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Home >> Jeep >> 2005 >> Wrangler Rubicon, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 536 (Anti-Lock Brake System (Service Information)) >> HCU (Hydraulic Control Unit) >> Removal

HCU (Hydraulic Control Unit): Removal

WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the negative battery cable from the battery.
  2. Install a brake pedal prop rod.
  3. Siphon the master cylinder.
    Fig 1: HCU Lines
    GC0026856Courtesy of DAIMLERCHRYSLER CORP.
    1 - ABM (ANTILOCK BRAKE MODULE
    2 - CHASSIS LINES
    3 - HYDRAULIC CONTROL UNIT
  4. Remove the primary brake line at the master cylinder.
  5. Remove the primary brake line from the HCU (3).
  6. Remove the secondary brake tube at the master cylinder.
  7. Remove the secondary brake tube at the HCU (3).
  8. Remove the 4 chassis lines (2) at the HCU (3).
    Fig 2: HCU Lines/Connector
    GC0026825Courtesy of DAIMLERCHRYSLER CORP.
    1 - MASTER CYLINDER
    2 - ABM
    3 - CHASSIS LINES
    4 - HCU
    5 - ELECTRICAL CONNECTOR
  9. Disconnect the HCU electrical connectors (5).
    Fig 3: HCU Mounting Bracket
    GC0026857Courtesy of DAIMLERCHRYSLER CORP.
    1 - BRACKET
    2 - HCU
  10. Remove the 3 mounting nuts at the HCU bracket (1).
    Fig 4: HCU/ABM
    GC0026826Courtesy of DAIMLERCHRYSLER CORP.
    1 - HCU
    2 - BRACKET
  11. Remove the HCU (1) with the bracket (2) from the vehicle.
    Fig 5: Antilock Brake Module
    GC0026855Courtesy of DAIMLERCHRYSLER CORP.
    1 - ABM
    2 - HCU
  12. Remove the 3 ABM bolts securing the ABM (1) to the HCU (2).
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