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

A004N9XE02

CAUTION / NOTICE / HINT

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

    A004SJ4E01
    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+) - A52-4 (MOL-) Always 20 Ω
      for RHD
      Tester Connection Condition Specified Condition
      D109-3 (MOL+) - D109-4 (MOL-) Always 20 Ω
      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)

    A004RQJE01
    Text in Illustration
    *1 for LHD
    *2 for RHD
    *3

    Front view of wire harness connector

    (to Seat Belt Control ECU)
    *4

    Front view of wire harness connector

    (to Front Seat Outer Belt Assembly LH)
    *5 Service Wire

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

      *1: for LHD

      *2: for RHD

    2. Disconnect the G47 belt connector.

    3. Using a service wire, connect terminals G47-1 (MOL+) and G47-2 (MOL-) of the connector on the front seat outer belt LH.

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

      Standard Resistance
      for LHD
      Tester Connection Connector Specified Condition
      A52-3 (MOL+) - A52-4 (MOL-) Always Below 1 Ω
      for RHD
      Tester Connection Connector Specified Condition
      D109-3 (MOL+) - D109-4 (MOL-) Always Below 1 Ω

    OK

    REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR