Fog/Driving Lamp: Testing and Inspection

LIGHTING (EXT): LIGHTING SYSTEM: Front Fog Light does not Illuminate

Front Fog Light does not Illuminate

DESCRIPTION

The main body ECU receives a front fog light switch information signal from the light control switch (front fog switch), and illuminates the front fog lights.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (HEADLIGHT DIMMER SWITCH)
(a) Using the Techstream, read the Data List.

Main Body





OK:
When headlight dimmer switch operation is performed, the result will be the same as above.
NG -- INSPECT HEADLIGHT DIMMER SWITCH
OK -- Continue to next step.
2. PERFORM ACTIVE TEST USING TECHSTREAM (FRONT FOG LIGHT RELAY)
(a) Using the Techstream, perform the Active Test.

Main Body





OK:
Fog light turns on/off.
NG -- INSPECT FOG LIGHT RELAY (FR FOG)
OK -- REPLACE MAIN BODY ECU
3. INSPECT HEADLIGHT DIMMER SWITCH




(a) Remove the headlight dimmer switch Component Tests and General Diagnostics.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE HEADLIGHT DIMMER SWITCH
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH - MAIN BODY ECU AND BODY GROUND)




(a) Disconnect the E14 switch connector.
(b) Disconnect the E2 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU
5. INSPECT FOG LIGHT RELAY (FR FOG)




(a) Remove the FR FOG relay from the engine room relay block, junction block.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE FOG LIGHT RELAY (FR FOG)
OK -- Continue to next step.
6. CHECK HARNESS AND CONNECTOR (FR FOG RELAY - BATTERY)




(a) Remove the FR FOG relay from the engine room relay block.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR (FOG LIGHT - FR FOG RELAY AND BODY GROUND)




(a) Remove the FR FOG relay from the engine room relay block.
(b) Disconnect the B1 and B2 light connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:

for LH





for RH





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
8. CHECK FRONT FOG LIGHT




(a) Disconnect the E1 ECU connector.
(b) Using a service wire, connect terminal E1-4 (FFGO) on the wire harness side and the body ground.
(c) Check that the front fog light illuminates.
OK:
Front fog light illuminates.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (FOG LIGHT RELAY - MAIN BODY ECU)
OK -- REPLACE MAIN BODY ECU