Diesel Data: Automotive Repair

Hydraulic Test








U340E AUTOMATIC TRANSAXLE: AUTOMATIC TRANSAXLE SYSTEM: HYDRAULIC TEST

HYDRAULIC TEST

1. PERFORM HYDRAULIC TEST





(a) Measure the line pressure.
NOTICE:
- Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature 50° to 80°C (122° to 176°F).
- The line pressure test must always be carried out by pairs of technicians. One technician must observe the condition of the wheels and wheel stoppers outside the vehicle, while the other is performing the test.
- Prevent the SST hose from interfering with the exhaust pipe.
- This test must be conducted after checking and adjusting the engine.
- Perform this test with the air conditioning OFF.
- Do not continue the stall test for more than 5 seconds.
(1) Warm up the ATF.
(2) Lift the vehicle up.
(3) Remove the engine under cover.
(4) Remove the test plug on the transmission case center right side and connect SST.
SST: 09992-00095
09992-00231
09992-00271
(5) Connect the Techstream to the DLC3.
(6) Turn the ignition switch to ON.
(7) Turn the Techstream on.
(8) Enter the following menus: Powertrain / Engine and ECT / Data List / All Data.
(9) Fully apply the parking brake and chock all 4 wheels.
(10) Start the engine and check the idling speed.
(11) Keep your left foot pressing firmly on the brake pedal and shift into the D position.
(12) Measure the line pressure when the engine is idling.
(13) Depress the accelerator pedal all the way down. Quickly read the highest line pressure when engine speed reaches stall speed.
(14) Perform the test in the R position in the same manner.
Standard line pressure: