Toyota RAV4 manuals

Toyota Sienna Service Manual: Front Airbag Sensor RH Circuit Malfunction

DTC B1148/36 Front Airbag Sensor RH Circuit Malfunction

DESCRIPTION

The front airbag sensor RH circuit consists of the center airbag sensor assembly and front airbag sensor RH. If the center airbag sensor assembly receives signals from the front airbag sensor RH, it judges whether or not the SRS should be activated.

DTC B1148/36 is recorded when a malfunction is detected in the front airbag sensor RH circuit.

DESCRIPTION

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 CHECK DTC

CHECK DTC

  1. Turn the ignition switch to the ON position, and wait for at least 60 seconds.
  2.  Clear the DTCs stored in memory.
  3.  Turn the ignition switch to the LOCK position.
  4.  Turn the ignition switch to the ON position, and wait for at least 60 seconds.
  5.  Check the DTCs.

OK: DTC B1148/36 is not output.

HINT: Codes other than DTC B1148/36 may be output at this time, but they are not related to this check.

USE SIMULATION METHOD TO CHECK

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 front airbag sensor RH.

OK: The connectors are connected.

3 CHECK FRONT AIRBAG SENSOR RH CIRCUIT (OPEN)

CHECK FRONT AIRBAG SENSOR RH CIRCUIT

  1. Disconnect the connectors from the center airbag sensor assembly and the front airbag sensor RH.
  2. Using a service wire, connect A21-9 (+SR) and A21-20 (- SR) of connector "B".

    NOTICE: Do not forcibly insert a service wire into the terminals of the connector when connecting.

  3. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

4 CHECK FRONT AIRBAG SENSOR RH

CHECK FRONT AIRBAG SENSOR RH

  1. Disconnect the service wire from connector "B".
  2.  Connect the connector to the center airbag sensor assembly.
  3.  Interchange the front airbag sensor RH with LH, and connect the connectors to them.
  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.
  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.

Result

HINT: Codes other than DTC B1148/36 and B1149/37 may be output at this time, but they are not related to this check.

USE SIMULATION METHOD TO CHECK

5 CHECK INSTRUMENT PANEL WIRE (OPEN)

CHECK INSTRUMENT PANEL WIRE

  1. Disconnect the instrument panel wire connector from the engine room main wire.

    HINT: The service wire has already been inserted into connector "B".

  2. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

REPAIR OR REPLACE ENGINE ROOM MAIN WIRE

Side Airbag Sensor Assembly LH Circuit Malfunction
DTC B1141/33 Side Airbag Sensor Assembly LH Circuit Malfunction DESCRIPTION The side airbag sensor LH circuit consists of the center airbag sensor assembly and side airbag sensor LH. If the ce ...

Front Airbag Sensor LH Circuit Malfunction
DTC B1149/37 Front Airbag Sensor LH Circuit Malfunction DESCRIPTION The front airbag sensor LH circuit consists of the center airbag sensor assembly and front airbag sensor LH. If the center a ...

Other materials:

Installation
1. INSTALL NO.1 NAVIGATION BRACKET  Install the No.1 navigation bracket with the 4 screws. 2. INSTALL NO.2 NAVIGATION BRACKET  Install the No.2 navigation bracket with the 4 screws. 3. INSTALL INSTRUMENT CLUSTER FINISH PANEL UPPER  Install the instrum ...

Disposal
1. DISPOSE OF FRONT SEAT OUTER BELT ASSEMBLY (WHEN INSTALLED IN VEHICLE) NOTICE:  Never dispose of a front seat outer belt assembly with an deactivated pretensioner.  The seat belt pretensioner produces an exploding sound when it activates, so perform the operation outdoors w ...

Checking monitor status
The purpose of the monitor result (mode 06) is to allow access to the results for on-board diagnostic monitoring tests of specific components/systems that are not continuously monitored. Examples are catalyst, evaporative emission (EVAP) and thermostat. The monitor result allows the OBD II sc ...

В© 2011-2019 Copyright www.tsienna.net