Automatic Transmission/Transaxle: Adjustments

LINE PRESSURE ADJUSTMENT





1. Drain out the automatic transmission fluid.
2. Remove the oil pan.
3. Remove the oil filter.
4. Remove the oil temperature sensor.
5. Press the solenoid valve harness grommet and connector into the transaxle case.





6. Press the catches of the solenoid valve harness grommets and pass the connector through the case hole.





7. Remove the valve body assembly. The manual valve can come out, so be careful not to drop it.





8. Turn the adjustment screw of the regulator valve and adjust so that the line pressure (kickdown brake pressure) becomes the standard value. When the adjustment screw is turned clockwise, the line pressure decreases; when it is turned to counterclockwise, it increases.

Standard value: 870 - 890 kPa (124 - 126 psi)
Oil pressure change for each turn of adjustment screw: 38 kPa (5.4 psi)





9. Check that the O-ring is installed on the upper surface of the valve body at the place shown in the figure.
10. Replace the O-ring of the solenoid valve harness grommet with a new one.





11. Pass the solenoid valve connector through the inside of the hole in the case.





12. Temporarily install the valve body while inserting the detent plate pin in the manual valve groove. Then install the oil temperature sensor and holder and tighten the bolts with the specified torque.

A bolt: 18 mm (0.709 inch) long
B bolt: 25 mm (0.984 inch) long
C bolt: 40 mm (1.575 inch) long
Valve body assembly mounting bolts: 11 Nm (8.0 ft. lbs.)

13. Install the oil filter.
14. Install a new oil pan gasket and oil pan.
15. Pour in the specified amount of ATF.
16. Perform the oil pressure test. Readjust if necessary.


REDUCING PRESSURE ADJUSTMENT
When Scan Tool Is Not Used





1. Remove parts up to the oil filter in the same way as for adjustment of the line pressure. The valve body need not be removed.
2. Tune the adjustment screw of the lower valve body and adjust so that the reducing pressure is the standard value. When the adjustment screw is turned clockwise, the reducing, pressure decreases; when it is turned counterclockwise, it increases.

NOTE: When adjusting the reducing pressure, aim for the center value [425 kPa (60 psi)] of the standard value allowance.

Standard value: 415 - 435 kPa (59 - 61 psi)
Oil pressure change for each turn of adjustment screw: 45 kPa (6.4 psi)

3. Install the oil filter and oil pan in the same way as for adjustment of the line pressure.
4. Perform the oil pressure test. Readjust if necessary.

When Scan Tool Is Used
1. Use the scan tool to force-actuate the pressure control solenoid valve to 50 % duty, and measure the kickdown brake apply pressure at that time. If the kickdown brake apply pressure is not within the standard value, adjust using the reducing pressure adjustment screw.

Standard value: 250 - 300 kPa (35 - 43 psi)
Oil pressure change for each turn of adjustment screw: 22 kPa (3 psi)

2. Check to be sure, after completing this adjustment, that the reducing pressure is within the range of 370-490 kPa (51-68 psi).

CAUTION: The adjustment should be made at an oil temperature of 70 - 80°C (158 - 176°F). If the adjustment is made at an oil temperature that is too high, the line pressure will decrease during idling, with the result that a correct adjustment cannot be made.