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Home >> GMC >> 2018 >> Acadia SL >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Brakes >> Diagnostic Information And Procedures >> Brake Warning Indicator Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Verify that the brake fluid level is above the minimum level.
    • Go to next step: If above minimum level 
  2. Ignition ON.
  3. Verify the scan tool Brake Fluid Level Sensor parameter is OK.
    • If the parameter is Low 

      Refer to Circuit/System Testing

    • Go to next step: If the parameter is Ok 
  4. Verify the brake warning indicator turns ON and OFF when commanding the Instrument Cluster All Indicators On and Off with a scan tool.
    • If the brake warning indicator does not turn ON and OFF 

      Replace the P16 Instrument Cluster.

    • Go to next step: If the brake warning indicator turns ON and OFF 
  5. All OK.