HYDRAULIC TEST
1. PERFORM HYDRAULIC TEST
(a) Measure the line pressure.
CAUTION:
The line pressure test should always be carried out in pairs. One technician should observe the conditions of the wheels and wheel stoppers from outside the vehicle while the other is performing the test.
NOTICE:
(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: 09992-00095
09992-00231
09992-00271
(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) Measure the line pressure when the engine is idling.
(10) Fully depress the accelerator pedal with your right foot. Quickly read the highest line pressure when the engine speed reaches stall speed.
(11) In the same manner, perform the test with the shift lever in R.
Specified Line Pressure
Condition |
D Position |
R Position |
---|---|---|
Stall test |
1200 to 1450 kPa (12.2 to 14.8 kgf/cm2, 174 to 210 psi) |
1150 to 1400 kPa (11.7 to 14.3 kgf/cm2, 167 to 203 psi) |
Problem |
Possible Cause |
---|---|
Measured values at all positions are higher than specified pressure |
|
Measured values at all positions are lower than specified pressure |
|
Pressure is low in D only |
|
Pressure is low in R only |
|
Removal
REMOVAL
PROCEDURE
1. PLACE FRONT WHEELS FACING STRAIGHT AHEAD
2. REMOVE FRONT WHEELS
3. REMOVE NO. 1 ENGINE UNDER COVER SUB-ASSEMBLY
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4. REMOVE REAR ENGINE UNDER COVER ASSEMBLY
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5. REMOVE FRONT DIFFERENTIAL CARRIER ASSEMBLY (for ...
General Information
GENERAL INFORMATION
A large number of ECU controlled systems are used in the 4RUNNER. In
general, ECU controlled systems are considered to be very intricate, requiring
a high level of technical knowledge to troubleshoot. However, most problem
...