Dtc B2063 Buckle Switch Malfunction

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM)

CHECK DTC OUTPUT (SUPPLEMENTAL RESTRAINT SYSTEM)

READ VALUE OF INTELLIGENT TESTER

CHECK HARNESS AND CONNECTOR (SEAT BELT CONTROL ECU - FRONT SEAT BELT ASSEMBLY)

CHECK HARNESS AND CONNECTOR (SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY)

CHECK HARNESS AND CONNECTOR (SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY)

CHECK HARNESS AND CONNECTOR (SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY)

CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)

REPLACE FRONT SEAT INNER BELT ASSEMBLY (PASSENGER SIDE)

CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)

DESCRIPTION

1. This circuit consists of the front seat inner belt assembly (driver side), front seat inner belt assembly passenger side), center airbag sensor assembly and seat belt control ECU.
   
2. When the driver side seat belt is fastened to the front seat inner belt assembly (driver side), the center airbag sensor assembly detects malfunctions in the circuit.
   
3. When the passenger side seat belt is fastened to the front seat inner belt assembly (passenger side), the seat belt control ECU detects malfunctions in the circuit.
   
4. The center airbag sensor assembly sends information about the seat belt fastened/unfastened condition and circuit malfunctions through CAN communication to the seat belt control ECU.
   
5. The seat belt control ECU uses information from the center airbag sensor assembly to control the pre-crash safety system.
   

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed (Click here).

1. Delete the DTC (Click here).
   

2. Check that DTC U0151 is not output.
   

   OK:

   DTC U0151 is not output.
   

1. Delete the DTC (Click here).
   

2. Check that DTC B1655 is not output.
   

   OK:

   DTC B1655 is not output.
   

1. Connect the intelligent tester to the DLC3.
   

2. Turn the engine switch on (IG) and the turn the intelligent tester main switch on.
   

3. Select P Bk SW in the Data List and read the value displayed on the intelligent tester.
   
   

   Item	Measurement Item/Range (Display)	Normal Condition	Diagnostic Note
   P Bk SW	Buckle switch status of passenger's seat/ UNSET: Passenger side seat belt is unfastened SET: Passenger side seat belt is fastened NG: Indeterminate date	UNSET / SET	-

   OK:

   SET (Passenger side seat belt is fastened) appears on the tester.
   

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

HINT:

Make sure that the engine switch is off before disconnecting the cable.

2. Disconnect the P4 (LHD) or O6 (RHD) belt and O38 ECU connectors.
   

3. Using a service wire, connect terminals PBK+ and PBK- of connector P4.
   

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   O38-14 (PBK+) - O38-12 (PBK-)	Always	Below 1 Ω

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   O38-14 (PBK+) - Body ground	Always	1kΩ or higher
   O38-12 (PBK-) - Body ground	Always	1kΩ or higher

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   O38-14 (PBK+) - O38-12 (PBK-)	Always	1 kΩ or higher

1. Connect the negative (-) battery terminal, and turn the engine switch on (IG).
   

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

   Standard voltage:

   Tester Connection	Condition	Specified Condition
   O38-14 (PBK+) - Body ground	Always	Below 1 V
   O38-12 (PBK-) - Body ground	Always	Below 1 V

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

2. Connect the connectors from the seat belt control ECU and front seat inner belt assembly (passenger side).
   

3. Connect the cable to the negative (-) battery terminal and turn the engine switch on (IG). Then wait 60 seconds.
   

4. Delete the DTC (Click here).
   

5. Recheck for DTC.
   

   OK:

   DTC B2063 is not output.
   

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

2. Replace the front seat inner belt assembly of passenger side (Click here).
   

1. Connect the negative (-) battery terminal and turn the engine switch on (IG). Then wait 60 seconds.
   

2. Delete the DTC (Click here).
   

3. Recheck for DTC.
   

   OK:

   DTC B2063 is not output.