SEAT BELT SEAT BELT WARNING SYSTEM Front Passenger Side Seat Belt Warning Light does not Operate
DESCRIPTION
When the ignition switch is ON, the power distribution box assembly detects the front passenger seat occupant status and the front seat inner belt assembly (front passenger seat) status and sends a signal to the main body ECU (multiplex network body ECU) via CXPI communication.
The main body ECU (multiplex network body ECU) sends the front passenger seat occupant status and front seat inner belt assembly (front passenger seat) status to the combination meter assembly via CAN communication.
Depending on the parking brake status, shift position, vehicle speed, front passenger seat occupant status and front seat inner belt assembly (front passenger seat) status, the combination meter assembly illuminates, flashes or turns off the seat belt warning light on the combination meter assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
- ·
The seat belt warning system uses the CAN communication system and CXPI communication system. First, confirm that there is no malfunction in the CAN communication system and CXPI communication system. Refer to the How to Proceed with Troubleshooting procedure.
·When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
- HINT:
- ·
The seat belt warning light on the combination meter assembly is used for both the driver seat and front passenger seat. Check that the operation of the seat belt warning light is normal first.
·If the seat belt warning light does not operate for both the driver seat and front passenger seat, replace the combination meter assembly.
·When replacing the combination meter assembly, update the ECU security key.
PROCEDURE
Read the Data List according to the display on the GTS.
- Body Electrical > Power Distribution Box > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note Passenger Seat Buckle Switch Status Front passenger seat belt buckle switch Set, Unset or Unknown Set: Front passenger seat belt buckle switch fastened
Unset: Front passenger seat belt buckle switch unfastened
Unknown: Data is not determined- Passenger Seat Occupant Sensor Status Front passenger occupant detection sensor OFF, ON or Unknown OFF: Front passenger seat not occupied
ON: Front passenger seat occupied
Unknown: Data is not determined-
- Body Electrical > Power Distribution Box > Data List
-
Tester Display Passenger Seat Buckle Switch Status Passenger Seat Occupant Sensor Status - 50003 475 1400,1401
- OK:
The GTS display changes correctly in response to the rear seat belt buckle switch condition.
- Result:
Result Proceed to The value of "Passenger Seat Buckle Switch Status" and "Passenger Seat Occupant Sensor Status" changes correctly. A The value of "Passenger Seat Buckle Switch Status" is "Unknown". B The value of "Passenger Seat Buckle Switch Status" does not change in accordance with the fastening and unfastening of the front passenger seatbelt. C The value of "Passenger Seat Occupant Sensor Status" is "Unknown". D The value of "Passenger Seat Occupant Sensor Status" does not change with the presence or absence of the weight of an occupant on the front passenger seat.
A
B
C
D
Perform the Active Test according to the display on the GTS.
- Body Electrical > Combination Meter > Active Test
-
Tester Display Measurement Item Control Range Diagnostic Note Driver Side Seat Belt Warning Front seat belt warning light ON or OFF -
- OK:
The GTS display changes correctly in response to the warning light condition.
- Result:
Proceed to OK NG
OK
NG
Disconnect the K54 front seat inner belt assembly (front passenger seat) connector.
Disconnect the 4E power distribution box assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Click Location & Routing(K54)Location & Routingewd_type=routing;type=c;code=K54
Click Connector(K54)Seat>Floor Wire>Front Seat Inner Belt Assembly RHewd_type=component;type=c;code=K54;pinno=3,2
K54-3 (+) - 4E-11 Always Below 1 Ω K54-2 (E) - Body ground Always Below 1 Ω K54-3 (+) or 4E-11 - Body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
for Power Seat: Click hereVehicle Interior>SEAT BELT>FRONT SEAT INNER BELT ASSEMBLY (for Power Seat)>INSPECTION202111,999999,_58,_111840,_0501512,RM100000001Z6H5,
for Manual Seat: Click hereVehicle Interior>SEAT BELT>FRONT SEAT INNER BELT ASSEMBLY (for Manual Seat)>INSPECTION202111,999999,_58,_111840,_0501511,RM100000001ZCUM,
- Result:
Proceed to OK NG
OK
NG
Disconnect the K54 front seat inner belt assembly (front passenger seat) connector.
Disconnect the 4E power distribution box assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Click Location & Routing(K54)Location & Routingewd_type=routing;type=c;code=K54
Click Connector(K54)Seat>Floor Wire>Front Seat Inner Belt Assembly RHewd_type=component;type=c;code=K54;pinno=5,4
K54-5(+) - 4E-29 Always Below 1 Ω K54-4 (E) - Body ground Always Below 1 Ω K54-5 (+) or 4E-29 - Body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
for Power Seat: Click hereVehicle Interior>SEAT BELT>FRONT SEAT INNER BELT ASSEMBLY (for Power Seat)>INSPECTION202111,999999,_58,_111840,_0501512,RM100000001Z6H5,
for Manual Seat: Click hereVehicle Interior>SEAT BELT>FRONT SEAT INNER BELT ASSEMBLY (for Manual Seat)>INSPECTION202111,999999,_58,_111840,_0501511,RM100000001ZCUM,
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to OK NG
OK
NG