DTC    B2001    Short to GND in Seat Belt Motor RH Circuit

for Preparation Click here


DESCRIPTION

The seat belt control ECU receives information from the driving support ECU 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
B2001
Short to ground in the seat belt motor RH circuit continues for 1 second or more.
  1. Front seat outer belt assembly RH
  2. Wire harness or connector (seat belt control ECU - front seat outer belt assembly RH)
  3. Seat belt control ECU

WIRING DIAGRAM


E183039E25


INSPECTION PROCEDURE

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.

NOTICE:
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 to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work (Click here).

1.INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH


    B139235E45

  1. Remove the front seat outer belt assembly RH connector (Click here).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Q22-1 - Body ground
    		Always
    		1 MΩ or higher
    Q22-2 - Body ground
    		Always
    		1 MΩ or higher

  1. Reconnect the front seat outer belt assembly RH 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 cable from the negative (-) auxiliary battery terminal.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

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

  1. Disconnect the seat belt control ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Q22-1 - Body ground
    		Always
    		1 MΩ or higher
    Q22-2 - Body ground
    		Always
    		1 MΩ or higher
    Q22-1 - Q22-2
    		Always
    		1 MΩ or higher

  1. Reconnect the seat belt control ECU and front seat outer belt assembly RH connectors.

  1. Connect the cable to the negative (-) auxiliary battery terminal.



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

REPLACE SEAT BELT CONTROL ECU (Click here)