Hydraulic Pressure Testing
Line Pressure TestThe line pressure test checks oil pump and control valve pressure regulator valve function. It will also detect oil leakage.
Line Pressure Test Procedure:
1. Check the level of the engine coolant, the engine oil, and the automatic transmission fluid.
Replenish if required.
2. Block the wheels and set the parking brake.
3. Remove the pressure detection plug at the left side of the transmission case.
Set J-29770- A pressure gauge and adapter to the pressure detection plug hole.
4. Start the engine and allow it to idle until the engine coolant temperature reaches 70 - 80°C (158 - 176°F).
5. Hold the brake pedal down as far as it will go.
6. Place the selector in the "D" range.
7. Note the pressure gauge reading with the engine idling.
8. Gradually push the accelerator pedal to the floor. The throttle valve will be fully open.
Note the pressure gauge reading with the accelerator pedal fully depressed.
Note: Do not continuously run this test longer than 5 seconds.
9. Release the accelerator pedal.
10. Place the selector in the "N" range.
11. Run the engine at 1,200 rpm for one minute.
This will cool the transmission fluid.
12. Repeat Steps 7-11 for the "3", "2", "L", and "R" ranges.
13. Install a pressure detection plug to the transmission case, applying recommended thread locking agent (LOCTITE 242) or its equivalent to thread of plug. Make sure that thread is cleaned before applying locking agents.
14. Tighten the pressure detection plug to the specified torque.
Torque: 9 - 14 Nm (7 - 10 ft. lbs.)