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

LIGHTING (INT)  LIGHTING SYSTEM  Front Door Courtesy Switch Circuit  


DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of the front door courtesy light switch assembly.

WIRING DIAGRAM

E369877E17
0.781,1.083 4.271,1.333 3.49,0.25 10 false Front Door Courtesy Light Switch Assembly (for LH) 0.792,2.219 4.167,2.438 3.375,0.219 10 false Front Door Courtesy Light Switch Assembly (for RH) 0.792,2.052 1.073,2.25 0.281,0.198 10 false K3 0.792,0.927 1.427,1.156 0.635,0.229 10 false L5 2.896,0.563 3.177,0.76 0.281,0.198 10 false 1 2.896,1.729 3.177,1.927 0.281,0.198 10 false 1 6.031,0.583 6.542,0.792 0.51,0.208 10 false FLCY 6.031,1.698 6.542,1.906 0.51,0.208 10 false FRCY 5.854,1.698 6.115,1.917 0.26,0.219 10 false 4 5.854,0.583 6.115,0.802 0.26,0.219 10 false 2 5.458,3.146 7.094,3.625 1.635,0.479 10 false Main Body ECU (Multiplex Network Body ECU) 4.177,0.688 4.49,0.885 0.313,0.198 10 false 4E 4.188,1.823 4.5,2.021 0.313,0.198 10 false 4C 6.573,0.302 6.885,0.5 0.313,0.198 10 false +B 6.563,1.427 6.875,1.625 0.313,0.198 10 false +B 4.229,0.479 4.49,0.698 0.26,0.219 10 false 3 4.219,1.615 4.479,1.833 0.26,0.219 10 false 9 4.51,2.208 5.927,2.625 1.417,0.417 10 false Power Distribution Box Assembly 5.458,2.969 5.969,3.177 0.51,0.208 10 false MB

CAUTION / NOTICE / HINT

NOTICE:

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


PROCEDURE

1.READ VALUE USING GTS
a.

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
FR Door Courtesy Switch Status Front door courtesy light switch assembly (for RH) signal Close or Open Close: Front door RH closed
Open: Front door RH open 		-
FL Door Courtesy Switch Status Front door courtesy light switch assembly (for LH) signal Close or Open Close: Front door LH closed
Open: Front door LH open 		-
Body Electrical > Main Body > Data List
Tester Display
FR Door Courtesy Switch Status
FL Door Courtesy Switch Status
50003 449 30,31
OK:

Normal conditions listed above are displayed.



Result:
Result Proceed to
OK A
NG ("FL Door Courtesy Switch Status" is not normal) B
NG ("FR Door Courtesy Switch Status" is not normal) C



A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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


B

2.INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (for LH)

C

5.INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (for RH)
2.INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (for LH)

Click hereVehicle Interior>LIGHTING (INT)>FRONT DOOR COURTESY SWITCH>INSPECTION

Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (for LH) - POWER DISTRIBUTION BOX ASSEMBLY)

NG

REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (for LH)

Click hereVehicle Interior>LIGHTING (INT)>FRONT DOOR COURTESY SWITCH>REMOVAL


3.CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (for LH) - POWER DISTRIBUTION BOX ASSEMBLY)
a.

Disconnect the 4E 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(L5)Location & Routing

Click Connector(L5)Body>No. 2 Floor Wire>Front Door Courtesy Light Switch Assembly LH

L5-1 - 4E-3 Always Below 1 Ω
L5-1 or 4E-3 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

4.INSPECT POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.INSPECT POWER DISTRIBUTION BOX ASSEMBLY
E438203C22
1.552,0.177 1.927,0.406 0.375,0.229 5.302,0.25 5.677,0.479 0.375,0.229 4.167,0.896 4.031,1.313 true 0.26,0.104 0.5,0.302 0.24,0.198 10 false *a 3.885,1.333 4.323,1.51 0.438,0.177 10 false FLCY 1.656,0.229 1.99,0.396 0.333,0.167 10 false 4E 5.396,0.292 5.729,0.458 0.333,0.167 10 false MB
*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 resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
4E-3 - MB-2 (FLCY) 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 POWER DISTRIBUTION BOX ASSEMBLY

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


5.INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (for RH)

Click hereVehicle Interior>LIGHTING (INT)>FRONT DOOR COURTESY SWITCH>INSPECTION

Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (for RH) - POWER DISTRIBUTION BOX ASSEMBLY)

NG

REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (for RH)

Click hereVehicle Interior>LIGHTING (INT)>FRONT DOOR COURTESY SWITCH>REMOVAL


6.CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (for RH) - 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(K3)Location & Routing

Click Connector(K3)Body>Floor Wire>Front Door Courtesy Light Switch Assembly RH

K3-1 - 4C-9 Always Below 1 Ω
K3-1 or 4C-9 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

7.INSPECT POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.INSPECT POWER DISTRIBUTION BOX ASSEMBLY
E442698C03
1.552,0.177 1.927,0.406 0.375,0.229 5.188,0.271 5.563,0.5 0.375,0.229 4.385,0.917 4.25,1.333 true 0.26,0.104 0.5,0.302 0.24,0.198 10 false *a 4.094,1.354 4.531,1.531 0.438,0.177 10 false FRCY 1.656,0.229 1.99,0.396 0.333,0.167 10 false 4C 5.281,0.313 5.615,0.479 0.333,0.167 10 false MB
*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 resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
4C-9 - MB-4 (FRCY) 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 POWER DISTRIBUTION BOX ASSEMBLY

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