Hydraulic Test

HYDRAULIC TEST

Line Pressure

PREPARATION
(a) Warm up the ATF.
(b) Remove the test plug on the transaxle case and connect SST. SST 09992-00094 (09992-00230)

CAUTION:
- Perform the test at normal operating ATF temperature 50-80°C (122-176°F).
- The line pressure test should always be carried out in pairs. One should observe the conditions of wheels or wheel stoppers outside the vehicle while the other is performing the test.

MEASURE LINE PRESSURE
(a) Fully apply the parking brake and chock the 4 wheels.
(b) Start the engine and check engine idling speed.
(c) Step down strongly on the brake pedal with your left foot and shift into the D position.
(d) Measure the line pressure when the engine is idling speed.
(e) Press the accelerator pedal all the way down. Quickly read the highest line pressure when engine speed reaches stall speed.





(f) Only when the shift solenoid valve ST is opened:
Apply battery positive voltage between terminal of the solenoid connector and body ground.





(g) In the same way, perform the test in the R position.
*:When battery voltage is supplied to terminal 4 of the solenoid connector and body ground. the shift solenoid valve ST valve is open.
If the measured pressures are not with in the specification, recheck the throttle cable adjustment and perform a retest.
(h) Clear DTC's after the test.





EVALUATION

Center Differential Control Clutch Test

PREPARATION
(a) Warm up the ATF.
(b) Remove the test plug and connect SST. SST 09992-00094 (09992-00111)

CAUTION:
- Perform the test at normal operating ATF temperature 50 - 80°C (122 - 176°F)
- The line pressure test should always be carried out in pairs. One should observe the conditions of wheels or wheel stoppers outside the vehicle while the other is performing the test.

MEASURE CENTER DIFFERENTIAL CLUTCH CONTROL PRESSURE
(a) Start the vehicle and open the accelerator open 50 % or more and check that the center differential clutch control pressure is in the range from more than 294 kPa (3.0 kgf/Sq. cm, 42 psi).





(b) Fully close the accelerator and check that the SST registers 9.8 kPa (0.1 kgf/Sq. cm. 1.4 psi) or less.

CAUTION:
- Confirm safety of the road before checking.
- Take care to avoid slip when you start the vehicle on a paved road.
- Check the pressure at normal driving ATF temperature 50 - 80°C (122 - 176°F).

Reference
To measure center differential control pressure to be measured with the solenoid opened by applying voltage to it, refer to the following.





1. Prepare a sub-assembly for checking as follows:
- Prepare a supply connector (Part No. 90980-10629 or 90980-11143)
- Connect a harness of 2 - 3 m (6.6 - 9.8 ft.) to terminal 1 of the connector. Place a bulb of 24W in between the harness.
- Connect a harness of 2 - 3 m (6.6 - 9.8 ft.) to terminal 3 of the connector.
2. Connect the inspection's sub-harness assembly to the solenoid connector of the transfer. Connect terminal 1 of the sub-harness to the battery's positive (+) terminal, and terminal 3 of the sub-harness to the battery's negative (-) terminal.
3. Measure the center differential control pressure at idling and when performing the stall test (When 1st gear).





EVALUATION

4. Clear DTC's after the test.