PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2007

DTC Code DTC Name
B2007 Open 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 B2007 is stored, DTCs B2031 and B2032 are not stored.

DTC Code DTC Detection Condition Trouble Area
B2007 During the initial check or with the ignition switch ON, the seat belt motor LH circuit has an open (the voltage at terminal MOL+ is 8.5 V or higher and the voltage at terminal 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+) - G117-4 (MOL-) Always Below 20 Ω

    OK

    REPLACE SEAT BELT CONTROL ECU Click here

    NG

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


    1. Disconnect the G117 ECU connector.

    2. Disconnect the R3 belt connector.

    3. Using a service wire, connect terminals R3-1 (MOL+) and R3-2 (MOL-) of the connector of the front seat outer belt LH.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G117-3 (MOL+) - G117-4 (MOL-) Always Below 2 Ω

    OK

    REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR