Mitsubishi Eclipse. Manual — part 828
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-321
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Are the solenoid valves operating properly?
YES : Go to Step 4.
NO : Go to Step 6.
STEP 4. Adjust the line pressure.
Adjust the line pressure. Refer to
, Line Pressure
Adjustment. Then check the symptom.
Q: Is the symptom eliminated?
YES : The procedure is complete.
NO : Go to Step 5.
STEP 5. 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
GROUP 23B, Valve Body
.
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 7.
STEP 6. Replace each solenoid valve.
Replace the faulty solenoid valve with a new one.
Q: Is the symptom eliminated?
YES : The procedure is complete.
NO : Go to Step 7.
STEP 7. Replace the PCM.
Q: Is the symptom eliminated?
YES : The procedure is complete.
NO : Start over at Step 1.
INSPECTION PROCEDURE 11: Early or Late Shifting Some Gears
.
COMMENT
If some of the shift points are early or late when driv-
ing, the cause is probably a malfunction of the valve
body, or it is due to the characteristics of the
INVECS-II system but is not an abnormality.
.
TROUBLESHOOTING HINTS (The most likely
causes for this case:)
• Malfunction of the valve body
• Malfunction of the PCM
AC001860 AB
VALVE
BODY
ASSEMBLY
AC001869 AB
OVERDRIVE
SOLENOID
VALVE
LOW-
REVERSE
SOLENOID
VALVE
VALVE
BODY
ASSEMBLY
UNDERDRIVE
SOLENOID
VALVE
SECOND
SOLENOID
VALVE
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-322
DIAGNOSIS
Required Special Tool:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness B
STEP 1. Using scan tool MB991958, check actuator test
item 14: INVECS-II Cancel Command.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Start the engine.
(3) Set scan tool MB991958 to actuator test mode for item14:
INVECS-II Cancel Command.
• Drive the vehicle and confirm the gear shifting corre-
spond to the standard shift line of the shift pattern dia-
gram. Refer to
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does the gear shifting correspond to the standard shift
line of the shift pattern diagram?
YES : The symptom is due to characteristics of the
INVECS-II system, but is not abnormal.
NO : Go to Step 2.
STEP 2. Check the shift points.
Q: Are the shift points early or late only when transmission
fluid is -29
°C (84°F) or less (early), or 125°C (257°F) or
more (late)?
YES : The symptom is due to characteristics of the
INVECS-II system, but is not abnormal.
NO : Go to Step 3.
AC303127
AB
MB991911
16-PIN
MB991827
MB991824
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-323
STEP 3. 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
GROUP 23B, Valve Body
.
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 4.
STEP 4. Replace the PCM.
Q: Is the symptom eliminated?
YES : The procedure is complete.
NO : Start over at Step 1.
INSPECTION PROCEDURE 12: No Diagnostic Trouble Codes (Does not Shift)
AC001860 AB
VALVE
BODY
ASSEMBLY
AC106638
Backup Power Supply System Circuit
AB
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-324
.
CIRCUIT OPERATION
PCM (terminal number 66) receives battery positive
voltage from the battery.
.
COMMENT
If shifting does not occur while driving and no diag-
nostic trouble codes are output, a malfunction of the
transmission range switch, or PCM may exist.
.
TROUBLESHOOTING HINTS (The most likely
causes for this case:)
• Malfunction of the transmission range switch
• Damaged harness, connector
• Malfunction of the PCM
DIAGNOSIS
Required Special Tool:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness B
STEP 1. Check the vehicle acceleration.
Q: Does the vehicle accelerate poorly (transaxle stays in
3rd gear) when starting from a stop with the selector
lever in "D" range?
YES : Go to Step 2.
NO : Go to Step 5.
AC001729AY
CONNECTOR: C-07
C-07
AC001657
CONNECTOR: C-54 <2.4L ENGINE> OR
C-55 <3.0L ENGINE>
PCM
BA
C-54 <2.4L ENGINE> OR C-55 <3.0L ENGINE>
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