Toyota Sienna Quiz
Supplemental restraint system

Passenger Airbag ON/OFF Indicator Circuit Malfunction

In this manual: Supplemental restraint system
Introduction — 55Service specifications — 7Maintenance — 7Engine — 264U151e automatic transaxle — 108Transfer — 19Propeller shaft — 8Drive shaft — 14Differential — 16Axle — 18Suspension — 37Tire and wheel — 54Brake control — 141Parking brake — 16Steering Column — 11Power steering — 18Air conditioning — 106Supplemental restraint system — 146Seat belt — 22Theft deterrent — 14Engine immobiliser — 17Cruise control — 65Lighting — 61Wiper and washer — 13Door lock — 42Meter — 28Audio / visual — 94Navigation — 108Park assist / monitoring — 33Horn — 5Garage door opener — 42GR-FE Engine control system — 126Supplemental restraint system — 147Other system — 14Windshield / windowglass — 43Mirror — 23Instrument panel — 6Seat belt — 22Seat — 92Engine hood / door — 104Exterior — 39Interior — 5Sliding roof — 9Multiplex communication — 18Can communication — 23
62steps
~372min
4/5difficulty
Done 0 of 62

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

INSPECTION PROCEDURE

1 CHECK PASSENGER AIRBAG ON/OFF INDICATOR OPERATION

  1. Turn the ignition switch to the ON position.
  2. 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

Result

Result

Go to step 10

2 CHECK CONNECTION OF CONNECTORS

  1. Turn the ignition switch to the LOCK position.
  2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
  3. 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

3 CHECK CONNECTORS

  1. Disconnect the connectors from the center airbag sensor assembly and the air conditioning control assembly.
  2. 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

4 CHECK PASSENGER AIRBAG ON/OFF INDICATOR

  1. Connect the connector to the center airbag sensor assembly.
  2. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
  3. Turn the ignition switch to the ON position.
  4. 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

  1. Turn the ignition switch to the LOCK position.
  2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
  3. Connect the connector to the air conditioning control assembly.
  4. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
  5. Turn the ignition switch to the ON position, and wait for at least 60 seconds.
  6. Clear the DTCs stored in memory (5).
  7. Turn the ignition switch to the LOCK position.
  8. Turn the ignition switch to the ON position, and wait for at least 60 seconds.
  9. 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

USE SIMULATION METHOD TO CHECK

6 CHECK INSTRUMENT PANEL WIRE (OPEN)

CHECK INSTRUMENT PANEL WIRE (OPEN)
  1. Turn the ignition switch to the LOCK position.
  2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
  3. Disconnect the connector from the center airbag sensor assembly.
  4. 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

    Manual air conditioning: Standard resistance

    Manual air conditioning

    REPAIR OR REPLACE INSTRUMENT PANEL WIRE

    7 CHECK INSTRUMENT PANEL WIRE (SHORT)

    CHECK INSTRUMENT PANEL WIRE (SHORT)
    1. Disconnect the service wire from connector "B".
    2. Measure the resistance according to the value(s) in the table below.

    Automatic air conditioning: Standard resistance

    Automatic air conditioning

    Manual air conditioning: Standard resistance

    Manual air conditioning

    REPAIR OR REPLACE INSTRUMENT PANEL WIRE

    8 CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

    CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)
    1. Measure the resistance according to the value(s) in the table below.

    Automatic air conditioning: Standard resistance

    Automatic air conditioning

    Manual air conditioning: Standard resistance

    Manual air conditioning

    REPAIR OR REPLACE INSTRUMENT PANEL WIRE

    9 CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)

    1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    2. Turn the ignition switch to the ON position.
    3. Measure the voltage according to the value(s) in the table below.

    Automatic air conditioning: Standard voltage

    Automatic air conditioning

    Manual air conditioning: Standard voltage

    Manual air conditioning

    REPAIR OR REPLACE INSTRUMENT PANEL WIRE

    REPLACE AIR CONDITIONING CONTROL ASSEMBLY

    10 CHECK CONNECTION OF CONNECTORS

    CHECK CONNECTION OF CONNECTORS
    1. Turn the ignition switch to the LOCK position.
    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    3. 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

    11 CHECK CONNECTORS

    1. Disconnect the connectors from the center airbag sensor assembly and the air conditioning control assembly.
    2. 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

    12 CHECK INSTRUMENT PANEL WIRE (OPEN)

    CHECK INSTRUMENT PANEL WIRE (OPEN)
    1. Using a service wire, connect A21-1 (ABON) and A21-25 (ABOF) of connector "B".
    2. Measure the resistance according to the value(s) in the table below.

    Automatic air conditioning: Standard resistance

    Automatic air conditioning

    Manual air conditioning: Standard resistance

    Manual air conditioning

    REPAIR OR REPLACE INSTRUMENT PANEL WIRE

    13 CHECK INSTRUMENT PANEL WIRE (SHORT)

    CHECK INSTRUMENT PANEL WIRE (SHORT)
    1. Disconnect the service wire from connector "B".
    2. Measure the resistance according to the value(s) in the table below.

    Automatic air conditioning: Standard resistance

    Automatic air conditioning

    Manual air conditioning: Standard resistance

    Manual air conditioning

    REPAIR OR REPLACE INSTRUMENT PANEL WIRE

    14 CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

    CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)
    1. Measure the resistance according to the value(s) in the table below.

    Automatic air conditioning: Standard resistance

    Automatic air conditioning

    Manual air conditioning: Standard resistance

    Manual air conditioning

    REPAIR OR REPLACE INSTRUMENT PANEL WIRE

    15 CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)

    CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)
    1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    2. Turn the ignition switch to the ON position.
    3. Measure the voltage according to the value(s) in the table below.

    Automatic air conditioning: Standard voltage

    Automatic air conditioning

    Manual air conditioning: Standard voltage

    Manual air conditioning

    REPAIR OR REPLACE INSTRUMENT PANEL WIRE

    16 CHECK WIRE HARNESS (POWER SOURCE)

    CHECK WIRE HARNESS (POWER SOURCE)
    1. Turn the ignition switch to the LOCK position.
    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    3. Connect the connector to the center airbag sensor assembly.
    4. Turn the ignition switch to the ON position.
    5. Measure the voltage and resistance according to the value(s) in the table below.

    Automatic air conditioning: Standard voltage

    Automatic air conditioning

    Manual air conditioning: Standard voltage

    Manual air conditioning

    REPAIR OR REPLACE POWER SOURCE CIRCUIT

    17 CHECK PASSENGER AIRBAG ON/OFF INDICATOR

    CHECK PASSENGER AIRBAG ON/OFF INDICATOR
    1. Turn the ignition switch to the LOCK position.
    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    3. Connect the connector to the air conditioning control assembly.
    4. Disconnect the connector from center airbag sensor assembly.
    5. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    6. Turn the ignition switch to the ON position.
    7. Check the passenger airbag ON/OFF indicator condition.

    Result

    Result

    REPLACE AIR CONDITIONING CONTROL ASSEMBLY

    18 CHECK CENTER AIRBAG SENSOR ASSEMBLY

    CHECK CENTER AIRBAG SENSOR ASSEMBLY
    1. Turn the ignition switch to the LOCK position.
    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    3. Connect the connector to the center airbag sensor assembly.
    4. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    5. Turn the ignition switch to the ON position, and wait for at least 60 seconds.
    6. Clear the DTCs stored in memory (5).
    7. Turn the ignition switch to the LOCK position.
    8. Turn the ignition switch to the ON position, and wait for at least 60 seconds.
    9. 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

    USE SIMULATION METHOD TO CHECK

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