SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1152/28; Passenger Airbag ON/OFF Indicator Circuit Malfunction; 2007 MY LX470 [08/2006

Last Modified: 7-3-2017	6.8:8.0.40	Doc ID: RM00000125800FX
Model Year Start: 2007	Model: LX470	Prod Date Range: [08/2006 - ]
Title: SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1152/28; Passenger Airbag ON/OFF Indicator Circuit Malfunction; 2007 MY LX470 [08/2006 - ]

DTC

B1152/28

Passenger Airbag ON/OFF Indicator Circuit Malfunction

DESCRIPTION

The passenger airbag ON / OFF indicator circuit consists of the center airbag sensor and passenger airbag ON / OFF indicator. This circuit indicates the operation condition of the front passenger airbag, front seat side airbag RH and front seat outer belt RH.

DTC B1152/28 is recorded when a malfunction is detected in the passenger airbag ON / OFF indicator circuit.

DTC No.	DTC Detection Condition	Trouble Area
B1152/28	When one of following conditions is met: The center airbag sensor receives a line short signal, open signal, short to ground signal or B+ short signal in the passenger airbag ON / OFF indicator circuit for 2 seconds. Passenger airbag ON / OFF indicator malfunction Center airbag sensor malfunction	Air conditioning control assembly1 (Passenger airbag ON / OFF indicator) Center cluster integration switch2 (Passenger airbag ON / OFF indicator) Center airbag sensor assembly Instrument panel wire

HINT:

*1: w/o Navigation System

*2: w/ Navigation System

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.	CHECK PASSENGER AIRBAG ON / OFF INDICATOR OPERATION

(a) Turn the ignition switch ON.

(b) Check the passenger airbag ON / OFF indicator operation.

HINT:

Refer to the normal condition of the passenger airbag ON / OFF indicator .

Result

ON / OFF Indicator Illumination	Proceed to
Always ON	A
OFF	B

GO TO STEP 10

2.	CHECK CONNECTION OF CONNECTOR

(a) Turn the ignition switch OFF.

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

(c) Check that the connectors are properly connected to the center airbag sensor and the passenger airbag ON / OFF indicator.

OK:

The connectors are connected.

CONNECT CONNECTOR

3.	CHECK CONNECTOR

(a) Disconnect the connectors from the center airbag sensor and the air conditioning control.

(b) Check that the connectors (on the center airbag sensor side and the passenger airbag ON / OFF indicator side) are not damaged.

OK:

The connectors are not deformed or damaged.

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

4.	CHECK PASSENGER AIRBAG ON / OFF INDICATOR

(a) Connect the connector to the passenger airbag ON / OFF indicator.

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

(d) Check the passenger airbag ON / OFF indicator operation.

OK:

The passenger airbag ON / OFF indicator ("ON" and "OFF") does not come on.

GO TO STEP 6

5.	CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Turn the ignition switch OFF.

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

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

(e) Turn the ignition switch ON, and wait for at least 60 seconds.

(f) Clear the DTCs stored in memory .

(g) Turn the ignition switch OFF.

(h) Turn the ignition switch ON, and wait for at least 60 seconds.

(i) Check the DTCs .

OK:

DTC B1152/28 is not output.

HINT:

Codes other than code B1152/28 may be output at this time, but they are not related to this check.

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

USE SIMULATION METHOD TO CHECK

6.	CHECK PASSENGER AIRBAG ON / OFF INDICATOR CIRCUIT (OPEN)

(a) Turn the ignition switch OFF.

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

(d) Using a service wire, connect terminals C32-1 (OFF) and C32-25 (PAON) of connector "B".

(e) Measure the resistance of the wire harness side connector.

Standard resistance:

w/ Navigation system

w/o Navigation system

Tester Connection	Specified Condition
C34-9 (PAON) - C34-21 (OFF)	Below 1 Ω

Tester Connection	Specified Condition
A47-34 (PAON) - A47-35 (OFF)	Below 1 Ω

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

7.	CHECK PASSENGER AIRBAG ON / OFF INDICATOR CIRCUIT (SHORT)

(a) Disconnect the service wire from connector "B".

(b) Measure the resistance of the wire harness side connector.

Standard resistance:

w/ Navigation system

w/o Navigation system

Tester Connection	Specified Condition
C34-9 (PAON) - C34-21 (OFF)	1 MΩ or higher

Tester Connection	Specified Condition
A47-34 (PAON) - A47-35 (OFF)	1 MΩ or higher

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

8.	CHECK PASSENGER AIRBAG ON / OFF INDICATOR CIRCUIT (SHORT TO GROUND)

(a) Measure the resistance of the wire harness side connector.

Standard resistance:

w/ Navigation system

w/o Navigation system

Tester Connection	Specified Condition
C34-9 (PAON) - Body ground	1 MΩ or higher
C34-21 (OFF) - Body ground	1 MΩ or higher

Tester Connection	Specified Condition
A47-34 (PAON) - Body ground	1 MΩ or higher
A47-35 (OFF) - Body ground	1 MΩ or higher

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

9.	CHECK PASSENGER AIRBAG ON / OFF INDICATOR CIRCUIT (SHORT TO B+)

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

(b) Turn the ignition switch ON.

Standard voltage:

w/ Navigation system

w/o Navigation system

Tester Connection	Specified Condition
C34-9 (PAON) - Body ground	Below 1 V
C34-21 (OFF) - Body ground	Below 1 V

Tester Connection	Specified Condition
A47-34 (PAON) - Body ground	Below 1 V
A47-35 (OFF) - Body ground	Below 1 V

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

REPLACE AIR CONDITIONING CONTROL SUB-ASSEMBLY

10.	CHECK CONNECTION OF CONNECTOR

(a) Turn the ignition switch OFF.

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

(c) Check that the connectors are properly connected to the center airbag sensor and the passenger airbag ON / OFF indicator.

OK:

The connectors are connected.

CONNECT CONNECTOR

11.	CHECK CONNECTOR

(a) Disconnect the connectors from the center airbag sensor and the passenger airbag ON / OFF indicator.

(b) Check that the connectors (on the center airbag sensor side and the passenger airbag ON / OFF indicator side) are not damaged.

OK:

The connectors are not deformed or damaged.

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

12.	CHECK PASSENGER AIRBAG ON / OFF INDICATOR CIRCUIT (OPEN)

(a) Turn the ignition switch OFF.

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

(d) Using a service wire, connect terminal C32-1 (P-AB) and C32-25 (PAON) of connector "B".

(e) Measure the resistance of the wire harness side connector.

Standard resistance:

w/ Navigation system

w/o Navigation system

Tester Connection	Specified Condition
C34-9 (PAON) - C34-21 (OFF)	Below 1 Ω

Tester Connection	Specified Condition
A47-34 (PAON) - A47-35 (OFF)	Below 1 Ω

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

13.	CHECK PASSENGER AIRBAG ON / OFF INDICATOR CIRCUIT (SHORT)

(a) Disconnect the SST from connector "B".

(b) Measure the resistance of the wire harness side connector.

Standard resistance:

w/ Navigation system

w/o Navigation system

Tester Connection	Specified Condition
C34-9 (PAON) - C34-21 (OFF)	1 MΩ or higher

Tester Connection	Specified Condition
A47-34 (PAON) - A47-35 (OFF)	1 MΩ or higher

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

14.	CHECK PASSENGER AIRBAG ON / OFF INDICATOR CIRCUIT (SHORT TO GROUND)

(a) Measure the resistance of the wire harness side connector.

Standard resistance:

w/ Navigation system

w/o Navigation system

Tester Connection	Specified Condition
C34-9 (PAON) - Body ground	1 MΩ or higher
C34-21 (OFF) - Body ground	1 MΩ or higher

Tester Connection	Specified Condition
A47-34 (PAON) - Body ground	1 MΩ or higher
A47-35 (OFF) - Body ground	1 MΩ or higher

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

15.	CHECK PASSENGER AIRBAG ON / OFF INDICATOR CIRCUIT (SHORT TO B+)

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

(b) Turn the ignition switch ON.

Standard voltage:

w/ Navigation system

w/o Navigation system

Tester Connection	Specified Condition
C34-9 (PAON) - Body ground	Below 1 V
C34-21 (OFF) - Body ground	Below 1 V

Tester Connection	Specified Condition
A47-34 (PAON) - Body ground	Below 1 V
A47-35 (OFF) - Body ground	Below 1 V

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

16.	CHECK WIRE HARNESS (POWER SOURCE)

(a) Turn the ignition switch ON.

(b) Measure the voltage and resistance of the wire harness side connector.

Standard voltage:

w/ Navigation system

w/o Navigation system

Tester Connection	Condition	Specified Condition
C34-8 (IG) - Body ground	Ignition switch ON	10 to 14 V
C34-8 (IG) - Body ground	Ignition switch OFF	Below 1 V

Tester Connection	Condition	Specified Condition
A49-22 (IG) - Body ground	Ignition switch ON	10 to 14 V
A49-22 (IG) - Body ground	Ignition switch OFF	Below 1 V

REPAIR OR REPLACE POWER SOURCE CIRCUIT

17.	CHECK PASSENGER AIRBAG ON / OFF INDICATOR

(a) Turn the ignition switch OFF.

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

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

(e) Turn the ignition switch ON.

(f) Check the passenger airbag ON / OFF indicator condition.

OK:

Tester Connection	Passenger Airbag ON / OFF Indicator Condition
C32-25 (PAON) - Body ground	"ON" comes on
C32-1 (P-AB) - Body ground	"OFF" comes on

Result

Result	Proceed to
Result is as specified condition	A
Result is not as specified condition (w/ Navigation system)	B
Result is not as specified condition (w/o Navigation system)	C

REPLACE CENTER CLUSTER INTEGRATION SWITCH ASSEMBLY

REPLACE AIR CONDITIONING CONTROL SUB-ASSEMBLY

18.	CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Turn the ignition switch OFF.

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

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

(e) Turn the ignition switch ON, and wait for at least 60 seconds.

(f) Clear the DTCs stored in memory .

(g) Turn the ignition switch OFF.

(h) Turn the ignition switch ON, and wait for at least 60 seconds.

(i) Check the DTCs .

OK:

DTC B1152/28 is not output.

HINT:

Codes other than code B1152/28 may be output at this time, but they are not related to this check.

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

USE SIMULATION METHOD TO CHECK