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Hydraulic Control Unit (HCU): Removal

CAUTION: Replacement of nuts and bolts: Various thread-locking devices are used on nuts and bolts throughout the vehicle. These devices restrict the number of times a nut or bolt can be used. See THREAD LOCKING DEVICES for information.
CAUTION: Remove brake fluid spillage immediately from paint work, with clean water.
  1. Disconnect battery ground cable. Refer to BATTERY DISCONNECTION PROCEDURE .
  2. Position vehicle on a four-post lift.
  3. Open engine compartment and fit paint work protection covers to fenders.
    4. NOTE: The following three pictorial procedures must be carried-out to minimize brake fluid loss when disconnecting the brake tubes.
    Fig 1: Opening Left-Hand-Front And Left-Hand-Rear Caliper Bleed Nipples
    G03156578Courtesy of JAGUAR CARS, INC.
  4. Open Left-Hand-Front and Left-Hand-Rear caliper bleed nipples.
    • Connect a bleed tube and container to the calipers.
    • Open bleed nipples.
  5. Depress and hold down the brake pedal to the specified position using the special tool.
    • Position tool (1) between brake pedal and seat frame.
    • Turn the tool wheel (2) until the brake pedal is held 60mm down from its released position.
    Fig 2: Depressing And Holding Down Brake Pedal
    G03156579Courtesy of JAGUAR CARS, INC.
  6. Tighten bleed nipples to:
    • Front caliper bleed nipple 4-6 Nm.
    • Rear caliper bleed nipple 8-11 Nm.
    • Remove bleed tubes and containers.
    Fig 3: Tightening Bleed Nipples
    G03156580Courtesy of JAGUAR CARS, INC.
  7. Disconnect upper electrical connector.
    • Pull plunger upwards.
    • Release connector.
    Fig 4: Disconnecting Upper Electrical Connectors
    G03156581Courtesy of JAGUAR CARS, INC.
  8. Position a absorbent cloth underneath the brake control modulator to collect brake fluid spillage.
    9. CAUTION: Remove brake fluid spillage immediately from paint work, with clean water.
    NOTE: To minimize brake fluid loss, release the brake tubes in the order shown.
    Fig 5: Releasing Brake Tubes
    G03156582Courtesy of JAGUAR CARS, INC.
  9. Release brake tubes.
    • Undo union nuts and release inlet brake tubes. (1)
    • Install plugs to inlet ports and brake tubes.
    • Undo union nuts and release outlet brake tubes. (2)
    • Install plugs to outlet ports and brake tubes.
  10. Remove brake control module from bracket.
    • Remove bolts.
    Fig 6: Removing Brake Control Module From Bracket
    G03156583Courtesy of JAGUAR CARS, INC.
  11. Clean components and mating surfaces.
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