INSPECTION PROCEDURE 4: Does not Move (Forward or Backward): Diagnosis

WARNING: This page is about a different variant/trim than selected.

STEP 1. Check the hydraulic pressure.
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 . If some elements pressures are within the standard value and some are not, recheck the symptom.

Q: Are all pressures within the standard value?
1. YES: Check transmission fluid level and condition. If not OK, repair or replace as necessary, then retest the system. If OK, go to Step 3.
2. NO: Go to Step 2.
STEP 2. Disassemble and clean the valve body.
Check the O-ring installation bolts for looseness and valve body for damage. Repair or replace the faulty parts. Refer to VALVE BODY <4A/T> or Refer to VALVE BODY <5A/T>.

Replace the valve body assembly if the damage is too extensive. Then retest the symptom.

Q: Is the symptom eliminated?
1. YES: The procedure is complete.
2. NO: Go to Step 4.
  
  Fig 1: Identifying Valve Body Assembly
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 3. Check the transaxle powertrain components.
Disassemble the transaxle and check the planetary gear and output shaft, etc. Repair or replace the damaged parts. Refer to TRANSAXLE , PLANETARY GEAR , OUTPUT SHAFT , DIFFERENTIAL <4A/T> or Refer to TRANSAXLE , PLANETARY GEAR , DIRECT PLANETARY CARRIER , DIFFERENTIAL <5A/T>. Then check the symptom.

Q: Is the symptom eliminated?
1. YES: The procedure is complete.
2. NO: Go to Step 5.
  
  Fig 2: Locating Output Shaft And Differential
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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 disassembled). Refer to TRANSAXLE <4A/T> or Refer to TRANSAXLE <5A/T>. Confirm that the malfunction symptom is eliminated.
  Q: Is the symptom eliminated?
  1. YES: The procedure is complete.
  2. NO: Go to Step 5.
STEP 5. Replace the PCM.
When the PCM is replaced, register the encrypted code. Refer to ENCRYPTED CODE REGISTRATION CRITERIA TABLE .

Q: Is the symptom eliminated?
1. YES: The procedure is complete.
2. NO: Start over at Step 1.