Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM0000017PP005X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B0105/53; Short in Front Passenger Side Squib Circuit; 2007 MY LX470 [08/2006 -        ]

DTC

B0105/53

Short in Front Passenger Side Squib Circuit

DESCRIPTION

The front passenger side squib circuit consists of the center airbag sensor and the front passenger airbag.

The circuit instructs the SRS to deploy when deployment conditions are met.

DTC B0105/53 is recorded when a short is detected in the front passenger side squib circuit.

DTC No.

DTC Detection Condition

Trouble Area

B0105/53
  • Short in front passenger side squib circuit
  • Front passenger side squib malfunction
  • Center airbag sensor assembly malfunction
  • Front passenger airbag assembly (front passenger side squib)
  • Center airbag sensor assembly
  • Dash wire

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

CHECK CONNECTOR

(a) Turn the ignition switch to LOCK.

(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

(c) Disconnect the connectors from the front passenger airbag.

(d) Check that the dash wire connectors (on the front passenger airbag side) are not damaged.

OK:

The lock button is not damaged, or the claw of the lock is not deformed or damaged.

NG

REPAIR OR REPLACE DASH WIRE

OK

2.

CHECK DASH WIRE (FRONT PASSENGER SIDE SQUIB CIRCUIT)

(a) Disconnect the center airbag sensor connector.

(b) Release the airbag activation prevention mechanism built in the connector of the dash wire on the center airbag sensor side 2007 MY LX470 [08/2006 -        ]; SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: DIAGNOSIS SYSTEM .

(c) Measure the resistance between P+ and P- of the A28 dash wire connector on the front passenger airbag (front passenger side squib).

Standard resistance:

1 MΩ or higher

NG

REPAIR OR REPLACE DASH WIRE

OK

3.

CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Connect the connector to the center airbag sensor.

(b) Connect the negative (-) terminal cable to the battery, and wait at least for 2 seconds.

(c) Turn the ignition switch to ON, and wait at least for 10 seconds.

(d) Clear the DTC stored in memory 2007 MY LX470 [08/2006 -        ]; SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: DTC CHECK / CLEAR .

(e) Turn the ignition switch to LOCK, and wait at least for 10 seconds.

(f) Turn the ignition switch to ON, and wait at least for 10 seconds.

(g) Check the DTC 2007 MY LX470 [08/2006 -        ]; SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: DTC CHECK / CLEAR .

OK:

DTC B0105/53 is not output.

HINT:

Codes other than code B0105/53 may be output at this time, but they are not relevant to this check.

NG

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

OK

4.

CHECK FRONT PASSENGER SIDE SQUIB

(a) Turn the ignition switch to LOCK.

(b) Disconnect the negative (-) terminal cable from the battery, and wait at least for 90 seconds.

(c) Connect the front passenger airbag (front passenger side squib) connector.

(d) Connect the negative (-) terminal cable to the battery, and wait at least for 2 seconds.

(e) Turn the ignition switch to ON, and wait at least for 10 seconds.

(f) Clear the DTC stored in memory 2007 MY LX470 [08/2006 -        ]; SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: DTC CHECK / CLEAR .

(g) Turn the ignition switch to LOCK, and wait at least for 10 seconds.

(h) Turn the ignition switch to ON, and wait at least for 10 seconds.

(i) Check the DTC 2007 MY LX470 [08/2006 -        ]; SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: DTC CHECK / CLEAR .

OK:

DTC B0105/53 is not output.

HINT:

Codes other than code B0105/53 may be output at this time, but they are not relevant to this check.

NG

REPLACE FRONT PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB)

OK

USE SIMULATION METHOD TO CHECK