RM38T0EC _58 Vehicle Interior _112288 LIGHTING (INT) _0510959 LIGHTING SYSTEM J

LIGHTING (INT)  LIGHTING SYSTEM  Interior Light Circuit  


DESCRIPTION

The main body ECU (multiplex network body ECU) controls the operation of the following lights:

·

Map Light Assembly

·

Room Light Assembly


WIRING DIAGRAM

E479607E01
0.719,0.469 1.802,1.229 1.083,0.76 10 false from ALT Fuse 3.469,0.49 3.781,0.688 0.313,0.198 10 false 8H 3.5,0.281 3.813,0.479 0.313,0.198 10 false 1 3.469,1.677 3.781,1.875 0.313,0.198 10 false 8C 3.5,1.469 3.813,1.667 0.313,0.198 10 false 4 2.354,0.656 3.521,0.917 1.167,0.26 10 false INP STD NO. 2 4.458,1.958 5.688,2.156 1.229,0.198 10 false DOME CUT 5.854,0.281 6.167,0.479 0.313,0.198 10 false 17 5.896,3 6.052,3.198 0.156,0.198 10 false 5 6.188,3.167 6.646,3.365 0.458,0.198 10 false ILE 6.177,0.479 6.792,0.677 0.615,0.198 10 false DOMR 3.885,2.365 6.906,2.625 3.021,0.26 10 false Power Distribution Box Assembly 4.771,3.083 5.385,3.281 0.615,0.198 10 false DOOR 4.865,4.521 5.323,4.719 0.458,0.198 10 false GND 5.271,4.5 5.583,4.698 0.313,0.198 10 false 14 5.281,3.063 5.438,3.26 0.156,0.198 10 false 4 3.729,3.375 4.5,3.792 0.771,0.417 10 false Door Linked Switch 4.677,5.302 5.292,5.5 0.615,0.198 10 false RLMP 4.698,5.563 4.917,5.76 0.219,0.198 10 false 3 3.063,5.198 3.521,5.396 0.458,0.198 10 false OFF 3.073,3.083 3.531,3.281 0.458,0.198 10 false OFF 3.063,3.906 3.375,4.104 0.313,0.198 10 false ON 3.052,4.49 3.365,4.688 0.313,0.198 10 false ON 1.615,3.74 2.844,3.938 1.229,0.198 10 false Map Light LH 1.594,5.042 2.823,5.24 1.229,0.198 10 false Map Light RH 1.167,3.354 1.625,3.552 0.458,0.198 10 false +B1 0.969,3.354 1.281,3.552 0.313,0.198 10 false 6 1.198,5.542 1.51,5.74 0.313,0.198 10 false T6 1.198,5.708 2.823,5.99 1.625,0.281 10 false Map Light Assembly 2.365,6.292 2.979,6.49 0.615,0.198 10 false DOOR 3.167,6.344 3.625,6.542 0.458,0.198 10 false CTY 3.521,6.344 3.677,6.542 0.156,0.198 10 false 1 1.271,6.542 1.427,6.74 0.156,0.198 10 false 5 3.302,6.729 3.458,6.927 0.156,0.198 10 false E 2.458,7.042 2.771,7.24 0.313,0.198 10 false ON 1.448,6.531 1.604,6.729 0.156,0.198 10 false B 3.521,6.719 3.677,6.917 0.156,0.198 10 false 3 1.406,7.354 1.719,7.552 0.313,0.198 10 false T28 1.417,7.531 5.24,7.729 3.823,0.198 10 false No.1 Room Light Assembly 5.844,0.479 6.156,0.677 0.313,0.198 10 false MB 5.656,6.406 7.083,7.156 1.427,0.75 10 false Main Body ECU (Multiplex Network Body ECU) 5.854,3.188 6.104,3.458 0.25,0.271 10 false I85 4.615,0.563 5.844,0.76 1.229,0.198 10 false IC

CAUTION / NOTICE / HINT

NOTICE:
·

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

·

Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.*1

*1: w/ Smart Entry and Start System




HINT:

The DOME CUT relay supplies power to the interior lights. If all the lights that use power from the DOME CUT relay do not turn on, check the interior light auto cut circuit first.

Click hereVehicle Interior>LIGHTING (INT)>LIGHTING SYSTEM>Interior Light Auto Cut Circuit


PROCEDURE

1.PERFORM ACTIVE TEST USING GTS
a.

Perform the Active Test according to the display on the GTS.

Body Electrical > Main Body > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Illuminated Entry System Turns on the lights that are controlled by the illuminated entry system*1 OFF or ON Perform the Active Test with DOOR switch in the map light assembly and room light assembly turned on.

*1: Refer to System Description for the lights that are controlled by the illuminated entry system.

Click hereVehicle Interior>LIGHTING (INT)>LIGHTING SYSTEM>OPERATION CHECK


Body Electrical > Main Body > Active Test
Tester Display
Illuminated Entry System
50004 449 20
OK:

All lights that are controlled by the illuminated entry system come on.



Result:
Result Proceed to
OK A
NG (Map light does not come on) B
NG (Room light does not come on) C
NG (Map light and room light does not come on) D



A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereVehicle Interior>LIGHTING (INT)>LIGHTING SYSTEM>PROBLEM SYMPTOMS TABLE


B

2.INSPECT MAP LIGHT ASSEMBLY

C

4.INSPECT NO. 1 ROOM LIGHT ASSMEBLY

D

7.INSPECT MAP LIGHT ASSEMBLY
2.INSPECT MAP LIGHT ASSEMBLY

Click hereVehicle Interior>LIGHTING (INT)>PERSONAL LIGHT>INSPECTION

Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - POWER DISTRIBUTION BOX ASSEMBLY)

NG

REPLACE MAP LIGHT ASSEMBLY

Click hereVehicle Interior>LIGHTING (INT)>PERSONAL LIGHT>REMOVAL


3.CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - POWER DISTRIBUTION BOX ASSEMBLY)
a.

Disconnect the 8C 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
T6-6 (+B1) - 8C-4 Always Below 1 Ω
T6-6 (+B1) or 8C-4 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

USE SIMULATION METHOD TO CHECK

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.INSPECT NO. 1 ROOM LIGHT ASSMEBLY

Click hereVehicle Interior>LIGHTING (INT)>ROOM LIGHT>INSPECTION

Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - NO. 1 ROOM LIGHT ASSEMBLY)

NG

REPLACE NO. 1 ROOM LIGHT ASSMEBLY

Click hereVehicle Interior>LIGHTING (INT)>ROOM LIGHT>REMOVAL


5.CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - NO. 1 ROOM LIGHT ASSEMBLY)
a.

Disconnect the T6 map light assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
T6-6 (+B1) - T28-5 (B) Always Below 1 Ω
T6-3 (RLMP) - T28-1 (CTY) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

6.INSPECT MAP LIGHT ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.INSPECT MAP LIGHT ASSEMBLY

Click hereVehicle Interior>LIGHTING (INT)>PERSONAL LIGHT>INSPECTION

Result:
Proceed to
OK
NG



OK

8.CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - POWER DISTRIBUTION BOX ASSEMBLY)

NG

REPLACE MAP LIGHT ASSEMBLY

Click hereVehicle Interior>LIGHTING (INT)>PERSONAL LIGHT>REMOVAL


8.CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - POWER DISTRIBUTION BOX ASSEMBLY)
a.

Disconnect the 8C power distribution box assembly connector.


b.

Disconnect the I85 main body ECU (multiplex network body ECU) connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
T6-6 (+B1) - 8C-4 Always Below 1 Ω
T6-4 (DOOR) - I85-5 (ILE) Always Below 1 Ω
T6-6 (+B1) - Body ground Always 10 kΩ or higher
8C-4 - Body ground Always 10 kΩ or higher
T6-4 (DOOR) - Body ground Always 10 kΩ or higher
I85-5 (ILE) - Body ground Always 10 kΩ or higher



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