Mitsubishi Eclipse. Manual — part 830
AUTOMATIC TRANSAXLE DIAGNOSIS
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AUTOMATIC TRANSAXLE
23A-329
STEP 1. Using scan tool MB991958, check actuator test
item 06: Torque Converter Clutch Solenoid Valve.
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) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to actuator test mode for item 06:
Torque Converter Clutch Solenoid Valve.
• An audible clicking or buzzing should be heard when the
torque converter clutch solenoid valve is energized.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the solenoid valve operating properly?
YES : Go to Step 2.
NO : Repair or replace the torque converter clutch solenoid
valve. Refer to GROUP 23B, Valve Body
.
Then confirm that the symptom is eliminated.
STEP 2. Check the vibration.
Q: Does the vibration occur when the transmission fluid
temperature sensor connector has been disconnected?
YES : Check the engine system. Refer to GROUP 13A
<2.4L Engine>, Diagnosis
− Symptom Chart − Driving
, or GROUP 13B <3.0L Engine>, Diagnosis
− Symptom Chart − Driving
. If the
inspection result is not good, diagnose, repair, and/or
replace the engine component(s).
NO : Go to Step 3.
STEP 3. Check the torque converter hydraulic pressure.
Measure the torque converter hydraulic pressure. Then check if
the torque converter hydraulic pressure is within the standard
value. Refer to
, Hydraulic Pressure Test.
Q: Is the torque converter hydraulic pressure within the
standard value?
YES : Go to Step 4.
NO : Go to Step 5.
AC303127
AB
MB991911
16-PIN
MB991827
MB991824
AUTOMATIC TRANSAXLE DIAGNOSIS
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AUTOMATIC TRANSAXLE
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STEP 4. Replace the torque converter assembly.
(1) Remove the transaxle.
(2) Replace the torque converter assembly. Refer to GROUP
23B, Transaxle
. Then check the symptom.
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 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 6.
STEP 6. Replace the PCM.
Q: Is the symptom eliminated?
YES : The procedure is complete.
NO : Start over at Step 1.
AC001857
AC001860 AB
VALVE
BODY
ASSEMBLY
AUTOMATIC TRANSAXLE DIAGNOSIS
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AUTOMATIC TRANSAXLE
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INSPECTION PROCEDURE 15: Vehicle Shifts Differently with A/C Engaged
AC102733AB
Dual Pressure Switch System Circuit
AC004374
CONNECTOR: A-36
AC
A-36
AC001741
CONNECTOR: C-12
AT
C-12
AUTOMATIC TRANSAXLE DIAGNOSIS
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AUTOMATIC TRANSAXLE
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.
CIRCUIT OPERATION
• When the A/C is turned ON and the dual pres-
sure switch is closed, PCM (terminal number 83)
receives battery voltage and then determines the
A/C compressor has been signaled to engage.
• When the A/C compressor is engaged, the PCM
increases line pressure and briefly delays shift
points to compensate for the additional engine
load.
.
COMMENT
The cause is probably a faulty dual pressure switch
circuit or a defective PCM.
.
TROUBLESHOOTING HINTS (The most likely
causes for this case:)
• Malfunction of the dual pressure switch
• Damaged harness, connector
• Malfunction of A/C system
• 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
AC106611AB
CONNECTOR: C-28
C-28
AC106628
CONNECTOR: C-94
AB
CONNECTOR BLOCK (RH)
C-94
AC001657
CONNECTOR: C-57 <2.4L ENGINE> OR
C-59 <3.0L ENGINE>
AZ
PCM
C-57 <2.4L ENGINE> OR C-59 <3.0L ENGINE>
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