PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2002

DTC Code DTC Name
B2002 Open in Seat Belt Motor RH Circuit

DESCRIPTION

The seat belt control ECU receives information from the driving support ECU assembly using CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly RH.

DTC No. 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

  • Wire harness or connector (seat belt control ECU - front seat outer belt assembly RH)

  • Seat belt control ECU

WIRING DIAGRAM

A005BI9E03
*a Front Seat Outer Belt Assembly RH
*b Seat Belt Control ECU

CAUTION / NOTICE / HINT

CAUTION:

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

Note

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.

PROCEDURE


  1. INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH


    1. A005BRPE01
      Text in Illustration
      *a

      Component without harness connected

      (Front Seat Outer Belt Assembly RH)

      Disconnect the S7 front seat outer belt assembly RH connector.

      Tech Tips

      Do not remove the front seat outer belt assembly RH.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      S7-1 (MOR+) - S7-2 (MOR-) Always Below 20 Ω

      CAUTION:

      Do not check a wrong connector.


    NG

    REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH Click here

    OK

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


    1. Disconnect the L2 seat belt control ECU connector.

    2. Using a service wire, connect 1 and 2 of the connector on the front seat outer belt assembly RH.

      Note

      Do not forcibly insert the service wire into the terminals of the connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L2-1 (MOR-) - L2-2 (MOR+) Always Below 1 Ω

    4. Disconnect the service wire from the connector.


    OK

    REPLACE SEAT BELT CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU)