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Removal - ICU

NOTE: Before proceeding, refer to CAUTION  .
  1. Using a brake pedal holder, depress the brake pedal past its first one inch of travel and hold it in this position. (Fig 1 ). This will isolate the master cylinder from the brake hydraulic system and will not allow the brake fluid to drain out of the master cylinder reservoir.
    Fig 1: Using Brake Pedal Holder
    G01031864Courtesy of DAIMLERCHRYSLER CORP.
  2. Disconnect negative (ground) cable from the battery and isolate the cable.
  3. Disconnect the positive cable from the battery, then remove the battery from the battery tray. There is one nut securing the clamp on the backside of the battery holding it in place.
  4. Remove the one nut and one bolt securing the air cleaner box in place, then disconnect the wiring harness connector at the air inlet sensor.
  5. Lift the air cleaner box upward enough to clear its grommeted alignment post, then move the air cleaner box forward just enough to access the battery tray mounting bolts. (Fig 2 ).
    Fig 2: Removing/Installing Battery Tray Mounting
    G01031865Courtesy of DAIMLERCHRYSLER CORP.
  6. Remove the 2 bolts, then the 2 nuts mounting the battery tray to its bracket. (Fig 2 ). Remove the battery tray.
  7. Disconnect the primary and secondary brake tubes from the master cylinder. (Fig 3 ). Install plugs in the master cylinder outlet ports.
    Fig 3: Identifying Brake Tube Locations
    G01031866Courtesy of DAIMLERCHRYSLER CORP.
  8. Disconnect the 24-way connector from the controller anti-lock brake (CAB) mounted on the integrated control unit (ICU) and move it out of the way. The connector is disconnected by pulling outward on the connector lock. (Fig 4 ). This will unlock and raise the 24-way connector out of the socket on the CAB.
    Fig 4: Identifying Connector Lock Pulled Outward
    G01031867Courtesy of DAIMLERCHRYSLER CORP.
  9. Tag the brake tubes coming from the master cylinder as primary and secondary. (Fig 3 ). This is done to avoid mix-up once the tubes are removed from the vehicle.
  10. Disconnect and remove the primary and secondary brake tubes coming from the master cylinder at the ICU hydraulic control unit (HCU). (Fig 3 ).
  11. Disconnect the brake tubes going to each individual brake at the HCU. (Fig 3 ).
  12. Remove the 3 bolts attaching the ICU to its mounting bracket. (Fig 5 ).
    Fig 5: Removing/Installing ICU Mounting Bolts
    G01031868Courtesy of DAIMLERCHRYSLER CORP.
  13. Remove the ICU from the vehicle.
  14. If the CAB and HCU must be separated, (Refer to DISASSEMBLY - ICU  ).
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