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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 888 (Automatic Transmission) >> Periodic Maintenance >> A/T Fluid Cooler >> A/T Fluid Cooler Cleaning >> A/T Fluid Cooler Diagnosis Procedure

A/T Fluid Cooler Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Insufficient cleaning of the cooler inlet hose exterior may lead to inaccurate debris identification.
  1. Position a drain pan under the A/T inlet and outlet fluid cooler tube to cooler hose connection.
  2. Clean the exterior and tip of the cooler inlet hose.
  3. Put a different color matching mark on each cooler tube to cooler hose connection to aid in assembly.
    CAUTION: Use paint to make the matching mark. Do not damage the tubes or hose.
  4. Disconnect the fluid cooler inlet and outlet rubber hoses from the steel cooler tubes.
    NOTE: Replace the cooler hoses if rubber material from the hose remains on the tube fitting.
    Fig 1: Draining A/T Fluid From Cooler Hose
    G04875799Courtesy of NISSAN NORTH AMERICA, INC.
  5. Insert the extension adapter hose of a can of Transmission Cooler Cleaner (Nissan P/N 999MP-AM006) into the cooler outlet hose.
    CAUTION:
    • Wear safety glasses and rubber gloves when spraying the Transmission Cooler Cleaner.
    • Spray cooler cleaner only with adequate ventilation.
    • Avoid contact with eyes and skin.
    • Do not breath vapors or spray mist.
      Fig 2: Inserting Extension Adapter Hose Of Can Of Transmission Cooler Cleaner Into Cooler Outlet Hose
      G04875802Courtesy of NISSAN NORTH AMERICA, INC.
  6. Hold the hose and can as high as possible and spray Transmission Cooler Cleaner in a continuous stream into the cooler outlet hose until fluid flows out of the cooler inlet hose for 5 seconds.
  7. Tie a common white, basket-type coffee filter to the end of the cooler inlet hose.
    Fig 3: Identifying Coffee Filter Attached To Cooler Inlet Hose
    G04875803Courtesy of NISSAN NORTH AMERICA, INC.
  8. Insert the tip of an air gun into the end of the cooler outlet hose.
  9. Wrap a shop rag around the air gun tip and end of cooler outlet hose.
  10. Blow compressed air regulated to 490 - 883 kPa (5 - 9 kg/cm2 , 71 - 128 psi) through the cooler outlet hose to force any remaining A/T fluid into the coffee filter.
  11. Remove the coffee filter from the end of the cooler inlet hose.
  12. Perform A/T fluid cooler inspection. Refer to "A/T FLUID COOLER CLEANING ".
    Fig 4: Blowing Compressed Air Into Cooler Outlet Hose
    G04875804Courtesy of NISSAN NORTH AMERICA, INC.
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