Valve Body: Service and Repair

ON-VEHICLE SERVICE

Control Valve Assembly and Accumulators


COMPONENTS












REMOVAL AND INSTALLATION

Removal
1.Disconnect the battery negative terminal.
2.Remove engine undercover. Service and Repair.
3.Remove fender protector (LH). Removal And Installation.
4.Drain the A/T fluid. Checking.
5.Remove oil pan and oil pan gasket.

CAUTION:
Do not reuse oil pan gasket.





6.Check for foreign materials in oil pan to help determine cause of malfunction. If the ATF is very dark, smell burned or contains foreign particles, friction material (clutches, band) may need replacement. A tacky film that will not wipe clean indicates varnish build up. Varnish can cause valves, servo, and clutches to stick and can inhibit pump pressure.
-If ATF contains frictional material (clutch, bands, etc.), replace radiator and flush cooler line using cleaning solvent and compressed air after repair of A/T.
7.Remove magnets from oil pan.





8.Disconnect terminal cord assembly harness connector.
9.Remove snap ring from terminal body.
10.Remove terminal cord assembly by pushing terminal body into transaxle case.
11.Remove control valve assembly bolts (A), (B) and (C).
Bolt length, number and location:










12.Remove control valve assembly from transaxle case.

CAUTION:
Be careful not to drop manual valve and servo release accumulator return spring.





13.Remove manual valve from control valve assembly.

CAUTION:
Be careful not to drop manual valve.
14.Remove O-ring from terminal body.

CAUTION:
Do not reuse O-ring.
15.Disassemble and inspect control valve assembly if necessary.
Control Valve Assembly, "Control Valve Upper Body" and Control Valve Lower Body.





16.Remove servo release accumulator piston and N-D accumulator piston by applying compressed air if necessary.

CAUTION:
Hold each piston with lint-free cloth.





a.Apply compressed air to the oil hole as shown, and remove servo release accumulator piston from transaxle case.

CAUTION:
Strong flow of air will push the accumulator piston out along with a splash of ATF. To avoid this cover the area with lint-free cloth and blow air little by little.





b.Apply compressed air to the oil hole as shown, and remove N-D
accumulator piston and return spring from transaxle case.

CAUTION:
Strong flow of air will push the accumulator piston out along with a splash of ATF. To avoid this cover the area with lint-free cloth and blow air little by little.





c.Remove O-rings (1) from servo release accumulator piston (2)
and N-D accumulator piston (3).

CAUTION:
- Do not reuse O-rings.
- Wrap the removed servo release accumulator piston (2)
and N-D accumulator piston (3) in a lint-free cloth.





17.Remove lip seals (1) from transaxle case.

CAUTION:
Do not reuse lip seals.
Inspection





- Inspect the sliding surfaces of each accumulator piston and transaxle case, and replace if damaged or dented.
(1): Servo release accumulator piston (2): N-D accumulator piston
- Inspect the sliding surfaces of manual valve and valve body, and replace if damaged or dented.





- Inspect each return spring, and replace if damaged, deformed or worn. Accumulator for free length (L
1) and length (L
2).
(1): Return spring (Servo release accumulator)
(2): Return spring (N-D accumulator)

CAUTION:
Do not remove spring retainer (3).
Installation
Installation is in the reverse order of removal.

CAUTION:
- Completely remove all moisture, oil and old gasket from the oil pan gasket mounting surface of transaxle case and oil pan.
- Do not reuse O-rings, lip seals, oil pan gasket and oil pan bolts.
- Apply ATF to manual valve, O-rings, lip seals and sliding surfaces of the transaxle case.
NOTE:





- Set manual shaft in "N" position, then align manual plate (1) with groove in manual valve (2).
- After installing control valve assembly to transaxle case, make sure that shift selector can be moved to all positions.
- After completing installation, check for A/T fluid leakage and A/T
fluid level. Checking.