Inspection Procedure 8

INSPECTION PROCEDURE 8: Shift Shock when Shifting from "N" to "D," "N" to "R" and Long Delay

COMMENT

If abnormal shock or delay of two seconds or more occurs when the selector lever is moved from "N" to "D" range or from "N" to "R" range while the engine is idling, the cause is probably abnormal line pressure or a malfunction of the oil pump or valve body.

TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THIS CONDITION:)

- Abnormal line pressure
- Malfunction of the oil pump
- Malfunction of the valve body
- Malfunction of the PCM

DIAGNOSIS

STEP 1. Check the hydraulic pressure.

(1)Measure the hydraulic pressure of each element when the transaxle is in 1st, 2nd or reverse. Check if each hydraulic pressure is within the standard value. Refer to Hydraulic Pressure Test, Hydraulic Pressure Test.

(2)If some elements pressures are within the standard value and some are not, recheck the symptom.

Q. Are all hydraulic pressures within the standard value?

YES Go to Step 3.
NO Go to Step 2.
STEP 2. Adjust line pressure.

Adjust line pressure. Refer to Adjustments, Line Pressure Adjustment.
Then check the symptom.

Q. Is the symptom eliminated?

YES The procedure is complete.
NO Go to Step 3.
STEP 3. Check when shift shock occurs.

Q. When does the shift shock occur?

When engaging from "N" to "D" and "N" to "R" : Go to Step 4.
When the vehicle starts moving : Go to Step 5.
STEP 4. Check the oil pump.

(1)Remove the transaxle.





(2)Check the oil pump (incorrect installation, damage and etc.) and replace the oil pump assembly if necessary (The oil pump cannot be disassembly). Transaxle Disassembly and Assembly [4A/T]
or [5A/T]. Confirm that the malfunction symptom is eliminated.

Q. Is the symptom eliminated?

YES The procedure is complete.

NO Go to Step 6.

STEP 5. Disassemble and clean the valve body.





Check the installation bolts for looseness and the O-ring, valves and valve body for damage.
Repair or replace the faulty parts. Valve Body Disassembly and Assembly [4A/T] or Valve Body [5A/T].
Replace the valve body assembly if the damages are thought to be irreparable. Then check the symptom.

Q. Is the symptom eliminated?

YES The procedure is complete.

NO Go to Step 6.

STEP 6. Replace the PCM.

When the PCM is replaced, register the encrypted code. Immobilizer System.

Q. Is the symptom eliminated?

YES The procedure is complete.
NO Start over at Step 1.