Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJSS
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 11/2017]
Title: PRE-COLLISION: PRE-COLLISION SYSTEM: B2006; Short to GND in Seat Belt Motor LH Circuit; 2016 - 2017 MY Sienna [12/2015 - 11/2017]

DTC

B2006

Short to GND in Seat Belt Motor LH Circuit

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 LH.

DTC No.

DTC Detection Condition

Trouble Area

B2006

Short to ground in the seat belt motor LH circuit continues for 1 second or more.
  • Front seat outer belt assembly LH
  • Harness or connector
  • Seat belt control ECU

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

The pretensioner is built into the front seat outer belt assembly LH. 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.

PROCEDURE

1.

INSPECT FRONT SEAT OUTER BELT ASSEMBLY LH

(a) Disconnect the K5 front seat outer belt assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K5-1 - Body ground

Always

1 MΩ or higher

K5-2 - Body ground

Always

1 MΩ or higher

Text in Illustration

*1

Component without harness connected

(Front Seat Outer Belt Assembly LH)

(c) Reconnect the front seat outer belt assembly LH connector.

NG

REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH

OK

2.

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

(a) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

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

(b) Disconnect the K5 front seat outer belt assembly LH connector.

(c) Disconnect the D84 seat belt control ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K5-1 - Body ground

Always

1 MΩ or higher

K5-2 - Body ground

Always

1 MΩ or higher

K5-1 - K5-2

Always

1 MΩ or higher

Text in Illustration

*1

Front view of wire harness connector

(to Front Seat Outer Belt Assembly LH)

(e) Reconnect the front seat outer belt assembly LH and seat belt control ECU connectors.

(f) Connect the cable to the negative (-) battery terminal.

OK

REPLACE SEAT BELT CONTROL ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR