Dtc B1660/43 Passenger Airbag On/Off Indicator Circuit Malfunction

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION

CHECK CONNECTION OF CONNECTORS

CHECK CONNECTORS

CHECK PASSENGER AIRBAG ON/OFF INDICATOR

CHECK CENTER AIRBAG SENSOR

CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT

CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - NO. 2 INSTRUMENT PANEL WIRE)

CHECK CONNECTION OF CONNECTORS

CHECK CONNECTORS

CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT

CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE)

CHECK PASSENGER AIRBAG ON/OFF INDICATOR

CHECK CENTER AIRBAG SENSOR

CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - NO. 2 INSTRUMENT PANEL WIRE)

DTC B1660/43 Passenger Airbag ON/OFF Indicator Circuit Malfunction


DESCRIPTION

The passenger airbag ON/OFF indicator circuit consists of the center airbag sensor and the passenger airbag ON/OFF indicator.
The passenger airbag ON/OFF indicator indicates the operation condition of the front passenger airbag, front passenger side knee airbag, front seat airbag RH and front seat outer belt RH.
DTC B1660/43 is stored when a malfunction is detected in the passenger airbag ON/OFF indicator circuit.

DTC Code
DTC Detection Condition
Trouble Area
B1660/43
When one of the following conditions is met:
  1. The center airbag sensor receives an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the passenger airbag ON/OFF indicator circuit for 2 seconds.
  2. A passenger airbag ON/OFF indicator malfunction.
  3. A center airbag sensor malfunction.
  1. Instrument panel wire
  2. Multi-Media Module Receiver Assembly*1
  3. Clock*2
  4. Center airbag sensor assembly
  5. No. 2 instrument panel wire
HINT:
*1: w/ Navigation System
*2: w/o Navigation System

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1660/43 Passenger Airbag On/Off Indicator Circuit Malfunction


Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1660/43 Passenger Airbag On/Off Indicator Circuit 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).
  3. After replacing the center airbag sensor assembly, refer to initialization (Click here).
1.CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION


  1. Turn the ignition switch to ON.


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1660/43 Passenger Airbag On/Off Indicator Circuit Malfunction

  1. Check the passenger airbag ON/OFF indicator operation.

    HINT:
    Refer to the normal condition of the passenger airbag ON/OFF indicator (Click here).
    Result
    Result
    		Proceed to
    Always on
    		A
    Off
    		B


B
Go to step 8
A


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 the multi-media module receiver assembly or clock.

    OK:
    The connectors are properly connected.


NG
CONNECT CONNECTORS PROPERLY
OK


3.CHECK CONNECTORS

  1. Disconnect the connectors from the center airbag sensor and the multi-media module receiver assembly or clock.

  1. Check that the connectors (on the center airbag sensor side and multi-media module receiver assembly side or clock side) are not damaged.

    OK:
    The connectors are not deformed or damaged.


NG
REPLACE HARNESS AND CONNECTOR
OK


4.CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    Land Cruiser. Urj200, 202 Grj200 Vdj200

  1. Connect the connector to the multi-media module receiver assembly or clock.

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

  1. Turn the ignition switch to ON.

  1. Check the passenger airbag ON/OFF indicator operation.

    OK:
    The passenger airbag ON/OFF indicator does not come on.


NG
Go to step 6
OK


5.CHECK CENTER AIRBAG SENSOR


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1660/43 Passenger Airbag On/Off Indicator Circuit Malfunction

  1. Connect the connector to 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 B1660 is not output.
    HINT:
    Codes other than DTC B1660 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)

6.CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT


  1. Turn the ignition switch off.


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1660/43 Passenger Airbag On/Off Indicator Circuit Malfunction

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

  1. Disconnect the connector from the center airbag sensor and multi-media module receiver assembly or clock.

  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:
    w/ Navigation System
    Tester Connection
    		Switch Condition
    		Specified Condition
    F77-34 (ARON) - Body ground
    		Ignition switch ON
    		Below 1 V
    F77-33 (AIR) - Body ground
    		Ignition switch ON
    		Below 1 V
    w/o Navigation System
    Tester Connection
    		Switch Condition
    		Specified Condition
    g2-16 (PAON) - Body ground
    		Ignition switch ON
    		Below 1 V
    g2-15 (P-AB) - 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 23 (PAON) and 17 (P-AB) 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:
    w/ Navigation System
    Tester Connection
    		Condition
    		Specified Condition
    F77-34 (ARON) - F77-33 (AIR)
    		Always
    		Below 1 Ω
    w/o Navigation System
    Tester Connection
    		Condition
    		Specified Condition
    g2-16 (PAON) - g2-15 (P-AB)
    		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:
    w/ Navigation System
    Tester Connection
    		Condition
    		Specified Condition
    F77-34 (ARON) - F77-33 (AIR)
    		Always
    		1 MΩ or higher
    F77-34 (ARON) - Body ground
    		Always
    		1 MΩ or higher
    F77-33 (AIR) - Body ground
    		Always
    		1 MΩ or higher
    w/o Navigation System
    Tester Connection
    		Condition
    		Specified Condition
    g2-16 (PAON) - g2-15 (P-AB)
    		Always
    		1 MΩ or higher
    g2-16 (PAON) - Body ground
    		Always
    		1 MΩ or higher
    g2-15 (P-AB) - Body ground
    		Always
    		1 MΩ or higher
    Result
    Result
    		Proceed to
    OK (w/ Navigation System)
    		A
    OK (w/o Navigation System)
    		B
    NG
    		C


B
REPLACE CLOCK (Click here)

C
Go to step 7
A

REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY (Click here)

7.CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - NO. 2 INSTRUMENT PANEL WIRE)


  1. Disconnect the instrument panel wire connector from the No. 2 instrument panel wire.


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1660/43 Passenger Airbag On/Off Indicator Circuit Malfunction

  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
    FE4-11 (PAON) - Body ground
    		Ignition switch ON
    		Below 1 V
    FE4-1 (P-AB) - 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 23 (PAON) and 17 (P-AB) 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
    FE4-11 (PAON) - FE4-1 (P-AB)
    		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
    FE4-11 (PAON) - FE4-1 (P-AB)
    		Always
    		1 MΩ or higher
    FE4-11 (PAON) - Body ground
    		Always
    		1 MΩ or higher
    FE4-1 (P-AB) - Body ground
    		Always
    		1 MΩ or higher


NG
REPLACE INSTRUMENT PANEL WIRE
OK

REPLACE NO. 2 INSTRUMENT PANEL WIRE

8.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 the multi-media module receiver assembly or clock.

    OK:
    The connectors are properly connected.


NG
CONNECT CONNECTORS PROPERLY
OK


9.CHECK CONNECTORS

  1. Disconnect the connectors from the center airbag sensor and the multi-media module receiver assembly or clock.

  1. Check that the connectors (on the center airbag sensor side and multi-media module receiver assembly side or clock side) are not damaged.

    OK:
    The connectors are not deformed or damaged.


NG
REPLACE HARNESS AND CONNECTOR
OK


10.CHECK PASSENGER AIRBAG ON/OFF INDICATOR 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 B1660/43 Passenger Airbag On/Off Indicator Circuit Malfunction

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

    Standard Voltage:
    w/ Navigation System
    Tester Connection
    		Switch Condition
    		Specified Condition
    F77-34 (ARON) - Body ground
    		Ignition switch ON
    		Below 1 V
    F77-33 (AIR) - Body ground
    		Ignition switch ON
    		Below 1 V
    w/o Navigation System
    Tester Connection
    		Switch Condition
    		Specified Condition
    g2-16 (PAON) - Body ground
    		Ignition switch ON
    		Below 1 V
    g2-15 (P-AB) - 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 23 (PAON) and 17 (P-AB) 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:
    w/ Navigation System
    Tester Connection
    		Condition
    		Specified Condition
    F77-34 (ARON) - F77-33 (AIR)
    		Always
    		Below 1 Ω
    w/o Navigation System
    Tester Connection
    		Condition
    		Specified Condition
    g2-16 (PAON) - g2-15 (P-AB)
    		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:
    w/ Navigation System
    Tester Connection
    		Condition
    		Specified Condition
    F77-34 (ARON) - F77-33 (AIR)
    		Always
    		1 MΩ or higher
    F77-34 (ARON) - Body ground
    		Always
    		1 MΩ or higher
    F77-33 (AIR) - Body ground
    		Always
    		1 MΩ or higher
    w/o Navigation System
    Tester Connection
    		Condition
    		Specified Condition
    g2-16 (PAON) - g2-15 (P-AB)
    		Always
    		1 MΩ or higher
    g2-16 (PAON) - Body ground
    		Always
    		1 MΩ or higher
    g2-15 (P-AB) - Body ground
    		Always
    		1 MΩ or higher


NG
Go to step 14
OK


11.CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1660/43 Passenger Airbag On/Off Indicator Circuit Malfunction

  1. Turn the ignition switch off.

  1. Connect the connectors to the center airbag sensor.

  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:
    w/ Navigation System
    Tester Connection
    		Switch Condition
    		Specified Condition
    F77-15 (IG) - Body ground
    		Ignition switch ON
    		11 to 14 V
    w/o Navigation System
    Tester Connection
    		Switch Condition
    		Specified Condition
    g2-9 (IG+) - Body ground
    		Ignition switch ON
    		11 to 14 V
    Result
    Result
    		Proceed to
    OK
    		A
    NG (w/ Navigation System)
    		B
    NG (w/o Navigation System)
    		C


B
REPLACE HARNESS AND CONNECTOR (MULTI-DISPLAY - BATTERY) OR BATTERY

C
REPLACE HARNESS AND CONNECTOR (CLOCK - BATTERY) OR BATTERY
A


12.CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1660/43 Passenger Airbag On/Off Indicator Circuit Malfunction

  1. Turn the ignition switch off.

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

  1. Connect the connector to the multi-media module receiver assembly or clock.

  1. Disconnect the connectors from the center airbag sensor.

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

  1. Check the indicator according to the table below.

    OK:
    Tester Connection
    		Switch Condition
    		Passenger airbag ON/OFF indicator
    E47-23 (PAON) - Body ground
    		Ignition switch ON
    		"ON" comes on
    E47-17 (P-AB) - Body ground
    		Ignition switch ON
    		"OFF" comes on
    Result
    Result
    		Proceed to
    OK
    		A
    NG (w/ Navigation System)
    		B
    NG (w/o Navigation System)
    		C


B
REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY (Click here)

C
REPLACE CLOCK (Click here)
A


13.CHECK CENTER AIRBAG SENSOR


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1660/43 Passenger Airbag On/Off Indicator Circuit Malfunction

  1. Turn the ignition switch off.

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

  1. Connect the connectors to 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 B1660 is not output.
    HINT:
    Codes other than DTC B1660 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)

14.CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - NO. 2 INSTRUMENT PANEL WIRE)


  1. Disconnect the instrument panel wire connector from the No. 2 instrument panel wire.


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System. Dtc B1660/43 Passenger Airbag On/Off Indicator Circuit Malfunction

  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
    FE4-11 (PAON) - Body ground
    		Ignition switch ON
    		Below 1 V
    FE4-1 (P-AB) - 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 23 (PAON) and 17 (P-AB) 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
    FE4-11 (PAON) - FE4-1 (P-AB)
    		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
    FE4-11 (PAON) - FE4-1 (P-AB)
    		Always
    		1 MΩ or higher
    FE4-11 (PAON) - Body ground
    		Always
    		1 MΩ or higher
    FE4-1 (P-AB) - Body ground
    		Always
    		1 MΩ or higher


NG
REPLACE INSTRUMENT PANEL WIRE
OK

REPLACE NO. 2 INSTRUMENT PANEL WIRE