RM35X0E _59 Vehicle Exterior _079256 LIGHTING (EXT) _0396321 LIGHTING SYSTEM(w/ Headlight ECU) J

LIGHTING (EXT)  LIGHTING SYSTEM(w/ Headlight ECU)  Front Fog Light Circuit  


DESCRIPTION

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

WIRING DIAGRAM

E418408E01
2.906,0.604 4.177,0.844 1.271,0.24 10 false from Battery 3.917,1.938 5.604,2.135 1.688,0.198 10 false FR FOG 3.688,3.594 5.688,4.24 2,0.646 10 false Instrument Panel Junction Block Assembly 0.906,1.844 1.406,2.052 0.5,0.208 10 false B6 0.896,2.01 2.583,2.208 1.688,0.198 10 false Fog Light Assembly LH 0.906,3.76 2.594,3.958 1.688,0.198 10 false B5 0.781,1.26 1.281,1.469 0.5,0.208 10 false 1 0.969,1.26 1.469,1.469 0.5,0.208 10 false E 2.198,1.25 2.698,1.458 0.5,0.208 10 false B 2.385,1.25 2.885,1.458 0.5,0.208 10 false 2 4.521,0.802 6.208,1 1.688,0.198 10 false FOG FR 3.75,1.604 4.25,1.813 0.5,0.208 10 false 1 4.521,1.229 5.021,1.438 0.5,0.208 10 false 3 4.531,1.615 5.031,1.823 0.5,0.208 10 false 2 3.75,1.25 4.25,1.458 0.5,0.208 10 false 5 3.365,2.792 3.865,3 0.5,0.208 10 false 32 5.271,1.573 5.771,1.781 0.5,0.208 10 false 25 4.625,2.917 6.313,3.115 1.688,0.198 10 false from TAIL Relay 3.875,3.073 5.563,3.271 1.688,0.198 10 false TAIL 6.042,1.708 6.542,1.917 0.5,0.208 10 false FFGO 5.875,1.594 6.375,1.802 0.5,0.208 10 false 7 5.521,4.323 6.021,4.531 0.5,0.208 10 false A 5.51,4.479 7.156,4.938 1.646,0.458 10 false Main Body ECU (Multiplex Network Body ECU) 1.354,1.552 3.042,1.75 1.688,0.198 10 false Fog Light 2.188,3.125 2.688,3.333 0.5,0.208 10 false B 0.979,3.135 1.479,3.344 0.5,0.208 10 false E 0.802,3.146 1.302,3.354 0.5,0.208 10 false 1 2.375,3.135 2.875,3.344 0.5,0.208 10 false 2 1.333,3.438 3.021,3.635 1.688,0.198 10 false Fog Light 0.927,3.969 2.615,4.167 1.688,0.198 10 false Fog Light Assembly RH 3.688,3.427 5.375,3.625 1.688,0.198 10 false 3C

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.PERFORM ACTIVE TEST USING GTS
a.

Connect the GTS to the DLC3.


b.

Turn the engine switch on (IG).


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 light Relay 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:
Proceed to
OK
NG



OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (w/ Headlight ECU)>PROBLEM SYMPTOMS TABLE


NG

2.CHECK HARNESS AND CONNECTOR (FR FOG RELAY - BATTERY)
2.CHECK HARNESS AND CONNECTOR (FR FOG RELAY - BATTERY)
a.

Remove the FR FOG relay.


b.
B340809C08
0.115,0.083 0.427,0.281 0.313,0.198 10 false *a
*a Front view of wire harness connector
(to FR FOG Relay)


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

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



Result:
Proceed to
OK
NG



OK

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

Remove the FR FOG relay.


b.
B340809C08
0.115,0.083 0.427,0.281 0.313,0.198 10 false *a
*a Front view of wire harness connector
(to FR FOG Relay)


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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
1 (FR FOG relay) - Body ground Light control switch in TAIL or HEAD position 11 to 14 V



Result:
Proceed to
OK
NG



OK

4.INSPECT FR FOG RELAY

NG

8.CHECK HARNESS AND CONNECTOR (FR FOG RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
4.INSPECT FR FOG RELAY
a.

Remove the FR FOG relay.


b.

Inspect the FR FOG relay.

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


Result:
Proceed to
OK
NG



OK

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

NG

REPLACE FR FOG RELAY

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

Remove the FR FOG relay.


b.

Disconnect the B6 fog light assembly LH connector.


c.

Disconnect the B5 fog light assembly RH connector.


d.

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

Standard Resistance:
Tester Connection Condition Specified Condition
5 (FR FOG relay) - B5-2 (B) Always Below 1 Ω
5 (FR FOG relay) - B6-2 (B) Always Below 1 Ω
5 (FR FOG relay) or B5-2 (B) - Body ground Always 10 kΩ or higher
5 (FR FOG relay) or B6-2 (B) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (FR FOG RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (FR FOG RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
a.

Remove the FR FOG relay.


b.

Disconnect the 3C instrument panel junction block assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
2 (FR FOG relay) - 3C-25 Always Below 1 Ω
2 (FR FOG relay) or 3C-25 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

7.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
E421947C02
5.042,0.521 5.396,0.76 0.354,0.24 1.531,0.281 1.885,0.521 0.354,0.24 4.24,1.073 4.708,1.51 true 5.208,0.573 5.365,0.771 0.156,0.198 10 false A 1.625,0.323 1.844,0.542 0.219,0.219 10 false 3C 0.25,0.135 0.469,0.354 0.219,0.219 10 false *a 4.76,1.448 5.333,1.688 0.573,0.24 10 false FFGO
*a Component without harness connected
(Instrument Panel Junction Block Assembly) 		- -


a.

Remove the instrument panel junction block assembly.

for LHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL

for RHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL


b.

Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

for LHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL

for RHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3C-25 - A-7 (FFGO) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

for LHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL

for RHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL


NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

for LHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL

for RHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL


8.CHECK HARNESS AND CONNECTOR (FR FOG RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
a.

Remove the FR FOG relay.


b.

Disconnect the 3C instrument panel junction block assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
1 (FR FOG relay) - 3C-32 Always Below 1 Ω
1 (FR FOG relay) or 3C-32 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

for LHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL

for RHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR