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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 180 (Battery, Charging System And Starting System) >> Repair Instructions >> Multifunction Energy Storage Capacitor Replacement (KL9) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
    WARNING:

    Ultracapacitors should not be opened, disassembled, crushed, burned, charged over 5V, or exposed to high temperatures greater than 81.6°C (179°F). Ultracapacitors contain acetonitrile. If ultracapacitor leaks or ruptures it will emit flammable liquid and vapor with an aromatic ether-like odor. Harmful if inhaled or absorbed through the skin. Causes respiratory tract, eye, and skin irritation. May be harmful if swallowed. Can cause target organ damage. Arcing may also occur when charged and shorted, resulting in molten metal splattering and arc-flash hazards. To reduce the risk of personal injury and/or vehicle damage:

    • Do not breath vapor or mist, assure adequate ventilation of area.
    • Do not ingest.
    • Do not eat, drink or smoke when using this product.
    • Avoid contact with eyes, skin and clothing. In case of exposure to ultracapacitor contents, wash affected area for at least 15 minutes with generous amounts of water and seek medical attention.
    • Keep away from heat sparks and flame.
    • Remove jewelry before handling.
    • Follow diagnostic and repair procedures to discharge the ultracapacitor and disconnect the negative battery terminal when requested.
  1. Command the Discharge Start/Stop Capacitor parameter with the scan tool and discharge the multifunction energy storage capacitor. Wait 3 minutes for the capacitor to discharge.
  2. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection 
  3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (ATS)Lifting and Jacking the Vehicle (ATS-V)
  4. Remove Rear Bumper Fascia. Refer to Rear Bumper Fascia Replacement
  5. Fig 1: Inserting Small Screwdriver Into Small Rectangular Holes
    GM4114406Courtesy of GENERAL MOTORS COMPANY
  6. Insert a small screwdriver (1) into the small rectangular holes (2) on top of the protective cap and spread tabs outwards to release the protective cap.
  7. Fig 2: Ground Cable Nut
    GM4088505Courtesy of GENERAL MOTORS COMPANY
  8. Remove Ground Cable Nut (4)
  9. Remove Ground Cable (5)
  10. Remove Protective Cap (1)
  11. Remove Auxiliary Generator Battery Jumper Cable Fastener (2)
  12. Remove Auxiliary Generator Battery Jumper Cable (3)
  13. Fig 3: Multifunction Energy Storage Capacitor
    GM4088508Courtesy of GENERAL MOTORS COMPANY
  14. Disconnect Electrical Connector (2)
  15. Remove Multifunction Energy Storage Capacitor Fastener (1) (Qty: 2)
  16. Remove Multifunction Energy Storage Capacitor (3)
  17. Lower the vehicle.