Toyota Sienna Service Manual: Passenger Airbag ON/OFF Indicator Circuit
Malfunction
DTC B1152/28 Passenger Airbag ON/OFF Indicator Circuit
Malfunction
DESCRIPTION
The passenger airbag ON/OFF indicator 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.
DTC No. |
DTC Detecting Condition |
Trouble Area |
B1152/28 |
- The center airbag sensor assembly 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 assembly malfunction
|
- Air conditioning control assembly (Passenger
airbag ON/OFF indicator)
- Center airbag sensor assembly
- Instrument panel wire
|
WIRING DIAGRAM
![WIRING DIAGRAM](images/books/424/43/index.81.jpg)
INSPECTION PROCEDURE
1 CHECK PASSENGER AIRBAG ON/OFF INDICATOR OPERATION
- Turn the ignition switch to the ON position.
- Check the passenger airbag ON/OFF indicator
operation.
HINT:
Refer to the normal condition of the passenger airbag
ON/OFF indicator (
![CHECK PASSENGER AIRBAG ON/OFF INDICATOR OPERATION](images/books/424/43/index.82.jpg)
Result
![Result](images/books/424/43/index.83.jpg)
Go to step 10
![](images/books/424/43/index.85.gif)
2 CHECK CONNECTION OF CONNECTORS
- Turn the ignition switch to the LOCK position.
- Disconnect the negative (-) terminal cable from the
battery, and wait for at least 90 seconds.
- Check that the connectors are properly connected to the
center airbag sensor assembly and the air conditioning
control assembly.
OK:
The connectors are connected.
CONNECT CONNECTORS
![](images/books/424/44/index.1.gif)
3 CHECK CONNECTORS
- Disconnect the connectors from the center airbag sensor
assembly and the air conditioning control assembly.
- Check that the connectors (on the center airbag sensor
assembly side and the air conditioning control assembly
side) are not damaged.
OK:
The connectors are not deformed or damaged.
REPAIR OR REPLACE INSTRUMENT
PANEL
WIRE
![](images/books/424/44/index.3.gif)
4 CHECK PASSENGER AIRBAG ON/OFF INDICATOR
![](images/books/424/44/index.4.gif)
- Connect the connector to the center airbag sensor
assembly.
- Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
- Turn the ignition switch to the ON position.
- 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
![](images/books/424/44/index.6.gif)
5 CHECK CENTER AIRBAG SENSOR ASSEMBLY
![](images/books/424/44/index.7.jpg)
- Turn the ignition switch to the LOCK position.
- Disconnect the negative (-) terminal cable from the
battery, and wait for at least 90 seconds.
- Connect the connector to the air conditioning control
assembly.
- Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
- Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
- Clear the DTCs stored in memory (5).
- Turn the ignition switch to the LOCK position.
- Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
- Check the DTCs (5).
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
![](images/books/424/44/index.9.gif)
USE SIMULATION METHOD TO CHECK
6 CHECK INSTRUMENT PANEL WIRE (OPEN)
![CHECK INSTRUMENT PANEL WIRE (OPEN)](images/books/424/44/index.10.jpg)
- Turn the ignition switch to the LOCK position.
- Disconnect the negative (-) terminal cable from the
battery, and wait for at least 90 seconds.
- Disconnect the connector from the center airbag sensor
assembly.
- Using a service wire, connect A21-1 (P-AB) and A21-25
(PAON) of connector "B".
NOTICE:
Do not forcibly insert a service wire into the
terminals of the connector when connecting.
- Measure the resistance according to the value(s) in the
table below.
Automatic air conditioning:
Standard resistance
![Automatic air conditioning](images/books/424/44/index.11.jpg)
Manual air conditioning:
Standard resistance
![Manual air conditioning](images/books/424/44/index.12.jpg)
REPAIR OR REPLACE INSTRUMENT
PANEL
WIRE
![](images/books/424/44/index.14.gif)
7 CHECK INSTRUMENT PANEL WIRE (SHORT)
![CHECK INSTRUMENT PANEL WIRE (SHORT)](images/books/424/44/index.15.jpg)
- Disconnect the service wire from connector "B".
- Measure the resistance according to the value(s) in the
table below.
Automatic air conditioning:
Standard resistance
![Automatic air conditioning](images/books/424/44/index.16.jpg)
Manual air conditioning:
Standard resistance
![Manual air conditioning](images/books/424/44/index.17.jpg)
REPAIR OR REPLACE INSTRUMENT
PANEL
WIRE
![](images/books/424/44/index.19.gif)
8 CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)
![CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)](images/books/424/44/index.20.jpg)
- Measure the resistance according to the value(s) in the
table below.
Automatic air conditioning:
Standard resistance
![Automatic air conditioning](images/books/424/44/index.21.jpg)
Manual air conditioning:
Standard resistance
![Manual air conditioning](images/books/424/44/index.22.jpg)
REPAIR OR REPLACE INSTRUMENT
PANEL
WIRE
![](images/books/424/44/index.24.gif)
9 CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)
- Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
- Turn the ignition switch to the ON position.
- Measure the voltage according to the value(s) in the
table below.
Automatic air conditioning:
Standard voltage
![Automatic air conditioning](images/books/424/44/index.25.jpg)
Manual air conditioning:
Standard voltage
![Manual air conditioning](images/books/424/44/index.26.jpg)
REPAIR OR REPLACE INSTRUMENT
PANEL
WIRE
![](images/books/424/44/index.28.gif)
REPLACE AIR CONDITIONING CONTROL ASSEMBLY
10 CHECK CONNECTION OF CONNECTORS
![CHECK CONNECTION OF CONNECTORS](images/books/424/44/index.29.jpg)
- Turn the ignition switch to the LOCK position.
- Disconnect the negative (-) terminal cable from the
battery, and wait for at least 90 seconds.
- Check that the connectors are properly connected to the
center airbag sensor assembly and the air conditioning
control assembly.
OK:
The connectors are connected.
CONNECT CONNECTORS
![](images/books/424/44/index.31.gif)
11 CHECK CONNECTORS
- Disconnect the connectors from the center airbag sensor
assembly and the air conditioning control assembly.
- Check that the connectors (on the center airbag sensor
assembly side and the air conditioning control assembly
side) are not damaged.
OK:
The connectors are not deformed or damaged.
REPAIR OR REPLACE INSTRUMENT
PANEL
WIRE
![](images/books/424/44/index.33.gif)
12 CHECK INSTRUMENT PANEL WIRE (OPEN)
![CHECK INSTRUMENT PANEL WIRE (OPEN)](images/books/424/44/index.34.jpg)
- Using a service wire, connect A21-1 (ABON) and A21-25
(ABOF) of connector "B".
- Measure the resistance according to the value(s) in the
table below.
Automatic air conditioning:
Standard resistance
![Automatic air conditioning](images/books/424/44/index.35.jpg)
Manual air conditioning:
Standard resistance
![Manual air conditioning](images/books/424/44/index.36.jpg)
REPAIR OR REPLACE INSTRUMENT
PANEL
WIRE
![](images/books/424/44/index.38.gif)
13 CHECK INSTRUMENT PANEL WIRE (SHORT)
![CHECK INSTRUMENT PANEL WIRE (SHORT)](images/books/424/44/index.39.jpg)
- Disconnect the service wire from connector "B".
- Measure the resistance according to the value(s) in the
table below.
Automatic air conditioning:
Standard resistance
![Automatic air conditioning](images/books/424/44/index.40.jpg)
Manual air conditioning:
Standard resistance
![Manual air conditioning](images/books/424/44/index.41.jpg)
REPAIR OR REPLACE INSTRUMENT
PANEL
WIRE
![](images/books/424/44/index.43.gif)
14 CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)
![CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)](images/books/424/44/index.44.jpg)
- Measure the resistance according to the value(s) in the
table below.
Automatic air conditioning:
Standard resistance
![Automatic air conditioning](images/books/424/44/index.45.jpg)
Manual air conditioning:
Standard resistance
![Manual air conditioning](images/books/424/44/index.46.jpg)
REPAIR OR REPLACE INSTRUMENT
PANEL
WIRE
![](images/books/424/44/index.48.gif)
15 CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)
![CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)](images/books/424/44/index.49.jpg)
- Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
- Turn the ignition switch to the ON position.
- Measure the voltage according to the value(s) in the
table below.
Automatic air conditioning:
Standard voltage
![Automatic air conditioning](images/books/424/44/index.50.jpg)
Manual air conditioning:
Standard voltage
![Manual air conditioning](images/books/424/44/index.51.jpg)
REPAIR OR REPLACE INSTRUMENT
PANEL
WIRE
![](images/books/424/44/index.53.gif)
16 CHECK WIRE HARNESS (POWER SOURCE)
![CHECK WIRE HARNESS (POWER SOURCE)](images/books/424/44/index.54.jpg)
- Turn the ignition switch to the LOCK position.
- Disconnect the negative (-) terminal cable from the
battery, and wait for at least 90 seconds.
- Connect the connector to the center airbag sensor
assembly.
- Turn the ignition switch to the ON position.
- Measure the voltage and resistance according to the
value(s) in the table below.
Automatic air conditioning:
Standard voltage
![Automatic air conditioning](images/books/424/44/index.55.jpg)
Manual air conditioning:
Standard voltage
![Manual air conditioning](images/books/424/44/index.56.jpg)
REPAIR OR REPLACE POWER
SOURCE
CIRCUIT
![](images/books/424/44/index.58.gif)
17 CHECK PASSENGER AIRBAG ON/OFF INDICATOR
![CHECK PASSENGER AIRBAG ON/OFF INDICATOR](images/books/424/44/index.59.jpg)
- Turn the ignition switch to the LOCK position.
- Disconnect the negative (-) terminal cable from the
battery, and wait for at least 90 seconds.
- Connect the connector to the air conditioning control
assembly.
- Disconnect the connector from center airbag sensor
assembly.
- Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
- Turn the ignition switch to the ON position.
- Check the passenger airbag ON/OFF indicator condition.
Result
![Result](images/books/424/44/index.60.jpg)
REPLACE AIR CONDITIONING
CONTROL
ASSEMBLY
![](images/books/424/44/index.61.gif)
18 CHECK CENTER AIRBAG SENSOR ASSEMBLY
![CHECK CENTER AIRBAG SENSOR ASSEMBLY](images/books/424/44/index.62.jpg)
- Turn the ignition switch to the LOCK position.
- Disconnect the negative (-) terminal cable from the
battery, and wait for at least 90 seconds.
- Connect the connector to the center airbag sensor
assembly.
- Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
- Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
- Clear the DTCs stored in memory (5).
- Turn the ignition switch to the LOCK position.
- Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
- Check the DTCs (5).
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
![](images/books/424/44/index.64.gif)
USE SIMULATION METHOD TO CHECK
DTC B1150/23 Occupant Classification System Malfunction
DESCRIPTION
The occupant classification system circuit consists of the center airbag
sensor assembly and the occupant
classification ECU.
...
DTC B1153/25 Seat Position Airbag Sensor Circuit Malfunction
DESCRIPTION
The seat position airbag sensor circuit consists of the center airbag sensor
assembly and the seat
position airbag sensor. ...
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DESCRIPTION
These codes are stored in the memory when a key that does not have a
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communication between the key and transponder key ECU is impossible.
DTC No ...
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WIRING DIAGRAM
Refer to ABS Warning Light Remains ON (See page BC-141).
INSPECTION PROCEDURE
1 CHECK ABS WARNING LIGHT
(a) Disconnect the skid control ECU connector.
(b) Turn the ignition switch to the ON position.
(c) Check that the ABS warning light comes on.
OK:
ABS warning light come ...
Transmitter ID not Registered
DTC C2171/71 Transmitter ID not Registered
DESCRIPTION
The IDs of each tire pressure warning valve and transmitters are registered
to the tire pressure warning
ECU.
When the IDs have never been registered, a DTC is output.
INSPECTION PROCEDURE
NOTICE:
When replacing the tire pressu ...