Toyota RAV4 manuals

Toyota Sienna Service Manual: Rear Airbag Sensor LH Circuit Malfunction

DTC B1155/39 Rear Airbag Sensor LH Circuit Malfunction

DESCRIPTION

The rear airbag sensor LH circuit consists of the center airbag sensor assembly and rear airbag sensor LH.

If the center airbag sensor assembly receives signals from the rear airbag sensor LH, it judges whether or not the SRS should be activated.

DTC B1155/39 is recorded when a malfunction is detected in the rear airbag sensor LH 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 B1155/39 is not output.

HINT: Codes other than code B1155/39 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 rear airbag sensor LH.

OK: The connectors are connected.

3 CHECK FLOOR WIRE (OPEN)

CHECK FLOOR WIRE (OPEN)

  1. Disconnect the connectors from the center airbag sensor assembly and the rear airbag sensor LH.
  2. Using a service wire, connect A20-14 (VUCL) and A20- 13 (ESCL) 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

CHECK FLOOR WIRE (OPEN)

  1. Using a service wire, connect A20-15 (CSL+) and A20-1 (CSL-) of connector "B".

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

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

Standard resistance

Standard resistance

4 CHECK FLOOR WIRE (SHORT TO B+)

CHECK FLOOR WIRE (SHORT TO B+)

  1. Disconnect SST from connector "B".
  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. Measure the voltage according to the value(s) in the table below.

Standard voltage

Standard voltage

5 CHECK FLOOR WIRE (SHORT TO GROUND)

CHECK FLOOR WIRE (SHORT TO GROUND)

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

Standard resistance

Standard resistance

6 CHECK FLOOR WIRE (SHORT)

CHECK FLOOR WIRE (SHORT)

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

Standard resistance

Standard resistance

7 CHECK REAR AIRBAG SENSOR LH

CHECK REAR AIRBAG SENSOR LH

  1. Connect the connector to the center airbag sensor assembly.
  2.  Interchange the rear airbag sensor RH with LH and connect the connectors to them.
  3.  Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
  4.  Turn the ignition switch to the ON position, and wait for at least 60 seconds.
  5.  Clear the DTCs stored in memory.
  6.  Turn the ignition switch to the LOCK position.
  7.  Turn the ignition switch to the ON position, and wait for at least 60 seconds.
  8.  Check the DTCs.

Result

Result

HINT: Codes other than DTC B1154/38 and B1155/39 may be output at this time, but they are not related to this check.

USE SIMULATION METHOD TO CHECK

Rear Airbag Sensor RH Circuit Malfunction
DTC B1154/38 Rear Airbag Sensor RH Circuit Malfunction DESCRIPTION The rear airbag sensor RH circuit consists of the center airbag sensor assembly and rear airbag sensor RH. If the center airb ...

Short in Curtain Shield Squib RH Circuit
DTC B1160/83 Short in Curtain Shield Squib RH Circuit DESCRIPTION The curtain shield squib RH circuit consists of the center airbag sensor assembly and the curtain shield airbag assembly RH. T ...

Other materials:

Hitch
Trailer hitch assemblies have different weight capacities. Toyota recommends the use of Toyota hitch/bracket for your vehicle. For details, contact your Toyota dealer. If you wish to install a trailer hitch, contact your Toyota dealer. Use only a hitch that conforms to the gross trailer w ...

Front Occupant Classification Sensor RH Circuit Malfunction
DTC B1781 Front Occupant Classification Sensor RH Circuit Malfunction DESCRIPTION The front occupant classification sensor RH circuit consists of the occupant classification ECU and the front occupant classification sensor RH. DTC B1781 is recorded when a malfunction is detected in the fron ...

Engine Coolant Temperature Circuit
DESCRIPTION A thermistor is built into the Engine Coolant Temperature (ECT) sensor, of which the resistance value varies according to the ECT. The structure of the sensor and its connection to the ECM are the same as those of the Intake Air Temperature (IAT) sensor. HINT: When any ...

В© 2011-2024 Copyright www.tsienna.net