SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1140/32; Side Airbag Sensor Assembly RH Circuit Malfunction; 2007 MY LX470 [08/2006

Last Modified: 7-3-2017	6.8:8.0.40	Doc ID: RM0000017QR005X
Model Year Start: 2007	Model: LX470	Prod Date Range: [08/2006 - ]
Title: SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1140/32; Side Airbag Sensor Assembly RH Circuit Malfunction; 2007 MY LX470 [08/2006 - ]

DTC

B1140/32

Side Airbag Sensor Assembly RH Circuit Malfunction

DESCRIPTION

The side and curtain shield airbag sensor RH 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 B1140/32 is recorded when occurrence of a malfunction in the side and curtain shield airbag sensor RH is detected.

DTC No.	DTC Detection Condition	Trouble Area
B1140/32	Side and curtain shield airbag sensor assembly RH malfunction	Side and curtain shield airbag sensor assembly RH Center airbag sensor assembly No. 2 floor wire

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 .

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

(e) Check the DTC .

OK:

DTC B1140/32 is output.

HINT:

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

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

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.

OK:

The connectors are connected.

CONNECT CONNECTOR

3.	CHECK NO. 2 FLOOR WIRE

(a) Disconnect the connectors from the center airbag sensor and the side airbag sensor RH.

(b) Using a service wire, connect SSR+ and SSR- of the S23 No. 2 floor wire connector on the side and curtain shield airbag sensor RH side.

Standard resistance:

Below 1 Ω

REPAIR OR REPLACE NO. 2 FLOOR WIRE

4.	CHECK NO. 2 FLOOR WIRE

(a) Using a service wire, connect VUPR and ESR of the S23 No. 2 floor wire connector on the side and curtain shield airbag sensor RH side.

(b) Measure the resistance between VUPR and ESR of the C33 No. 2 floor wire connector on the center airbag sensor side.

Standard resistance:

Below 1 Ω

REPAIR OR REPLACE NO. 2 FLOOR WIRE

5.	CHECK NO. 2 FLOOR WIRE (TO GROUND)

(a) Measure the resistance between the body ground and each of VUPR, SSR+ and SSR- of the No. 2 floor wire connector on the center airbag sensor side.

Standard resistance:

1 MΩ or higher

REPAIR OR REPLACE NO. 2 FLOOR WIRE

6.	CHECK NO. 2 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 VUPR, SSR+, SSR- and ESR of the C33 No. 2 floor wire connector on the center airbag sensor side.

Standard voltage:

Below 1 V

REPAIR OR REPLACE NO. 2 FLOOR WIRE

7.	CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Turn the ignition switch to LOCK.

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

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

(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 .

OK:

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

HINT:

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

REPLACE CENTER AIRBAG SENSOR ASSEMBLY (DTC B1140/32 IS OUTPUT)

REPLACE SIDE AND CURTAIN SHIELD AIRBAG SENSOR ASSEMBLY RH (DTC B1141/33 IS OUTPUT)

USE SIMULATION METHOD TO CHECK