RM3660EC _58 Vehicle Interior _080748 SEAT BELT _0600558 SEAT BELT WARNING SYSTEM(for NR Series Engine) J

SEAT BELT  SEAT BELT WARNING SYSTEM(for NR Series Engine)  Driver Side Seat Belt Warning Light does not Operate  


DESCRIPTION

The combination meter assembly blinks or turns off the seat belt warning light on the combination meter assembly in accordance with the state of the front seat inner belt assembly LH.

WIRING DIAGRAM

B287218E84
4.167,0.823 4.438,1.063 0.271,0.24 10 false 4A 4.188,0.625 4.385,0.792 0.198,0.167 10 false 33 2.677,0.844 3.073,1.229 0.396,0.385 10 false DBKL 0.094,1.531 1.292,2.031 1.198,0.5 10 false Combination Meter Assembly 0.573,2.448 2.292,2.656 1.719,0.208 10 false : CAN Communication Line 3.125,0.708 3.323,0.938 0.198,0.229 10 false 18 5.26,0.719 5.458,0.99 0.198,0.271 10 false 3 6.094,0.719 6.333,1.063 0.24,0.344 10 false 2 1.708,1.688 3.354,2.063 1.646,0.375 10 false Main Body ECU (Multiplex Network Body ECU) 4.844,1.094 5.917,1.438 1.073,0.344 10 false O49 4.833,1.271 6.771,1.75 1.938,0.479 10 false Front Seat Inner Belt Assembly LH 3.5,1.25 4.583,1.792 1.083,0.542 10 false Driver Side Junction Block Assembly 1.708,1.531 1.979,1.771 0.271,0.24 10 false MB 5.427,0.729 5.583,0.927 0.156,0.198 10 false + 5.875,0.74 6.031,0.938 0.156,0.198 10 false E

CAUTION / NOTICE / HINT

NOTICE:
·

The seat belt warning system uses the CAN communication system. First, confirm that there is no malfunction in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure.

Click hereVehicle Interior>SEAT BELT>SEAT BELT WARNING SYSTEM (for NR Series Engine)>HOW TO PROCEED WITH TROUBLESHOOTING

·

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



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 (for NR Series Engine)>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 (D SEAT BUCKLE SW)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Main Body / Data List.


e.

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
D Seat Buckle SW Driver seat belt buckle switch ON or OFF ON: Driver seat belt fastened
OFF: Driver seat belt unfastened 		-
Body Electrical > Main Body > Data List
Tester Display
D Seat Buckle SW
50003 123 14
OK:

ON or OFF appears on the GTS screen according to the driver seat belt condition.



Result:
Proceed to
OK
NG



OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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


NG

2.INSPECT FRONT SEAT INNER BELT ASSEMBLY LH
3.INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY
a.

Remove the main body ECU (multiplex network body ECU).

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

B491251C03
1.948,0.719 2.365,0.958 0.417,0.24 5.552,0.625 5.948,0.865 0.396,0.24 2.417,2 2.417,1.573 false 5.667,0.656 5.979,0.854 0.313,0.198 10 false 4A 2.052,0.76 2.365,0.958 0.313,0.198 10 false MB 0.344,0.167 0.656,0.365 0.313,0.198 10 false *a 2.25,2 2.865,2.198 0.615,0.198 10 false DBKL
*a Component without harness connected
(Driver Side Junction Block Assembly) 		- -



b.

Disconnect the 4A driver side junction block assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
MB-18 (DBKL) - 4A-33 Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - FRONT SEAT INNER BELT ASSEMBLY LH - BODY GROUND)

NG

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

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


4.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - FRONT SEAT INNER BELT ASSEMBLY LH - BODY GROUND)
a.

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

Standard Resistance:
Tester Connection Condition Specified Condition
4A-33 - O49-3(+) Always Below 1 Ω
O49-3(+) or 4A-33 - Body ground Always 10 kΩ or higher
O49-2(E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR