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

LIGHTING (EXT)  LIGHTING SYSTEM  Taillight Relay Circuit  


DESCRIPTION

The main body ECU (multiplex network body ECU) controls the operation of the TAIL relay.

WIRING DIAGRAM

E480265E01
0.219,0.583 1.792,0.833 1.573,0.25 10 false from Auxiliary Battery 2.271,0.781 3.656,1 1.385,0.219 10 false INT STD NO. 1-1 4.646,1.271 5.49,1.521 0.844,0.25 10 false TAIL 5.583,0.802 6.427,1.052 0.844,0.25 10 false IC 6.25,0.802 7.094,1.052 0.844,0.25 10 false CXP1 3.656,0.615 4.5,0.865 0.844,0.25 10 false 4G 3.667,1.229 4.51,1.479 0.844,0.25 10 false 4E 3.698,0.406 4.542,0.656 0.844,0.25 10 false 1 3.719,1.01 4.563,1.26 0.844,0.25 10 false 7 4.042,1.677 6.219,1.906 2.177,0.229 10 false Power Distribution Box Assembly 2.042,2.417 2.885,2.667 0.844,0.25 10 false TL 3.417,2.427 4.26,2.677 0.844,0.25 10 false E 1.823,2.406 2.667,2.656 0.844,0.25 10 false 1 3.635,2.417 4.479,2.667 0.844,0.25 10 false 3 1.667,2.917 2.51,3.167 0.844,0.25 10 false L15 1.656,3.167 4.177,3.417 2.521,0.25 10 false Rear Combination Light Assembly LH 5.458,4.521 7.125,5.01 1.667,0.49 10 false Main Body ECU (Multiplex Network Body ECU) 5.99,0.635 6.833,0.885 0.844,0.25 10 false 22 2.531,3.99 3.427,4.26 0.896,0.271 10 false Taillight 2.031,3.719 2.875,3.969 0.844,0.25 10 false TL 3.417,3.719 4.26,3.969 0.844,0.25 10 false E 1.844,3.719 2.688,3.969 0.844,0.25 10 false 1 3.625,3.708 4.469,3.958 0.844,0.25 10 false 3 1.677,4.26 2.521,4.51 0.844,0.25 10 false K15 1.823,5.031 2.667,5.281 0.844,0.25 10 false 2 2.042,5.042 2.885,5.292 0.844,0.25 10 false B 3.427,5.021 4.271,5.271 0.844,0.25 10 false E 3.604,5.031 4.448,5.281 0.844,0.25 10 false 1 2.542,5.302 3.406,5.635 0.865,0.333 10 false Taillight 2.188,8.49 3.646,8.823 1.458,0.333 10 false License Plate Light 1.75,5.552 1.99,5.813 0.24,0.26 10 false a2 1.76,6.958 2,7.219 0.24,0.26 10 false a1 1.875,5.792 3.729,6.115 1.854,0.323 10 false Rear Light Assembly LH 2.042,6.448 2.885,6.698 0.844,0.25 10 false B 3.427,6.427 4.271,6.677 0.844,0.25 10 false E 1.865,6.438 2.708,6.688 0.844,0.25 10 false 2 3.615,6.417 4.458,6.667 0.844,0.25 10 false 1 2.063,8.188 2.906,8.438 0.844,0.25 10 false B 3.427,8.167 4.271,8.417 0.844,0.25 10 false E 1.833,8.188 2.677,8.438 0.844,0.25 10 false 4 3.635,8.177 4.479,8.427 0.844,0.25 10 false 5 2.51,6.719 3.375,7.052 0.865,0.333 10 false Taillight 0.885,9.458 3.417,9.792 2.531,0.333 10 false : CXPI Communication Line 1.667,8.76 2.51,9.01 0.844,0.25 10 false T4 1.677,8.948 5.51,9.146 3.833,0.198 10 false License Plate Light Assembly with Back Door Opener Switch 0.271,9.104 1.115,9.354 0.844,0.25 10 false A 2.521,2.719 3.417,2.99 0.896,0.271 10 false Taillight 1.667,4.49 4.188,4.74 2.521,0.25 10 false Rear Combination Light Assembly RH 1.875,7.198 3.729,7.521 1.854,0.323 10 false Rear Light Assembly RH

E480266E01
2.125,1.781 4.625,2 2.5,0.219 10 false Headlight Assembly LH 2.323,1.208 3.5,1.417 1.177,0.208 10 false Clearance Light 2.063,0.906 2.365,1.115 0.302,0.208 10 false B 2.073,2.313 2.375,2.521 0.302,0.208 10 false B 3.438,0.896 3.74,1.104 0.302,0.208 10 false E 3.438,2.313 3.74,2.521 0.302,0.208 10 false E 0.333,0.344 0.635,0.552 0.302,0.208 10 false A 2.354,2.604 3.531,2.813 1.177,0.208 10 false Clearance Light 1.854,0.906 2.156,1.115 0.302,0.208 10 false 7 1.854,2.313 2.156,2.521 0.302,0.208 10 false 7 3.656,0.896 3.958,1.104 0.302,0.208 10 false 5 3.677,2.292 3.979,2.5 0.302,0.208 10 false 5 2.146,3.188 4.646,3.406 2.5,0.219 10 false Headlight Assembly RH 2.104,1.635 2.604,1.875 0.5,0.24 10 false A95 2.146,3.042 2.646,3.281 0.5,0.24 10 false A94

CAUTION / NOTICE / HINT

NOTICE:
·

Inspect the fuses for circuits related to this system before performing the following procedure.

·

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

·

First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CXPI communication malfunctions before troubleshooting this symptom.

Click herePower Source / Network>NETWORKING>CXPI COMMUNICATION SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING



PROCEDURE

1.READ VALUE USING GTS
a.

Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List
Tester Display Measurement Item Normal Condition Reference Value Diagnostic Note
Tail Light Input Signal Taillight input OFF or ON OFF: Taillights off
ON: Taillights on 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Tail Light Input Signal
50003 475 1290
OK:

Display changes according to the taillight illumination condition.



Result:
Proceed to
OK
NG



OK

2.READ VALUE USING GTS

NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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


2.READ VALUE USING GTS
a.

Turn the light control switch to the TAIL position.


b.

Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List
Tester Display Measurement Item Normal Condition Reference Value Diagnostic Note
Tail Light Fuse Shut Off Status Taillight fuse shut off status OFF or ON OFF: Fuse has no shut off history
ON: Fuse has shut off history 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Tail Light Fuse Shut Off Status
50003 475 1293
OK:

The Data List value displays "OFF".



Result:
Proceed to
OK
NG



OK

3.READ VALUE USING GTS

NG

6.CHECK REAR COMBINATION LIGHT ASSEMBLY LH
3.READ VALUE USING GTS
a.

Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List
Tester Display Measurement Item Normal Condition Reference Value Diagnostic Note
Tail Light Output Signal Taillight output OFF or ON OFF: Taillights off
ON: Taillights on 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Tail Light Output Signal
50003 475 1291
OK:

Display changes according to the taillight illumination condition.



Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (POWER SOURCE - POWER DISTRIBUTION BOX ASSEMBLY)

NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

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


4.CHECK HARNESS AND CONNECTOR (POWER SOURCE - POWER DISTRIBUTION BOX ASSEMBLY)
a.

Disconnect the 4G power distribution box assembly connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
4G-1 - Body ground Ignition switch off 11 to 14 V



Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (TAILLIGHT CIRCUIT)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CHECK HARNESS AND CONNECTOR (TAILLIGHT CIRCUIT)
a.

Disconnect the L15 rear combination light assembly LH connector.


b.

Disconnect the K15 rear combination light assembly RH connector.


c.

Disconnect the a2 rear light assembly LH connector.


d.

Disconnect the a1 rear light assembly RH connector.


e.

Disconnect the T4 license plate light assembly with back door opener switch connector.


f.

Disconnect the A95 headlight assembly LH connector.


g.

Disconnect the A94 Headlight assembly RH connector.


h.

Disconnect the 4E power distribution box assembly connector.


i.

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(L15,K15,a2,a1,T4,A95,A94)Location & Routing

Click Connector(L15)Body>No. 2 Floor Wire>Rear Combination Light Assembly LH

Click Connector(K15)Body>Floor Wire>Rear Combination Light Assembly RH

Click Connector(a2)Body>No. 2 Lamp Wire>Rear Light Assembly LH

Click Connector(a1)Body>No. 2 Lamp Wire>Rear Light Assembly RH

Click Connector(T4)Body>No. 1 Back Door Wire>License Plate Light Assembly with Back Door Opener Switch

Click Connector(A95)Engine Compartment>Engine Room Main Wire / Transmission Wire>Headlight Assembly LH

Click Connector(A94)Engine Compartment>Engine Room Main Wire / Transmission Wire>Headlight Assembly RH

L15-1 (TL) - 4E-7 Always Below 1 Ω
K15-1 (TL) - 4E-7 Always Below 1 Ω
a2-2 (B) - 4E-7 Always Below 1 Ω
a1-2 (B) - 4E-7 Always Below 1 Ω
T4-4 (B) - 4E-7 Always Below 1 Ω
A95-7 (B) - 4E-7 Always Below 1 Ω
A94-7 (B) - 4E-7 Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK REAR COMBINATION LIGHT ASSEMBLY LH
a.

Disconnect the L15 rear combination light assembly LH connector.


b.

Turn the light control switch to the TAIL position.


c.

Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List
Tester Display Measurement Item Normal Condition Reference Value Diagnostic Note
Tail Light Fuse Shut Off Status Taillight fuse shut off status OFF or ON OFF: Fuse has no shut off history
ON: Fuse has shut off history 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Tail Light Fuse Shut Off Status
50003 475 1293
OK:

The Data List value displays "OFF".



Result:
Proceed to
OK
NG



OK

REPLACE REAR COMBINATION LIGHT ASSEMBLY LH

Click hereVehicle Exterior>LIGHTING (EXT)>REAR COMBINATION LIGHT ASSEMBLY>REMOVAL


NG

7.CHECK REAR COMBINATION LIGHT ASSEMBLY RH
7.CHECK REAR COMBINATION LIGHT ASSEMBLY RH
a.

Disconnect the K15 rear combination light assembly RH connector.


b.

Turn the light control switch to the TAIL position.


c.

Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List
Tester Display Measurement Item Normal Condition Reference Value Diagnostic Note
Tail Light Fuse Shut Off Status Taillight fuse shut off status OFF or ON OFF: Fuse has no shut off history
ON: Fuse has shut off history 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Tail Light Fuse Shut Off Status
50003 475 1293
OK:

The Data List value displays "OFF".



Result:
Proceed to
OK
NG



OK

REPLACE REAR COMBINATION LIGHT ASSEMBLY RH

Click hereVehicle Exterior>LIGHTING (EXT)>REAR COMBINATION LIGHT ASSEMBLY>REMOVAL


NG

8.CHECK REAR LIGHT ASSEMBLY LH
8.CHECK REAR LIGHT ASSEMBLY LH
a.

Disconnect the a2 rear light assembly LH connector.


b.

Turn the light control switch to the TAIL position.


c.

Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List
Tester Display Measurement Item Normal Condition Reference Value Diagnostic Note
Tail Light Fuse Shut Off Status Taillight fuse shut off status OFF or ON OFF: Fuse has no shut off history
ON: Fuse has shut off history 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Tail Light Fuse Shut Off Status
50003 475 1293
OK:

The Data List value displays "OFF".



Result:
Proceed to
OK
NG



OK

REPLACE REAR LIGHT ASSEMBLY LH

Click hereVehicle Exterior>LIGHTING (EXT)>REAR LIGHT ASSEMBLY>REMOVAL


NG

9.CHECK REAR LIGHT ASSEMBLY RH
9.CHECK REAR LIGHT ASSEMBLY RH
a.

Disconnect the a1 rear light assembly RH connector.


b.

Turn the light control switch to the TAIL position.


c.

Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List
Tester Display Measurement Item Normal Condition Reference Value Diagnostic Note
Tail Light Fuse Shut Off Status Taillight fuse shut off status OFF or ON OFF: Fuse has no shut off history
ON: Fuse has shut off history 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Tail Light Fuse Shut Off Status
50003 475 1293
OK:

The Data List value displays "OFF".



Result:
Proceed to
OK
NG



OK

REPLACE REAR LIGHT ASSEMBLY RH

Click hereVehicle Exterior>LIGHTING (EXT)>REAR LIGHT ASSEMBLY>REMOVAL


NG

10.CHECK LICENSE PLATE LAMP ASSEMBLY WITH BACK DOOR OPENER SWITCH
10.CHECK LICENSE PLATE LAMP ASSEMBLY WITH BACK DOOR OPENER SWITCH
a.

Disconnect the T4 license plate light assembly with back door opener switch connector.


b.

Turn the light control switch to the TAIL position.


c.

Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List
Tester Display Measurement Item Normal Condition Reference Value Diagnostic Note
Tail Light Fuse Shut Off Status Taillight fuse shut off status OFF or ON OFF: Fuse has no shut off history
ON: Fuse has shut off history 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Tail Light Fuse Shut Off Status
50003 475 1293
OK:

The Data List value displays "OFF".



Result:
Proceed to
OK
NG



OK

REPLACE LICENSE PLATE LIGHT ASSEMBLY WITH BACK DOOR OPENER SWITCH

Click hereVehicle Exterior>LIGHTING (EXT)>LICENSE PLATE LIGHT ASSEMBLY>REMOVAL


NG

11.CHECK HEADLIGHT ASSEMBLY LH
11.CHECK HEADLIGHT ASSEMBLY LH
a.

Disconnect the A95 headlight assembly LH connector.


b.

Turn the light control switch to the TAIL position.


c.

Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List
Tester Display Measurement Item Normal Condition Reference Value Diagnostic Note
Tail Light Fuse Shut Off Status Taillight fuse shut off status OFF or ON OFF: Fuse has no shut off history
ON: Fuse has shut off history 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Tail Light Fuse Shut Off Status
50003 475 1293
OK:

The Data List value displays "OFF".



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT ASSEMBLY LH

Click hereVehicle Exterior>LIGHTING (EXT)>LICENSE PLATE LIGHT ASSEMBLY>REMOVAL


NG

12.CHECK HEADLIGHT ASSEMBLY RH
12.CHECK HEADLIGHT ASSEMBLY RH
a.

Disconnect the A94 headlight assembly RH connector.


b.

Turn the light control switch to the TAIL position.


c.

Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List
Tester Display Measurement Item Normal Condition Reference Value Diagnostic Note
Tail Light Fuse Shut Off Status Taillight fuse shut off status OFF or ON OFF: Fuse has no shut off history
ON: Fuse has shut off history 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Tail Light Fuse Shut Off Status
50003 475 1293
OK:

The Data List value displays "OFF".



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT ASSEMBLY RH

Click hereVehicle Exterior>LIGHTING (EXT)>LICENSE PLATE LIGHT ASSEMBLY>REMOVAL


NG

13.CHECK HARNESS AND CONNECTOR (TAILLIGHT CIRCUIT)
13.CHECK HARNESS AND CONNECTOR (TAILLIGHT CIRCUIT)
a.

Disconnect the L15 rear combination light assembly LH connector.


b.

Disconnect the K15 rear combination light assembly RH connector.


c.

Disconnect the a2 rear light assembly LH connector.


d.

Disconnect the a1 rear light assembly RH connector.


e.

Disconnect the T4 license plate light assembly with back door opener switch connector.


f.

Disconnect the A95 headlight assembly LH connector.


g.

Disconnect the A94 Headlight assembly RH connector.


h.

Disconnect the 4E power distribution box assembly connector.


i.

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(L15,K15,a2,a1,T4,A95,A94)Location & Routing

Click Connector(L15)Body>No. 2 Floor Wire>Rear Combination Light Assembly LH

Click Connector(K15)Body>Floor Wire>Rear Combination Light Assembly RH

Click Connector(a2)Body>No. 2 Lamp Wire>Rear Light Assembly LH

Click Connector(a1)Body>No. 2 Lamp Wire>Rear Light Assembly RH

Click Connector(T4)Body>No. 1 Back Door Wire>License Plate Light Assembly with Back Door Opener Switch

Click Connector(A95)Engine Compartment>Engine Room Main Wire / Transmission Wire>Headlight Assembly LH

Click Connector(A94)Engine Compartment>Engine Room Main Wire / Transmission Wire>Headlight Assembly RH

L15-1 (TL), K15-1 (TL), a2-2 (B), a1-2 (B), T4-4 (B), A95-7(B), A94-7(B) or 4E-7 - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR