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Bleeding Brake System

NOTE: Use only DOT 3 brake fluid from a sealed container. DO NOT  use DOT 5 silicone brake fluid.
  1. Ensure ignition is off. Clean master cylinder reservoir cover and surrounding area. Ensure reservoir is full. Bleeding sequence is master cylinder, Hydraulic Control Unit (HCU) valve body (at fluid lines), right rear wheel, left rear wheel, right front wheel and left front wheel.
  2. After bleeding master cylinder, position shop towel below 4 hydraulic control unit brake pipes. Using flare wrench, slightly open hydraulic control unit brake pipe fittings individually.
  3. DO NOT  allow brake fluid to contact paint or electrical connectors. Slowly depress brake pedal. Close hydraulic control unit brake pipe fitting and release brake pedal. Repeat process until no air escapes from brake pipe fitting. Repeat procedure for remaining 3 brake lines.
  4. Ensure master cylinder reservoir is full. Raise and support vehicle. Bleed all 4 wheel calipers. Attach a clear hose to right rear caliper bleeder valve and submerge other end of hose in container of brake fluid.
    NOTE: DO NOT  pump brake pedal while bleeding brakes. Pumping brake pedal compresses air into tiny bubbles throughout system making bleeding more difficult.
  5. Open bleeder valve. Slowly depress brake pedal. Close bleeder valve and release brake pedal. Wait 5 seconds. Repeat process until no air bubbles are seen from hose. Tap lightly on cylinder/caliper housing to free trapped air. Close bleeder valve. Repeat process until no air bubbles are seen from hose. Repeat procedure on left rear, right front and left front bleeder valves. Ensure reservoir is full.
  6. Using DRB-II, follow prompts and perform BLEED BRAKES procedure. After performing BLEED BRAKES procedure using DRB-II, repeat steps 1)-5). Ensure master cylinder reservoir is full.
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