Hydraulic Test [11/2017 - 09/2020]

HINT: 

• Perform the test at the normal operating temperature for ATF (Automatic Transmission Fluid): 50 to 80°C (122 to 176°F).
• A line pressure test should always be carried out with at least 2 people. One technician should observe the conditions of the wheels or wheel chocks outside the vehicle while the other is performing the test.
• Be careful to prevent the SST hose from contacting the exhaust pipe.
• This check must be performed after ensuring that the engine is running properly.
• Perform this test while the A/C is OFF.
• When performing the stall test, do not continue more than 5 seconds.

1. Warm up the ATF (Automatic Transmission Fluid).
2. Lift the vehicle up.
3. Remove the test plug (line pressure) on the transfer case and connect SST.
   • SST: 09992-00095 
     1. 09992-00151
     2. 09992-00271

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Test Plug (Center Differential)
   *b	Test Plug (Line Pressure)

4. Lower the vehicle.
5. Fully apply the parking brake and chock all 4 wheels.
6. Start the engine and check idling speed.
7. Keep your left foot pressing the brake pedal firmly and move the shift lever to D.
8. Measure the line pressure when the engine is idling.
9. Fully depress the accelerator pedal. Read the highest line pressure as quickly as possible when the engine speed reaches stall speed.
10. In the same manner, perform the test with the shift lever in R.

    Specified Line Pressure

    Condition	D position MPa (kgf/cm2 , psi)	R position MPa (kgf/cm2 , psi)
    Idling	0.35 to 0.45 MPa (3.6 to 4.6 kgf/cm2 , 51 to 65 psi)	0.45 to 0.60 MPa (4.6 to 6.1 kgf/cm2 , 65 to 87 psi)
    Stall test	1.25 to 1.45 MPa (12.7 to 14.8 kgf/cm2 , 181 to 210 psi)	1.45 to 1.70 MPa (14.8 to 17.3 kgf/cm2 , 210 to 247 psi)

HINT: 

• Perform the test at the normal operating temperature for ATF (Automatic Transmission Fluid): 50 to 80°C (122 to 176°F).
• A line pressure test should always be carried out with at least 2 people. One technician should observe the conditions of the wheels or wheel chocks outside the vehicle while the other is performing the test.
• Be careful to prevent the SST hose from contacting the exhaust pipe.
• This check must be performed after ensuring that the engine is running properly.
• Perform this test while the A/C is OFF.
• When performing the stall test, do not continue more than 5 seconds.

1. Warm up the ATF (Automatic Transmission Fluid).
2. Lift the vehicle up.
3. Remove the test plug (center differential) on the transfer case and connect SST.
   • SST: 09992-00095 
     1. 09992-00151
     2. 09992-00271

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Test Plug (Center Differential)
   *b	Test Plug (Line Pressure)

4. Lower the vehicle.
5. Fully apply the parking brake and chock all 4 wheels.
6. Start the engine and check idling speed.
7. Keep your left foot pressing the brake pedal firmly and move the shift lever to D.
8. Measure the center differential operating hydraulic pressure when the engine is idling.
9. Fully depress the accelerator pedal. Read the highest center differential operating hydraulic pressure as quickly as possible when the engine speed reaches stall speed.

   HINT: 

   Begin the test with the steering wheel centered.

   Specified Center Differential Operating Hydraulic Pressure

   Condition	D position MPa (kgf/cm2 , psi)
   Idling	0.01 to 0.147 MPa (0.1 to 1.5 kgf/cm2 , 1.42 to 21.3 psi)
   Stall test	0.628 to 0.833 MPa (6.4 to 8.5 kgf/cm2 , 91.0 to 120.8 psi)

10. Check that the center differential operating hydraulic pressure drops when the engine reaches stall speed and the steering wheel is turned 140° to the left or right.