DTC    B1638/82    Passenger Side Rear Airbag Sensor Initialization Incomplete

for Preparation Click here


DESCRIPTION

The circuit for the passenger side - side collision sensor (to determine deployment of the curtain shield airbag (passenger side)) is composed of the center airbag sensor assembly and passenger side - side airbag sensor (for rear side).
The passenger side - side airbag sensor (for rear side) detect impacts to the vehicle and send signals to the center airbag sensor assembly to determine if the airbag should be deployed.
DTC B1638/82 is recorded when a malfunction is detected in the circuit for the passenger side - side collision sensor (to determine deployment of the curtain shield airbag (passenger side)).

DTC No.
DTC Detection Condition
Trouble Area
B1638/82
When one of following conditions is met:
  1. The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the circuit for the passenger side - side collision sensor (to determine deployment of the curtain shield airbag (passenger side)) for 2 seconds.
  2. Passenger side - side airbag sensor (for front side) malfunction
  3. Passenger side - side airbag sensor (for rear side) malfunction
  4. Passenger side rear airbag sensor
  5. Center airbag sensor assembly malfunction
  1. Floor wire
  2. Front door wire (passenger side)
  3. Passenger side - side airbag sensor (for front side)
  4. Passenger side - side airbag sensor (for rear side)
  5. Passenger side rear airbag sensor
  6. Center airbag sensor assembly

WIRING DIAGRAM


C195582E18


C195582E08


INSPECTION PROCEDURE

1.CHECK PAST DTC

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

  1. Turn the ignition switch off.

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

  1. Check the past DTCs (Click here).
    Result 
    Result
    		Proceed to
    DTC B1632/81 is output
    		A
    DTC B1637/82 is output
    		B
    DTC B1632/81 and B1637/82 are not output
    		C



A
GO TO DTC B1632/81 (Click here)

B
GO TO DTC B1637/82 (Click here)
C


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 passenger side - side airbag sensor (for front side).

    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 passenger side - side airbag sensor (for front side).

  1. Check that the connectors (on the center airbag sensor assembly side and passenger side - side airbag sensor (for front side) side) are not damaged.

    OK:
    The connectors are not deformed or damaged.



NG
REPLACE HARNESS AND CONNECTOR
OK


4.CHECK PASSENGER SIDE - SIDE AIRBAG SENSOR (FOR FRONT SIDE)


    C229912E02

  1. Interchange the passenger side - side airbag sensor (for front side) with the driver side - side airbag sensor (for front side) and connect the connectors to them.

  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 90 seconds.

  1. Check for DTCs (Click here).
    Result 
    Result
    		Proceed to
    DTC B1633/81 is output
    		A
    DTC B1633/81 and B1638/82 are not output
    		B
    DTC B1638/82 is output
    		C
    Text in Illustration 
    *A
    		for LHD
    *B
    		for RHD
    *a
    		Driver Side - Side Airbag Sensor (for Front Side)
    *b
    		Center Airbag Sensor Assembly



A
REPLACE PASSENGER SIDE - SIDE AIRBAG SENSOR (FOR FRONT SIDE) (Click here)

B
USE SIMULATION METHOD TO CHECK (Click here)
C


5.CHECK PASSENGER SIDE - SIDE AIRBAG SENSOR (FOR REAR SIDE) CIRCUIT

C195584E08


Text in Illustration 
*A
for LHD
*B
for RHD
*a
Rear view of wire harness connector
(to Passenger Side - Side Airbag Sensor (for Front Side))
*b
Rear view of wire harness connector
(to Passenger Side - Side Airbag Sensor (for Rear Side))
*c
Passenger Side - Side Airbag Sensor (for Front Side)
*d
Passenger Side - Side Airbag Sensor (for Rear Side)
*e
Connector E
*f
Connector B
*g
Service Wire
-
-

  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:
    for LHD 
    Tester Connection
    		Switch Condition
    		Specified Condition
    G16-4 (BCR+) - Body ground
    		Ignition switch ON
    		Below 1 V
    G16-3 (BCR-) - Body ground
    		Ignition switch ON
    		Below 1 V
    for RHD 
    Tester Connection
    		Switch Condition
    		Specified Condition
    G17-4 (BCL+) - Body ground
    		Ignition switch ON
    		Below 1 V
    G17-3 (BCL-) - Body ground
    		Ignition switch ON
    		Below 1 V

  1. Turn the ignition switch off.

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

  1. Using a service wire, connect terminals 1 and 2 of connector E.

    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:
    for LHD 
    Tester Connection
    		Condition
    		Specified Condition
    G16-4 (BCR+) - G16-3 (BCR-)
    		Always
    		Below 1 Ω
    for RHD 
    Tester Connection
    		Condition
    		Specified Condition
    G17-4 (BCL+) - G17-3 (BCL-)
    		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:
    for LHD 
    Tester Connection
    		Condition
    		Specified Condition
    G16-4 (BCR+) - G16-3 (BCR-)
    		Always
    		1 MΩ or higher
    G16-4 (BCR+) - Body ground
    		Always
    		1 MΩ or higher
    G16-3 (BCR-) - Body ground
    		Always
    		1 MΩ or higher
    for RHD 
    Tester Connection
    		Condition
    		Specified Condition
    G17-4 (BCL+) - G17-3 (BCL-)
    		Always
    		1 MΩ or higher
    G17-4 (BCL+) - Body ground
    		Always
    		1 MΩ or higher
    G17-3 (BCL-) - Body ground
    		Always
    		1 MΩ or higher



NG
Go to step 9
OK


6.CHECK PASSENGER SIDE REAR AIRBAG SENSOR CIRCUIT (SIDE AIRBAG SENSOR (FOR REAR SIDE ) - REAR AIRBAG SENSOR)

C195585E07


Text in Illustration 
*A
for LHD
*B
for RHD
*a
Rear view of wire harness connector
(to Passenger Side Rear Airbag Sensor)
*b
Rear view of wire harness connector
(to Passenger Side - Side Airbag Sensor (for Rear Side))
*c
Passenger Side Rear Airbag Sensor
*d
Passenger Side - Side Airbag Sensor (for Rear Side)
*e
Floor Wire
*f
Connector C
*g
Connector B
*h
Service Wire

  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:
    for LHD 
    Tester Connection
    		Switch Condition
    		Specified Condition
    G16-1 (BER+) - Body ground
    		Ignition switch ON
    		Below 1 V
    G16-2 (BER-) - Body ground
    		Ignition switch ON
    		Below 1 V
    for RHD 
    Tester Connection
    		Switch Condition
    		Specified Condition
    G17-1 (BEL+) - Body ground
    		Ignition switch ON
    		Below 1 V
    G17-2 (BEL-) - Body ground
    		Ignition switch ON
    		Below 1 V

  1. Turn the ignition switch off.

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

  1. Using a service wire, connect terminals 2 and 1 of connector C.

    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:
    for LHD 
    Tester Connection
    		Condition
    		Specified Condition
    G16-1 (BER+) - G16-2 (BER-)
    		Always
    		Below 1 Ω
    for RHD 
    Tester Connection
    		Condition
    		Specified Condition
    G17-1 (BEL+) - G17-2 (BEL-)
    		Always
    		Below 1 Ω

  1. Disconnect the service wire from connector C.

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

    Standard Resistance:
    for LHD 
    Tester Connection
    		Condition
    		Specified Condition
    G16-1 (BER+) - G16-2 (BER-)
    		Always
    		1 MΩ or higher
    G16-1 (BER+) - Body ground
    		Always
    		1 MΩ or higher
    G16-2 (BER-) - Body ground
    		Always
    		1 MΩ or higher
    for RHD 
    Tester Connection
    		Condition
    		Specified Condition
    G17-1 (BEL+) - G17-2 (BEL-)
    		Always
    		1 MΩ or higher
    G17-1 (BEL+) - Body ground
    		Always
    		1 MΩ or higher
    G17-2 (BEL-) - Body ground
    		Always
    		1 MΩ or higher



NG
REPLACE FLOOR WIRE
OK


7.CHECK PASSENGER SIDE - SIDE AIRBAG SENSOR (FOR REAR SIDE)
C195583E02

  1. Interchange the passenger side - side airbag sensor (for rear side) with the driver side - side airbag sensor (for rear side) and connect the connectors to them.

  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 90 seconds.

  1. Check for DTCs (Click here).
    Result 
    Result
    		Proceed to
    DTC B1633/81 is output
    		A
    DTC B1633/81 and B1638/82 are not output
    		B
    DTC B1638/82 is output
    		C
    Text in Illustration 
    *a
    		Driver Side - Side Airbag Sensor (for Rear Side)
    *b
    		Passenger Side - Side Airbag Sensor (for Front Side)



A
REPLACE PASSENGER SIDE - SIDE AIRBAG SENSOR (FOR REAR SIDE) (Click here)

B
USE SIMULATION METHOD TO CHECK (Click here)
C


8.CHECK PASSENGER SIDE REAR AIRBAG SENSOR
C148441E15

  1. Interchange the passenger side rear airbag sensor with the driver side rear airbag sensor and connect the connectors to them.

  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 90 seconds.

  1. Check for DTCs (Click here).
    Result 
    Result
    		Proceed to
    DTC B1638/82 is output
    		A
    DTC B1633/81 is output
    		B
    DTC B1633/81 and B1638/82 are not output
    		C
    Text in Illustration 
    *a
    		Driver Side Rear Airbag Sensor
    *b
    		Passenger Side - Side Airbag Sensor (for Rear Side)

    HINT:
    DTCs other than B1633/81 and B1638/82 may be output at this time, but they are not related to this check.



A
REPLACE CENTER AIRBAG SENSOR ASSEMBLY (Click here)

B
REPLACE PASSENGER SIDE REAR AIRBAG SENSOR (Click here)
C

USE SIMULATION METHOD TO CHECK (Click here)  

9.CHECK FLOOR WIRE (SIDE AIRBAG SENSOR (REAR SIDE) - FRONT DOOR WIRE)

C196950E08


Text in Illustration 
*A
for LHD
*B
for RHD
*a
Front view of wire harness connector
(to Front Door Wire (Passenger Side))
*b
Rear view of wire harness connector
(to Passenger Side - Side Airbag Sensor (for Rear Side))
*c
Passenger Side - Side Airbag Sensor (for Front Side)
*d
Passenger Side - Side Airbag Sensor (for Rear Side)
*e
Front Door Wire (Passenger Side)
*f
Floor Wire
*g
Connector C
*h
Connector B
*i
Service Wire
-
-

  1. Disconnect the floor wire connector from the front door wire (passenger side).

  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:
    for LHD 
    Tester Connection
    		Switch Condition
    		Specified Condition
    EG1-3 (BCR+) - Body ground
    		Ignition switch ON
    		Below 1 V
    EG1-4 (BCR-) - Body ground
    		Ignition switch ON
    		Below 1 V
    for RHD 
    Tester Connection
    		Switch Condition
    		Specified Condition
    FG1-3 (BCL+) - Body ground
    		Ignition switch ON
    		Below 1 V
    FG1-4 (BCL-) - Body ground
    		Ignition switch ON
    		Below 1 V

  1. Turn the ignition switch off.

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

  1. Using a service wire, connect terminals 3 and 4 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:
    for LHD 
    Tester Connection
    		Condition
    		Specified Condition
    EG1-3 (BCR+) - EG1-4 (BCR-)
    		Always
    		Below 1 Ω
    for RHD 
    Tester Connection
    		Condition
    		Specified Condition
    FG1-3 (BCL+) - FG1-4 (BCL-)
    		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:
    for LHD 
    Tester Connection
    		Condition
    		Specified Condition
    EG1-3 (BCR+) - EG1-4 (BCR-)
    		Always
    		1 MΩ or higher
    EG1-3 (BCR+) - Body ground
    		Always
    		1 MΩ or higher
    EG1-4 (BCR-) - Body ground
    		Always
    		1 MΩ or higher
    for RHD 
    Tester Connection
    		Condition
    		Specified Condition
    FG1-3 (BCL+) - FG1-4 (BCL-)
    		Always
    		1 MΩ or higher
    FG1-3 (BCL+) - Body ground
    		Always
    		1 MΩ or higher
    FG1-4 (BCL-) - Body ground
    		Always
    		1 MΩ or higher



NG
REPLACE FLOOR WIRE
OK

REPLACE FRONT DOOR WIRE (PASSENGER SIDE)