B1152

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1152/28: Passenger Airbag ON/OFF Indicator Circuit Malfunction

DTC B1152/28 - Passenger Airbag ON/OFF Indicator Circuit Malfunction

DESCRIPTION

The passenger airbag ON/OFF indicator light circuit consists of the center airbag sensor assembly and passenger airbag ON/OFF indicator.
This circuit indicates the operation condition of the front passenger airbag, the front seat side airbag RH and front seat belt pretensioner RH.
DTC B1152/28 is recorded when a malfunction is detected in the passenger airbag ON/OFF indicator circuit.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK PASSENGER AIRBAG ON/OFF INDICATOR OPERATION
(a) Turn the ignition switch to the ON position.
(b) Check the passenger airbag ON/OFF indicator operation.
HINT: Refer to the normal condition of the passenger airbag ON/OFF indicator. Diagnosis System

Result:

B -- CHECK CONNECTION OF CONNECTORS
A -- Continue to next step.
2. CHECK CONNECTION OF CONNECTORS
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) without LEXUS Navigation System:
Check that the connectors are properly connected to the center airbag sensor assembly and the center cluster integration switch assembly.
(d) with LEXUS Navigation System:
Check that the connectors are properly connected to the center airbag sensor assembly and the multi-display assembly.
OK:
The connectors are properly connected.
NG -- CONNECT CONNECTORS PROPERLY
OK -- Continue to next step.
3. CHECK CONNECTORS
(a) without LEXUS Navigation System:
(1) Disconnect the connectors from the center airbag sensor assembly and the center cluster integration switch assembly.
(2) Check that the connectors (on the center airbag sensor assembly side and the center cluster integration switch assembly side) are not damaged.
OK:
The connectors are not deformed or damaged.
(b) with LEXUS Navigation System:
(1) Disconnect the connectors from the center airbag sensor assembly and the multi-display assembly.
(2) Check that the connectors (on the center airbag sensor assembly side and the multi-display assembly side) are not damaged.
OK:
The connectors are not deformed or damaged.
NG -- REPAIR OR REPLACE WIRE HARNESS
OK -- Continue to next step.
4. CHECK PASSENGER AIRBAG ON/OFF INDICATOR

(a) without LEXUS Navigation System:
Connect the connector to the center cluster integration switch assembly.
(b) with LEXUS Navigation System:
Connect the connector to the multi-display assembly.
(c) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(d) Turn the ignition switch to the ON position.
(e) Check the passenger airbag ON/OFF indicator operation.
OK:
The passenger airbag ON/OFF indicator ("ON" and "OFF") does not come on.
NG -- CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (OPEN)
OK -- Continue to next step.
5. CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Connect the connector to the center airbag sensor assembly.
(d) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(e) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(f) Clear the DTCs stored in the memory .
(g) Turn the ignition switch to the LOCK position.
(h) Turn the ignition switch to the ON position, 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.

NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY
OK -- USE SIMULATION METHOD TO CHECK
6. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (OPEN)

(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) without LEXUS Navigation System:
Disconnect the connector from the center cluster integration switch assembly.
(d) with LEXUS Navigation System:
Disconnect the connector from the multi-display assembly.
(e) Using a service wire, connect terminals 1 (P-AB) and 25 (PAON) of connector B.
NOTE: Do not forcibly insert a service wire into the terminals of the connector when connecting.
(f) Measure the resistance according to the value(s) in the table below.
Standard resistance:
without LEXUS Navigation System

with LEXUS Navigation System

NG -- CHECK INSTRUMENT PANEL WIRE (OPEN)
OK -- Continue to next step.
7. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT)

(a) Disconnect the service wire from connector B.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
without LEXUS Navigation System

with LEXUS Navigation System

NG -- CHECK INSTRUMENT PANEL WIRE (SHORT)
OK -- Continue to next step.
8. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT TO GROUND)

(a) Measure the resistance according to the value(s) in the table below.
Standard resistance:
without LEXUS Navigation System

with LEXUS Navigation System

NG -- CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)
OK -- Continue to next step.
9. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT TO B+)

(a) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:
without LEXUS Navigation System

with LEXUS Navigation System

Result:

C -- REPLACE MULTI-DISPLAY ASSEMBLY
B -- REPLACE CENTER CLUSTER INTEGRATION SWITCH ASSEMBLY
A -- Continue to next step.
10. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)

(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect the instrument panel wire connector from the instrument panel wire No. 2.
(d) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(e) Turn the ignition switch to the ON position.
(f) Measure the voltage according to the value(s) in the table below.
Standard voltage:

NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE NO. 2
11. CHECK INSTRUMENT PANEL WIRE (SHORT)

(a) Disconnect the instrument panel wire connector from the instrument panel wire No. 2.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE NO. 2
12. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

(a) Disconnect the instrument panel wire connector from the instrument panel wire No. 2.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE NO. 2
13. CHECK INSTRUMENT PANEL WIRE (OPEN)

(a) Disconnect the instrument panel wire connector from the instrument panel wire No. 2.
HINT: The service wire has already been inserted into connector B.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE NO. 2
14. CHECK CONNECTION OF CONNECTORS
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) without LEXUS Navigation System:
Check that the connectors are properly connected to the center airbag sensor assembly and the center cluster integration switch assembly.
(d) with LEXUS Navigation System:
Check that the connectors are properly connected to the center airbag sensor assembly and the multi-display assembly.
OK:
The connectors are properly connected.
NG -- CONNECT CONNECTORS PROPERLY
OK -- Continue to next step.
15. CHECK CONNECTORS
(a) without LEXUS Navigation System:
(1) Disconnect the connectors from the center airbag sensor assembly and the center cluster integration switch assembly.
(2) Check that the connectors (on the center airbag sensor assembly side and the center cluster integration switch assembly side) are not damaged.
OK:
The connectors are not deformed or damaged.
(b) with LEXUS Navigation System:
(1) Disconnect the connectors from the center airbag sensor assembly and the multi-display assembly.
(2) Check that the connectors (on the center airbag sensor assembly side and the multi-display assembly side) are not damaged.
OK:
The connectors are not deformed or damaged.
NG -- REPAIR OR REPLACE WIRE HARNESS
OK -- Continue to next step.
16. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (OPEN)

(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) without LEXUS Navigation System:
Disconnect the connector from the center cluster integration switch assembly.
(d) with LEXUS Navigation System:
Disconnect the connector from the multi-display assembly.
(e) Using a service wire, connect terminals 1 (P-AB) and 25 (PAON) of connector B.
CAUTION: Do not forcibly insert a service wire into the terminals of the connector when connecting.
(f) Measure the resistance according to the value(s) in the table below.
Standard resistance:
without LEXUS Navigation System

with LEXUS Navigation System

NG -- CHECK INSTRUMENT PANEL WIRE (OPEN)
OK -- Continue to next step.
17. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT)

(a) Disconnect the service wire from connector B.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
without LEXUS Navigation System

with LEXUS Navigation System

NG -- CHECK INSTRUMENT PANEL WIRE (SHORT)
OK -- Continue to next step.
18. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT TO GROUND)

(a) Measure the resistance according to the value(s) in the table below.
Standard resistance:
without LEXUS Navigation System

with LEXUS Navigation System

NG -- CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)
OK -- Continue to next step.
19. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT TO B+)

with LEXUS Navigation System

NG -- CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)
OK -- Continue to next step.
20. CHECK WIRE HARNESS (POWER SOURCE)

(a) Turn the ignition switch to the ON position.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:
without LEXUS Navigation System

with LEXUS Navigation System

(c) Turn the ignition switch to the LOCK position.
(d) Measure the resistance according to the value(s) in the table below.
Standard resistance:
without LEXUS Navigation System

with LEXUS Navigation System

NG -- REPAIR OR REPLACE POWER SOURCE CIRCUIT
OK -- Continue to next step.
21. CHECK PASSENGER AIRBAG ON/OFF INDICATOR

(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) without LEXUS Navigation System:
Connect the connector to the center cluster integration switch assembly.
(d) with LEXUS Navigation System:
Connect the connector to the multi-display assembly.
(e) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(f) Turn the ignition switch to the ON position.
(g) Check the passenger airbag ON/OFF indicator condition.
Indicator condition:

Result:

C -- REPLACE MULTI-DISPLAY ASSEMBLY
B -- REPLACE CENTER CLUSTER INTEGRATION SWITCH ASSEMBLY
A -- Continue to next step.
22. CHECK CENTER AIRBAG SENSOR ASSEMBLY

NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE NO. 2
24. CHECK INSTRUMENT PANEL WIRE (SHORT)

(a) Disconnect the instrument panel wire connector from the instrument panel wire No. 2.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE NO. 2
25. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

(a) Disconnect the instrument panel wire connector from the instrument panel wire No. 2.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE NO. 2
26. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)

NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE NO. 2