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)  Rear Seat Belt Warning Light Malfunction  


DESCRIPTION

The main body ECU (multiplex network body ECU) detects whether either the rear doors are open or closed based on the courtesy light switch condition and then sends the rear door status signal to the combination meter assembly. The combination meter assembly detects rear seat belt state. The rear seat belt warning light on the combination meter assembly illuminates, blinks or turns off in accordance with the rear door state, vehicle speed and rear seat belt state.

WIRING DIAGRAM

B517366
2.219,2.292 2.833,2.49 0.615,0.198 10 false RLSB 2.208,2.813 2.823,3.01 0.615,0.198 10 false RCSB 2.198,3.865 2.813,4.063 0.615,0.198 10 false RRSB 2.688,2.813 3.469,3.104 0.781,0.292 10 false 19 2.698,3.875 3.406,4.146 0.708,0.271 10 false 35 3.771,2.198 3.927,2.396 0.156,0.198 10 false 5 3.771,2.729 3.927,2.927 0.156,0.198 10 false 1 4.052,2.292 4.667,2.49 0.615,0.198 10 false LBR+ 4.052,2.813 4.667,3.01 0.615,0.198 10 false CBR+ 5.24,2.292 5.854,2.49 0.615,0.198 10 false LBR- 5.219,2.813 5.833,3.01 0.615,0.198 10 false CBR- 5.729,2.208 5.885,2.406 0.156,0.198 10 false 4 5.729,2.74 5.885,2.938 0.156,0.198 10 false 2 5.646,2.927 6.104,3.125 0.458,0.198 10 false O86 5.646,2.396 6.104,2.594 0.458,0.198 10 false O85 3.708,2.927 4.167,3.125 0.458,0.198 10 false O86 3.708,2.406 4.167,2.604 0.458,0.198 10 false O85 4.594,2.531 5.823,2.729 1.229,0.198 10 false (for LH) 4.479,3.073 6.01,3.271 1.531,0.198 10 false (for Center) 3.427,3.406 6.469,3.958 3.042,0.552 10 false Rear Seat Inner with Center Belt Assembly LH 3.844,3.875 4,4.073 0.156,0.198 10 false 5 4.052,3.906 4.667,4.104 0.615,0.198 10 false RBR+ 5.208,3.896 5.823,4.094 0.615,0.198 10 false RBR- 3.615,4.25 4.073,4.448 0.458,0.198 10 false O84 3.635,4.417 6.677,4.969 3.042,0.552 10 false Rear Seat 3 Point Type Belt Assembly RH 0.896,4.479 1.333,4.76 0.438,0.281 10 false I5 0.885,4.656 4.865,4.854 3.979,0.198 10 false Combination Meter Assembly 1.427,5.635 2.042,5.833 0.615,0.198 10 false LCTY 1.417,6.594 2.031,6.792 0.615,0.198 10 false RCTY 1.875,5.542 2.188,5.74 0.313,0.198 10 false 13 1.885,6.5 2.042,6.698 0.156,0.198 10 false 2 2.208,5.469 2.521,5.667 0.313,0.198 10 false 24 2.208,6.604 2.521,6.802 0.313,0.198 10 false 4E 2.208,5.656 2.521,5.854 0.313,0.198 10 false 4A 2.219,6.427 2.531,6.625 0.313,0.198 10 false 31 3.833,6.5 3.99,6.698 0.156,0.198 10 false 1 3.854,5.542 4.094,6.24 0.24,0.698 10 false 1 3.396,5.906 3.854,6.104 0.458,0.198 10 false O31 3.396,6.052 6.552,6.531 3.156,0.479 10 false Rear Door Courtesy Light Switch Assembly (LH) 3.365,7.031 6.521,7.51 3.156,0.479 10 false Rear Door Courtesy Light Switch Assembly (RH) 3.365,6.875 3.823,7.073 0.458,0.198 10 false O34 1.896,7 2.979,8.052 1.083,1.052 10 false Driver Side Junction Block Assembly 0.146,7.365 1.802,8.396 1.656,1.031 10 false Main Body ECU (Multiplex Network Body ECU) 1.021,8.375 4.688,8.573 3.667,0.198 10 false : CAN Communication Line 1.458,0.958 1.948,1.135 0.49,0.177 10 false ECM 4.094,0.979 6.188,1.354 2.094,0.375 10 false Skid Control ECU (Brake Actuator Assembly) 2.698,2.271 3.521,2.604 0.823,0.333 10 false 36 5.688,3.875 5.844,4.073 0.156,0.198 10 false 4 0.146,7.177 0.76,7.375 0.615,0.198 10 false MB

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

·

Inspect the fuses for circuits related to this system before performing the following procedure.



PROCEDURE

1.READ VALUE USING GTS (RR DOOR COURTESY SW, RL DOOR COURTESY 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
RR Door Courtesy SW Rear door courtesy light switch RH ON or OFF ON: Rear door RH open
OFF: Rear door RH closed 		-
RL Door Courtesy SW Rear door courtesy light switch LH ON or OFF ON: Rear door LH open
OFF: Rear door LH closed 		-
Body Electrical > Main Body > Data List
Tester Display
RR Door Courtesy SW
RL Door Courtesy SW
50003 123 24,25
OK:

The GTS display changes correctly in response to the rear door condition.



Result:
Proceed to
OK
NG



OK

2.CHECK REAR SEAT BELT WARNING

NG

GO TO LIGHTING SYSTEM

Click hereVehicle Interior>LIGHTING (INT)>LIGHTING SYSTEM (for NR Series Engine)>Rear Door Courtesy Switch Circuit


2.CHECK REAR SEAT BELT WARNING
a.
B518815C02
1.896,1.708 1.896,1.375 false 2.323,1.708 2.323,1.375 false 2.781,1.719 2.781,1.385 false 0.146,0.188 0.458,0.344 0.313,0.156 10 false *1 1.823,1.698 2.135,1.854 0.313,0.156 10 false *a 2.26,1.719 2.573,1.875 0.313,0.156 10 false *b 2.708,1.719 3.021,1.875 0.313,0.156 10 false *c
*1 Rear Seat Belt Warning Light (Combination Meter Assembly)
*a LH
*b Center
*c RH


Check the rear seat belt warning function.

Click hereVehicle Interior>SEAT BELT>SEAT BELT WARNING SYSTEM (for NR Series Engine)>ON-VEHICLE INSPECTION


Result:
Result Proceed to
The rear seat belt warning lights operation is normal A
The rear seat belt warning lights (all seats) do not operate normally B
The rear seat belt warning light (RH) does not operate normally C
The rear seat belt warning light (center) does not operate normally D
The rear seat belt warning light (LH) does not operate normally E



A

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


B

REPLACE COMBINATION METER ASSEMBLY

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


C

3.READ VALUE USING GTS (REAR RIGHT SEAT BUCKLE / OCCUPANT DETECTION WARNING SWITCH)

D

5.READ VALUE USING GTS (REAR CENTER SEAT BUCKLE / OCCUPANT DETECTION WARNING SWITCH)

E

7.READ VALUE USING GTS (REAR LEFT SEAT BUCKLE / OCCUPANT DETECTION WARNING SWITCH)
3.READ VALUE USING GTS (REAR RIGHT SEAT BUCKLE / OCCUPANT DETECTION WARNING SWITCH)
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 / Combination Meter / Data List.


e.

Read the Data List according to the display on the GTS.

Body Electrical > Combination Meter > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Rear Right Seat Buckle / Occupant Detection Warning Switch Rear seat inner with center belt RH buckle signal ON or OFF OFF: Rear RH seat belt fastened
ON: Rear RH seat belt not fastened 		-
Body Electrical > Combination Meter > Data List
Tester Display
Rear Right Seat Buckle / Occupant Detection Warning Switch
50003 409 30

Result:
Result Proceed to
ON or OFF does not appear on the tester screen according to the rear seat belt condition A
ON or OFF appears on the tester screen according to the rear seat belt condition B



A

4.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - REAR SEAT 3 POINT TYPE BELT ASSEMBLY RH - BODY GROUND)

B

REPLACE COMBINATION METER ASSEMBLY

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


4.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - REAR SEAT 3 POINT TYPE BELT ASSEMBLY RH - BODY GROUND)
a.

Disconnect the I5 combination meter assembly connector.


b.

Disconnect the O84 rear seat 3 point type belt assembly RH connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
I5-35 (RRSB) - O84-5 (RBR+) Always Below 1 Ω
I5-35 (RRSB) or O84-5 (RBR+) - Body ground Always 10 kΩ or higher
O84-4 (RBR-) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE REAR SEAT 3 POINT TYPE BELT ASSEMBLY RH

Click hereVehicle Interior>SEAT BELT>REAR SEAT INNER BELT ASSEMBLY (for RH Side)>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.READ VALUE USING GTS (REAR CENTER SEAT BUCKLE / OCCUPANT DETECTION WARNING SWITCH)
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 / Combination Meter / Data List.


e.

Read the Data List according to the display on the GTS.

Body Electrical > Combination Meter > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Rear Center Seat Buckle / Occupant Detection Warning Switch Rear seat inner with center belt LH (for center) buckle signal ON or OFF OFF: Rear LH seat belt (for center) fastened
ON: Rear LH seat belt (for center) not fastened 		-
Body Electrical > Combination Meter > Data List
Tester Display
Rear Center Seat Buckle / Occupant Detection Warning Switch
50003 409 32

Result:
Result Proceed to
ON or OFF does not appear on the tester screen according to the rear seat belt condition A
ON or OFF appears on the tester screen according to the rear seat belt condition B



A

6.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH (FOR CENTER) - BODY GROUND)

B

REPLACE COMBINATION METER ASSEMBLY

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


6.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH (FOR CENTER) - BODY GROUND)
a.

Disconnect the I5 combination meter assembly connector.


b.

Disconnect the O86 rear seat inner with center belt assembly LH (for center) connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
I5-19 (RCSB) - O86-1 (CBR+) Always Below 1 Ω
I5-19 (RCSB) or O86-1 (CBR+) - Body ground Always 10 kΩ or higher
O86-2 (CBR-) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH

Click hereVehicle Interior>SEAT BELT>REAR SEAT INNER BELT ASSEMBLY (for LH Side)>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.READ VALUE USING GTS (REAR LEFT SEAT BUCKLE / OCCUPANT DETECTION WARNING SWITCH)
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 / Combination Meter / Data List.


e.

Read the Data List according to the display on the GTS.

Body Electrical > Combination Meter > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Rear Left Seat Buckle / Occupant Detection Warning Switch Rear seat inner with center belt LH (for LH) buckle signal ON or OFF OFF: Rear LH seat belt (for LH) fastened
ON: Rear LH seat belt (for LH) not fastened 		-
Body Electrical > Combination Meter > Data List
Tester Display
Rear Left Seat Buckle / Occupant Detection Warning Switch
50003 409 31

Result:
Result Proceed to
ON or OFF does not appear on the tester screen according to the rear seat belt condition A
ON or OFF appears on the tester screen according to the rear seat belt condition B



A

8.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH (FOR LH) - BODY GROUND)

B

REPLACE COMBINATION METER ASSEMBLY

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


8.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH (FOR LH) - BODY GROUND)
a.

Disconnect the I5 combination meter assembly connector.


b.

Disconnect the O85 rear seat inner with center belt assembly LH (for LH) connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
I5-36 (RLSB) - O85-5 (LBR+) Always Below 1 Ω
I5-36 (RLSB) or O85-5 (LBR+) - Body ground Always 10 kΩ or higher
O85-4 (LBR-) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH

Click hereVehicle Interior>SEAT BELT>REAR SEAT INNER BELT ASSEMBLY (for LH Side)>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR