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

LIGHTING (EXT)  LIGHTING SYSTEM  Front Fog Light Circuit  


DESCRIPTION

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

WIRING DIAGRAM

E445363E25
2.125,0.542 3.813,0.74 1.688,0.198 10 false from Auxiliary Battery 0.771,0.698 2.458,0.896 1.688,0.198 10 false FOG FR 4.354,2 6.042,2.198 1.688,0.198 10 false FOG FR RLY-S 4.396,3.521 5.802,3.958 1.406,0.438 10 false Power Distribution Box Assembly 0.833,3.073 1.406,3.313 0.573,0.24 10 false B7 1.094,3.073 2.781,3.271 1.688,0.198 10 false Fog Light LED LH 0.833,4.292 2.521,4.49 1.688,0.198 10 false B6 1.104,4.292 2.792,4.49 1.688,0.198 10 false Fog Light LED RH 1.01,2.354 1.51,2.563 0.5,0.208 10 false 1 1.219,2.354 1.719,2.563 0.5,0.208 10 false E 2.052,2.354 2.552,2.563 0.5,0.208 10 false B 2.281,2.344 2.781,2.552 0.5,0.208 10 false 2 1.417,2.656 3.104,2.854 1.688,0.198 10 false Fog Light 1.021,1.24 1.521,1.448 0.5,0.208 10 false 2 1.031,1.51 1.531,1.719 0.5,0.208 10 false 5 2.271,1.229 2.771,1.438 0.5,0.208 10 false 1 2.271,1.5 2.771,1.708 0.5,0.208 10 false 3 3.667,1.125 4.167,1.333 0.5,0.208 10 false 28 3.677,1.333 4.177,1.542 0.5,0.208 10 false 4E 5.979,1.698 6.479,1.906 0.5,0.208 10 false 22 5.427,4.99 7.083,5.5 1.656,0.51 10 false Main Body ECU (Multiplex Network Body ECU) 1.438,3.854 3.125,4.052 1.688,0.198 10 false Fog Light 2.063,3.542 2.563,3.75 0.5,0.208 10 false B 1.208,3.542 1.708,3.75 0.5,0.208 10 false E 1.01,3.542 1.51,3.75 0.5,0.208 10 false 1 2.271,3.542 2.771,3.75 0.5,0.208 10 false 2 1.479,1.885 3.167,2.083 1.688,0.198 10 false FOG FR 6.25,1.885 6.75,2.094 0.5,0.208 10 false CXP1 5.604,1.917 6.104,2.125 0.5,0.208 10 false IC 3.667,2.01 4.167,2.219 0.5,0.208 10 false 44 3.667,2.219 4.167,2.427 0.5,0.208 10 false 4B 3.677,2.906 4.177,3.115 0.5,0.208 10 false 25 3.667,3.125 4.167,3.333 0.5,0.208 10 false 4C 0.896,5.417 3.521,5.646 2.625,0.229 10 false : CXPI Communication Line 5.406,4.813 5.906,5.021 0.5,0.208 10 false MB

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.

·

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
Front Fog Light External Relay Input Signal Front fog light external relay input OFF or ON OFF: Front fog lights off
ON: Front fog lights on 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Front Fog Light External Relay Input Signal
50003 475 1320
OK:

Display changes according to the front fog light switch operation.



Result:
Proceed to
OK
NG



OK

2.READ VALUE USING GTS

NG

7.CHECK HARNESS AND CONNECTOR (POWER SOURCE - FOG FR RELAY)
2.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
Front Fog Light External Relay Output Signal Front fog light external relay output OFF or ON OFF: Front fog lights off
ON: Front fog lights on 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Front Fog Light External Relay Output Signal
50003 475 1321
OK:

Display changes according to the front fog light switch operation.



Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - BODY GROUND)

NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

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


3.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - BODY GROUND)
a.

Disconnect the 4B and 4C power distribution box assembly connectors.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
4B-44 - Body ground Always Below 1 Ω
4C-25 - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

4.INSPECT FOG FR RELAY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.INSPECT FOG FR RELAY

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

Result:
Proceed to
OK
NG



OK

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

NG

REPLACE FOG FR RELAY

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

Disconnect the B7 fog light LED LH connector.


b.

Disconnect the B6 fog light LED RH connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(B7,B6)Location & Routing

Click Connector(B7)Engine Compartment>No. 4 Engine Room Wire / No. 2 Engine Wire / No. 3 Engine Wire / No. 5 Engine Wire / No. 6 Engine Wire / Sensor Wire>Fog Light Assembly LH

Click Connector(B6)Engine Compartment>No. 4 Engine Room Wire / No. 2 Engine Wire / No. 3 Engine Wire / No. 5 Engine Wire / No. 6 Engine Wire / Sensor Wire>Fog Light Assembly RH

3 (FOG FR relay) - B7-2 (B) Always Below 1 Ω
3 (FOG FR relay) - B6-2 (B) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (FOG LIGHT LED - BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (FOG LIGHT LED - BODY GROUND)
a.

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(B7,B6)Location & Routing

Click Connector(B7)Engine Compartment>No. 4 Engine Room Wire / No. 2 Engine Wire / No. 3 Engine Wire / No. 5 Engine Wire / No. 6 Engine Wire / Sensor Wire>Fog Light Assembly LH

Click Connector(B6)Engine Compartment>No. 4 Engine Room Wire / No. 2 Engine Wire / No. 3 Engine Wire / No. 5 Engine Wire / No. 6 Engine Wire / Sensor Wire>Fog Light Assembly RH

B7-1 (E) - Body ground Always Below 1 Ω
B6-1 (E) - 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

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

Remove the FOG FR relay.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
2 (FOG FR relay) - Body ground Ignition switch off*1
Always*2 		11 to 14 V
5 (FOG FR relay) - Body ground Ignition switch off*1
Always*2 		11 to 14 V


*1: for HV Model

*2: for Gasoline Model



Result:
Proceed to
OK
NG



OK

8.INSPECT FOG FR RELAY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.INSPECT FOG FR RELAY

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

Result:
Proceed to
OK
NG



OK

9.CHECK HARNESS AND CONNECTOR (FOG FR RELAY - POWER DISTRIBUTION BOX ASSEMBLY)

NG

REPLACE FOG FR RELAY

9.CHECK HARNESS AND CONNECTOR (FOG FR RELAY - POWER DISTRIBUTION BOX ASSEMBLY)
a.

Disconnect the 4E power distribution box assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
1 (FOG FR relay) - 4E-28 Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

10.CHECK HARNESS AND CONNECTOR (FOG FR RELAY - FOG LIGHT LED)

NG

REPAIR OR REPLACE FOG FR RELAY

10.CHECK HARNESS AND CONNECTOR (FOG FR RELAY - FOG LIGHT LED)
a.

Disconnect the B7 fog light LED LH connector.


b.

Disconnect the B6 fog light LED RH connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(B7,B6)Location & Routing

Click Connector(B7)Engine Compartment>No. 4 Engine Room Wire / No. 2 Engine Wire / No. 3 Engine Wire / No. 5 Engine Wire / No. 6 Engine Wire / Sensor Wire>Fog Light Assembly LH

Click Connector(B6)Engine Compartment>No. 4 Engine Room Wire / No. 2 Engine Wire / No. 3 Engine Wire / No. 5 Engine Wire / No. 6 Engine Wire / Sensor Wire>Fog Light Assembly RH

3 (FOG FR relay), B7-2 (B) or B6-2 (B) - Body ground Always 10 kΩ or higher



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