RM38T0EC _58 Vehicle Interior _114202 SEAT BELT _0506146 SEAT BELT WARNING SYSTEM J

SEAT BELT  SEAT BELT WARNING SYSTEM  Front Passenger Side Seat Belt Warning Light does not Operate  


DESCRIPTION

The combination meter assembly blinks or turns off the passenger seat belt warning light on the combination meter assembly in accordance with the state of the front seat inner belt assembly RH and occupant detection sensor (separate Type front seat cushion pad RH).

WIRING DIAGRAM

E484208E01
0.49,1.354 1.688,2.146 1.198,0.792 10 false Combination Meter Assembly 3.115,1.385 4.781,2.135 1.667,0.75 10 false Main Body ECU (Multiplex Network Body ECU) 4.583,0.792 5.135,1.156 0.552,0.365 10 false CXPI 5.094,0.594 5.646,0.958 0.552,0.365 10 false 22 5.073,0.792 5.625,1.156 0.552,0.365 10 false MB 5.073,2.865 5.625,3.229 0.552,0.365 10 false 8F 5.083,4.521 5.635,4.885 0.552,0.365 10 false 8F 5.094,4.323 5.646,4.688 0.552,0.365 10 false 26 5.073,2.667 5.625,3.031 0.552,0.365 10 false 10 3.927,2.865 4.479,3.229 0.552,0.365 10 false O50 2.385,4.521 2.938,4.885 0.552,0.365 10 false A 2.385,3.979 2.938,4.344 0.552,0.365 10 false A 2.385,3.771 2.938,4.135 0.552,0.365 10 false 3 2.385,4.333 2.938,4.698 0.552,0.365 10 false 1 0.615,3.885 1.865,4.729 1.25,0.844 10 false Occupant Detection Sensor 0.469,4.99 2.146,5.854 1.677,0.865 10 false Separate Type Front Seat Cushion Pad RH 3.708,3.865 4.26,4.229 0.552,0.365 10 false E 3.708,3.302 4.26,3.667 0.552,0.365 10 false E 3.708,2.74 4.26,3.104 0.552,0.365 10 false + 3.708,4.417 4.26,4.781 0.552,0.365 10 false + 5.646,4.969 6.823,5.833 1.177,0.865 10 false Power Distribution Box Assembly 4.99,5.979 6.76,6.396 1.771,0.417 10 false : CAN Communication Line 4.99,6.354 6.896,6.698 1.906,0.344 10 false : CXPI Communication Line 4.021,2.667 4.573,3.031 0.552,0.365 10 false 3 4.031,4.313 4.583,4.677 0.552,0.365 10 false 5 4.031,3.208 4.583,3.573 0.552,0.365 10 false 2 4.031,3.771 4.583,4.135 0.552,0.365 10 false 4 6.469,2.615 7.021,2.979 0.552,0.365 10 false IC 3.927,3.406 4.479,3.771 0.552,0.365 10 false O50 3.927,3.979 4.479,4.344 0.552,0.365 10 false O50 3.927,4.521 4.479,4.885 0.552,0.365 10 false O50 2.646,4.979 3.99,5.906 1.344,0.927 10 false Front Seat Inner Belt Assembly RH

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.

Click hereVehicle Interior>SEAT BELT>SEAT BELT WARNING SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING

·

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.

·

Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.*


*: w/ Smart Entry and Start System



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.

Click hereVehicle Interior>SEAT BELT>SEAT BELT WARNING SYSTEM>ON-VEHICLE INSPECTION

·

If the seat belt warning light does not operate for both the driver seat and front passenger seat, replace the combination meter assembly.

Click hereVehicle Interior>METER / GAUGE / DISPLAY>COMBINATION METER>REMOVAL



PROCEDURE

1.READ VALUE USING GTS (PASSENGER SEAT BUCKLE SWITCH STATUS / PASSENGER SEAT OCCUPANT SENSOR STATUS)
a.

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 Passenger side seat belt buckle switch status Set, Unset, Unknown Set: Passenger seat belt fastened
Unset: Passenger seat belt not fastened
Unknown: Data is not determined 		-
Passenger Seat Occupant Sensor Status Passenger seat occupant detection sensor status OFF, ON, Unknown OFF: Passenger seat not occupied
ON: 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 front passenger seat belt and front passenger seat condition.



Result:
Result Proceed to
OK A
NG (Passenger Seat Buckle Switch Status) B
NG (Passenger Seat Occupant Sensor Status) C



A

2.PERFORM ACTIVE TEST USING GTS (DRIVER SIDE SEAT BELT WARNING)

B

3.INSPECT FRONT SEAT INNER BELT ASSEMBLY RH

C

5.INSPECT FRONT SEAT INNER BELT ASSEMBLY RH
2.PERFORM ACTIVE TEST USING GTS (DRIVER SIDE SEAT BELT WARNING)
a.

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 Driver side seat belt warning light OFF/ON -

Result:
Proceed to
OK
NG



OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


NG

REPLACE COMBINATION METER ASSEMBLY

Click hereVehicle Interior>METER / GAUGE / DISPLAY>COMBINATION METER>REMOVAL


3.INSPECT FRONT SEAT INNER BELT ASSEMBLY RH

Click hereVehicle Interior>SEAT BELT>FRONT SEAT INNER BELT ASSEMBLY>INSPECTION

Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT ASSEMBLY RH - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND)

NG

REPLACE FRONT SEAT INNER BELT ASSEMBLY RH

Click hereVehicle Interior>SEAT BELT>FRONT SEAT INNER BELT ASSEMBLY>REMOVAL


4.CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT ASSEMBLY RH - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND)
a.

Disconnect the 8F power distribution box assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
O50-3 (+) - 8F-10 Always Below 1 Ω
O50-3 (+) or 8F-10 - Body ground Always 10 kΩ or higher
O50-2 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.INSPECT FRONT SEAT INNER BELT ASSEMBLY RH

Click hereVehicle Interior>SEAT BELT>FRONT SEAT INNER BELT ASSEMBLY>INSPECTION

Result:
Proceed to
OK
NG



OK

6.INSPECT OCCUPANT DETECTION SENSOR (SEPARATE TYPE FRONT SEAT CUSHION PAD RH))

NG

REPLACE FRONT SEAT INNER BELT ASSEMBLY RH

Click hereVehicle Interior>SEAT BELT>FRONT SEAT INNER BELT ASSEMBLY>REMOVAL


6.INSPECT OCCUPANT DETECTION SENSOR (SEPARATE TYPE FRONT SEAT CUSHION PAD RH))

Click hereVehicle Interior>SEAT BELT>OCCUPANT DETECTION SENSOR>INSPECTION

Result:
Proceed to
OK
NG



OK

7.CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT ASSEMBLY RH - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND)

NG

REPLACE OCCUPANT DETECTION SENSOR (SEPARATE TYPE FRONT SEAT CUSHION PAD RH))

Click hereVehicle Interior>SEAT BELT>OCCUPANT DETECTION SENSOR>REMOVAL


7.CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT ASSEMBLY RH - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND)
a.

Disconnect the 8F power distribution box assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
O50-5 (+) - 8F-26 Always Below 1 Ω
O50-5 (+) or 8F-26 - Body ground Always 10 kΩ or higher
O50-4 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR