Dtc B1653/35 Seat Position Airbag Sensor Circuit Malfunction

Restraints. Camry. Acv40 Gsv40
Supplemental Restraint System. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC

CHECK CONNECTION OF CONNECTORS

CHECK CONNECTORS

CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (OPEN)

CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (SHORT)

CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (SHORT TO B+)

CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (SHORT TO GROUND)

CHECK SEAT POSITION AIRBAG SENSOR

REPLACE SEAT POSITION AIRBAG SENSOR

CHECK CENTER AIRBAG SENSOR ASSEMBLY

CHECK WIRE HARNESS (OPEN)

CHECK WIRE HARNESS (SHORT)

CHECK WIRE HARNESS (SHORT TO B+)

CHECK WIRE HARNESS (SHORT TO GROUND)

DTC B1653/35 Seat Position Airbag Sensor Circuit Malfunction


DESCRIPTION

The seat position airbag sensor circuit consists of the center airbag sensor assembly and the seat position airbag sensor.
DTC B1653/35 is recorded when a malfunction is detected in the seat position airbag sensor circuit.

DTC No.
DTC Detecting Condition
Trouble Area
B1653/35
  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 seat position airbag sensor circuit for 2 seconds.
  2. Seat position airbag sensor malfunction
  3. Center airbag sensor assembly malfunction
  1. Floor wire (for LHD)
  2. Floor wire No. 2 (for RHD)
  3. Front seat inner belt assembly LH
  4. Seat position airbag sensor
  5. Center airbag sensor assembly

WIRING DIAGRAM


Camry. Acv40 Gsv40.Supplemental Restraint System.Airbag System. Dtc B1653/35 Seat Position Airbag Sensor Circuit Malfunction


INSPECTION PROCEDURE

1.CHECK DTC


    Camry. Acv40 Gsv40.Supplemental Restraint System.Airbag System. Dtc B1653/35 Seat Position Airbag Sensor Circuit Malfunction

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

  1. Clear the DTCs stored in the memory (CAMRY_ACV40 RM000000XFE014X.html).

  1. Turn the ignition switch to the LOCK position.

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

  1. Check for DTCs (CAMRY_ACV40 RM000000XFE014X.html).

    OK:
    DTC B1653/35 is not output.
    HINT:
    Codes other than DTC B1653/35 may be output at this time, but they are not related to this check.


OK
USE SIMULATION METHOD TO CHECK (CAMRY_ACV40 RM000000XFD015X.html)
NG


2.CHECK CONNECTION OF CONNECTORS

  1. Turn the ignition switch to the LOCK position.

  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 seat position airbag sensor.

    OK:
    The connectors are properly connected.


NG
CONNECT CONNECTORS, THEN GO TO STEP 1
OK


3.CHECK CONNECTORS

  1. Disconnect the connectors from the center airbag sensor assembly and the seat position airbag sensor.

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

    OK:
    The connectors are not deformed or damaged.
    Result:
    Result
    		Proceed to
    OK
    		A
    NG (for LHD)
    		B
    NG (for RHD)
    		C


B
REPAIR OR REPLACE FLOOR WIRE

C
REPAIR OR REPLACE FLOOR WIRE NO. 2
A


4.CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (OPEN)


    Camry. Acv40 Gsv40.Supplemental Restraint System.Airbag System. Dtc B1653/35 Seat Position Airbag Sensor Circuit Malfunction

  1. Using a service wire, connect terminals 14 (DSP+) and 13 (DSP-) of connector B.

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

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified condition
    1 - 2
    		Always
    		Below 1 Ω


NG
Go to step 11
OK


5.CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (SHORT)


    Camry. Acv40 Gsv40.Supplemental Restraint System.Airbag System. Dtc B1653/35 Seat Position Airbag Sensor Circuit Malfunction

  1. Disconnect the service wire from connector B.

  1. Measure the resistance between the terminals of connector E according to the value(s) in the table below.

    Standard resistance:
    Tester connection
    		Condition
    		Specified condition
    1 - 2
    		Always
    		1 MΩ or higher


NG
Go to step 12
OK


6.CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (SHORT TO B+)


    Camry. Acv40 Gsv40.Supplemental Restraint System.Airbag System. Dtc B1653/35 Seat Position Airbag Sensor Circuit Malfunction

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

  1. Turn the ignition switch to the ON position.

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

    Standard voltage:
    Tester connection
    		Condition
    		Specified condition
    1 - Body ground
    		Ignition switch ON
    		Below 1 V
    2 - Body ground
    		Ignition switch ON
    		Below 1 V


NG
Go to step 13
OK


7.CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (SHORT TO GROUND)


    Camry. Acv40 Gsv40.Supplemental Restraint System.Airbag System. Dtc B1653/35 Seat Position Airbag Sensor Circuit Malfunction

  1. Turn the ignition switch to the LOCK position.

  1. Disconnect the negative (-) terminal cable from the battery, 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
    1 - Body ground
    		Always
    		1 MΩ or higher
    2 - Body ground
    		Always
    		1 MΩ or higher


NG
Go to step 14
OK


8.CHECK SEAT POSITION AIRBAG SENSOR


    Camry. Acv40 Gsv40.Supplemental Restraint System.Airbag System. Dtc B1653/35 Seat Position Airbag Sensor Circuit Malfunction

  1. Connect the connectors to the center airbag sensor assembly and the seat position airbag sensor.

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

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

  1. Clear the DTCs stored in the memory (CAMRY_ACV40 RM000000XFE014X.html).

  1. Turn the ignition switch to the LOCK position.

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

  1. Check for DTCs (CAMRY_ACV40 RM000000XFE014X.html).

    OK:
    DTC B1653/35 is not output.
    HINT:
    Codes other than DTC B1653/35 may be output at this time, but they are not related to this check.


OK
USE SIMULATION METHOD TO CHECK (CAMRY_ACV40 RM000000XFD015X.html)
NG


9.REPLACE SEAT POSITION AIRBAG SENSOR

  1. Turn the ignition switch to the LOCK position.

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

  1. Replace the seat position airbag sensor (CAMRY_ACV40 RM000000UWJ00NX.html).

    HINT:
    Perform inspection using parts from a normal vehicle if possible.

NEXT


10.CHECK CENTER AIRBAG SENSOR ASSEMBLY


    Camry. Acv40 Gsv40.Supplemental Restraint System.Airbag System. Dtc B1653/35 Seat Position Airbag Sensor Circuit Malfunction

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

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

  1. Clear the DTCs stored in the memory (CAMRY_ACV40 RM000000XFE014X.html).

  1. Turn the ignition switch to the LOCK position.

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

  1. Check for DTCs (CAMRY_ACV40 RM000000XFE014X.html).

    OK:
    DTC B1653/35 is not output.
    HINT:
    Codes other than DTC B1653/35 may be output at this time, but they are not related to this check.


NG
REPLACE CENTER AIRBAG SENSOR ASSEMBLY (CAMRY_ACV40 RM000000UWV00NX.html)
OK

END

11.CHECK WIRE HARNESS (OPEN)


    Camry. Acv40 Gsv40.Supplemental Restraint System.Airbag System. Dtc B1653/35 Seat Position Airbag Sensor Circuit Malfunction

  1. for LHD:
    Disconnect the floor wire connector from the front seat inner belt assembly (driver side).

    HINT:
    The service wire has already been inserted into connector B.

  1. for RHD:
    Disconnect the floor wire No. 2 connector from the front seat inner belt assembly (driver side).

    HINT:
    The service wire has already been inserted into connector B.

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

    Standard resistance:
    for LHD:
    Tester connection
    		Condition
    		Specified condition
    N3-2 (LSP+) - N3-4 (LSP-)
    		Always
    		Below 1 Ω
    for RHD:
    Tester connection
    		Condition
    		Specified condition
    O24-2 (RSP+) - O24-4 (RSP-)
    		Always
    		Below 1 Ω
    Result:
    Result
    		Proceed to
    OK
    		A
    NG (for LHD)
    		B
    NG (for RHD)
    		C


B
REPAIR OR REPLACE FLOOR WIRE

C
REPAIR OR REPLACE FLOOR WIRE NO. 2
A

REPLACE FRONT SEAT INNER BELT ASSEMBLY (DRIVER SIDE)

12.CHECK WIRE HARNESS (SHORT)


    Camry. Acv40 Gsv40.Supplemental Restraint System.Airbag System. Dtc B1653/35 Seat Position Airbag Sensor Circuit Malfunction

  1. for LHD:
    Disconnect the floor wire connector from the front seat inner belt assembly (driver side).

  1. for RHD:
    Disconnect the floor wire No. 2 connector from the front seat inner belt assembly (driver side).

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


Standard resistance:
for LHD:
Tester connection
Condition
Specified condition
N3-2 (LSP+) - N3-4 (LSP-)
Always
1 MΩ or higher
for RHD:
Tester connection
Condition
Specified condition
O24-2 (RSP+) - O24-4 (RSP-)
Always
1 MΩ or higher
Result:
Result
Proceed to
OK
A
NG (for LHD)
B
NG (for RHD)
C


B
REPAIR OR REPLACE FLOOR WIRE

C
REPAIR OR REPLACE FLOOR WIRE NO. 2
A

REPLACE FRONT SEAT INNER BELT ASSEMBLY (DRIVER SIDE)

13.CHECK WIRE HARNESS (SHORT TO B+)


    Camry. Acv40 Gsv40.Supplemental Restraint System.Airbag System. Dtc B1653/35 Seat Position Airbag Sensor Circuit Malfunction

  1. Turn the ignition switch off.

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

  1. for LHD:
    Disconnect the floor wire connector from the front seat inner belt assembly (driver side).

  1. for RHD:
    Disconnect the floor wire No. 2 connector from the front seat inner belt assembly (driver side).

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

  1. Turn the ignition switch on (IG).

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


Standard voltage:
for LHD:
Tester connection
Condition
Specified condition
N3-2 (LSP+) - Body ground
Ignition switch ON
Below 1 V
N3-4 (LSP-) - Body ground
Ignition switch ON
Below 1 V
for RHD:
Tester connection
Condition
Specified condition
O24-2 (RSP+) - Body ground
Ignition switch ON
Below 1 V
O24-4 (RSP-) - Body ground
Ignition switch ON
Below 1 V
Result:
Result
Proceed to
OK
A
NG (for LHD)
B
NG (for RHD)
C


B
REPAIR OR REPLACE FLOOR WIRE

C
REPAIR OR REPLACE FLOOR WIRE NO. 2
A

REPLACE FRONT SEAT INNER BELT ASSEMBLY (DRIVER SIDE)

14.CHECK WIRE HARNESS (SHORT TO GROUND)


    Camry. Acv40 Gsv40.Supplemental Restraint System.Airbag System. Dtc B1653/35 Seat Position Airbag Sensor Circuit Malfunction

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


Standard resistance:
for LHD:
Tester connection
Condition
Specified condition
N3-2 (LSP+) - Body ground
Always
1 MΩ or higher
N3-4 (LSP-) - Body ground
Always
1 MΩ or higher
for RHD:
Tester connection
Condition
Specified condition
O24-2 (RSP+) - Body ground
Always
1 MΩ or higher
O24-4 (RSP-) - Body ground
Always
1 MΩ or higher
Result:
Result
Proceed to
OK
A
NG (for LHD)
B
NG (for RHD)
C


B
REPAIR OR REPLACE FLOOR WIRE

C
REPAIR OR REPLACE FLOOR WIRE NO. 2
A

REPLACE FRONT SEAT INNER BELT ASSEMBLY (DRIVER SIDE)