RM38N0EC _58 Vehicle Interior _111833 LIGHTING (INT) _0499871 LIGHTING SYSTEM J

LIGHTING (INT)  LIGHTING SYSTEM  Interior Light Auto Cut Circuit  


DESCRIPTION

The main body ECU (multiplex network body ECU) controls operation of the DOME CUT relay in order to supply power to the interior lights. When the battery saving function operates while the interior lights are on, the main body ECU (multiplex network body ECU) opens the DOME CUT relay to turn off the lights.

WIRING DIAGRAM

E445189E05
0.542,0.719 1.5,1.073 0.958,0.354 10 false from INP STD NO. 1 - 2 Fuse 4.26,1.865 5.177,2.052 0.917,0.188 10 false DOME CUT 4.271,1.354 5.188,1.552 0.917,0.198 10 false DOME CUT 5.844,0.615 6.76,0.813 0.917,0.198 10 false DOMR 5.5,3.177 7.135,3.594 1.635,0.417 10 false Main Body ECU (Multiplex Network Body ECU) 2.875,2.667 5.76,2.854 2.885,0.188 10 false Power Distribution Box Assembly 0.438,2.01 1.844,2.219 1.406,0.208 10 false to each Interior Light 2.583,0.719 3.052,0.906 0.469,0.188 10 false 4F 2.604,0.531 3.073,0.719 0.469,0.188 10 false 1 2.573,2.115 3.042,2.302 0.469,0.188 10 false 20 2.573,2.313 3.042,2.5 0.469,0.188 10 false 4E 2.615,1.51 3.083,1.698 0.469,0.188 10 false 4 2.573,1.698 3.042,1.885 0.469,0.188 10 false 4C 5.604,0.604 6.073,0.792 0.469,0.188 10 false 17 5.5,3.01 5.813,3.208 0.313,0.198 10 false MB

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.



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
Relay for Interior Light Auto Cut Function DOME CUT relay OFF or ON When performing this Active Test, turn all the interior lights on.
·

OFF: DOME CUT relay on (interior lights turn on)

·

ON: DOME CUT relay off (interior lights turn off)


Body Electrical > Main Body > Active Test
Tester Display
Relay for Interior Light Auto Cut Function
50004 449 27
OK:

All of the interior lights turn off when ON is selected.



Result:
Proceed to
OK
NG



OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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


NG

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE - POWER DISTRIBUTION BOX ASSEMBLY)
2.CHECK HARNESS AND CONNECTOR (POWER SOURCE - POWER DISTRIBUTION BOX ASSEMBLY)
a.

Disconnect the 4F power distribution box assembly connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
4F-1 - Body ground Ignition switch off 11 to 14 V



Result:
Proceed to
OK
NG



OK

3.INSPECT POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.INSPECT POWER DISTRIBUTION BOX ASSEMBLY
E438209C04
1.469,0.51 1.844,0.75 0.375,0.24 4.979,0.51 5.354,0.75 0.375,0.24 1.375,2.219 1.75,2.458 0.375,0.24 4.948,2.521 5.323,2.76 0.375,0.24 5.76,3.406 5.479,3.073 true 0.219,0.167 0.531,0.323 0.313,0.156 10 false *a 1.573,0.563 2.021,0.896 0.448,0.333 10 false 4C 5.094,0.563 5.542,0.896 0.448,0.333 10 false 4E 5.042,2.573 5.49,2.906 0.448,0.333 10 false MB 1.5,2.271 1.948,2.604 0.448,0.333 10 false 4F 5.802,3.406 6.365,3.708 0.563,0.302 10 false DOMR
*a Component without harness connected
(Power Distribution Box Assembly) 		- -


a.

Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

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


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
4C-4 - Auxiliary battery negative (-) Auxiliary battery positive (+) → 4F-1
Auxiliary battery negative (-) → MB-17 (DOMR) 		11 to 14 V
4E-20 - Auxiliary battery negative (-) Auxiliary battery positive (+) → 4F-1
Auxiliary battery negative (-) → MB-17 (DOMR) 		11 to 14 V



c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
4F-1 - 4C-4 Always 10 kΩ or higher
4F-1 - 4E-20 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

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

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