Front Fog Light Indicator Does Not Illuminate

Trouble causes: 

• CAN communication failure
• Body integrated unit malfunction
• Combination meter malfunction
• Front fog light system circuit malfunction

1. CHECK DTC  .
   1. Turn the ignition switch to ON.
   2. Read the following DTCs using Subaru Select Monitor. Ref. to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) . Ref. to FRONT RELAY CONTROL MODULE (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
      • Body Control
      • Front Relay Control Module

   Are any DTCs displayed? (Current code)

   Yes  : Perform the diagnosis for the displayed DTCs. Ref. to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST . Ref. to FRONT RELAY CONTROL MODULE (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .

   No  : Go to  2.

2. CHECK DTC  .
   1. Start the engine.
   2. Using the Subaru Select Monitor, read all DTCs. Ref. to LAN SYSTEM (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC of U-code displayed? (Current code)

   Yes  : Perform the diagnosis according to the basic diagnostic procedure in LAN SYSTEM (DIAGNOSTICS). Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

   No  : Go to  3.

3. CHECK THE FRONT FOG LIGHT INDICATOR  .

   Using the Subaru Select Monitor, check the following items in the [Active Test] of [Combination Meter]. Ref. to COMBINATION METER (DIAGNOSTICS)>ACTIVE TEST .

   • Front fog light indicator

   Do the indication on Subaru Select Monitor and the front fog light indicator indication match?

   Yes  : Go to  4.

   No  : Replace the combination meter. Ref. to INSTRUMENTATION/DRIVER INFO>COMBINATION METER .

4. CHECK DATA MONITOR FOR BODY INTEGRATED UNIT  .

   Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Body Control]. Ref. to BODY CONTROL (DIAGNOSTICS)>DATA MONITOR .

   • Front Fog Light SW input

   Do the switch operation and data indication match?

   Yes  : Go to  5.

   No  : Check the front fog light system. Ref. to LIGHTING SYSTEM>FRONT FOG LIGHT SYSTEM .

5. CHECK DATA MONITOR OF Front Relay Control Module  .

   Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Front Relay Control Module]. Ref. to FRONT RELAY CONTROL MODULE (DIAGNOSTICS)>DATA MONITOR .

   • F Fog Light Request

   Does the switch operation change the data display?

   Yes  : Replace Front Relay Control Module. Ref. to BODY CONTROL/COMMUNICATION SYSTEM>FRONT RELAY CONTROL MODULE .

   No  : Replace the body integrated unit. Ref. to BODY CONTROL/COMMUNICATION SYSTEM>BODY INTEGRATED UNIT .