Hydraulic Pressure Tests: Notes
WARNING: This page is about a different variant/trim than selected.
CAUTION:
The transmission fluid temperature should be between 70 - 80°C (158 - 176°F) during the test.
- Check the transmission fluid level and temperature. Check engine coolant temperature.
- Transmission fluid level: "HOT" mark on the dipstick
- Transmission fluid temperature: 70 - 80°C (158 - 176°F)
- Engine coolant temperature: 80 - 100°C (176 - 212°F)
- Raise the vehicle so that the wheels are free to turn.
- Connect the special tools (3.0 MPa (427 psi) oil pressure gauge [MD998330] and adapters [MD998332, MD998900, MB992018 <5A/T>]) to each pressure discharge port.NOTE:
- 2ND: Second brake pressure port
- UD: Underdrive clutch pressure port
- LR: Low-reverse brake pressure port
- DR: Torque converter release pressure port
- DA: Torque converter apply pressure port
- RV: Reverse clutch pressure port
- OD: Overdrive clutch pressure port
- DIR: Direct clutch pressure port <5A/T>
- RED: Reduction brake pressure port <5A/T>
- Restart the engine.
- Check that there are no leaks around the special tool port adapters.
- Measure the hydraulic pressure at each port under the conditions given in the standard hydraulic pressure table, and check that the measured values are within the standard value ranges.
- If the pressure is not within the standard value, stop the engine and refer to the HYDRAULIC PRESSURE TEST DIAGNOSIS TABLE .
- Remove the O-ring from the port plug and replace it.
- Remove the special tool, and install the plugs to the hydraulic pressure ports.
- Start the engine and check that there are no leaks around the plugs.