Dtc B1633/81 Rear Airbag Sensor Assembly Rh Initialization Incomplete


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

CHECK CONNECTION OF CONNECTORS

CHECK CONNECTORS

CHECK FLOOR WIRE (CENTER AIRBAG SENSOR - REAR AIRBAG SENSOR RH)

CHECK REAR AIRBAG SENSOR RH

CHECK SIDE AIRBAG SENSOR RH

CHECK CONNECTION OF CONNECTORS

CHECK CONNECTORS

CHECK NO. 2 FLOOR WIRE (CENTER AIRBAG SENSOR - REAR AIRBAG SENSOR LH)

CHECK REAR AIRBAG SENSOR LH

CHECK SIDE AIRBAG SENSOR LH

DTC B1633/81 Rear Airbag Sensor Assembly RH Initialization Incomplete

DTC B1638/82 Rear Airbag Sensor Assembly LH Initialization Incomplete


DESCRIPTION

The circuit for the side collision sensor LH or RH (to determine deployment of the front seat side airbag LH or RH and curtain shield airbag LH or RH) is composed of the center airbag sensor, side airbag sensor LH or RH and rear airbag sensor LH or RH.
The rear airbag sensor LH or RH detect impacts to the vehicle and send signals to the center airbag sensor to determine if the airbag should be deployed.
DTC B1633 or B1638 is stored when a malfunction is detected in the circuit for the rear collision sensor LH or RH (to determine deployment of the curtain shield airbag LH or RH).

DTC Code
DTC Detection Condition
Trouble Area
B1633/81
One of the following conditions is met:
  1. The center airbag sensor detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the circuit for the rear collision sensor RH (to determine deployment of the curtain shield airbag RH) for 2 seconds.
  2. A rear airbag sensor RH malfunction.
  3. A side airbag sensor RH malfunction.
  4. A center airbag sensor malfunction.
  1. Floor wire
  2. Rear airbag sensor RH
  3. Side airbag sensor assembly RH
  4. Center airbag sensor assembly
B1638/82
One of the following conditions is met:
  1. The center airbag sensor detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the circuit for the rear collision sensor LH (to determine deployment of the curtain shield airbag LH) for 2 seconds.
  2. A rear airbag sensor LH malfunction.
  3. A side airbag sensor LH malfunction.
  4. A center airbag sensor malfunction.
  1. No. 2 floor wire
  2. Rear airbag sensor LH
  3. Side airbag sensor assembly LH
  4. Center airbag sensor assembly

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Supplemental Restraint Systems.Airbag System. Dtc B1633/81 Rear Airbag Sensor Assembly Rh Initialization Incomplete


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Supplemental Restraint Systems.Airbag System. Dtc B1633/81 Rear Airbag Sensor Assembly Rh Initialization Incomplete


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 (LandCruiser RM000003YMD00TX.html).
  2. When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected (LandCruiser RM000003YMF011X.html).
1.CHECK FOR DTC

  1. Turn the ignition switch off.

    HINT:
    If a communication error occurs, DTCs for both the LH and RH sides will be stored simultaneously. The malfunctioning area can be identified by turning the ignition switch off and then to ON again.

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

  1. Check for DTCs (LandCruiser RM000000XFE0NGX.html).

    Result
    Result
    		Proceed to
    DTC B1633 and B1638 are not output
    		A
    DTC B1638 is output
    		B
    DTC B1633 is output
    		C
    HINT:
    Codes other than DTC B1633 and B1638 may be output at this time, but they are not related to this check.


A
USE SIMULATION METHOD TO CHECK (LandCruiser RM000000XFD0N3X.html)

B
Go to step 7
C


2.CHECK CONNECTION OF CONNECTORS

  1. Turn the ignition switch off.

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

  1. Check that the connectors are properly connected to the center airbag sensor and rear airbag sensor RH.

    OK:
    The connectors are properly connected.


NG
CONNECT CONNECTORS PROPERLY
OK


3.CHECK CONNECTORS

  1. Disconnect the connectors from the center airbag sensor and rear airbag sensor RH.



    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Supplemental Restraint Systems.Airbag System. Dtc B1633/81 Rear Airbag Sensor Assembly Rh Initialization Incomplete

  1. Check that the connectors (on the center airbag sensor side and rear airbag sensor RH side) are not damaged.

    OK:
    The connectors are not deformed or damaged.
    Text in Illustration
    *1
    		Rear Airbag Sensor RH
    *2
    		Center Airbag Sensor


NG
REPLACE FLOOR WIRE
OK


4.CHECK FLOOR WIRE (CENTER AIRBAG SENSOR - REAR AIRBAG SENSOR RH)


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


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Supplemental Restraint Systems.Airbag System. Dtc B1633/81 Rear Airbag Sensor Assembly Rh Initialization Incomplete


    Text in Illustration
    *1
    		Rear Airbag Sensor RH
    		*2
    		Center Airbag Sensor
    *3
    		Floor Wire
    		*4
    		Connector C
    *5
    		Connector B
    		*6
    		Service Wire
    *a
    		Rear view of wire harness connector
    (to Rear Airbag Sensor RH)
    		*b
    		Rear view of wire harness connector
    (to Center Airbag Sensor)

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    Q4-4 (BBR+) - Body ground
    		Ignition switch ON
    		Below 1 V
    Q4-3 (BBR-) - Body ground
    		Ignition switch 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. Using a service wire, connect terminals 8 (BBR+) and 11 (BBR-) of connector B.

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

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Q4-4 (BBR+) - Q4-3 (BBR-)
    		Always
    		Below 1 Ω

  1. Disconnect the service wire from connector B.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Q4-4 (BBR+) - Q4-3 (BBR-)
    		Always
    		1 MΩ or higher
    Q4-4 (BBR+) - Body ground
    		Always
    		1 MΩ or higher
    Q4-3 (BBR-) - Body ground
    		Always
    		1 MΩ or higher


NG
REPLACE FLOOR WIRE
OK


5.CHECK REAR AIRBAG SENSOR RH


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Supplemental Restraint Systems.Airbag System. Dtc B1633/81 Rear Airbag Sensor Assembly Rh Initialization Incomplete

  1. Connect the connector to the center airbag sensor.

  1. Interchange the rear airbag sensor LH with RH and connect the connectors to them.

  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 stored in memory (LandCruiser RM000000XFE0NGX.html).

  1. Turn the ignition switch off.

  1. Turn the ignition switch to ON, and wait for at least 90 seconds.

  1. Check for DTCs (LandCruiser RM000000XFE0NGX.html).

    Result
    Result
    		Proceed to
    DTC B1633 and B1638 are not output
    		A
    DTC B1638 is output (for 3 Door)
    		B
    DTC B1638 is output (for 5 Door)
    		C
    DTC B1633 is output
    		D
    HINT:
    Codes other than DTC B1633 and B1638 may be output at this time, but they are not related to this check.
    Text in Illustration
    *1
    		Rear Airbag Sensor LH
    *2
    		Center Airbag Sensor

  1. Turn the ignition switch off.

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

  1. Return the rear airbag sensor LH and RH to their original positions and connect the connectors to them.



A
USE SIMULATION METHOD TO CHECK (LandCruiser RM000000XFD0N3X.html)

B
REPLACE REAR AIRBAG SENSOR RH (LandCruiser RM000003YQN01LX.html)

C
REPLACE REAR AIRBAG SENSOR RH (LandCruiser RM000003YQN01KX.html)
D


6.CHECK SIDE AIRBAG SENSOR RH


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Supplemental Restraint Systems.Airbag System. Dtc B1633/81 Rear Airbag Sensor Assembly Rh Initialization Incomplete

  1. Interchange the side airbag sensor LH with RH and connect the connectors to them.

  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 stored in memory (LandCruiser RM000000XFE0NGX.html).

  1. Turn the ignition switch off.

  1. Turn the ignition switch to ON, and wait for at least 90 seconds.

  1. Check for DTCs (LandCruiser RM000000XFE0NGX.html).

    Result
    Result
    		Proceed to
    DTC B1633 and B1638 are not output
    		A
    DTC B1638 is output
    		B
    DTC B1633 is output
    		C
    HINT:
    Codes other than DTC B1643, B1693 and B1698 may be output at this time, but they are not related to this check.
    Text in Illustration
    *1
    		Side Airbag Sensor LH
    *2
    		Rear Airbag Sensor RH

  1. Turn the ignition switch off.

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

  1. Return the side airbag sensor LH and RH to their original positions and connect the connectors to them.



A
USE SIMULATION METHOD TO CHECK (LandCruiser RM000000XFD0N3X.html)

B
REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH (LandCruiser RM000003YQJ019X.html)
C

REPLACE CENTER AIRBAG SENSOR ASSEMBLY (LandCruiser RM000003YQB01BX.html)

7.CHECK CONNECTION OF CONNECTORS

  1. Turn the ignition switch off.

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

  1. Check that the connectors are properly connected to the center airbag sensor and rear airbag sensor LH.

    OK:
    The connectors are properly connected.


NG
CONNECT CONNECTORS PROPERLY
OK


8.CHECK CONNECTORS

  1. Disconnect the connectors from the center airbag sensor and rear airbag sensor LH.



    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Supplemental Restraint Systems.Airbag System. Dtc B1633/81 Rear Airbag Sensor Assembly Rh Initialization Incomplete

  1. Check that the connectors (on the center airbag sensor side and rear airbag sensor LH side) are not damaged.

    OK:
    The connectors are not deformed or damaged.
    Text in Illustration
    *1
    		Rear Airbag Sensor LH
    *2
    		Center Airbag Sensor


NG
REPLACE NO. 2 FLOOR WIRE
OK


9.CHECK NO. 2 FLOOR WIRE (CENTER AIRBAG SENSOR - REAR AIRBAG SENSOR LH)


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


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Supplemental Restraint Systems.Airbag System. Dtc B1633/81 Rear Airbag Sensor Assembly Rh Initialization Incomplete


    Text in Illustration
    *1
    		Rear Airbag Sensor LH
    		*2
    		Center Airbag Sensor
    *3
    		No. 2 Floor Wire
    		*4
    		Connector C
    *5
    		Connector B
    		*6
    		Service Wire
    *a
    		Rear view of wire harness connector
    (to Rear Airbag Sensor LH)
    		*b
    		Rear view of wire harness connector
    (to Center Airbag Sensor)

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    R4-4 (BBL+) - Body ground
    		Ignition switch ON
    		Below 1 V
    R4-3 (BBL-) - Body ground
    		Ignition switch 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. Using a service wire, connect terminals 8 (BBL+) and 15 (BBL-) of connector B.

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

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    R4-4 (BBL+) - R4-3 (BBL-)
    		Always
    		Below 1 Ω

  1. Disconnect the service wire from connector B.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    R4-4 (BBL+) - R4-3 (BBL-)
    		Always
    		1 MΩ or higher
    R4-4 (BBL+) - Body ground
    		Always
    		1 MΩ or higher
    R4-3 (BBL-) - Body ground
    		Always
    		1 MΩ or higher


NG
REPLACE NO. 2 FLOOR WIRE
OK


10.CHECK REAR AIRBAG SENSOR LH


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Supplemental Restraint Systems.Airbag System. Dtc B1633/81 Rear Airbag Sensor Assembly Rh Initialization Incomplete

  1. Connect the connector to the center airbag sensor.

  1. Interchange the rear airbag sensor LH with RH and connect the connectors to them.

  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 stored in memory (LandCruiser RM000000XFE0NGX.html).

  1. Turn the ignition switch off.

  1. Turn the ignition switch to ON, and wait for at least 90 seconds.

  1. Check for DTCs (LandCruiser RM000000XFE0NGX.html).

    Result
    Result
    		Proceed to
    DTC B1633 and B1638 are not output
    		A
    DTC B1633 is output (for 3 Door)
    		B
    DTC B1633 is output (for 5 Door)
    		C
    DTC B1638 is output
    		D
    HINT:
    Codes other than DTC B1633 and B1638 may be output at this time, but they are not related to this check.
    Text in Illustration
    *1
    		Rear Airbag Sensor RH
    *2
    		Center Airbag Sensor

  1. Turn the ignition switch off.

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

  1. Return the rear airbag sensor RH and LH to their original positions and connect the connectors to them.



A
USE SIMULATION METHOD TO CHECK (LandCruiser RM000000XFD0N3X.html)

B
REPLACE REAR AIRBAG SENSOR LH (LandCruiser RM000003YQN01LX.html)

C
REPLACE REAR AIRBAG SENSOR LH (LandCruiser RM000003YQN01KX.html)
D


11.CHECK SIDE AIRBAG SENSOR LH


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Supplemental Restraint Systems.Airbag System. Dtc B1633/81 Rear Airbag Sensor Assembly Rh Initialization Incomplete

  1. Interchange the side airbag sensor LH with RH and connect the connectors to them.

  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 stored in memory (LandCruiser RM000000XFE0NGX.html).

  1. Turn the ignition switch off.

  1. Turn the ignition switch to ON, and wait for at least 90 seconds.

  1. Check for DTCs (LandCruiser RM000000XFE0NGX.html).

    Result
    Result
    		Proceed to
    DTC B1633 and B1638 are not output
    		A
    DTC B1633 is output
    		B
    DTC B1638 is output
    		C
    HINT:
    Codes other than DTC B1633 and B1638 may be output at this time, but they are not related to this check.
    Text in Illustration
    *1
    		Side Airbag Sensor RH
    *2
    		Rear Airbag Sensor LH

  1. Turn the ignition switch off.

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

  1. Return the side airbag sensor RH and LH to their original positions and connect the connectors to them.



A
USE SIMULATION METHOD TO CHECK (LandCruiser RM000000XFD0N3X.html)

B
REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH (LandCruiser RM000003YQJ019X.html)
C

REPLACE CENTER AIRBAG SENSOR ASSEMBLY (LandCruiser RM000003YQB01BX.html)