RM38N0EC _58 Vehicle Interior _111833 LIGHTING (INT) _0499871 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

·

No. 1 Room Light Assembly


WIRING DIAGRAM

E444882E05
0.781,0.76 1.75,1.125 0.969,0.365 10 false from INP STD NO. 1 - 2 Fuse 2.719,0.76 3.031,0.958 0.313,0.198 10 false 4F 2.75,0.552 2.906,0.75 0.156,0.198 10 false 1 2.708,1.708 3.021,1.906 0.313,0.198 10 false 4C 2.75,1.51 3.063,1.708 0.313,0.198 10 false 4 4.219,1.385 5.448,1.583 1.229,0.198 10 false DOME CUT 5.635,0.563 5.948,0.76 0.313,0.198 10 false 17 5.667,3.281 5.823,3.479 0.156,0.198 10 false 5 6.031,3.375 6.49,3.573 0.458,0.198 10 false ILE 6.01,0.635 6.625,0.833 0.615,0.198 10 false DOMR 3.031,2.531 5.75,2.792 2.719,0.26 10 false Power Distribution Box Assembly 4.271,3.385 4.885,3.583 0.615,0.198 10 false DOOR 4.396,4.583 4.854,4.781 0.458,0.198 10 false GND 4.771,4.583 5.083,4.781 0.313,0.198 10 false 18 4.771,3.385 5.031,3.583 0.26,0.198 10 false 14 3.469,3.625 4.698,3.823 1.229,0.198 10 false Door Linked Switch 3.469,4.198 4.208,4.573 0.74,0.375 10 false Dome Light Switch 3.469,5.208 4.083,5.406 0.615,0.198 10 false RLMP 3.469,5.448 3.781,5.667 0.313,0.219 10 false 17 2.896,4.979 3.354,5.177 0.458,0.198 10 false OFF 2.906,3.396 3.365,3.594 0.458,0.198 10 false OFF 2.896,3.99 3.208,4.188 0.313,0.198 10 false ON 2.875,4.583 3.188,4.781 0.313,0.198 10 false ON 1.531,3.979 2.76,4.177 1.229,0.198 10 false Map Light LH 1.531,5.063 2.76,5.26 1.229,0.198 10 false Map Light RH 0.99,3.708 1.448,3.906 0.458,0.198 10 false +B1 0.802,3.698 1.115,3.896 0.313,0.198 10 false 1 0.938,5.448 1.25,5.646 0.313,0.198 10 false Q9 0.948,5.615 2.469,5.833 1.521,0.219 10 false Map Light Assembly 2.188,6.354 2.802,6.552 0.615,0.198 10 false DOOR 2.719,6.354 3.177,6.552 0.458,0.198 10 false CTY 3.063,6.688 3.219,6.885 0.156,0.198 10 false 3 3.073,6.354 3.229,6.552 0.156,0.198 10 false 1 2.875,6.677 3.031,6.875 0.156,0.198 10 false E 2.177,6.688 2.49,6.885 0.313,0.198 10 false ON 0.729,6.531 0.885,6.729 0.156,0.198 10 false B 0.531,6.521 0.688,6.719 0.156,0.198 10 false 5 0.667,7.188 0.979,7.385 0.313,0.198 10 false Q10 0.667,7.344 4.49,7.542 3.823,0.198 10 false No. 1 Room Light Assembly 5.625,0.76 5.938,0.958 0.313,0.198 10 false MB 5.469,6.052 7.125,6.469 1.656,0.417 10 false Main Body ECU (Multiplex Network Body ECU) 3.646,1.865 4.875,2.063 1.229,0.198 10 false DOME CUT 5.594,3.49 5.906,3.688 0.313,0.198 10 false E37

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.



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* OFF or ON Perform the Active Test with the door linked switch of the map light assembly on and switch of the No. 1 room light assembly in the off (DOOR) position.

*: Refer to Operation Check 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 assembly does not come on) B
NG (No. 1 room light assembly does not come on) C
NG (All lights that are controlled by the illuminated entry system do not come on) D




A

USE SIMULATION METHOD TO CHECK

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


B

2.INSPECT MAP LIGHT ASSEMBLY

C

4.INSPECT NO. 1 ROOM LIGHT ASSEMBLY

D

6.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 4C 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

Click Location & Routing(Q9)Location & Routing

Click Connector(Q9)Body>Roof Wire>Map Light Assembly

Q9-1 (+B1) - 4C-4 Always Below 1 Ω



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 ASSEMBLY

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 ASSEMBLY

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


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

Disconnect the Q9 map light assembly connector.


b.

Disconnect the Q10 No. 1 room light assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(Q9,Q10)Location & Routing

Click Connector(Q9)Body>Roof Wire>Map Light Assembly

Click Connector(Q10)Body>Roof Wire>No. 1 Room Light Assembly

Q9-1 (+B1) - Q10-5 (B) Always Below 1 Ω
Q9-17 (RLMP) - Q10-1 (CTY) Always Below 1 Ω



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

6.INSPECT MAP LIGHT ASSEMBLY

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

Result:
Proceed to
OK
NG



OK

7.CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY)

NG

REPLACE MAP LIGHT ASSEMBLY

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


7.CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY)
a.

Disconnect the E37 main body ECU (multiplex network body ECU) connector.


b.

Disconnect the 4C power distribution box assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(Q9,E37)Location & Routing

Click Connector(Q9)Body>Roof Wire>Map Light Assembly

Click Connector(E37)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Multiplex Network Body ECU

Q9-1(+B1) - 4C-4 Always Below 1 Ω
Q9-14 (DOOR) - E37-5 (ILE) Always Below 1 Ω
Q9-1 (+B1) or 4C-4 - Body ground Always 10 kΩ or higher
Q9-14 (DOOR) or E37-5 (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