A750F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: HYDRAULIC TEST; 2006 MY LX470 [05/2005

1. MEASURE LINE PRESSURE

NOTICE:

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.
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.

(a) Warm up the ATF.

(b) Lift the vehicle up.

SST: 09992-00095

09992-00231

09992-00271

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

(e) Start the engine and check idling speed.

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

(g) Measure the line pressure when the engine is idling.

(h) Depress the accelerator pedal as much a possible. Quickly read the highest line pressure reading when the engine speed reaches stall speed.

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

Condition

Shift Lever on D

Shift Lever on R

Idling

361 to 421 kPa

(3.7 to 4.3 kgf/cm ² , 53 to 61 psi)

495 to 576 kPa

(5.0 to 5.9 kgf/cm ² , 71 to 84 psi)

Stall

1,236 to 1,332 kPa

(12.6 to 13.6 kgf/cm ² , 179 to 193 psi)

1,229 to 1,349 kPa

(12.5 to 13.8 kgf/cm ² , 178 to 196 psi)

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 C1 clutch defective
Pressure is low when shift lever is on R only	R position circuit fluid leak C3 clutch defective B4 brake defective