LIGHTING (INT)  LIGHTING SYSTEM  Interior Light Circuit  


DESCRIPTION

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

·

Transponder Key Coil*

·

No. 1 Room Light Assembly

*: w/o Smart Entry and Start System



WIRING DIAGRAM

E369844E01
1.49,5.167 1.969,5.385 0.479,0.219 10 false E98 1.49,5.323 3.458,5.625 1.969,0.302 10 false Transponder Key Coil* 5.365,5.646 6.99,6.063 1.625,0.417 10 false Main Body ECU (Multiplex Network Body ECU) 1.542,4.76 2.021,4.979 0.479,0.219 10 false ILL+ 1.344,4.75 1.823,4.969 0.479,0.219 10 false 2 2.979,4.76 3.458,4.979 0.479,0.219 10 false 4 0.677,3.958 1.156,4.177 0.479,0.219 10 false O1 0.677,4.115 3.833,4.448 3.156,0.333 10 false No. 1 Roof Wire (No. 1 Room Light Assembly) 1.698,3.656 2.99,3.875 1.292,0.219 10 false Room Light Switch 2.156,3.365 2.635,3.583 0.479,0.219 10 false ON 2.219,3.156 2.698,3.375 0.479,0.219 10 false DOOR 2.177,2.969 2.656,3.188 0.479,0.219 10 false OFF 1.031,3.156 1.51,3.375 0.479,0.219 10 false B 0.708,4.75 1.188,4.969 0.479,0.219 10 false * 0.833,3.146 1.313,3.365 0.479,0.219 10 false 1 3.188,3.135 3.667,3.354 0.479,0.219 10 false 3 3.198,3.344 3.677,3.563 0.479,0.219 10 false 2 2.823,3.146 3.302,3.365 0.479,0.219 10 false CTY 2.979,3.344 3.458,3.563 0.479,0.219 10 false E 4.344,4 5.958,4.406 1.615,0.406 10 false Instrument Panel Junction Block Assembly 4.354,3.229 4.833,3.448 0.479,0.219 10 false 3C 5.75,3.229 6.229,3.448 0.479,0.219 10 false MB 0.594,6.198 3.01,6.542 2.417,0.344 10 false *: w/o Smart Entry and Start System 0.604,0.656 1.531,0.906 0.927,0.25 10 false from Battery 2.031,0.823 2.51,1.042 0.479,0.219 10 false DOME 3.052,0.667 3.531,0.885 0.479,0.219 10 false 3A 3.042,0.469 3.521,0.688 0.479,0.219 10 false 35 4.75,0.469 5.229,0.688 0.479,0.219 10 false 31 5.25,0.823 5.729,1.042 0.479,0.219 10 false 51 5.76,1.417 6.24,1.635 0.479,0.219 10 false 26 6.125,1.604 6.604,1.823 0.479,0.219 10 false DOMR 6.125,3.24 6.604,3.458 0.479,0.219 10 false ILE 4.354,3.042 4.833,3.26 0.479,0.219 10 false 54 4.344,2.177 4.823,2.396 0.479,0.219 10 false 12 3.74,1.167 4.219,1.385 0.479,0.219 10 false 5 3.708,0.573 4.188,0.792 0.479,0.219 10 false 2 4.385,0.573 4.865,0.792 0.479,0.219 10 false 1 4.406,1.177 4.885,1.396 0.479,0.219 10 false 3 3.802,1.552 4.708,1.771 0.906,0.219 10 false DOME CUT 5.802,3.052 6.281,3.271 0.479,0.219 10 false 1 4.354,2.365 4.833,2.583 0.479,0.219 10 false 3C 5.74,1.604 6.219,1.823 0.479,0.219 10 false MB 4.75,0.667 5.229,0.885 0.479,0.219 10 false 3C 5.448,1.052 5.927,1.271 0.479,0.219 10 false 3A 2.625,4.771 3.104,4.99 0.479,0.219 10 false ILL- 3.438,4.76 3.917,4.979 0.479,0.219 10 false *

CAUTION / NOTICE / HINT

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.CONFIRM MODEL
a.

Choose the model to be inspected.


Result:
Result Proceed to
w/o Smart Entry and Start System A
w/ Smart Entry and Start System B



A

2.PERFORM ACTIVE TEST USING GTS

B

9.PERFORM ACTIVE TEST USING GTS
2.PERFORM ACTIVE TEST USING GTS
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 / Active Test.


e.

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* ON or OFF -

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

Click hereVehicle Interior>LIGHTING (INT)>LIGHTING SYSTEM>SYSTEM DESCRIPTION


Body Electrical > Main Body > Active Test
Tester Display
Illuminated Entry System
50004 123 4
OK:

All lights that are controlled by the illuminated entry system illuminate.



Result:
Result Proceed to
OK A
NG (No. 1 room light does not illuminate) B
NG (Transponder key coil does not illuminate) C
NG (No. 1 room light and transponder key coil do not illuminate) D



A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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


B

3.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

C

5.CHECK HARNESS AND CONNECTOR (POWER SOURCE - TRANSPONDER KEY COIL)

D

8.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
3.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
a.

Disconnect the 3C instrument panel junction block assembly connector.


b.

Apply battery voltage to the connector and check that the No. 1 room light illuminates.

OK:
Measurement Condition Condition Specified Condition
Battery positive (+) → 3C-12
Battery negative (-) → 3C-54 		Room light switch in DOOR position No. 1 room light illuminates



Result:
Proceed to
OK
NG



OK

4.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (INCLUDING NO. 1 ROOM LIGHT ASSEMBLY COMPONENTS THAT ARE PART OF THE WIRE HARNESS)

4.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
E258624C04
1.115,0.271 1.458,0.5 0.344,0.229 4.677,0.396 5.021,0.625 0.344,0.229 2.813,1.396 3.073,1.031 false 0.177,0.135 0.49,0.333 0.313,0.198 10 *a 1.188,0.302 1.5,0.5 0.313,0.198 10 3C 4.75,0.417 5.063,0.615 0.313,0.198 10 MB 2.729,1.427 3.188,1.625 0.458,0.198 10 ILE
*a Component without harness connected
(Instrument Panel Junction Block Assembly) 		- -


a.

Remove the instrument panel junction block assembly.

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


b.

Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3C-54 - MB-1 (ILE) 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

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

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


5.CHECK HARNESS AND CONNECTOR (POWER SOURCE - TRANSPONDER KEY COIL)
a.

Disconnect the E98 transponder key coil connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
E98-2 (ILL+) - Body ground Battery saving function not operating 11 to 14 V



Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY COIL - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY COIL - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
a.

Disconnect the 3C instrument panel junction block assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3C-54 - E98-4 (ILL-) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

7.INSPECT TRANSPONDER KEY COIL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.INSPECT TRANSPONDER KEY COIL
a.

Remove the transponder key coil.

Click hereVehicle Interior>LIGHTING (INT)>IGNITION KEY CYLINDER LIGHT>REMOVAL


b.

Inspect the transponder key coil.

Click hereVehicle Interior>LIGHTING (INT)>IGNITION KEY CYLINDER LIGHT>INSPECTION


Result:
Proceed to
OK
NG



OK

4.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPLACE TRANSPONDER KEY COIL

Click hereVehicle Interior>LIGHTING (INT)>IGNITION KEY CYLINDER LIGHT>REMOVAL


8.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
a.

Disconnect the 3C instrument panel junction block assembly connector.


b.

Apply battery voltage to the connector and check that the No. 1 room light illuminates.

OK:
Measurement Condition Condition Specified Condition
Battery positive (+) → 3C-12
Battery negative (-) → 3C-54 		Room light switch in DOOR position No. 1 room light illuminates



Result:
Proceed to
OK
NG



OK

4.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (INCLUDING NO. 1 ROOM LIGHT ASSEMBLY COMPONENTS THAT ARE PART OF THE WIRE HARNESS)

9.PERFORM ACTIVE TEST USING GTS
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 / Active Test.


e.

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* ON or OFF -

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

Click hereVehicle Interior>LIGHTING (INT)>LIGHTING SYSTEM>SYSTEM DESCRIPTION


Body Electrical > Main Body > Active Test
Tester Display
Illuminated Entry System
50004 123 4
OK:

No. 1 room light illuminates.



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

10.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
10.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
a.

Disconnect the 3C instrument panel junction block assembly connector.


b.

Apply battery voltage to the connector and check that the No. 1 room light illuminates.

OK:
Measurement Condition Condition Specified Condition
Battery positive (+) → 3C-12
Battery negative (-) → 3C-54 		Room light switch in DOOR position No. 1 room light illuminates



Result:
Proceed to
OK
NG



OK

11.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (INCLUDING NO. 1 ROOM LIGHT ASSEMBLY COMPONENTS THAT ARE PART OF THE WIRE HARNESS)

11.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
E258624C04
1.115,0.271 1.458,0.5 0.344,0.229 4.677,0.396 5.021,0.625 0.344,0.229 2.813,1.396 3.073,1.031 false 0.177,0.135 0.49,0.333 0.313,0.198 10 *a 1.188,0.302 1.5,0.5 0.313,0.198 10 3C 4.75,0.417 5.063,0.615 0.313,0.198 10 MB 2.729,1.427 3.188,1.625 0.458,0.198 10 ILE
*a Component without harness connected
(Instrument Panel Junction Block Assembly) 		- -


a.

Remove the instrument panel junction block assembly.

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


b.

Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3C-54 - MB-1 (ILE) 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

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

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