Hydraulic Test

MEASURE LINE PRESSURE

NOTE:

Perform the test at the normal operating ATF temperature: 50 to 80°C (122 to 176°F).
The line pressure test should always be performed with at least 2 people. One person should observe the condition of the wheels or wheel chocks while the other is performing the test.

Fig 1: Measuring Line Pressure Using Tool
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Be careful to prevent SST's hose from interfering with the exhaust pipe.
This test must be performed 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 10 seconds.

Warm up the ATF.
Remove the test plug on the transaxle case center right side and connect SST.
SST 09992-00095 (09992-00231, 09992-00271)
Fully apply the parking brake and chock the 4 wheels.
Start the engine and check idling speed.
Keep your left foot firmly on the brake pedal and move the shift lever to D.
Measure the line pressure when the engine is idling.
Depress the accelerator pedal as much as possible with your right foot. Quickly read the highest line pressure reading when the engine speed reaches stall speed.

Perform the measure line pressure test again with the shift lever on R.

Specified line pressure:

SPECIFIED LINE PRESSURE

Condition	Shift Lever on D	Shift Lever on R
Idling	372 to 407 kPa (3.8 to 4.2 kgf/cm² , 54 to 60 psi)	541 to 636 kPa (5.5 to 6.5 kgf/cm² , 78 to 92 psi)
Stall	1,107 to 1,225 kPa (11.3 to 12.5 kgf/cm² , 161 to 178 psi)	1,695 to 1,813 kPa (17.3 to 18.5 kgf/cm² , 246 to 263 psi)

Evaluation:

POSSIBLE CAUSE CHART

Problem	Possible Cause
Measured values at all positions are higher than specified	Shift solenoid valve SLT defective Regulator valve defective
Measured values at all positions are lower than specified	Shift solenoid valve SLT defective Regulator valve defective Oil pump defective
Pressure is low when shift lever is on D only	D position circuit fluid leak Forward clutch defective
Pressure is low when shift lever is on R only	R position circuit fluid leak Direct clutch defective 1st and reverse brake defective