PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2002, B2007

DTC Code DTC Name
B2002 Open in Seat Belt Motor RH Circuit
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 assembly via CAN communication, and tightens the seat belt by operating the motor inside the front seat outer belt assembly.

When DTC B2002 is detected, DTCs B2026 and B2027 will not be detected.

When DTC B2007 is detected, DTCs B2031 and B2032 will not be detected.

DTC Code DTC Detection Condition Trouble Area
B2002 Open in the seat belt motor RH circuit continues for 1 second or more.

  • Front seat outer belt assembly RH

  • Seat belt control ECU

  • Harness or connector
B2007 Open in the seat belt motor LH circuit continues for 1 second or more.

  • Front seat outer belt assembly LH

  • Seat belt control ECU

  • Harness or connector

WIRING DIAGRAM

A01FRF6E01
A01FRF6E05

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. INSPECT FRONT SEAT OUTER BELT ASSEMBLY

    A01FQXZE01
    Text in Illustration
    *a

    Component without harness connected

    (Front Seat Outer Belt Assembly)

    1. Disconnect the front seat outer belt assembly RH or front seat outer belt assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always Below 20 Ω
      Result
      Result Proceed to
      NG A
      OK (B2002 is output) B
      OK (B2007 is output) C

    B

    REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH Click here

    C

    REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH Click here

    A

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

    A01FSBFE01
    Text in Illustration
    *A for LH
    *B for RH
    *1 Service wire
    *a

    Front view of wire harness connector

    (to Front Seat Outer Belt Assembly)
    *b

    Front view of wire harness connector

    (to Seat Belt Control ECU)

    1. Disconnect the front seat outer belt assembly LH or front seat outer belt assembly RH connector.

    2. Disconnect the seat belt control ECU connector.

    3. Using a service wire, connect terminals U1-1*1 or T9-1*2 and U1-2*1 or T9-2*2 of the connector on the front seat outer belt assembly.


      • *1: for LH

      • *2: for RH

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

      Standard Resistance
      Tester Connection Connector Specified Condition
      U34-2 (MOR+) - U34-1 (MOR-) Always Below 2 Ω
      U34-3 (MOL+) - U34-4 (MOL-) Always Below 2 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE SEAT BELT CONTROL ECU Click here