Automatic Transmission/Transaxle: Testing and Inspection

HYDRAULIC PRESSURE TEST





1. Warm the engine until the ATF temperature is 70 - 80°C (158 - 176°F).

CAUTION: The fluid temperature should also be 70 - 80°C (158 - 176°F) when the test is carried out.





2. Stop the engine, and then install the special tools (3.0 MPa [427 psi] oil pressure gauge [MD998330] and adapters [MD998332 and MD998900]) to the hydraulic pressure discharge ports.

NOTE:
^ 2ND: Second brake pressure port
^ UD: Underdrive clutch pressure port
^ LR: Low-reverse brake pressure port
^ DA: Torque converter apply pressure port
(The hydraulic pressure at the DA port is about the same as at the DR port, so measurement at the DR port is not necessary.)
^ DR: Torque converter release pressure port
^ RV: Reverse clutch pressure port
^ OD: Overdrive clutch pressure port





3. Jack up the vehicle so that the tires can rotate freely.
4. Re-start the engine.
5. Check that no ATF leaks out from the ports where the special tools are installed.
6. Measure the hydraulic pressures 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.
7. If any of the pressures are outside the standard value ranges, remedy the problem according to the details in the hydraulic pressure test diagnosis table.
8. Replace the O-rings, which are attached to the hydraulic port plugs with new O-rings.
9. Remove the special tools and install the plugs to the hydraulic ports.
10. After installing the plugs, start the engine and check that no ATF leaks out from the plugs.





STANDARD HYDRAULIC PRESSURE TEST











HYDRAULIC PRESSURE TEST DIAGNOSIS TABLE





OIL SEAL LAYOUT