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

for Preparation Click here


DESCRIPTION

The passenger airbag ON/OFF indicator circuit consists of the center airbag sensor assembly and the passenger airbag ON/OFF indicator.
The passenger airbag ON/OFF indicator indicates the operation condition of the front passenger airbag and SRS seat cushion airbag.
DTC B1660/43 is recorded when a malfunction is detected in the passenger airbag ON/OFF indicator circuit.

DTC No.
DTC Detection Condition
Trouble Area
B1660/43
When one of following conditions is met:
  1. The center airbag sensor assembly 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. Passenger airbag ON/OFF indicator malfunction
  3. Center airbag sensor assembly malfunction
  1. Instrument panel wire
  2. Telltale light assembly (Passenger airbag ON/OFF indicator)
  3. Center airbag sensor assembly

WIRING DIAGRAM


C146242E18


INSPECTION PROCEDURE

1.CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION

  1. Turn the ignition switch to ON.



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

    HINT:
    Refer to the normal condition of the passenger airbag ON/OFF indicator (Click here).


    C123768E26

    Result 
    ON/OFF Indicator Illumination
    		Proceed to
    Always ON
    		A
    OFF
    		B



B
Go to step 7
A


2.CHECK CONNECTION OF CONNECTORS

  1. Turn the ignition switch off.

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

  1. Check that the connectors are properly connected to the center airbag sensor assembly and the telltale light assembly.

    OK:
    The connectors are properly connected.



NG
CONNECT CONNECTORS PROPERLY
OK


3.CHECK CONNECTORS

  1. Disconnect the connectors from the center airbag sensor assembly and the telltale light assembly.

  1. Check that the connectors (on the center airbag sensor assembly side and telltale light assembly side) are not damaged.

    OK:
    The connectors are not deformed or damaged.



NG
REPLACE INSTRUMENT PANEL WIRE
OK


4.CHECK PASSENGER AIRBAG ON/OFF INDICATOR
C195575E01

  1. Connect the connector to the telltale light assembly.

  1. Connect the negative (-) terminal cable to the battery, 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.

    Text in Illustration 
    *1
    		w/ Audio
    *2
    		w/o Audio



NG
Go to step 6
OK


5.CHECK CENTER AIRBAG SENSOR ASSEMBLY
C146229E34

  1. Connect the connector to the center airbag sensor assembly.

  1. Connect the negative (-) terminal cable to the battery, 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 the memory (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 B1660/43 is not output.

    Text in Illustration 
    *1
    		Telltale Light Assembly
    *2
    		Center Airbag Sensor Assembly

    HINT:
    DTCs other than B1660/43 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 INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - TELLTALE LIGHT)

C196963E01


Text in Illustration 
*1
Front view of wire harness connector
(to Telltale Light Assembly)
*5
Instrument Panel Wire
*2
Rear view of wire harness connector
(to Center Airbag Sensor Assembly)
*6
Connector C
*3
Telltale Light Assembly
*7
Connector B
*4
Center Airbag Sensor Assembly
*8
Service Wire

  1. Turn the ignition switch off.

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

  1. Disconnect the connectors from the telltale light assembly and center airbag sensor assembly.

  1. Using a service wire, connect terminals 23 (PAON) and 17 (P-AB) of connector B.

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

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D65-1 (PAON) - D65-2 (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
    D65-1 (PAON) - D65-2 (P-AB)
    		Always
    		1 MΩ or higher
    D65-1 (PAON) - Body ground
    		Always
    		1 MΩ or higher
    D65-2 (P-AB) - Body ground
    		Always
    		1 MΩ or higher

  1. Connect the negative (-) terminal cable to the battery, 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
    D65-1 (PAON) - Body ground
    		Ignition switch ON
    		Below 1 V
    D65-2 (P-AB) - Body ground
    		Ignition switch ON
    		Below 1 V



NG
REPLACE INSTRUMENT PANEL WIRE
OK

REPLACE TELLTALE LIGHT ASSEMBLY (Click here)  

7.CHECK CONNECTION OF CONNECTORS

  1. Turn the ignition switch off.

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

  1. Check that the connectors are properly connected to the center airbag sensor assembly and the telltale light assembly.

    OK:
    The connectors are properly connected.



NG
CONNECT CONNECTORS PROPERLY
OK


8.CHECK CONNECTORS

  1. Disconnect the connectors from the center airbag sensor assembly and the telltale light assembly.

  1. Check that the connectors (on the center airbag sensor assembly side and telltale light assembly side) are not damaged.

    OK:
    The connectors are not deformed or damaged.



NG
REPLACE INSTRUMENT PANEL WIRE
OK


9.CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - TELLTALE LIGHT)

C196963E01


Text in Illustration 
*1
Front view of wire harness connector
(to Telltale Light Assembly)
*5
Instrument Panel Wire
*2
Rear view of wire harness connector
(to Center Airbag Sensor Assembly)
*6
Connector C
*3
Telltale Light Assembly
*7
Connector B
*4
Center Airbag Sensor Assembly
*8
Service Wire

  1. Turn the ignition switch off.

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

  1. Disconnect the connectors from the telltale light assembly and center airbag sensor assembly.

  1. Using a service wire, connect terminals 23 (PAON) and 17 (P-AB) of connector B.

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

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D65-1 (PAON) - D65-2 (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
    D65-1 (PAON) - D65-2 (P-AB)
    		Always
    		1 MΩ or higher
    D65-1 (PAON) - Body ground
    		Always
    		1 MΩ or higher
    D65-2 (P-AB) - Body ground
    		Always
    		1 MΩ or higher

  1. Connect the negative (-) terminal cable to the battery, 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
    D65-1 (PAON) - Body ground
    		Ignition switch ON
    		Below 1 V
    D65-2 (P-AB) - Body ground
    		Ignition switch ON
    		Below 1 V



NG
REPLACE INSTRUMENT PANEL WIRE
OK


10.CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE)
C196964E01

  1. Connect the connectors to the center airbag sensor assembly.

  1. Connect the negative (-) terminal cable to the battery, 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
    D65-6 (IG+) - Body ground
    		Ignition switch ON
    		11 to 14 V

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Telltale Light Assembly)



NG
REPLACE HARNESS AND CONNECTOR (TELLTALE LIGHT - BATTERY)
OK


11.CHECK PASSENGER AIRBAG ON/OFF INDICATOR
C196965E01

  1. Turn the ignition switch off.

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

  1. Connect the connector to the telltale light assembly.

  1. Disconnect the connectors from the center airbag sensor assembly.

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

  1. Turn the ignition switch to ON.

  1. Check the indicator according to the value(s) in the table below.

    OK:
    Tester Connection
    		Switch Condition
    		Passenger airbag ON/OFF indicator
    D43-23 (PAON) - Body ground
    		Ignition switch ON
    		"ON" comes on
    D43-17 (P-AB) - Body ground
    		Ignition switch ON
    		"OFF" comes on

    Text in Illustration 
    *1
    		Rear view of wire harness connector
    (to Center Airbag Sensor Assembly)



NG
REPLACE TELLTALE LIGHT ASSEMBLY (Click here)
OK


12.CHECK CENTER AIRBAG SENSOR ASSEMBLY
C146229E34

  1. Turn the ignition switch off.

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

  1. Connect the connectors to the center airbag sensor assembly.

  1. Connect the negative (-) terminal cable to the battery 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 the memory (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 B1660/43 is not output.

    Text in Illustration 
    *1
    		Telltale Light Assembly
    *2
    		Center Airbag Sensor Assembly

    HINT:
    DTCs other than B1660/43 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)