RM38N0EC _59 Vehicle Exterior _111834 LIGHTING (EXT) _0499887 LIGHTING SYSTEM J

LIGHTING (EXT)  LIGHTING SYSTEM  Door Mirror Foot Light Circuit  


DESCRIPTION

The main body ECU (multiplex network body ECU) controls the door mirror foot lights.

WIRING DIAGRAM

E442816E04
5.656,0.792 6.271,0.99 0.615,0.198 10 false MILE 6.063,0.281 6.677,0.479 0.615,0.198 10 false +B 5.448,0.792 6.063,0.99 0.615,0.198 10 false 2 5.167,2.854 5.781,3.052 0.615,0.198 10 false E38 1.542,1.677 3.927,1.969 2.385,0.292 10 false Outer Rear View Mirror Assembly LH 1.531,1.51 2.01,1.708 0.479,0.198 10 false G15*1 1.344,0.792 1.823,0.99 0.479,0.198 10 false 16 3.24,0.792 3.719,0.99 0.479,0.198 10 false 8*2 1.625,0.792 2.104,0.99 0.479,0.198 10 false MLP- 2.833,0.792 3.313,0.99 0.479,0.198 10 false MLP 5.177,3.031 6.844,3.406 1.667,0.375 10 false Main Body ECU (Multiplex Network Body ECU) 1.354,2.281 1.833,2.479 0.479,0.198 10 false 16 1.625,2.292 2.104,2.49 0.479,0.198 10 false MLP- 2.844,2.281 3.323,2.479 0.479,0.198 10 false MLP 3.24,2.281 3.719,2.479 0.479,0.198 10 false 8*2 1.552,2.99 2.031,3.188 0.479,0.198 10 false G13*1 1.563,3.146 3.958,3.438 2.396,0.292 10 false Outer Rear View Mirror Assembly RH 2.125,2.615 2.927,2.875 0.802,0.26 10 false Foot Light 2.115,1.135 2.917,1.396 0.802,0.26 10 false Foot Light 2.063,1.5 2.542,1.698 0.479,0.198 10 false G24*2 2.104,2.99 2.583,3.188 0.479,0.198 10 false G23*2 3.219,0.615 3.698,0.813 0.479,0.198 10 false 18*1 3.219,2.115 3.698,2.313 0.479,0.198 10 false 18*1 0.094,3.469 1.073,3.75 0.979,0.281 10 false *1: w/ Memory 1.365,3.469 2.344,3.75 0.979,0.281 10 false *2: w/o Memory

CAUTION / NOTICE / HINT

NOTICE:

If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.


PROCEDURE

1.PERFORM ACTIVE TEST USING GTS
a.

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
Exterior Illumination Door mirror foot lights OFF or ON -
Body Electrical > Main Body > Active Test
Tester Display
Exterior Illumination
50004 449 25
OK:

Door mirror foot lights illuminate.



Result:
Result Proceed to
OK A
NG (Left side door mirror foot light does not illuminate) B
NG (Right side door mirror foot light does not illuminate) C
NG (Both left and right door mirror foot lights do not illuminate) D



A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM>PROBLEM SYMPTOMS TABLE


B

2.INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH

C

4.INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH

D

6.CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
2.INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH
a.
E481287C01
1.469,0.323 1.969,0.573 0.5,0.25 1.854,1.469 2.583,1 true 0.906,0.958 1.573,1.479 true 0.115,0.146 0.427,0.302 0.313,0.156 10 false *a 0.521,0.854 1,1.115 0.479,0.26 10 false MLP- 1.594,0.375 1.906,0.531 0.313,0.156 10 false G15 2.635,0.906 3.073,1.083 0.438,0.177 10 false MLP
*a Component without harness connected
(Outer Rear View Mirror Assembly LH)


Remove the outer rear view mirror assembly LH. ( w/ Memory)

Click hereVehicle Exterior>MIRROR (EXT)>OUTER REAR VIEW MIRROR>REMOVAL


b.
E182505C24
1.469,0.323 1.969,0.573 0.5,0.25 2.24,1.375 2.646,1.063 true 2.698,1.865 2.25,1.615 true 0.115,0.146 0.427,0.302 0.313,0.156 10 false *a 2.75,1.823 3.229,2.083 0.479,0.26 10 false MLP- 1.594,0.375 1.906,0.531 0.313,0.156 10 false G24 2.708,0.99 3.146,1.167 0.438,0.177 10 false MLP
*a Component without harness connected
(Outer Rear View Mirror Assembly LH)


Remove the outer rear view mirror assembly LH. ( w/o Memory)

Click hereVehicle Exterior>MIRROR (EXT)>OUTER REAR VIEW MIRROR>REMOVAL


c.

Apply auxiliary battery voltage to the door mirror foot light and check that the light illuminates.

OK:
w/ Memory
Measurement Condition Specified Condition
Auxiliary battery positive (+) → Terminal 18 (MLP)
Auxiliary battery negative (-) → Terminal 16 (MLP-) 		Door mirror foot light illuminates

w/o Memory
Measurement Condition Specified Condition
Auxiliary battery positive (+) → Terminal 8 (MLP)
Auxiliary battery negative (-) → Terminal 16 (MLP-) 		Door mirror foot light illuminates



Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

NG

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

Click hereVehicle Exterior>MIRROR (EXT)>OUTER REAR VIEW MIRROR>REMOVAL


3.CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)
a.

Disconnect the E38 main body ECU (multiplex network body ECU) connector.


b.

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

Standard Resistance:
w/ Memory
Tester Connection Condition Specified Condition

Click Location & Routing(G15,E38)Location & Routing

Click Connector(G15)Body>Front Door Wire RH / Front Door Wire LH>Outer Rear View Mirror Assembly LH

Click Connector(E38)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Multiplex Network Body ECU

G15-18 (MLP) - E38-2 (MILE) Always Below 1 Ω
G15-16 (MLP-) - Body ground Always Below 1 Ω

w/o Memory
Tester Connection Condition Specified Condition

Click Location & Routing(G24,E38)Location & Routing

Click Connector(G24)Body>Front Door Wire RH / Front Door Wire LH>Outer Rear View Mirror Assembly LH

Click Connector(E38)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Multiplex Network Body ECU

G24-8 (MLP) - E38-2 (MILE) Always Below 1 Ω
G24-16 (MLP-) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH
a.
E481287C07
1.469,0.323 1.969,0.573 0.5,0.25 1.854,1.469 2.583,1 true 0.906,0.958 1.573,1.479 true 0.115,0.146 0.427,0.302 0.313,0.156 10 false *a 0.521,0.854 1,1.115 0.479,0.26 10 false MLP- 1.594,0.375 1.906,0.531 0.313,0.156 10 false G13 2.635,0.906 3.073,1.083 0.438,0.177 10 false MLP
*a Component without harness connected
(Outer Rear View Mirror Assembly RH)


Remove the outer rear view mirror assembly RH. ( w/ Memory)

Click hereVehicle Exterior>MIRROR (EXT)>OUTER REAR VIEW MIRROR>REMOVAL


b.
E182505C25
1.469,0.323 1.969,0.573 0.5,0.25 2.24,1.375 2.646,1.063 true 2.698,1.865 2.25,1.615 true 0.115,0.146 0.427,0.302 0.313,0.156 10 false *a 2.75,1.823 3.229,2.083 0.479,0.26 10 false MLP- 1.594,0.375 1.906,0.531 0.313,0.156 10 false G23 2.708,0.99 3.146,1.167 0.438,0.177 10 false MLP
*a Component without harness connected
(Outer Rear View Mirror Assembly RH)


Remove the outer rear view mirror assembly RH. ( w/o Memory)

Click hereVehicle Exterior>MIRROR (EXT)>OUTER REAR VIEW MIRROR>REMOVAL


c.

Apply auxiliary battery voltage to the door mirror foot light and check that the light illuminates.

OK:
w/ Memory
Measurement Condition Specified Condition
Auxiliary battery positive (+) → Terminal 18 (MLP)
Auxiliary battery negative (-) → Terminal 16 (MLP-) 		Door mirror foot light illuminates

w/o Memory
Measurement Condition Specified Condition
Auxiliary battery positive (+) → Terminal 8 (MLP)
Auxiliary battery negative (-) → Terminal 16 (MLP-) 		Door mirror foot light illuminates



Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

NG

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH

Click hereVehicle Exterior>MIRROR (EXT)>OUTER REAR VIEW MIRROR>REMOVAL


5.CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)
a.

Disconnect the E38 main body ECU (multiplex network body ECU) connector.


b.

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

Standard Resistance:
w/ Memory
Tester Connection Condition Specified Condition

Click Location & Routing(G13,E38)Location & Routing

Click Connector(G13)Body>Front Door Wire RH / Front Door Wire LH>Outer Rear View Mirror Assembly RH

Click Connector(E38)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Multiplex Network Body ECU

G13-18 (MLP) - E38-2 (MILE) Always Below 1 Ω
G13-16 (MLP-) - Body ground Always Below 1 Ω

w/o Memory
Tester Connection Condition Specified Condition

Click Location & Routing(G23,E38)Location & Routing

Click Connector(G23)Body>Front Door Wire RH / Front Door Wire LH>Outer Rear View Mirror Assembly RH

Click Connector(E38)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Multiplex Network Body ECU

G23-8 (MLP) - E38-2 (MILE) Always Below 1 Ω
G23-16 (MLP-) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
a.

Disconnect the G15 outer rear view mirror assembly LH connector. (w/ Memory)


b.

Disconnect the G24 outer rear view mirror assembly LH connector. (w/o Memory)


c.

Disconnect the G13 outer rear view mirror assembly RH connector. (w/ Memory)


d.

Disconnect the G23 outer rear view mirror assembly RH connector. (w/o Memory)


e.

Disconnect the E38 main body ECU (multiplex network body ECU) connector.


f.

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

Standard Resistance:
w/ Memory
Tester Connection Condition Specified Condition

Click Location & Routing(G15,E38,G13)Location & Routing

Click Connector(G15)Body>Front Door Wire RH / Front Door Wire LH>Outer Rear View Mirror Assembly LH

Click Connector(E38)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Multiplex Network Body ECU

Click Connector(G13)Body>Front Door Wire RH / Front Door Wire LH>Outer Rear View Mirror Assembly RH

G15-18 (MLP) - E38-2 (MILE) Always Below 1 Ω
G13-18 (MLP) - E38-2 (MILE) Always Below 1 Ω
G15-18 (MLP), G13-18 (MLP) or E38-2 (MILE) - Body ground Always 10 kΩ or higher

w/o Memory
Tester Connection Condition Specified Condition

Click Location & Routing(G24,E38,G23)Location & Routing

Click Connector(G24)Body>Front Door Wire RH / Front Door Wire LH>Outer Rear View Mirror Assembly LH

Click Connector(E38)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Multiplex Network Body ECU

Click Connector(G23)Body>Front Door Wire RH / Front Door Wire LH>Outer Rear View Mirror Assembly RH

G24-8 (MLP) - E38-2 (MILE) Always Below 1 Ω
G23-8 (MLP) - E38-2 (MILE) Always Below 1 Ω
G24-8 (MLP), G23-8 (MLP) or E38-2 (MILE) - 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