Large Shock "N" ---> "R" Position

Large Shock "N" ---> "R" Position

SYMPTOM: There is a large shock when changing from "N" to "R" position.

DIAGNOSTIC PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT-73, "CONSULT-III Function (A/T)" or AT-78, "Diagnosis Procedure without CONSULT-III".
Consult-III Function (A/T)
Diagnosis Procedure Without Consult-III
Is any malfunction detected by self-diagnostic results?
YES >> Check the malfunctioning system. Refer to AT-73, "CONSULT-III Function (A/T)" or AT-78, "Diagnosis Procedure without CONSULT-III".
Consult-III Function (A/T)
Diagnosis Procedure Without Consult-III
NO >> GO TO 2.

2. CHECK LINE PRESSURE
Check line pressure at idle with selector lever in "D" position. Refer to AT-48, "Inspections Before Trouble "Diagnosis. Inspections Before Trouble Diagnosis
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.

3. DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly.
2. Check the following items:
- Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)
- Line pressure solenoid valve
- Oil pump assembly.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.

4. CHECK SYMPTOM
Check again. Refer to AT-53, "Check at Idle". Road Test
OK or NG
OK >> INSPECTION END
NG >> GO TO 5.

5. CHECK TCM
1. Check TCM input/output signals. Refer to AT-71, "TCM Terminal and Reference Value". RE4F03B 4 Speed Automatic Transmission
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.