AUTOMATIC TRANSMISSION SYSTEM (for 1UR-FE) - HYDRAULIC TEST

PERFORM HYDRAULIC TEST

Measure the line pressure.

The line pressure test should always be performed with at least 2 people. One person should observe the condition of the wheels and wheel chocks while the other is performing the test.

Perform the test while the ATF (Automatic Transmission Fluid) temperature is between 50 and 80°C (122 and 176°F).

Be careful to prevent the hose of SST from interfering with the exhaust pipe.

This check must be conducted after checking and adjusting the engine.

Perform the test with the A/C off.

When conducting the stall test, do not continue for more than 5 seconds.

Warm up the ATF (Automatic Transmission Fluid).

Turn the engine switch off.

Lift the vehicle up.

Remove the test plug from the transmission case and connect SST.

Lower the vehicle.

Fully apply the parking brake and chock the 4 wheels.

Start the engine and check the idling speed.

Keep your left foot pressed firmly on the brake pedal and move the shift lever to D.

Fully depress the accelerator pedal with your right foot. Quickly read the highest line pressure when the engine speed reaches the stall speed.

In the same manner, perform the test with the shift lever in R.

Specified Line Pressure
Condition	D Position	R Position
Stall speed	1370 to 1530 kPa (14.0 to 15.6 kgf/cm², 199 to 222 psi)	1540 to 1750 kPa (15.7 to 17.8 kgf/cm², 223 to 254 psi)

Evaluation
Problem	Possible Cause
Measured values at both positions are higher than specified pressure	Shift solenoid valve SLT defective Regulator valve defective
Measured values at both positions are below specified pressure	Shift solenoid valve SLT defective Regulator valve defective Oil pump defective
Pressure is low in D position only	D position circuit fluid leak Clutch No. 1 (C1) defective
Pressure is low in R position only	R position circuit fluid leak Clutch No. 3 (C3) defective Brake No. 4 (B4) defective