Last Modified: 4-30-2014 6.6 C Doc ID: RM0000017QS001X
Model Year: 2006 Model: LX470 Prod Date Range: [05/2005 -           ]
Title: SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1141/33; Side Airbag Sensor Assembly LH Malfunction; 2006 MY LX470 [05/2005 -        ]

DTC

B1141/33

Side Airbag Sensor Assembly LH Malfunction

DESCRIPTION

The side and curtain shield airbag sensor LH consists of the safing sensor, diagnosis circuit and lateral deceleration sensor, etc.

It receives signals from the lateral deceleration sensor, judges whether or not the SRS must be activated, and detects diagnosis system malfunction.

DTC B1141/33 is recorded when occurrence of a malfunction in the side and curtain shield airbag sensor LH is detected.

DTC No.

DTC Detection Condition

Trouble Area

B1141/33

Side and curtain shield airbag sensor assembly LH malfunction
  • Side and curtain shield airbag sensor assembly LH
  • No. 1 floor wire
  • Center airbag sensor assembly

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

CHECK FOR DTC

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

(b) Clear the DTC stored in memory 2006 MY LX470 [05/2005 -        ]; SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: DTC CHECK / CLEAR .

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

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

(e) Check the DTC 2006 MY LX470 [05/2005 -        ]; SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: DTC CHECK / CLEAR .

OK:

DTC B1141/33 is output.

HINT:

B0119 codes other than code B1141/33 may be output at this time, but they are not relevant to this check.
NG

USE SIMULATION METHOD TO CHECK

OK

2.

CHECK CONNECTION OF 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) Check that the connectors are properly connected to the center airbag sensor and the side airbag sensor LH.

OK:

The connectors are connected.

NG

CONNECT CONNECTOR

OK

3.

CHECK NO. 1 FLOOR WIRE

(a) Using a service wire, connect VUPL and ESL of the S22 No. 1 floor wire connector on the side and curtain shield airbag sensor LH side.

(b) Measure the resistance between VUPL and ESL of the C31 No. 1 floor wire connector on the center airbag sensor side.

Standard resistance:

Below 1 Ω
NG

REPAIR OR REPLACE NO. 1 FLOOR WIRE

OK

4.

CHECK NO. 1 FLOOR WIRE

(a) Using a service wire, connect SSL+ and SSL- of the S22 No. 1 floor wire connector on the side and curtain shield airbag sensor LH side.

(b) Measure the resistance between SSL+ and SSL- of the C31 No. 1 floor wire connector on the center airbag sensor side.

Standard resistance:

Below 1 Ω
NG

REPAIR OR REPLACE NO. 1 FLOOR WIRE

OK

5.

CHECK NO. 1 FLOOR WIRE (TO GROUND)

(a) Measure the resistance between the body ground and each of VUPL, SSL+ and SSL- of the C31 No. 1 floor wire connector on the center airbag sensor side.

Standard resistance:

10 kΩ or higher
NG

REPAIR OR REPLACE NO. 1 FLOOR WIRE

OK

6.

CHECK NO. 1 FLOOR WIRE (TO B+)

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

(b) Turn the ignition switch to ON.

(c) Measure the voltage between the body ground and each of VUPL, SSL+, SSL- and ESL of the C31 No. 1 floor wire connector on the center airbag sensor side.

Standard voltage:

Below 1V
NG

REPAIR OR REPLACE NO. 1 FLOOR WIRE

OK

7.

CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Turn the ignition switch to LOCK.

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

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

(d) Change the side and curtain shield airbag sensor RH position with LH position.

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

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

(g) Clear the DTC stored in memory 2006 MY LX470 [05/2005 -        ]; SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: DTC CHECK / CLEAR .

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

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

(j) Check the DTC 2006 MY LX470 [05/2005 -        ]; SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: DTC CHECK / CLEAR .

OK:

DTC B1141/33 and B1140/32 are not output.

HINT:

Codes other than code B1141/33 or B1140/32 may be output at this time, but they are not relevant to this check.
NG

REPLACE CENTER AIRBAG SENSOR ASSEMBLY (DTC B1141/33 IS OUTPUT)

NG

REPLACE SIDE AND CURTAIN SHIELD AIRBAG SENSOR ASSEMBLY LH (DTC B1140/32 IS OUTPUT)

OK

USE SIMULATION METHOD TO CHECK