Dtc B1661/44 Roll Over Cut Off Indicator Malfunction

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK COMBINATION METER (SOURCE VOLTAGE)

CHECK RSCA OFF INDICATOR CIRCUIT

INSPECT CURTAIN SHIELD AIRBAG CUTOFF SWITCH

CHECK CURTAIN SHIELD AIRBAG CUTOFF SWITCH CIRCUIT

CHECK INSTRUMENT PANEL WIRE (INSTRUMENT PANEL WIRE - NO. 3 INSTRUMENT PANEL WIRE AND BODY GROUND)

DTC B1661/44 Roll Over Cut Off Indicator Malfunction


DESCRIPTION

The curtain shield airbag cutoff switch is a mechanism that operates both the right and left sides of the curtain shield airbag and the front seat outer belt when the center airbag sensor detects a roll-over.
The RSCA OFF indicator is installed in the combination meter.
If the curtain shield airbag cutoff switch is operated, the indicator comes on to inform the drive that the roll-over detection system is not working.
The initial setting of the roll-over detection system is on. It automatically operates every time the ignition switch is turned to ON.

DTC Code
DTC Detection Condition
Trouble Area
B1661/44
When one of the following conditions is met:
  1. The center airbag sensor receives an open signal or short to ground in the RSCA OFF indicator circuit.
  2. An RSCA OFF indicator malfunction.
  3. A center airbag sensor malfunction.
  1. Combination meter assembly
  2. Curtain shield airbag cutoff switch
  3. Center airbag sensor assembly
  4. Instrument panel wire
  5. No. 3 instrument panel wire

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1661/44 Roll Over Cut Off Indicator Malfunction


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).
1.CHECK COMBINATION METER (SOURCE VOLTAGE)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1661/44 Roll Over Cut Off Indicator Malfunction

  1. Turn the ignition switch off.

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

  1. Remove the combination meter with the connector connected.

  1. Disconnect the connector from 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.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E7-11 (R/O) - Body ground
    		Ignition switch ON
    		11 to 14 V

  1. Turn the ignition switch off.



NG
GO TO METER / GAUGE SYSTEM (Click here)
OK


2.CHECK RSCA OFF INDICATOR CIRCUIT


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


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1661/44 Roll Over Cut Off Indicator Malfunction

  1. Disconnect the connector from the combination meter.

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

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E7-11 (R/O) - 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. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E7-11 (R/O) - E47-15 (RMIL)
    		Always
    		Below 1 Ω
    E7-11 (R/O) - Body ground
    		Always
    		1 MΩ or higher


NG
REPLACE INSTRUMENT PANEL WIRE
OK


3.INSPECT CURTAIN SHIELD AIRBAG CUTOFF SWITCH


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1661/44 Roll Over Cut Off Indicator Malfunction

  1. Remove the curtain shield airbag cutoff switch (Click here).

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    4 - 1
    		Curtain shield airbag cutoff switch is in on position
    		Below 1 Ω
    4 - 1
    		Curtain shield airbag cutoff switch is in off position
    		1 MΩ or higher


NG
REPLACE CURTAIN SHIELD AIRBAG CUTOFF SWITCH (Click here)
OK


4.CHECK CURTAIN SHIELD AIRBAG CUTOFF SWITCH CIRCUIT


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


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1661/44 Roll Over Cut Off Indicator Malfunction

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G3-4 - Body ground
    		Ignition switch ON
    		Below 1 V
    G3-1 - 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. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E47-14 (RMSW) - G3-4
    		Always
    		Below 1 Ω
    G3-4 - Body ground
    		Always
    		1 MΩ or higher
    G3-1 - Body ground
    		Always
    		Below 1 Ω


NG
Go to step 5
OK

REPLACE CENTER AIRBAG SENSOR ASSEMBLY (Click here)

5.CHECK INSTRUMENT PANEL WIRE (INSTRUMENT PANEL WIRE - NO. 3 INSTRUMENT PANEL WIRE AND BODY GROUND)


  1. Disconnect the instrument panel wire connector from the No. 3 instrument panel wire.


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1661/44 Roll Over Cut Off Indicator Malfunction

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

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    GE2-20 - 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. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E47-14 (RMSW) - GE2-20
    		Always
    		Below 1 Ω
    GE2-20 - Body ground
    		Always
    		1 MΩ or higher


NG
REPLACE INSTRUMENT PANEL WIRE
OK

REPLACE NO. 3 INSTRUMENT PANEL WIRE