Toyota RAV4 manuals

Toyota Sienna Service Manual: Short to GND in Front Passenger Side Squib 2nd Step Circuit

Toyota Sienna Service Manual / Supplemental restraint system / Airbag system / Diagnostic trouble code chart / Short to GND in Front Passenger Side Squib 2nd Step Circuit

DTC B1187/55 Short to GND in Front Passenger Side Squib 2nd Step Circuit

DESCRIPTION

The front passenger side squib 2nd step circuit consists of the center airbag sensor assembly and the front passenger airbag assembly.

The circuit instructs the SRS to deploy when deployment conditions are met.

DTC B1187/55 is recorded when a short to ground is detected in the front passenger side squib 2nd step circuit.

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

1 CHECK FRONT PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB 2ND STEP)

 CHECK FRONT PASSENGER AIRBAG 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.  Disconnect the connectors from the front passenger airbag assembly.
  4.  Connect the black wire side of SST (resistance 2.1 Ω) to the instrument panel wire.

    CAUTION: Never connect a tester to the front passenger airbag assembly (front passenger side squib 2nd step) for measurement, as this may lead to a serious injury due to airbag deployment.

    NOTICE: Do not forcibly insert the SST into the terminals of the connector when connecting.

    Insert the SST straight into the terminals of the connector.

    SST 09843-18060

  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, and wait for at least 60 seconds.
  7.  Clear the DTCs stored in memory.
  8.  Turn the ignition switch to the LOCK position.
  9.  Turn the ignition switch to the ON position, and wait for at least 60 seconds.
  10.  Check the DTCs.

OK: DTC B1187/55 is not output.

HINT: Codes other than DTC B1187/55 may be output at this time, but they are not related to this check.

REPLACE FRONT PASSENGER AIRBAG ASSEMBLY

2 CHECK INSTRUMENT PANEL WIRE (FRONT PASSENGER SIDE SQUIB 2ND STEP CIRCUIT)

CHECK INSTRUMENT PANEL WIRE

  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 SST (resistance 2.1 Ω) from the instrument panel wire.
  4.  Disconnect the connector from the center airbag sensor assembly.
  5.  Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

3 CHECK CENTER AIRBAG SENSOR ASSEMBLY

CHECK CENTER AIRBAG SENSOR ASSEMBLY

  1. Connect the connectors to the front passenger airbag assembly and 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, and wait for at least 60 seconds.
  4.  Clear the DTCs stored in memory.
  5.  Turn the ignition switch to the LOCK position.
  6.  Turn the ignition switch to the ON position, and wait for at least 60 seconds.
  7.  Check the DTCs.

OK: DTC B1187/55 is not output.

HINT: Codes other than DTC B1187/55 may be output at this time, but they are not related to this check.

USE SIMULATION METHOD TO CHECK

Open in Front Passenger Side Squib 2nd Step Circuit
DTC B1186/58 Open in Front Passenger Side Squib 2nd Step Circuit DESCRIPTION The front passenger side squib 2nd step circuit consists of the center airbag sensor assembly and the front passenger ...

Short to B+ in Front Passenger Side Squib 2nd Step Circuit
DTC B1188/56 Short to B+ in Front Passenger Side Squib 2nd Step Circuit DESCRIPTION The front passenger side squib 2nd step circuit consists of the center airbag sensor assembly and the front pa ...

Other materials:

Network gateway ECU
COMPONENTS REMOVAL 1. REMOVE FRONT DOOR SCUFF PLATE LH 2. REMOVE COWL SIDE TRIM BOARD LH 3. REMOVE INSTRUMENT PANEL FINISH PANEL LOWER LH (See page IP-6) 4. REMOVE INSTRUMENT PANEL SAFETY PAD INSERT NO. 1 (See page IP-6) 5. REMOVE CLEARANCE WARNING ECU ASSEMBLY (See page PM-15) 6. REMOVE ...

Rear Power Seat Switch Circuit
DESCRIPTION When the power rear no. 2 seat switch is operated, a recline signal is sent to the fold seat control ECU. The ECU activates the reclining motor based on the signal from the power rear no. 2 seat switch. WIRING DIAGRAM INSPECTION PROCEDURE 1 INSPECT FOLD SEAT CONTROL ECU ...

Deactivating or stopping the alarm
Do one of the following to deactivate or stop the alarm: Unlock the doors using the entry function (vehicles with a smart key system) or wireless remote control. Vehicles without a smart key system: Turn the engine switch to the “ACC” or “ON” position, or start the engine. Veh ...

© 2011-2025 Copyright www.tsienna.net