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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 2022 (Automatic Transmission) >> A/T Fluid >> 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 2007 Nissan Pathfinder. 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: Identifying Fluid Cooler Inlet And Outlet Rubber Hoses
    G04875799
  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: Identifying Extension Adapter Hose Of A Can Of Transmission Cooler Cleaner
    G04875802
  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: Attaching Coffee Filter
    G04875803
  8. Insert the tip of an air gun into the end of the cooler outlet hose.
    Fig 4: Inserting Tip Of An Air Gun Into End Of Cooler Outlet Hose
    G04875804
  9. Wrap a shop rag around the air gun tip and end of cooler outlet hose.
  10. Blow compressed air regulated to 5 - 9 kg/cm2 (70 - 130 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 INSPECTION PROCEDURE ".
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