DTC C0054 BLS On Malfunction: Wiring Diagram

Fig 1: BLS On Malfunction - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

STOP LIGHT SWITCH DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK STOP LIGHT SWITCH.  Turn the ignition switch to OFF. Disconnect the stop light switch connector. Measure the resistance of stop light switch terminals.	Is the resistance 1 MΩ or more when switch is OFF (when pedal is not depressed)?	Go to step 2.	Replace the stop light switch.
2 INTERVIEWING 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?	System is normal. (DTC may be recorded while brake is applied during driving.)	Go to step 3.
3 CHECK VDCCM & H/U.  Connect all connectors. Clear the memory. Refer to CLEAR MEMORY MODE . Perform the Inspection Mode. Refer to INSPECTION MODE . Read the DTC.	Is the same DTC displayed?	Replace the VDCCM only. Refer to REPLACEMENT , VDC Control Module and Hydraulic Control Unit (VDCCM & H/U).	Go to step 4.
4 CHECK OTHER DTC DETECTION.	Is any other DTC displayed?	Perform the diagnosis according to DTC. Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .	Temporary poor contact occurs.