (for RHD) C

    B

    REPLACE SEAT BELT CONTROL ECU Click here

    C

    REPLACE SEAT BELT CONTROL ECU Click here

    A

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

    A006TYGE02
    Text in Illustration
    *1

    Front view of wire harness connector

    (to Front Seat Outer Belt Assembly LH)

    1. Disconnect the G47 belt connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G47-1 (MOL+) - Body ground Always 10 kΩ or higher
      G47-2 (MOL-) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH Click here