Toyota Tacoma (2015-2018) Service Manual: Hydraulic Test

Toyota Tacoma (2015-2018) Service Manual / Ac60e Automatic Transmission / Transaxle / Automatic Transmission System(for 2gr-fks) / Hydraulic Test

HYDRAULIC TEST

1. PERFORM HYDRAULIC TEST

(a) Measure the line pressure.

CAUTION:

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.

NOTICE:

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 air conditioning off.
When conducting stall test, do not continue for more than 5 seconds.
When performing the stall speed test more than once, make sure to wait 15 seconds or more between tests.

(1) Warm up the ATF (Automatic Transmission Fluid).

(2) Turn the ignition switch off.

(3) Lift the vehicle up.

(4) Remove the test plug from the transmission case and connect SST.

SST: 09993-19015

09993-00010

09993-00040

(5) Lower the vehicle.

(6) Fully apply the parking brake and chock the 4 wheels.

(7) Start the engine and check the idling speed.

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

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

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

Specified Line Pressure

Condition	D Position	R Position
Stall speed	1450 to 1740 kPa (14.8 to 17.7 kgf/cm2, 210 to 252 psi)	1550 to 1840 kPa (15.8 to 18.8 kgf/cm2, 225 to 267 psi)

Condition

D Position

R Position

Stall speed

1450 to 1740 kPa

(14.8 to 17.7 kgf/cm2, 210 to 252 psi)

1550 to 1840 kPa

(15.8 to 18.8 kgf/cm2, 225 to 267 psi)

Evaluation

Problem	Possible Cause
Measured values are higher than the specified value in all positions	Shift solenoid valve SLT defective Regulator valve defective
Measured values are lower than the specified value in all positions	Shift solenoid valve SLT defective Regulator valve defective Oil pump defective
Pressure is low in D position only	D position circuit fluid leak No. 1 clutch (C1) defective
Pressure is low in R position only	R position circuit fluid leak No. 2 brake (B2) defective No. 3 brake (B3) defective

System Diagram

SYSTEM DIAGRAM The configuration of the electronic control system in the AC60E automatic transmission is as shown in the following chart. ...

Mechanical System Tests

MECHANICAL SYSTEM TESTS 1. STALL SPEED TEST HINT: This test is to check the overall performance of the engine and transmission. CAUTION: This test should be done on a paved surface (a sur ...

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