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HOMESERVICE MANUALSSUBARU2016LEGACY 2.5IREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLVEHICLE DYNAMICS CONTROL (VDC) SYSTEM (DIAGNOSTICS)WARNING LIGHT ILLUMINATION PATTERNBRAKE WARNING LIGHT DOES NOT GO OFFWIRING DIAGRAM
2016 Subaru Legacy 2.5i

Brake Warning Light Does Not Go Off: Wiring Diagram

2016 Subaru Legacy 2.5iSECTION Wiring Diagram
NOTE: For the coupling connector, refer to "WIRING SYSTEM".

Parking brake/brake fluid level warning light system < Ref. to appropriate wiring diagram in SYSTEM WIRING DIAGRAM article. >

Fig 1: Brake Warning Light - Wiring Diagram
G10311118Courtesy of SUBARU OF AMERICA, INC.
DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK INSTALLATION OF VDCCM & H/U CONNECTOR. 
  1. Turn the ignition switch to OFF.
  2. Check that the VDCCM & H/U connector is inserted until it is locked by clamp.
 Is the connector firmly inserted? Go to step 2  . Insert the VDCCM & H/U connector until it is locked by clamp.
2 READ DTC. 
Read the DTC. < Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) . >		 Is DTC displayed? Perform the diagnosis according to DTC. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . > Go to step 3  .
3 CHECK BRAKE FLUID AMOUNT. 
Check the amount of brake fluid in the reservoir tank of master cylinder.		 Does the level of the brake fluid amount fall between the lines of "MAX" and "MIN"? Go to step 4  . Replenish brake fluid to the specified value.
4 CHECK BRAKE FLUID LEVEL SWITCH. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the level switch connector (B16) from master cylinder.
  3. Measure the resistance of master cylinder terminals.

    Terminals 

    No. 1 - No. 2: 

 Is the resistance 1 MΩ or more? Go to step 5  . Replace the master cylinder. < Ref. to MASTER CYLINDER . >
5 CHECK GROUND SHORT OF HARNESS. 
  1. Disconnect the connector from the combination meter.
  2. Measure the resistance between combination meter connector and chassis ground.

    Connector & terminal 

    (i10) No. 23 - Chassis ground: 

 Is the resistance 1 MΩ or more? Go to step 6  . Repair the harness connector between combination meter and brake fluid level switch.
6 CHECK LAN SYSTEM. 
Perform the diagnosis for LAN system. < Ref. to BASIC DIAGNOSTIC PROCEDURE . >		 Is there any fault in LAN system? Perform the diagnosis according to DTC for LAN system. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . > Go to step 7  .
7 CHECK COMBINATION METER. 
Check the combination meter. < Ref. to SELF-DIAGNOSIS DISPLAY MODE , OPERATION, Combination Meter System. >		 Is combination meter OK? Replace the VDCCM & H/U. < Ref. to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM & H/U) . > Replace the combination meter. < Ref. to COMBINATION METER . >
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.