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Home >> Acura >> 2009 >> CSX Base, Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission >> Automatic Transmission >> Pressure Test

Pressure Test

Special Tools Required 

  1. Make sure the transmission fluid is filled to the proper level (see ATF LEVEL CHECK  ).
  2. Raise the vehicle on a lift, or apply the parking brake, block rear wheels, and raise the front of the vehicle. Make sure it is securely supported.
  3. Remove the splash shield.
  4. Allow the front wheels to rotate freely.
  5. Connect the oil pressure gauge to the line pressure inspection port (A). Do not allow dust or other foreign particles to enter the ports while connecting the gauges.
    Fig 1: Identifying Line Pressure Inspection Port
    G06265016Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on).
  7. Turn off the engine, and connect the HDS to the DLC (A).
    NOTE: If the HDS does not communicate with the PCM, troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ).
    Fig 2: Identifying Data Link Connector
    G06265017Courtesy of AMERICAN HONDA MOTOR CO., INC.
  8. Measure the line pressure at the line pressure inspection port in the P or N position while holding the engine speed at 2,000 rpm.
    NOTE: Higher pressure may be indicated if measurements are made in shift lever position other than P or N.
    FLUID PRESSURE REFERENCE CHART

    Pressure Fluid Pressure
    Standard Service Limit
    Line 900-960 kPa (9.2-9.8 kgf/cm2 , 130-140 psi) 850 kPa (8.7 kgf/cm2 , 120 psi)
  9. Turn the engine off, then disconnect the oil pressure gauge from the line pressure inspection port.
  10. Install the sealing bolt to the line pressure inspection port with the new sealing washer, and tighten the bolt to 18 N.m (1.8 kgf.m, 13 lbf.ft). Do not reuse the old sealing washer.
  11. Connect the oil pressure gauge to the 1st clutch pressure inspection port (B).
    Fig 3: Identifying 1st Clutch Pressure Inspection Port
    G06265018Courtesy of AMERICAN HONDA MOTOR CO., INC.
  12. Remove the air intake duct (see THROTTLE BODY REMOVAL/INSTALLATION ) and air cleaner assembly (see AIR CLEANER REMOVAL/INSTALLATION ).
  13. Remove the harness cover from its bracket, and connect the oil pressure gauge to the 2nd clutch pressure inspection port (C). Then temporarily install the air cleaner assembly and air intake duct.
    Fig 4: Identifying 2nd Clutch Pressure Inspection Port
    G06265019Courtesy of AMERICAN HONDA MOTOR CO., INC.
  14. Start the engine, and shift to the S position.
  15. Shift to 1st gear, and measure the 1st clutch pressure at the 1st clutch pressure inspection port (B) while holding the engine speed at 2,000 rpm.
  16. Shift up to 2nd gear by pressing the steering wheel upshift (+) switch, and measure the 2nd clutch pressure at the 2nd clutch pressure inspection port (C) while holding the engine speed at 2,000 rpm.
    FLUID PRESSURE REFERENCE CHART

    Pressure Fluid Pressure
    Standard Service Limit
    1st clutch (B)
    2nd clutch (C)    		 890-970 kPa (9.1-9.9 kgf/cm2 , 130-140 psi) 840 kPa (8.6 kgf/cm2 , 120 psi)
  17. Turn the engine off, remove the air cleaner assembly (see AIR CLEANER REMOVAL/INSTALLATION ) and air intake duct (see THROTTLE BODY REMOVAL/INSTALLATION ), then disconnect the oil pressure gauges from the 1st clutch pressure and 2nd clutch pressure inspection ports.
  18. Install the sealing bolts to the 1st clutch pressure and 2nd clutch pressure inspection ports with the new sealing washers, and tighten the bolts to 18 N.m (1.8 kgf.m, 13 lbf.ft). Do not reuse old sealing washer.
  19. Install the air cleaner assembly (see AIR CLEANER REMOVAL/INSTALLATION ) and air intake duct (see THROTTLE BODY REMOVAL/INSTALLATION ).
  20. Connect the oil pressure gauge to the 3rd clutch pressure inspection port (D) and the 5th clutch pressure inspection port (F).
    Fig 5: Identifying 3rd And 5th Clutch Pressure Inspection Port
    G06265020Courtesy of AMERICAN HONDA MOTOR CO., INC.
  21. Connect the oil pressure gauge to the 4th clutch pressure inspection port (E).
    Fig 6: Identifying 4th Clutch Pressure Inspection Port
    G06265021Courtesy of AMERICAN HONDA MOTOR CO., INC.
  22. Start the engine, and shift to the S position.
  23. Shift up to 3rd gear by pressing the steering wheel upshift (+) switch, and measure the 3rd clutch pressure at the 3rd clutch pressure inspection port (D) while holding the engine speed at 2,000 rpm.
  24. Shift up to 4th gear, and measure the 4th clutch pressure at the 4th clutch pressure inspection port (E) while holding the engine speed at 2,000 rpm.
  25. Shift up to 5th gear, and measure the 5th clutch pressure at the 5th clutch pressure inspection port (F) while holding the engine speed at 2,000 rpm.
    FLUID PRESSURE REFERENCE CHART

    Pressure Fluid Pressure
    Standard Service Limit
    3rd clutch (D)
    4th clutch (E)
    5th clutch (F)    		 890-970 kPa (9.1-9.9 kgf/cm2 , 130-140 psi) 840 kPa (8.6 kgf/cm2 , 120 psi)
  26. Bring the engine back to an idle, then apply the brake pedal to stop the wheels from rotating.
  27. Shift to the R position, then release the brake pedal. Raise the engine speed to 2,000 rpm, and measure the 4th clutch pressure at the 4th clutch pressure inspection port (E).
    FLUID PRESSURE REFERENCE CHART

    Pressure Fluid Pressure
    Standard Service Limit
    4th clutch (E) in R 890-970 kPa (9.1-9.9 kgf/cm2 , 130-140 psi) 840 kPa (8.6 kgf/cm2 , 120 psi)
  28. Turn the engine off, then disconnect the oil pressure gauges from the 3rd, 4th, and 5th clutch pressure inspection ports.
  29. Install the sealing bolts in the 3rd, 4th, and 5th clutch pressure inspection ports with the new sealing washers, and tighten the bolts to 18 N.m (1.8 kgf.m, 13 lbf.ft). Do not reuse the old sealing washer.
  30. If the measurements are out of the service limit, the problems and probable causes are listed in the table.
    PROBLEM PROBABLE COUSES REFERENCE CHART

    Problem Probable causes
    No or low line pressure
    • Torque converter
    • ATF pump
    • Regulator valve
    • Torque converter check valve
    • Clogged ATF strainer
    No or low 1st clutch pressure
    • 1st clutch
    • O-rings
    No or low 2nd clutch pressure
    • 2nd clutch
    • O-rings
    No or low 3rd clutch pressure
    • 3rd clutch
    • O-rings
    No or low 4th clutch pressure
    • 4th clutch
    • O-rings
    No or low 5th clutch pressure
    • 5th clutch
    • O-rings
    No or low 4th clutch pressure in the R position
    • Servo valve
    • 4th clutch
    • O-rings
  31. Install the splash shield.
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