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

A01XIL5E20
*a Front Seat Outer Belt Assembly LH (Seat Belt Motor LH)
*b Seat Belt Control ECU

CAUTION / NOTICE / HINT

CAUTION:

The pretensioner is built into the front seat outer belt assembly LH. 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


    1. A01XHD3E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Seat Belt Control ECU)

      Disconnect the G117 ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G117-3 (MOL+) - Body ground Always 1 MΩ or higher
      G117-4 (MOL-) - Body ground

    OK

    REPLACE SEAT BELT CONTROL ECU Click here

    NG

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


    1. A01XCVFE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Front Seat Outer Belt Assembly LH)

      Disconnect the R3 belt connector.

    2. Disconnect the G117 ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R3-1 (MOL+) - Body ground Always 1 MΩ or higher
      R3-2 (MOL-) - Body ground

    OK

    REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR