DTC    B1627/82    Lost communication with Side Airbag Sensor LH

DTC    B1628/82    Side Airbag Sensor Assembly LH Initialization Incomplete

DTC    B1637/82    Lost Communication with Rear Airbag Sensor LH

DTC    B1638/82    Rear Airbag Sensor Assembly LH Initialization Incomplete

DTC    B1647/82    Lost Communication with Side Satellite Sensor Bus LH

for Preparation Click here


DESCRIPTION

The side collision sensor LH circuit (to determine deployment of the front seat airbag assembly LH and curtain shield airbag assembly LH) is composed of the airbag sensor assembly, side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.
The side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH detect impacts to the vehicle and send signals to the airbag sensor assembly to determine if the airbag should be deployed.
These DTCs are stored when a malfunction is detected in the side collision sensor LH circuit (to determine deployment of the front seat airbag assembly LH and curtain shield airbag assembly LH).

DTC No.
DTC Detection Condition
Trouble Area
B1627/82
B1628/82
B1637/82
B1638/82
B1647/82
  1. The 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 side collision sensor LH circuit (to determine deployment of the front seat airbag assembly LH and curtain shield airbag assembly LH).
  2. Side airbag sensor assembly LH malfunction
  3. No. 2 side airbag sensor assembly LH malfunction
  4. Airbag sensor assembly malfunction
  1. Floor wire
  2. Side airbag sensor assembly LH
  3. No. 2 side airbag sensor assembly LH
  4. Airbag sensor assembly

WIRING DIAGRAM


C165789E45


INSPECTION PROCEDURE

NOTICE:
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work (Click here).

1.CHECK CURRENT DTC

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Check for current DTCs (Click here).

    Result:
    Result
    		Proceed to
    Current DTC B1628 is output.
    		A
    Current DTC B1647 or 82 is output.
    		B
    Current DTC B1637 or B1638 is output.
    		C
    Current DTC B1627 is output.
    		D
    Current DTCs B1627, B1628, B1637, B1638, B1647 and 82 are not output.
    		E

    HINT:
    1. DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the power switch off and then on (IG) again.
    2. Codes other than current DTCs B1627, B1628, B1637, B1638, B1647 and 82 may be output at this time, but they are not related to this check.



B
Go to step 3

C
Go to step 14

D
Go to step 21

E
USE SIMULATION METHOD TO CHECK (Click here)
A


2.CHECK HISTORY DTC

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Check for history DTCs (Click here).

    Result:
    Result
    		Proceed to
    History DTC B1627 is not output.
    		A
    History DTC B1627 is output.
    		B

    HINT:
    Codes other than history DTC B1627 may be output at this time, but they are not related to this check.



B
Go to step 14
A


3.CHECK CONNECTORS

  1. Turn the power switch off.

  1. Disconnect the cable from the negative (-) auxiliary battery terminal.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

  1. Check that the connectors are properly connected to the airbag sensor assembly, side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.

    OK:
    The connectors are properly connected.

    HINT:
    If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

  1. Disconnect the connectors from the airbag sensor assembly, side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.

  1. Check that the terminals of the connectors are not damaged.

    OK:
    The terminals are not deformed or damaged.



NG
REPLACE FLOOR WIRE
OK


4.CHECK FLOOR WIRE (OPEN)


  1. Using SST, connect terminals 8 (BBL+) and 15 (BBL-) of connector B.


    C203026E14

    NOTICE:
    Do not forcibly insert SST into the terminals of the connector when connecting.

SST
09843-18040  

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    P7-4 (BBL+) - P7-3 (BBL-)
    		Always
    		Below 1 Ω


    Text in Illustration 
    *1
    		Side Airbag Sensor Assembly LH
    		*2
    		Airbag Sensor Assembly
    *3
    		Floor Wire
    		*4
    		Connector B
    *5
    		Connector C
    		-
    		-
    *a
    		Front view of wire harness connector
    (to Airbag Sensor Assembly)
    		*b
    		Front view of wire harness connector
    (to Side Airbag Sensor Assembly LH)



NG
REPLACE FLOOR WIRE
OK


5.CHECK FLOOR WIRE (SHORT)


    C203027E13

  1. Disconnect SST from connector B.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    P7-4 (BBL+) - P7-3 (BBL-)
    		Always
    		1 MΩ or higher

    Text in Illustration 
    *1
    		Side Airbag Sensor Assembly LH
    *2
    		Airbag Sensor Assembly
    *3
    		Floor Wire
    *4
    		Connector C
    *a
    		Front view of wire harness connector
    (to Side Airbag Sensor Assembly LH)



NG
REPLACE FLOOR WIRE
OK


6.CHECK FLOOR WIRE (SHORT TO B+)


    C203027E13

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

  1. Turn the power switch on (IG).

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    P7-4 (BBL+) - Body ground
    		Power switch on (IG)
    		Below 1 V
    P7-3 (BBL-) - Body ground
    		Power switch on (IG)
    		Below 1 V

    Text in Illustration 
    *1
    		Side Airbag Sensor Assembly LH
    *2
    		Airbag Sensor Assembly
    *3
    		Floor Wire
    *4
    		Connector C
    *a
    		Front view of wire harness connector
    (to Side Airbag Sensor Assembly LH)



NG
REPLACE FLOOR WIRE
OK


7.CHECK FLOOR WIRE (SHORT TO GROUND)


    C203027E13

  1. Turn the power switch off.

  1. Disconnect the cable from the negative (-) auxiliary battery terminal.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    P7-4 (BBL+) - Body ground
    		Always
    		1 MΩ or higher
    P7-3 (BBL-) - Body ground
    		Always
    		1 MΩ or higher

    Text in Illustration 
    *1
    		Side Airbag Sensor Assembly LH
    *2
    		Airbag Sensor Assembly
    *3
    		Floor Wire
    *4
    		Connector C
    *a
    		Front view of wire harness connector
    (to Side Airbag Sensor Assembly LH)



NG
REPLACE FLOOR WIRE
OK


8.CHECK FLOOR WIRE (OPEN)


  1. Using SST, connect terminals 2 (BCL+) and 1 (BCL-) of connector C.


    C213490E12

    NOTICE:
    Do not forcibly insert SST into the terminals of the connector when connecting.

SST
09843-18040  

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    P7-1 (BCL+) - P7-2 (BCL-)
    		Always
    		Below 1 Ω


    Text in Illustration 
    *1
    		No. 2 Side Airbag Sensor Assembly LH
    		*2
    		Side Airbag Sensor Assembly LH
    *3
    		Floor Wire
    		*4
    		Connector B
    *5
    		Connector C
    		-
    		-
    *a
    		Front view of wire harness connector
    (to Side Airbag Sensor Assembly LH)
    		*b
    		Front view of wire harness connector
    (to No. 2 Side Airbag Sensor Assembly LH)



NG
REPLACE FLOOR WIRE
OK


9.CHECK FLOOR WIRE (SHORT)


    C213489E12

  1. Disconnect SST from connector C.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    P7-1 (BCL+) - P7-2 (BCL-)
    		Always
    		1 MΩ or higher

    Text in Illustration 
    *1
    		No. 2 Side Airbag Sensor Assembly LH
    *2
    		Side Airbag Sensor Assembly LH
    *3
    		Floor Wire
    *4
    		Connector B
    *a
    		Front view of wire harness connector
    (to Side Airbag Sensor Assembly LH)



NG
REPLACE FLOOR WIRE
OK


10.CHECK FLOOR WIRE (SHORT TO B+)


    C213489E12

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

  1. Turn the power switch on (IG).

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    P7-1 (BCL+) - Body ground
    		Power switch on (IG)
    		Below 1 V
    P7-2 (BCL-) - Body ground
    		Power switch on (IG)
    		Below 1 V

    Text in Illustration 
    *1
    		No. 2 Side Airbag Sensor Assembly LH
    *2
    		Side Airbag Sensor Assembly LH
    *3
    		Floor Wire
    *4
    		Connector B
    *a
    		Front view of wire harness connector
    (to Side Airbag Sensor Assembly LH)



NG
REPLACE FLOOR WIRE
OK


11.CHECK FLOOR WIRE (SHORT TO GROUND)


    C213489E12

  1. Turn the power switch off.

  1. Disconnect the cable from the negative (-) auxiliary battery terminal.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    P7-1 (BCL+) - Body ground
    		Always
    		1 MΩ or higher
    P7-2 (BCL-) - Body ground
    		Always
    		1 MΩ or higher

    Text in Illustration 
    *1
    		No. 2 Side Airbag Sensor Assembly LH
    *2
    		Side Airbag Sensor Assembly LH
    *3
    		Floor Wire
    *4
    		Connector B
    *a
    		Front view of wire harness connector
    (to Side Airbag Sensor Assembly LH)



NG
REPLACE FLOOR WIRE
OK


12.CHECK SIDE AIRBAG SENSOR ASSEMBLY LH


    C166120E08

  1. Connect the connectors to the No. 2 side airbag sensor assembly LH and airbag sensor assembly.

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

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

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Clear the DTCs stored in memory (Click here).

  1. Turn the power switch off.

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Check for DTCs (Click here).

    Result:
    Result
    		Proceed to
    DTC B1628, B1647 or 82 is output.
    		A
    DTC B1623, B1642 or 81 is output.
    		B
    DTCs B1623, B1628, B1642, B1647, 81 and 82 are not output.
    		C

    Text in Illustration 
    *1
    		Side Airbag Sensor Assembly RH
    *2
    		Airbag Sensor Assembly

    HINT:
    Codes other than DTCs B1623, B1628, B1642, B1647, 81 and 82 may be output at this time, but they are not related to this check.



B
REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH (Click here)

C
USE SIMULATION METHOD TO CHECK (Click here)
A


13.CHECK NO. 2 SIDE AIRBAG SENSOR ASSEMBLY LH


    C166174E16

  1. Turn the power switch off.

  1. Disconnect the cable from the negative (-) auxiliary battery terminal.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

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

  1. Interchange the No. 2 side airbag sensor assembly LH with RH and connect the connectors.

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

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Clear the DTCs stored in memory (Click here).

  1. Turn the power switch off.

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Check for DTCs (Click here).

    Result:
    Result
    		Proceed to
    DTCs B1623, B1628, B1642, B1647, 81 and 82 are not output.
    		A
    DTC B1628, B1647 or 82 is output.
    		B
    DTC B1623, B1642 or 81 is output.
    		C

    Text in Illustration 
    *1
    		No. 2 Side Airbag Sensor Assembly RH
    *2
    		Side Airbag Sensor Assembly LH

    HINT:
    Codes other than DTCs B1623, B1628, B1642, B1647, 81 and 82 may be output at this time, but they are not related to this check.



B
REPLACE AIRBAG SENSOR ASSEMBLY (Click here)

C
REPLACE NO. 2 SIDE AIRBAG SENSOR ASSEMBLY LH (Click here)
A

USE SIMULATION METHOD TO CHECK (Click here)  

14.CHECK CONNECTORS

  1. Turn the power switch off.

  1. Disconnect the cable from the negative (-) auxiliary battery terminal.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

  1. Check that the connectors are properly connected to the side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.

    OK:
    The connectors are properly connected.

    HINT:
    If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

  1. Disconnect the connectors from the side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.

  1. Check that the terminals of the connectors are not damaged.

    OK:
    The terminals are not deformed or damaged.



NG
REPLACE FLOOR WIRE
OK


15.CHECK FLOOR WIRE (OPEN)


  1. Using SST, connect terminals 2 (BCL+) and 1 (BCL-) of connector C.


    C213490E12

    NOTICE:
    Do not forcibly insert SST into the terminals of the connector when connecting.

SST
09843-18040  

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    P7-1 (BCL+) - P7-2 (BCL-)
    		Always
    		Below 1 Ω


    Text in Illustration 
    *1
    		No. 2 Side Airbag Sensor Assembly LH
    		*2
    		Side Airbag Sensor Assembly LH
    *3
    		Floor Wire
    		*4
    		Connector B
    *5
    		Connector C
    		-
    		-
    *a
    		Front view of wire harness connector
    (to Side Airbag Sensor Assembly LH)
    		*b
    		Front view of wire harness connector
    (to No. 2 Side Airbag Sensor Assembly LH)



NG
REPLACE FLOOR WIRE
OK


16.CHECK FLOOR WIRE (SHORT)


    C213489E12

  1. Disconnect SST from connector C.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    P7-1 (BCL+) - P7-2 (BCL-)
    		Always
    		1 MΩ or higher

    Text in Illustration 
    *1
    		No. 2 Side Airbag Sensor Assembly LH
    *2
    		Side Airbag Sensor Assembly LH
    *3
    		Floor Wire
    *4
    		Connector B
    *a
    		Front view of wire harness connector
    (to Side Airbag Sensor Assembly LH)



NG
REPLACE FLOOR WIRE
OK


17.CHECK FLOOR WIRE (SHORT TO B+)


    C213489E12

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

  1. Turn the power switch on (IG).

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    P7-1 (BCL+) - Body ground
    		Power switch on (IG)
    		Below 1 V
    P7-2 (BCL-) - Body ground
    		Power switch on (IG)
    		Below 1 V

    Text in Illustration 
    *1
    		No. 2 Side Airbag Sensor Assembly LH
    *2
    		Side Airbag Sensor Assembly LH
    *3
    		Floor Wire
    *4
    		Connector B
    *a
    		Front view of wire harness connector
    (to Side Airbag Sensor Assembly LH)



NG
REPLACE FLOOR WIRE
OK


18.CHECK FLOOR WIRE (SHORT TO GROUND)


    C213489E12

  1. Turn the power switch off.

  1. Disconnect the cable from the negative (-) auxiliary battery terminal.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    P7-1 (BCL+) - Body ground
    		Always
    		1 MΩ or higher
    P7-2 (BCL-) - Body ground
    		Always
    		1 MΩ or higher

    Text in Illustration 
    *1
    		No. 2 Side Airbag Sensor Assembly LH
    *2
    		Side Airbag Sensor Assembly LH
    *3
    		Floor Wire
    *4
    		Connector B
    *a
    		Front view of wire harness connector
    (to Side Airbag Sensor Assembly LH)



NG
REPLACE FLOOR WIRE
OK


19.CHECK SIDE AIRBAG SENSOR ASSEMBLY LH


    C166120E08

  1. Connect the connector to the No. 2 side airbag sensor assembly LH.

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

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

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Clear the DTCs stored in memory (Click here).

  1. Turn the power switch off.

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Check for DTCs (Click here).

    Result:
    Result
    		Proceed to
    DTC B1637 or B1638 is output.
    		A
    DTC B1632 or B1633 is output.
    		B
    DTCs B1632, B1633, B1637 and B1638 are not output.
    		C

    Text in Illustration 
    *1
    		Side Airbag Sensor Assembly RH
    *2
    		Airbag Sensor Assembly

    HINT:
    Codes other than DTCs B1632, B1633, B1637 and B1638 may be output at this time, but they are not related to this check.



B
REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH (Click here)

C
USE SIMULATION METHOD TO CHECK (Click here)
A


20.CHECK NO. 2 SIDE AIRBAG SENSOR ASSEMBLY LH


    C166174E16

  1. Turn the power switch off.

  1. Disconnect the cable from the negative (-) auxiliary battery terminal.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

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

  1. Interchange the No. 2 side airbag sensor assembly LH with RH and connect the connectors.

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

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Clear the DTCs stored in memory (Click here).

  1. Turn the power switch off.

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Check for DTCs (Click here).

    Result:
    Result
    		Proceed to
    DTCs B1632, B1633, B1637 and B1638 are not output.
    		A
    DTC B1637 or B1638 is output.
    		B
    DTC B1632 or B1633 is output.
    		C

    Text in Illustration 
    *1
    		No. 2 Side Airbag Sensor Assembly RH
    *2
    		Side Airbag Sensor Assembly LH

    HINT:
    Codes other than DTCs B1632, B1633, B1637 and B1638 may be output at this time, but they are not related to this check.



B
REPLACE AIRBAG SENSOR ASSEMBLY (Click here)

C
REPLACE NO. 2 SIDE AIRBAG SENSOR ASSEMBLY LH (Click here)
A

USE SIMULATION METHOD TO CHECK (Click here)  

21.CHECK SIDE AIRBAG SENSOR ASSEMBLY LH


    C166120E08

  1. Turn the power switch off.

  1. Disconnect the cable from the negative (-) auxiliary battery terminal.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

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

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

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Clear the DTCs stored in memory (Click here).

  1. Turn the power switch off.

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Check for DTCs (Click here).

    Result:
    Result
    		Proceed to
    DTCs B1622 and B1627 are not output.
    		A
    DTC B1627 is output.
    		B
    DTC B1622 is output.
    		C

    Text in Illustration 
    *1
    		Side Airbag Sensor Assembly RH
    *2
    		Airbag Sensor Assembly

    HINT:
    Codes other than DTCs B1622 and B1627 may be output at this time, but they are not related to this check.



B
REPLACE AIRBAG SENSOR ASSEMBLY (Click here)

C
REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH (Click here)
A

USE SIMULATION METHOD TO CHECK (Click here)