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Controller Antilock Brakes

CAUTION: When removing ABM from HCU, be sure to completely separate the two components (approximately 38 mm (1.5 in.) before removing ABM. Otherwise, damage to the pressure sensor or Pump Motor connection may result requiring HCU replacement. Do not to touch the sensor terminals on the HCU side or the contact pads on the ABM side as this may result in contamination and issues in the future.
  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 & Components
    GC0044655Courtesy of CHRYSLER LLC
  4. Disconnect the HCU electrical connectors (5).
  5. Remove the primary brake line at the master cylinder.
  6. Remove the primary brake line from the HCU (4).
  7. Remove the secondary brake line at the master cylinder.
  8. Remove the secondary brake line at the HCU (4)
  9. Remove the 4 chassis lines (3) at the HCU (4).
    Fig 2: Identifying ABM/HCU Components
    GC0044738Courtesy of CHRYSLER LLC
  10. Remove the 1 mounting nut and 1 bolt holding the HCU bracket attachment to the vehicle.
  11. Remove the HCU (3) with the bracket (5) from the vehicle.
    Fig 3: Antilock Brake Module & Hydraulic Control Unit
    GC0026855Courtesy of CHRYSLER LLC
    1 - ABM
    2 - HCU
  12. Remove the 3 ABM bolts securing the ABM (1) to the HCU (2).
    Fig 4: Identifying Antilock Brake Module & Hydraulic Control Unit
    GC0045386Courtesy of CHRYSLER LLC
  13. Separate the ABM (1) from the HCU (2).
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