EXCEPT FOR NON-TURBO MODEL (WITHOUT EyeSight AND X MODE): Wiring Diagram

Stop light system Ref. to WIRING SYSTEM>Stop Light System>WIRING DIAGRAM>EXCEPT FOR MODEL WITHOUT EyeSight AND X MODE .

Fig 1: Turbo Model Stop Light System Wiring Diagram (BLS ON Stuck)

Courtesy of SUBARU OF AMERICA, INC.

1. INTERVIEW CUSTOMERS. 

   Make sure that the operation was performed in which accelerator pedal and brake pedal were depressed simultaneously (with depressing brake pedal with left foot).

   Were the acceleration pedal and brake pedal depressed simultaneously?

   • Yes  : System is normal. (DTC may be recorded if the brake pedal is always depressed while driving.)
   • No  : Go to 2. 
2. CHECK STOP LIGHT RELAY. 
   1. Turn the ignition switch to OFF.
   2. Measure the resistance of stop light relay terminals.

      Terminals 

      No. 17 -No. 18:

   Is the resistance less than 1 Ω?

   • Yes  : Replace the stop light relay.
   • No  : Go to 3. 
3. CHECK VDCCM&H/U CONNECTOR. 

   Disconnect the connector from the VDCCM&H/U.

   Is there poor contact or damage of the VDCCM&H/U connector?

   • Yes  : Repair the VDCCM&H/U connector.
   • No  : Go to 4. 
4. CHECK STOP LIGHT SWITCH CIRCUIT. 
   1. Turn the ignition switch to ON.
   2. Measure the voltage between stop light switch and chassis ground.

      Connector & terminal 

      (B564) No. 18 (+) - Chassis ground (-):

   Is the voltage 10 V or more when the stop light switch is OFF (when pedal is not depressed)?

   • Yes  : Repair the stop light switch circuit.
   • No  : Go to 5. 
5. CHECK VDCCM&H/U. 
   1. Connect all connectors.
   2. Clear the memory. Ref. to BRAKE CONTROL (DIAGNOSTICS)>Clear memory .
   3. Perform the Inspection Mode. Ref. to BRAKE CONTROL (DIAGNOSTICS)>Inspection Mode .
   4. Read the DTC. Ref. to BRAKE CONTROL (DIAGNOSTICS)>Read Diagnostic Trouble Code (DTC) .

   Is the same DTC displayed?

   • Yes  : Replace the VDCCM only. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC Control Module and Hydraulic Control Unit (VDCCM&H/U)>REPLACEMENT .
   • No  : Go to 6. 
6. CHECK DETECTION OF OTHER DTCS FOR VDC. 

   Ref. to BRAKE CONTROL (DIAGNOSTICS)>Read Diagnostic Trouble Code (DTC) .

   Is any other DTC displayed?

   • Yes  : Perform the diagnosis according to DTC. Ref. to BRAKE CONTROL (DIAGNOSTICS)>List of Diagnostic Trouble Code (DTC) .
   • No  : Currently, it is normal. There may have been a temporary poor contact in the harness and connector or a temporary noise interference.