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

LIGHTING (INT)  LIGHTING SYSTEM  Rear Door Courtesy Switch Circuit  


DESCRIPTION

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

WIRING DIAGRAM

E444728E02
0.74,0.958 1.24,1.26 0.5,0.302 10 false L6 0.74,1.115 4.094,1.344 3.354,0.229 10 false Rear Door Courtesy Light Switch Assembly (for LH) 0.771,2.073 1.271,2.375 0.5,0.302 10 false K4 0.771,2.229 4.083,2.5 3.313,0.271 10 false Rear Door Courtesy Light Switch Assembly (for RH) 2.896,0.573 3.396,0.875 0.5,0.302 10 false 1 4.302,0.583 4.802,0.885 0.5,0.302 10 false 26 4.385,1.719 4.885,2.021 0.5,0.302 10 false 1 4.521,2.198 5.021,2.5 0.5,0.302 10 false 4E 4.521,2.375 5.938,2.917 1.417,0.542 10 false Power Distribution Box Assembly 5.865,0.594 6.365,0.896 0.5,0.302 10 false 6 5.865,1.698 6.365,2 0.5,0.302 10 false 1 6.042,0.594 6.542,0.896 0.5,0.302 10 false LCTY 6.552,0.302 7.052,0.604 0.5,0.302 10 false +B 5.479,3.167 7.135,3.792 1.656,0.625 10 false Main Body ECU (Multiplex Network Body ECU) 2.896,1.719 3.396,2.021 0.5,0.302 10 false 1 5.479,3 5.979,3.302 0.5,0.302 10 false MB 6.042,1.708 6.542,2.01 0.5,0.302 10 false RCTY 6.573,1.427 7.073,1.729 0.5,0.302 10 false +B

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
RR Door Courtesy Switch Status Rear door courtesy light switch assembly (for RH) signal Close or Open Close: Rear door RH closed
Open: Rear door RH open 		-
RL Door Courtesy Switch Status Rear door courtesy light switch assembly (for LH) signal Close or Open Close: Rear door LH closed
Open: Rear door LH open 		-
Body Electrical > Main Body > Data List
Tester Display
RR Door Courtesy Switch Status
RL Door Courtesy Switch Status
50003 449 32,33
OK:

Normal conditions listed above are displayed.



Result:
Result Proceed to
OK A
NG ("RL Door Courtesy Switch Status" is not normal) B
NG ("RR 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 REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (for LH)

C

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

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

Result:
Proceed to
OK
NG



OK

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

NG

REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (for LH)

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


3.CHECK HARNESS AND CONNECTOR (REAR 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(L6)Location & Routing

Click Connector(L6)Body>No. 2 Floor Wire>Rear Door Courtesy Light Switch Assembly LH

L6-1 - 4E-26 Always Below 1 Ω
L6-1 or 4E-26 - 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
E438203C24
1.552,0.177 1.927,0.406 0.375,0.229 5.302,0.25 5.677,0.479 0.375,0.229 4.594,0.896 4.458,1.313 true 0.26,0.104 0.5,0.302 0.24,0.198 10 false *a 4.292,1.333 4.729,1.51 0.438,0.177 10 false LCTY 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-26 - MB-6 (LCTY) 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 REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (for RH)

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

Result:
Proceed to
OK
NG



OK

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

NG

REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (for RH)

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


6.CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (for RH) - 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(K4)Location & Routing

Click Connector(K4)Body>Floor Wire>Rear Door Courtesy Light Switch Assembly RH

K4-1 - 4E-1 Always Below 1 Ω
K4-1 or 4E-1 - 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
E438203C25
1.552,0.177 1.927,0.406 0.375,0.229 5.302,0.25 5.677,0.479 0.375,0.229 4.073,0.896 3.938,1.313 true 0.26,0.104 0.5,0.302 0.24,0.198 10 false *a 3.781,1.344 4.219,1.521 0.438,0.177 10 false RCTY 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-1 - MB-1 (RCTY) 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