Home › Vehicle Interior › Supplemental Restraint Systems › PRE-COLLISION: PRE-COLLISION SYSTEM
Last Modified: 11-27-2007 1.6 C
Service Category: Vehicle Interior Section: Supplemental Restraint Systems
Model Year: 2008 Model: LX570 Doc ID: RM000000X7M00UX
Title: PRE-COLLISION: PRE-COLLISION SYSTEM: DESCRIPTION (2008 LX570)

DTC

B2000

Short to B+ in Seat Belt Motor RH Circuit

DTC

B2005

Short to B+ in Seat Belt Motor LH Circuit

DESCRIPTION

The seat belt control ECU receives information from the master cylinder solenoid (skid control ECU) via the CAN communication line and tightens the seat belt by operating the motor in the front seat outer belt assembly RH or LH.

DTC Code

DTC Detection Condition

Trouble Area

B2000
  • Short to B+ in the seat belt motor RH circuit continues for 1 second or more.
  • Short in the seat belt motor RH circuit.
  • Front seat outer belt assembly RH
  • Harness or connector
  • Seat belt control ECU

B2005
  • Short to B+ in the seat belt motor LH circuit continues for 1 second or more.
  • Short in the seat belt motor LH circuit.
  • Front seat outer belt assembly LH
  • Harness or connector
  • Seat belt control ECU

WIRING DIAGRAM

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 deploy the pretensioner.

PROCEDURE

1.

CHECK SEAT BELT CONTROL ECU

(a) Disconnect the E41 seat belt control ECU connector.

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

Standard Voltage:

for LH

Tester Connection

Switch Condition

Specified Condition

E41-3 (MOL+) - Body ground

Engine switch on (IG)

Below 1 V

E41-4 (MOL-) - Body ground

for RH

Tester Connection

Switch Condition

Specified Condition

E41-1 (MOR-) - Body ground

Engine switch on (IG)

Below 1 V

E41-2 (MOR+) - Body ground
OK

2.

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

(a) Disconnect the E41 seat belt control ECU connector.

(b) Disconnect the K11*1 or L5*2 front seat outer belt connector.

*1: for LH

*2: for RH

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage :

for LH

Tester Connection

Switch Condition

Specified Condition

K11-1 (MOL+) - Body ground

Engine switch on (IG)

Below 1 V

K11-2 (MOL-) - Body ground

for RH

Tester Connection

Switch Condition

Specified Condition

L5-1 (MOR+) - Body ground

Engine switch on (IG)

Below 1 V

L5-2 (MOR-) - Body ground

Result

Result

Proceed to

OK

(for DTC B2000)

A

OK

(for DTC B2005)

B

NG

C
A