SEAT BELT SEAT BELT WARNING SYSTEM Rear Seat Belt Warning Light Malfunction
DESCRIPTION
The power distribution box assembly sends a signal indicating a rear seat belt status when the ignition switch is ON to the main body ECU (multiplex network body ECU) via CXPI communication.
The main body ECU (multiplex network body ECU) sends a signal indicating the rear door courtesy light switch status when the ignition switch is ON or off and a signal indicating a rear seat belt status when the ignition switch is ON to the combination meter assembly via CAN communication.
Depending on the rear door courtesy light switch signal, rear seat belt status, shift position and vehicle speed, the combination meter assembly illuminates or turns off the rear seat belt warning light.
WIRING DIAGRAM
for SFTM Made
for GTMC Made
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.
·Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.
·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.
·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 > Main Body > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note RR Door Courtesy Switch Status Rear door courtesy light switch (RH) signal Close or Open Close: Rear door RH closed
Open: Rear door RH open- RL Door Courtesy Switch Status Rear door courtesy light switch (LH) signal Close or Open Close: Rear door LH closed
Open: Rear door LH open-
- Body Electrical > Main Body > Data List
-
Tester Display RR Door Courtesy Switch Status RL Door Courtesy Switch Status - 50003 449 32,33
- OK:
The GTS display changes correctly in response to the rear door courtesy light switch condition.
- Result:
Proceed to OK NG
OK
NG
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 Rear Seat RH Buckle Switch Status Rear RH seat belt buckle switch Set, Unset or Unknown Set: Rear RH seat belt buckle switch fastened
Unset: Rear RH seat belt buckle switch unfastened
Unknown: Data is not determined- Rear Seat Center Buckle Switch Status Rear center seat belt buckle switch Set, Unset or Unknown Set: Rear center seat belt buckle switch fastened
Unset: Rear center seat belt buckle switch unfastened
Unknown: Data is not determined- Rear Seat LH Buckle Switch Status Rear LH seat belt buckle switch Set, Unset or Unknown Set: Rear LH seat belt buckle switch fastened
Unset: Rear LH seat belt buckle switch unfastened
Unknown: Data is not determined-
- Body Electrical > Power Distribution Box > Data List
-
Tester Display Rear Seat RH Buckle Switch Status Rear Seat Center Buckle Switch Status Rear Seat LH Buckle Switch Status - 50003 475 1402,1403,1404
- OK:
The GTS display changes correctly in response to the rear seat belt buckle switch condition.
- Result:
Result Proceed to OK A NG (Unknown displayed) B NG (Rear RH seat belt malfunction) C NG (Rear center seat belt malfunction) D NG (Rear LH seat belt malfunction) E
A
B
C
D
E
- Result:
Proceed to OK NG
OK
NG
Disconnect the 4E power distribution box assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for SFTM Made Tester Connection Condition Specified Condition Click Location & Routing(L34)Location & Routingewd_type=routing;type=c;code=L34
Click Connector(L34)Body>No. 2 Floor Wire>Rear Seat Inner Belt Assembly RHewd_type=component;type=c;code=L34;pinno=5,4
L34-5 - 4E-8 Always Below 1 Ω L34-5 or 4E-8 - Body ground Always 10 kΩ or higher L34-4 - Body ground Always Below 1 Ω
for GTMC Made Tester Connection Condition Specified Condition Click Location & Routing(L49)Location & Routingewd_type=routing;type=c;code=L49
L49-5 - 4E-8 Always Below 1 Ω L49-5 or 4E-8 - Body ground Always 10 kΩ or higher L49-4 - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to OK NG
OK
NG
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(L36)Location & Routingewd_type=routing;type=c;code=L36
Click Connector(L36)Body>No. 2 Floor Wire>Rear Seat Inner with Center Belt Assembly LHewd_type=component;type=c;code=L36;pinno=4,3
L36-4 - 4E-4 Always Below 1 Ω L36-3 - Body ground Always Below 1 Ω L36-4 or 4E-4 - Body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to OK NG
OK
NG
Disconnect the 4E power distribution box assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for SFTM Made Tester Connection Condition Specified Condition Click Location & Routing(L35)Location & Routingewd_type=routing;type=c;code=L35
Click Connector(L35)Body>No. 2 Floor Wire>Rear Seat Inner with Center Belt Assembly LHewd_type=component;type=c;code=L35;pinno=5,4
L35-5 - 4E-19 Always Below 1 Ω L35-4 - Body ground Always Below 1 Ω L35-5 or 4E-19 - Body ground Always 10 kΩ or higher
for GTMC Made Tester Connection Condition Specified Condition Click Location & Routing(L50)Location & Routingewd_type=routing;type=c;code=L50
L50-5 - 4E-19 Always Below 1 Ω L50-4 - Body ground Always Below 1 Ω L50-5 or 4E-19 - Body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG