RM3660EC _59 Vehicle Exterior _080784 LIGHTING (EXT) _0600055 LIGHTING SYSTEM(for NR Series Engine) J

LIGHTING (EXT)  LIGHTING SYSTEM(for NR Series Engine)  Front Fog Light Circuit  


DESCRIPTION

The main body ECU (multiplex network body ECU) controls the front fog lights.

WIRING DIAGRAM

E386590E23
1.938,2.531 2.854,2.729 0.917,0.198 10 false FOG FR 0.479,0.521 1.375,0.969 0.896,0.448 10 false from Battery 1.938,0.698 2.854,0.896 0.917,0.198 10 false J/B-AM 3.854,0.563 4.167,0.76 0.313,0.198 10 false 4D 3.854,1.469 4.167,1.667 0.313,0.198 10 false 4F 3.854,2.052 4.167,2.25 0.313,0.198 10 false 4E 3.885,0.365 4.042,0.563 0.156,0.198 10 false 1 3.854,1.271 4.167,1.469 0.313,0.198 10 false 11 3.865,1.854 4.177,2.052 0.313,0.198 10 false 52 3.479,1.938 3.635,2.135 0.156,0.198 10 false 1 2.802,1.948 2.958,2.146 0.156,0.198 10 false 2 3.49,2.271 3.646,2.469 0.156,0.198 10 false 3 2.802,2.271 2.958,2.469 0.156,0.198 10 false 5 2.948,2.656 3.865,2.854 0.917,0.198 10 false FR FOG 5.083,1.604 5.698,1.802 0.615,0.198 10 false TAIL 5.073,1.167 5.688,1.365 0.615,0.198 10 false TAIL 5.781,0.458 6.094,0.656 0.313,0.198 10 false 14 6.042,0.458 6.656,0.656 0.615,0.198 10 false TRLY 6.042,1.948 6.656,2.146 0.615,0.198 10 false FFGO 5.833,1.948 5.99,2.146 0.156,0.198 10 false 7 4.26,2.521 5.896,3.417 1.635,0.896 10 false Driver Side Junction Block Assembly 2.854,3.094 3.01,3.292 0.156,0.198 10 false 2 1.385,3.083 1.542,3.281 0.156,0.198 10 false 1 2.656,4.51 2.813,4.708 0.156,0.198 10 false B 2.656,3.094 2.813,3.292 0.156,0.198 10 false B 2.885,4.5 3.042,4.698 0.156,0.198 10 false 2 1.573,4.5 1.729,4.698 0.156,0.198 10 false E 1.573,3.094 1.729,3.292 0.156,0.198 10 false E 1.396,4.49 1.552,4.688 0.156,0.198 10 false 1 1.854,3.365 2.771,3.563 0.917,0.198 10 false Fog Light 1.896,4.781 2.813,4.979 0.917,0.198 10 false Fog Light 1.458,3.771 1.917,3.969 0.458,0.198 10 false A43 1.458,3.906 3.448,4.104 1.99,0.198 10 false Fog Light Assembly LH 1.438,5.177 1.896,5.375 0.458,0.198 10 false A42 1.438,5.313 3.427,5.51 1.99,0.198 10 false Fog Light Assembly RH 5.385,4.552 5.698,4.75 0.313,0.198 10 false MB 5.385,4.74 7.042,5.479 1.656,0.74 10 false Main Body ECU (Multiplex Network Body ECU)


CAUTION / NOTICE / HINT

NOTICE:
·

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

·

Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.



PROCEDURE

1.CHECK OPERATION (TAILLIGHTS)
a.

Check the operation of the taillights.

OK:

Taillights operate normally.



Result:
Proceed to
OK
NG



OK

2.PERFORM ACTIVE TEST USING GTS

NG

GO TO PROBLEM SYMPTOMS TABLE

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (for NR Series Engine)>PROBLEM SYMPTOMS TABLE


2.PERFORM ACTIVE TEST 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 / Active Test.


e.

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
Front Fog Light Relay Front fog lights OFF or ON Light control switch in tail position
Body Electrical > Main Body > Active Test
Tester Display
Front Fog Light Relay
50004 123 16
OK:

Front fog light relay operates. (Front fog lights come on.)



Result:
Result Proceed to
OK A
NG B



A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (for NR Series Engine)>PROBLEM SYMPTOMS TABLE


B

3.CHECK HARNESS AND CONNECTOR (POWER SOURCE - FR FOG RELAY)
3.CHECK HARNESS AND CONNECTOR (POWER SOURCE - FR FOG RELAY)
a.

Remove the FR FOG relay.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
5 (FR FOG relay) - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (FR FOG RELAY INPUT VOLTAGE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK HARNESS AND CONNECTOR (FR FOG RELAY INPUT VOLTAGE)
a.

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

Standard Voltage:
Tester Connection Condition Specified Condition
2 (FR FOG relay) - Body ground Light control switch in tail or head position 11 to 14 V



Result:
Proceed to
OK
NG



OK

5.INSPECT FR FOG RELAY

NG

9.CHECK HARNESS AND CONNECTOR (FR FOG RELAY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY)
5.INSPECT FR FOG RELAY
a.

Inspect the FR FOG relay.

Click hereVehicle Exterior>LIGHTING (EXT)>RELAY>ON-VEHICLE INSPECTION


Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (FR FOG RELAY - FOG LIGHT ASSEMBLY)

NG

REPLACE FR FOG RELAY

6.CHECK HARNESS AND CONNECTOR (FR FOG RELAY - FOG LIGHT ASSEMBLY)
a.

Disconnect the A43 fog light assembly LH connector.


b.

Disconnect the A42 fog light assembly RH connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3 (FR FOG relay) - A43-2 (B) Always Below 1 Ω
3 (FR FOG relay) - A42-2 (B) Always Below 1 Ω
3 (FR FOG relay) or A43-2 (B) - Body ground Always 10 kΩ or higher
3 (FR FOG relay) or A42-2 (B) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

7.CHECK HARNESS AND CONNECTOR (FR FOG RELAY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CHECK HARNESS AND CONNECTOR (FR FOG RELAY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY)
a.

Disconnect the 4E driver side junction block assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
1 (FR FOG relay) - 4E-52 Always Below 1 Ω
1 (FR FOG relay) or 4E-52 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

8.INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY
E410247C01
4.76,0.396 5.063,0.635 0.302,0.24 1.406,0.188 1.708,0.427 0.302,0.24 3.99,1.26 3.896,0.979 false 0.156,0.167 0.469,0.365 0.313,0.198 10 false *a 3.875,1.292 4.344,1.552 0.469,0.26 10 false FFGO 4.802,0.438 5.271,0.698 0.469,0.26 10 false MB 1.469,0.229 1.781,0.396 0.313,0.167 10 false 4E
*a Component without harness connected
(Driver Side Junction Block Assembly) 		- -


a.

Remove the main body ECU (multiplex network body ECU) from the driver side junction block 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-52 - MB-7 (FFGO) 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 DRIVER SIDE JUNCTION BLOCK ASSEMBLY

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


9.CHECK HARNESS AND CONNECTOR (FR FOG RELAY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY)
a.

Disconnect the 4F driver side junction block assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
2 (FR FOG relay) - 4F-11 Always Below 1 Ω
2 (FR FOG relay) or 4F-11 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR