Hydraulic Test [11/2016 - ]

WARNING: This page is about a different car, the 2019 Toyota Highlander, 2018 Toyota Highlander, and 2017 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM HYDRAULIC TEST

Measure the line pressure.

WARNING:

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

NOTE:

Perform this test with the ATF (Automatic Transaxle Fluid) at the normal operating temperature: 50 to 80°C (122 to 176°F)
Be careful to prevent the SST hose from contacting the exhaust pipe.
This check must be conducted after checking and confirming that the engine is normal.
Perform this test with the air conditioning off.
Do not perform the stall test for longer than 5 seconds.
When performing the stall speed test repeatedly, wait for 15 seconds or more between tests.
The installation position of SST is different for the D position and R position line pressure tests.

Warm up the ATF.
Lift the vehicle.
Remove the engine under cover.

Remove the test plug A on the front side of the transaxle case and install SST.

SST: 09993-19015
- 09993-00010, 09993-00040

Fig 1: Hydraulic Test

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Test Plug A

Lower the vehicle.
Fully apply the parking brake and chock all 4 wheels.
Start the engine and check the idle speed.
Keep your left foot firmly on the brake pedal and move the shift lever to D.

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.

Specified Line Pressure

Condition	D Position
Stall test	1300 to 1600 kPa (13.3 to 16.3 kgf/cm² , 189 to 232 psi)

Turn the ignition switch off.
Remove SST and install the test plug A.

Remove the test plug B on the left side of the transaxle case and install SST.

SST: 09993-19015
- 09993-00010, 09993-00040

Fig 2: Hydraulic Test

*a	Test Plug B

Start the engine and check the idle speed.
Keep your left foot firmly on the brake pedal and move the shift lever to R.

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.

Specified Line Pressure

Condition	R Position
Stall test	1700 to 2100 kPa (17.3 to 21.4 kgf/cm² , 247 to 305 psi)

Turn the ignition switch off.
Remove SST and install the test plug B.

Clear the DTCs.

Refer to DTC CHECK / CLEAR [11/2016 - ]

EVALUATION

Problem	Possible Cause
Measured values at all positions are higher than specified	Solenoid (SLT) valve defective Regulator valve defective
Measured values at all positions are lower than specified	Solenoid (SLT) valve defective Regulator valve defective Oil pump defective
Pressure is low when shift lever is in D only	D position circuit fluid leak No. 1 clutch (C1) defective No. 2 brake (B2) defective
Pressure is low when shift lever is in R only	R position circuit fluid leak No. 3 clutch (C3) defective No. 2 brake (B2) defective