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Home >> Mitsubishi >> 2010 >> Eclipse Spyder GS, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Automatic Transaxle On-Vehicle Service) >> Automatic Transaxle Diagnosis >> Symptom Procedures >> INSPECTION PROCEDURE 7: Shift Shock when Shifting from "N" to "R" and Long Delay >> Diagnosis

INSPECTION PROCEDURE 7: Shift Shock when Shifting from "N" to "R" and Long Delay: Diagnosis

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

Required Special Tool: 

  1. STEP 1. Using scan tool MB991958, check actuator test item 1: Low-Reverse Solenoid Valve. 
    CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
    1. Connect scan tool MB991958 to the data link connector.
    2. Turn the ignition switch to the "ON" position.
    3. Set scan tool MB991958 to the actuator test mode.
      • Item 1: Low-Reverse Solenoid Valve.
        • An audible clicking or buzzing should be heard when the low-reverse solenoid valve is energized.
    4. Turn the ignition switch to the "LOCK" (OFF) position.

      Q: Is the solenoid valve operating properly? 

      1. YES:  Go to Step 2.
      2. NO:  Repair or replace the low-reverse solenoid valve. Refer to VALVE BODY <4A/T> or Refer to VALVE BODY <5A/T>. Then confirm that the symptom is eliminated.
        Fig 1: Connecting Special Tool MB991910 To Data Link Connector
        G04230562Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  2. STEP 2. Check when shift shock occurs. 

    Q: When does the shift shock occur? 

    When engaging from "N" to "R":  Go to Step 3.

    When the vehicle starts moving:  Go to Step  7.

  3. STEP 3. Check the hydraulic pressure (for reverse clutch). 

    Measure the hydraulic pressure for reverse clutch when the selector lever is at the "R" range. Check if the hydraulic pressure is within the standard value. Refer to , HYDRAULIC PRESSURE TEST .

    Q: Is the hydraulic pressure within the standard value? 

    1. YES:  Go to Step 4.
    2. NO:  Go to Step  9.
  4. STEP 4. Check the hydraulic pressure (for low-reverse brake). 

    Measure the hydraulic pressure for low-reverse brake when the selector lever is at the "R" range. Check if the hydraulic pressure is within the standard value. Refer to , HYDRAULIC PRESSURE TEST .

    Q: Is the hydraulic pressure within the standard value? 

    1. YES:  Go to Step 5.
    2. NO:  Go to Step  9.
  5. STEP 5. Check the reverse clutch system and low-reverse brake system. 
    1. Remove the valve body cover and valve body. Refer to TRANSAXLE <4A/T> or TRANSAXLE <5A/T>.
    2. Blow 108 kPa (15 psi) compressed air into the reverse clutch oil orifice of the transaxle case, and check if the reverse clutch piston moves and air pressures are maintained in that condition. Repeat for the low-reverse brake.

      Q: Are both air pressures maintained? 

      1. YES:  Go to Step 6.
      2. NO:  Go to Step  9.
        Fig 2: Locating Low-Reverse Brake Oil Orifice And Reverse Clutch Oil Orifice
        G04302969Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  6. STEP 6. Check the reverse clutch and low-reverse brake. 
    1. Remove the transaxle assembly.
    2. Check the facing for seizure and the piston seal ring for damage and interference with the retainer. Repair or replace the faulty parts. Refer to TRANSAXLE , REVERSE AND OVERDRIVE CLUTCH <4A/T> or Refer to TRANSAXLE , REVERSE AND OVERDRIVE CLUTCH <5A/T>. Then Retest the system.

      Q: Is the symptom eliminated? 

      1. YES:  The procedure is complete.
      2. NO:  Go to Step  10.
        Fig 3: Locating Reverse Clutch And Low-Reverse Brake
        G05102492Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  7. STEP 7. Check shift shock. 

    Q: Does shift shock occur sometimes? 

    1. YES:  Go to Step 8.
    2. NO:  Go to Step  9.
  8. STEP 8. Using scan tool MB991958, check data list item 2: TP Sensor. 
    CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
    1. Connect scan tool MB991958 to the data link connector.
    2. Turn the ignition switch to the "ON" position.
    3. Set scan tool MB991958 to the data reading mode.
      • Item 2: TP Sensor.
        • With the throttle valve in idle position, voltage should measure between 300 and 700 mV.
        • With the throttle valve in full-open position, voltage should measure 4,000 mV or more.
    4. Turn the ignition switch to the "LOCK" (OFF) position.
      Fig 4: Connecting Special Tool MB991910 To Data Link Connector
      G04230562Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

      Q: Is the measured voltage between 300 and 700 mV at idle, and 4,000 mV or more at the full-open position? 

      1. YES:  Go to Step 9.
      2. NO:  Check the TP sensor. Refer to DTCS P0122 , DTC P0123: TP SENSOR SYSTEM for 2.4L Engine or Refer to GROUP 13B <3.8L ENGINE>, DIAGNOSTIC TROUBLE CODE PROCEDURES - DTCS P0122 , DTC P0123: TP SENSOR SYSTEM for 3.8L Engine . Then check the symptom.
  9. STEP 9. Disassemble and clean the valve body. 

    Check the O-ring installation bolts for looseness and the valve body for damage. Repair or replace the faulty parts. Refer to VALVE BODY <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? 

    1. YES:  The procedure is complete.
    2. NO:  Go to Step 10.
      Fig 5: Identifying Valve Body Assembly
      G04230985Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  10. STEP 10. 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.
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