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

E235090E16
5.635,0.875 6.104,1.208 0.469,0.333 10 false MB 5.667,1.938 5.844,2.115 0.177,0.177 10 false 19 5.625,2.135 6.021,2.406 0.396,0.271 10 false E31 5.698,0.677 5.969,0.927 0.271,0.25 10 false 2 4.469,0.677 4.927,0.979 0.458,0.302 10 false 37 4.458,0.875 4.979,1.198 0.521,0.323 10 false 3E 6.031,0.885 6.625,1.198 0.594,0.313 10 false FLCY 6.01,2.135 6.635,2.396 0.625,0.26 10 false FRCY 1.115,1.083 1.458,1.26 0.344,0.177 10 false L1 1.115,1.24 4.177,1.479 3.063,0.24 10 false Front Door Courtesy Light Switch Assembly LH 1.083,2.323 1.427,2.5 0.344,0.177 10 false L36 1.083,2.49 4.167,2.667 3.083,0.177 10 false Front Door Courtesy Light Switch Assembly RH 3.188,2 3.281,2.177 0.094,0.177 10 false 1 3.177,0.76 3.271,0.938 0.094,0.177 10 false 1 4.26,1.375 5.896,1.865 1.635,0.49 10 false Instrument Panel Junction Block Assembly 5.406,2.844 7.104,3.313 1.698,0.469 10 false Main Body ECU (Multiplex Network Body ECU)

PROCEDURE

1.READ VALUE 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 / Data List.


e.

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 SW Front door courtesy light switch assembly RH signal ON or OFF ON: Front door RH open
OFF: Front door RH closed 		-
FL Door Courtesy SW Front door courtesy light switch assembly LH signal ON or OFF ON: Front door LH open
OFF: Front door LH closed 		-
Body Electrical > Main Body > Data List
Tester Display
FR Door Courtesy SW
FL Door Courtesy SW
50003 123 197,199
OK:

Normal conditions listed above are displayed.



Result:
Result Proceed to
OK A
"FR Door Courtesy SW" is not normal B
"FL Door Courtesy SW" 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 RH

C

4.INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH
2.INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH
a.

Remove the front door courtesy light switch assembly RH.

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


b.

Inspect the front door courtesy light switch assembly RH.

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 RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

NG

REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH

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


3.CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
a.

Disconnect the E31 main body ECU (multiplex network body ECU) connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
L36-1 - E31-19 (FRCY) Always Below 1 Ω
L36-1 or E31-19 (FRCY) - Body ground 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

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH
a.

Remove the front door courtesy light switch assembly LH.

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


b.

Inspect the front door courtesy light switch assembly LH.

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


Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

NG

REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH

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


5.CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
a.

Disconnect the 3E 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
L1-1 - 3E-37 Always Below 1 Ω
L1-1 or 3E-37 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

6.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.INSPECT 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.

E258622C04
1.188,0.323 1.521,0.542 0.333,0.219 4.667,0.448 5,0.667 0.333,0.219 2.99,1.417 3.125,1.031 false 4.729,0.479 5.042,0.677 0.313,0.198 10 MB 1.271,0.354 1.583,0.552 0.313,0.198 10 3E 0.188,0.135 0.51,0.469 0.323,0.333 10 *a 2.854,1.448 3.469,1.646 0.615,0.198 10 FLCY
*a Component without harness connected
(Instrument Panel Junction Block Assembly) 		- -


Standard Resistance:
Tester Connection Condition Specified Condition
3E-37 - 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 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

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