Seat Belt Warning System (For Sedan) Front Passenger Side Seat Belt Warning Light Malfunction

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK SUPPLEMENTAL RESTRAINT SYSTEM

CHECK OCCUPANT CLASSIFICATION SYSTEM

READ VALUE USING TECHSTREAM (P BUCKLE SW)

CHECK FRONT SEAT INNER BELT ASSEMBLY RH

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

CHECK HARNESS AND CONNECTOR (CENTER AIRBAG SENSOR ASSEMBLY - OCCUPANT CLASSIFICATION ECU)

PERFORM ACTIVE TEST USING TECHSTREAM (P-BELT REMIND)

INSPECT FUSE (GAUGE)

INSPECT FRONT PASSENGER SEAT BELT WARNING LIGHT

CHECK HARNESS AND CONNECTOR (FUSE - FRONT PASSENGER SEAT BELT WARNING LIGHT)

CHECK HARNESS AND CONNECTOR (SEAT BELT WARNING LIGHT - COMBINATION METER ASSEMBLY)

DESCRIPTION

1. When the ignition switch is ON and the front passenger seat is occupied, the center airbag sensor assembly communicates the status of the front seat inner belt assembly RH to the main body ECU using the CAN communication line. The main body ECU receives signals from the center airbag sensor assembly and transmits them to the combination meter assembly. When the seat belt is unfastened, the combination meter assembly flashes the front passenger seat belt warning light on the hazard warning signal switch assembly. When the seat belt is fastened, the combination meter assembly stops flashing the front passenger seat belt warning light on the hazard warning signal switch assembly.
   

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Check for DTCs.
   

   Result:

   Result	Proceed to
   No DTCs are output	A
   DTCs are output	B

1. Check for DTCs.
   

   Result:

   Result	Proceed to
   No DTCs are output	A
   DTCs are output	B

1. Using the Techstream, read the Data List.
   
   

   Center Airbag Sensor Assembly:

   
   

   Item	Measurement Item / Display (Range)	Normal Condition	Diagnostic Note
   Passenger Buckle SW	Buckle switch (Front passenger side)/ UNSET: Front passenger side seat belt is unfastened SET: Front passenger side seat belt is fastened NG: Front passenger side seat belt is malfunctioning	UNSET/SET	-

   OK:

   Front seat inner belt assembly RH operates normally.
   

1. Disconnect the J11 front seat inner belt assembly RH connector.
   

2. Measure the resistance.
   

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   1 (RBE-) - 2 (RBE+)	Tongue plate fastened	10 kΩ or higher
   1 (RBE-) - 2 (RBE+)	Tongue plate unfastened	Below 1 Ω

3. Reconnect the front seat inner belt assembly RH connector.
   

1. Disconnect the J24 occupant classification ECU connector.
   

2. Disconnect the J11 front seat inner belt assembly RH connector.
   

3. Measure the resistance.
   

   Standard resistance:

   Tester Connection	Specified Condition
   J24-9 (BSW) - J11-2 (RBE+)	Below 1 Ω
   J24-9 (BSW) or J11-2 (RBE+) - Body ground	10 kΩ or higher
   J24-5 (BGND) - J11-1 (RBE-)	Below 1 Ω
   J24-5 (BGND) or J11-1 (RBE-) - Body ground	10 kΩ or higher

4. Reconnect the occupant classification ECU connector.
   

5. Reconnect the front seat inner belt assembly connector.
   

1. Disconnect the J9 center airbag sensor assembly connector.
   

2. Disconnect the J24 occupant classification ECU connector.
   

3. Measure the resistance.
   

   Standard resistance:

   Tester Connection	Specified Condition
   J9-12 (FSP+) - J24-8 (FSR+)	Below 1 Ω
   J9-12 (FSP+) or J24-8 (FSR+) - Body ground	10 kΩ or higher
   J9-13 (FSP-) - J24-4 (FSR-)	Below 1 Ω
   J9-13 (FSP-) or J24-4 (FSR-) - Body ground	10 kΩ or higher

4. Reconnect the center airbag sensor assembly connector.
   

5. Reconnect the occupant classification ECU connector.
   

1. Operate a Techstream according to the steps on the display and select "Active Test".
   
   

   Combination Meter Assembly:

   
   

   Item	Test Details	Diagnostic Note
   Front Passenger Side Seat Belt	Front passenger seat belt warning light / OFF or ON	-

OK:

Front passenger seat belt warning light comes on.

1. Remove the GAUGE fuse from the main body ECU.
   

2. Measure the resistance.
   

   Standard resistance:

   Below 1 Ω
   

3. Reinstall the GAUGE fuse.
   

1. Remove the hazard warning signal switch assembly.
   

2. Apply battery voltage to the terminals and check that the indicator illuminates.
   

   Standard:

   Tester Connection	Specified Condition
   Positive battery - Terminal 6 (IG+) Negative battery - Terminal 8 (PBEW)	Illuminates

3. Reinstall the hazard warning signal switch assembly.
   

1. Disconnect the D77 hazard warning signal switch assembly connector.
   

2. Disconnect the 4S main body ECU connector.
   

3. Measure the resistance.
   

   Standard resistance:

   Tester Connection	Specified Condition
   4S-15 - D77-6 (IG+)	Below 1 Ω
   4S-15 or D77-6 (IG+) - Body ground	10 kΩ or higher

4. Reconnect the hazard warning signal switch assembly connector.
   

5. Reconnect the main body ECU connector.
   

1. Disconnect the D76 combination meter assembly connector.
   

2. Disconnect the D77 hazard warning signal switch assembly connector.
   

3. Measure the resistance.
   

   Standard resistance:

   Tester Connection	Specified Condition
   D76-9 - D77-8 (PBEW)	Below 1 Ω
   D76-9 or D77-8 (PBEW) - Body ground	10 kΩ or higher

4. Reconnect the combination meter assembly connector.
   

5. Reconnect the hazard warning signal switch assembly connector.