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

LIGHTING (INT)  LIGHTING SYSTEM  Back Door Courtesy Switch Circuit  


DESCRIPTION

The main body ECU (multiplex network body ECU) receives a back door open/closed signal from the back door lock assembly with courtesy light switch.

WIRING DIAGRAM

w/o Power Back Door System
E432569E03
1.656,0.792 2.313,1.125 0.656,0.333 10 false 2 1.854,0.802 2.51,1.135 0.656,0.333 10 false ACT- 2.698,0.802 3.354,1.135 0.656,0.333 10 false D+ 2.979,0.802 3.635,1.135 0.656,0.333 10 false 3 1.552,1.208 2.208,1.542 0.656,0.333 10 false T7 1.552,1.385 3.24,1.74 1.688,0.354 10 false Back Door Lock Assembly with Courtesy Light Switch 4.354,0.781 5.01,1.115 0.656,0.333 10 false 2 4.5,1.521 5.938,1.885 1.438,0.365 10 false Power Distribution Box Assembly 5.813,0.781 6.469,1.115 0.656,0.333 10 false 19 6.073,0.74 6.729,1.073 0.656,0.333 10 false BCTY 5.5,2.156 7.125,2.563 1.625,0.406 10 false Main Body ECU (Multiplex Network Body ECU) 4.5,1.354 4.813,1.552 0.313,0.198 10 false 4E 5.5,2 5.813,2.198 0.313,0.198 10 false MB 6.49,0.458 6.802,0.656 0.313,0.198 10 false +B

w/ Power Back Door System
E432340E03
1.615,1.406 3.5,1.781 1.885,0.375 10 false Back Door Lock Assembly with Courtesy Light Switch 1.615,1.24 2.073,1.438 0.458,0.198 10 false T9 2.677,0.854 3.135,1.052 0.458,0.198 10 false CTY 1.927,0.865 2.385,1.063 0.458,0.198 10 false E 2.688,2.438 3.146,2.635 0.458,0.198 10 false FUL 1.573,2.844 2.031,3.042 0.458,0.198 10 false T12 5.479,2.094 5.938,2.292 0.458,0.198 10 false MB 4.625,1.573 6.073,1.979 1.448,0.406 10 false Power Distribution Box Assembly 4.604,1.406 5.063,1.604 0.458,0.198 10 false 4E 4.438,0.854 4.896,1.052 0.458,0.198 10 false 2 5.885,0.854 6.344,1.052 0.458,0.198 10 false 19 5.479,2.26 7.156,2.646 1.677,0.385 10 false Main Body ECU (Multiplex Network Body ECU) 1.573,3.01 5.552,3.208 3.979,0.198 10 false Multiplex Network Door ECU 3.031,2.333 3.49,2.531 0.458,0.198 10 false 11 3.042,0.854 3.5,1.052 0.458,0.198 10 false 4 1.729,0.865 2.188,1.063 0.458,0.198 10 false 1 6.115,0.792 6.625,1 0.51,0.208 10 false BCTY 6.531,0.552 6.844,0.75 0.313,0.198 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
Back Door Courtesy Switch Status Back door courtesy switch signal Close or Open Close: Back door closed
Open: Back door open 		-
Body Electrical > Main Body > Data List
Tester Display
Back Door Courtesy Switch Status
50003 449 34
OK:

Normal conditions listed above are displayed.



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.INSPECT BACK DOOR LOCK ASSEMBLY WITH COURTESY LIGHT SWITCH
2.INSPECT BACK DOOR LOCK ASSEMBLY WITH COURTESY LIGHT SWITCH

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

Result:
Result Proceed to
OK (w/o Power Back Door System) A
OK (w/ Power Back Door System) B
NG C



A

3.CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY WITH COURTESY LIGHT SWITCH - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND)

B

5.CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY WITH COURTESY LIGHT SWITCH - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND)

C

REPLACE BACK DOOR LOCK ASSEMBLY WITH COURTESY LIGHT SWITCH

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


3.CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY WITH COURTESY LIGHT SWITCH - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND)
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(T7)Location & Routing

Click Connector(T7)Body>No. 1 Back Door Wire>Back Door Lock Assembly with Courtesy Light Switch

T7-3 (D+) - 4E-2 Always Below 1 Ω
T7-3 (D+) or 4E-2 - Body ground Always 10 kΩ or higher
T7-2 (ACT-) - Body ground Always Below 1 Ω



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
E438203C26
1.552,0.177 1.927,0.406 0.375,0.229 5.302,0.25 5.677,0.479 0.375,0.229 5.948,0.885 5.813,1.302 true 0.26,0.104 0.5,0.302 0.24,0.198 10 false *a 5.5,1.333 5.938,1.51 0.438,0.177 10 false BCTY 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-2 - MB-19 (BCTY) 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.CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY WITH COURTESY LIGHT SWITCH - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND)
a.

Disconnect the 4E power distribution box assembly connector.


b.

Disconnect the T12 multiplex network door ECU connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(T9)Location & Routing

Click Connector(T9)Body>No. 1 Back Door Wire>Back Door Lock Assembly with Courtesy Light Switch

T9-4 (CTY) - 4E-2 Always Below 1 Ω
T9-4 (CTY) or 4E-2 - Body ground Always 10 kΩ or higher
T9-1 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

6.INSPECT POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.INSPECT POWER DISTRIBUTION BOX ASSEMBLY
E438203C26
1.552,0.177 1.927,0.406 0.375,0.229 5.302,0.25 5.677,0.479 0.375,0.229 5.948,0.885 5.813,1.302 true 0.26,0.104 0.5,0.302 0.24,0.198 10 false *a 5.5,1.333 5.938,1.51 0.438,0.177 10 false BCTY 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-2 - MB-19 (BCTY) 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