Dtc B1805/52 Short In Front Passenger Side Squib Circuit

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Supplemental Restraint Systems. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FRONT PASSENGER AIRBAG (FRONT PASSENGER SIDE SQUIB)

CHECK CONNECTOR

CHECK FRONT PASSENGER SIDE SQUIB CIRCUIT

CHECK CENTER AIRBAG SENSOR

CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - INSTRUMENT PANEL WIRE ASSEMBLY)

DTC B1805/52 Short in Front Passenger Side Squib Circuit

DTC B1806/52 Open in Front Passenger Side Squib Circuit

DTC B1807/52 Short to GND in Front Passenger Side Squib Circuit

DTC B1808/52 Short to B+ in Front Passenger Side Squib Circuit


DESCRIPTION

The front passenger side squib circuit consists of the center airbag sensor and the front passenger airbag.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are stored when a malfunction is detected in the front passenger side squib circuit.

DTC Code
DTC Detection Condition
Trouble Area
B1805/52
When one of the following conditions is met:
  1. The center airbag sensor receives a line short circuit signal 5 times in the front passenger side squib circuit during the primary check.
  2. A front passenger side squib malfunction.
  3. A center airbag sensor malfunction.
  1. Instrument panel wire
  2. Instrument panel wire assembly
  3. Front passenger airbag assembly (Front passenger side squib)
  4. Center airbag sensor assembly
B1806/52
When one of the following conditions is met:
  1. The center airbag sensor receives an open circuit signal in the front passenger side squib circuit for 2 seconds.
  2. A front passenger side squib malfunction.
  3. A center airbag sensor malfunction.
  1. Instrument panel wire
  2. Instrument panel wire assembly
  3. Front passenger airbag assembly (Front passenger side squib)
  4. Center airbag sensor assembly
B1807/52
When one of the following conditions is met:
  1. The center airbag sensor receives a short circuit to ground signal in the front passenger side squib circuit for 0.5 seconds.
  2. A front passenger side squib malfunction.
  3. A center airbag sensor malfunction.
  1. Instrument panel wire
  2. Instrument panel wire assembly
  3. Front passenger airbag assembly (Front passenger side squib)
  4. Center airbag sensor assembly
B1808/52
When one of the following conditions is met:
  1. The center airbag sensor receives a short circuit to B+ signal in the front passenger side squib circuit for 0.5 seconds.
  2. A front passenger side squib malfunction.
  3. A center airbag sensor malfunction.
  1. Instrument panel wire
  2. Instrument panel wire assembly
  3. Front passenger airbag assembly (Front passenger side squib)
  4. Center airbag sensor assembly

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1805/52 Short In Front Passenger Side Squib Circuit


INSPECTION PROCEDURE

NOTICE:
  1. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (Click here).
  2. When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Click here).
  3. After replacing the center airbag sensor assembly, refer to initialization (Click here).
HINT:
To perform the simulation method, enter the check mode (signal check) with the intelligent tester (Click here), and then wiggle each connector of the airbag system or drive the vehicle on various type of road (Click here).
1.CHECK FRONT PASSENGER AIRBAG (FRONT PASSENGER SIDE SQUIB)


  1. Turn the ignition switch off.


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1805/52 Short In Front Passenger Side Squib Circuit

  1. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

  1. Disconnect the connectors from the front passenger airbag.

  1. Connect the white wire side of SST (resistance: 2.1 Ω) to connector E (orange connector).

    CAUTION:
    Never connect the tester to the front passenger airbag (front passenger side squib) for measurement, as this may lead to a serious injury due to airbag deployment.
    NOTICE:
    1. Do not forcibly insert SST into the terminals of the connector when connecting SST.
    2. Insert SST straight into the terminals of the connector.
SST
09843-18061

  1. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

  1. Turn the ignition switch to ON, and wait for at least 60 seconds.

  1. Clear the DTCs (Click here).

  1. Turn the ignition switch off.

  1. Turn the ignition switch to ON, and wait for at least 60 seconds.

  1. Check for DTCs (Click here).

    OK:
    DTC B1805, B1806, B1807 or B1808 is not output.
    HINT:
    Codes other than DTC B1805, B1806, B1807 and B1808 may be output at this time, but they are not related to this check.


NG
Go to step 2
OK

REPLACE FRONT PASSENGER AIRBAG ASSEMBLY (Click here)

2.CHECK CONNECTOR

  1. Turn the ignition switch off.

  1. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

  1. Disconnect SST from connector E.

  1. Check that the instrument panel wire connectors (on the front passenger airbag side) are not damaged.

    OK:
    The lock button is not disengaged, and the claw of the lock is not deformed or damaged.


NG
REPLACE INSTRUMENT PANEL WIRE ASSEMBLY
OK


3.CHECK FRONT PASSENGER SIDE SQUIB CIRCUIT


  1. Disconnect the connectors from the center airbag sensor.


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1805/52 Short In Front Passenger Side Squib Circuit

  1. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    b3-1 (P+) - Body ground
    		Ignition switch to ON
    		Below 1 V
    b3-2 (P-) - Body ground
    		Ignition switch to ON
    		Below 1 V

  1. Turn the ignition switch off.

  1. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    b3-1 (P+) - b3-2 (P-)
    		Always
    		Below 1 Ω

  1. Release the activation prevention mechanism built into connector B (Click here).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    b3-1 (P+) - b3-2 (P-)
    		Always
    		1 MΩ or higher
    b3-1 (P+) - Body ground
    		Always
    		1 MΩ or higher
    b3-2 (P-) - Body ground
    		Always
    		1 MΩ or higher


NG
Go to step 5
OK


4.CHECK CENTER AIRBAG SENSOR


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1805/52 Short In Front Passenger Side Squib Circuit

  1. Connect the connectors to the front passenger airbag and the center airbag sensor.

  1. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

  1. Turn the ignition switch to ON, and wait for at least 60 seconds.

  1. Clear the DTCs (Click here).

  1. Turn the ignition switch off.

  1. Turn the ignition switch to ON, and wait for at least 60 seconds.

  1. Check for DTCs (Click here).

    OK:
    DTC B1805, B1806, B1807 or B1808 is not output.
    HINT:
    Codes other than DTC B1805, B1806, B1807 and B1808 may be output at this time, but they are not related to this check.


NG
REPLACE CENTER AIRBAG SENSOR ASSEMBLY (Click here)
OK

USE SIMULATION METHOD TO CHECK (Click here)

5.CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - INSTRUMENT PANEL WIRE ASSEMBLY)


  1. Restore the released activation prevention mechanism of connector B to its original condition.


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1805/52 Short In Front Passenger Side Squib Circuit

  1. Disconnect the instrument panel wire connector from the instrument panel wire assembly.

  1. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    Eb1-3 - Body ground
    		Ignition switch to ON
    		Below 1 V
    Eb1-4 - Body ground
    		Ignition switch to ON
    		Below 1 V

  1. Turn the ignition switch off.

  1. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Eb1-3 - Eb1-4
    		Always
    		Below 1 Ω

  1. Release the activation prevention mechanism built into connector B (Click here).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Eb1-3 - Eb1-4
    		Always
    		1 MΩ or higher
    Eb1-3 - Body ground
    		Always
    		1 MΩ or higher
    Eb1-4 - Body ground
    		Always
    		1 MΩ or higher


NG
REPLACE INSTRUMENT PANEL WIRE
OK

REPLACE INSTRUMENT PANEL WIRE ASSEMBLY