PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2001, B2006

DTC Code DTC Name
B2001 Short to GND in Seat Belt Motor RH Circuit
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 assembly.

When DTC B2001 is detected, DTCs B2015, B2026, and B2027 will not be detected.

When DTC B2006 is detected, DTCs B2020, B2031, and B2032 will not be detected.

DTC Code DTC Detection Condition Trouble Area
B2001 During initial check or with power switch ON (IG), seat belt motor RH side circuit has ground short (terminal MOR+ and MOR- are below 2 V) for 1 second or more

  • Front seat outer belt RH

  • Harness or connector

  • Seat belt control ECU
B2006 During initial check or with power switch ON (IG), seat belt motor LH side circuit has ground short (terminal MOL+ and MOL- are below 2 V) for 1 second or more

  • Front seat outer belt LH

  • Harness or connector

  • Seat belt control ECU

WIRING DIAGRAM

A000XUGE16
for RH
*a Front Seat Outer Belt RH (Seat Belt Motor RH)
*b Seat Belt Control ECU
A000XUGE12
for LH
*a Front Seat Outer Belt 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. 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 SEAT BELT CONTROL ECU

    A000WQIE02

    1. Disconnect the S45 ECU connector.

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

      Standard resistance
      for LH
      Tester Connection Condition Specified Condition
      S45-3 (MOL+) - Body ground Always 10 kΩ or higher
      S45-4 (MOL-) - Body ground Always 10 kΩ or higher
      for RH
      Tester Connection Condition Specified Condition
      S45-2 (MOR+) - Body ground Always 10 kΩ or higher
      S45-1 (MOR-) - Body ground Always 10 kΩ or higher

    OK

    REPLACE SEAT BELT CONTROL ECU Click here

    NG

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

    A000UI9E01

    1. Disconnect the S4*1 and R2*2 belt connectors.

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

      Standard resistance
      for LH
      Tester Connection Condition Specified Condition
      S4-1 - Body ground Always 10 kΩ or higher
      S4-2 - Body ground Always 10 kΩ or higher
      for RH
      Tester Connection Condition Specified Condition
      R2-1 - Body ground Always 10 kΩ or higher
      R2-2 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      NG A
      OK (B2001 is output) B
      OK (B2006 is output) C

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    B

    REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH Click here

    C

    REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH Click here