Mitsubishi Eclipse. Manual - part 816

 

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Mitsubishi Eclipse. Manual - part 816

 

 

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-273

STEP 2. Using scan tool MB991958, check data list item 36: 
Torque Converter Clutch Solenoid Valve.
(1) Connect scan tool MB991958 to the data link connector.
(2) Start the engine. (Warming up engine)
(3) Set scan tool MB991958 to the data reading mode for item 

36: Torque Converter Clutch Solenoid Valve Duty%.

• When driving at constant speed of 60 km/h (37 mph), 

the display should be "70 

− 99.6%." (Gear range: 3rd 

gear)

• When the accelerator pedal is released [at less than 50 

km/h (31 mph)], the display should be "70 

− 99.6% → 

0% (decreases gradually as the vehicle speed 
decreases)." (Gear range: 3rd gear)

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the solenoid valve operating properly?

YES : Go to Step 3.
NO :  Go to Step 5.

STEP 3. Using scan tool MB991958, check data list item 52: 
Torque Converter Clutch Amount of Slippage.
(1) Connect scan tool MB991958 to the data link connector.
(2) Start the engine. (Warming up engine)
(3) Set scan tool MB991958 to the data reading mode for item 

52: Torque Converter Clutch Amount of Slippage.

• Driving at a constant speed of 60 km/h (37 mph), the 

display should be "

−10 to 10 r/min."

• If the accelerator pedal is released, the display on the 

scan tool changes. (50 km/h (31 mph) and less).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the clutch operating properly?

YES : Go to Step 4.
NO :  Go to Step 5.

AC303127

AB

MB991911

16-PIN

MB991827

MB991824 

AC303127

AB

MB991911

16-PIN

MB991827

MB991824 

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-274

STEP 4. Using scan tool MB991958, read the A/T 
diagnostic trouble code.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check for A/T diagnostic trouble code.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC 52 set?

YES : Replace the PCM.
NO :  The procedure is complete.

STEP 5. Check the hydraulic pressure (for torque 
converter).
Measure the hydraulic pressure for torque converter. Check if 
the hydraulic pressure is within the standard value. Refer to 

P.23A-28

, Hydraulic Pressure Test.

Q: Is the hydraulic pressure within the standard value?

YES : Go to Step 7.
NO :  Go to Step 6.

STEP 6. Adjust line pressure.
Adjust line pressure. Refer to 

P.23A-41

, Line Pressure Adjust-

ment. Then check the symptom.
Q: Is the symptom eliminated?

YES : The procedure is complete.
NO :  Go to Step 8.

STEP 7. Replace the PCM.
Q: Is the symptom eliminated?

YES : The procedure is complete.
NO :  Go to Step 8.

AC303127

AB

MB991911

16-PIN

MB991827

MB991824 

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-275

STEP 8. Replace the valve body.
(1) Replace the valve body. Refer to GROUP 23B, Transaxle 

P.23B-10

.

(2) Test drive the vehicle.
(3) Check for A/T diagnostic trouble code.
Q: Is DTC 52 set?

YES : Replace the torque converter. Refer to GROUP 23B, 

Transaxle 

P.23B-10

.

NO :  The procedure is complete.

DTC 53 (P0742): Torque Converter Clutch is Stuck On

.

DESCRIPTIONS OF MONITOR METHODS
With PCM signal for no lock-up engagement, if vehi-
cle speed equals or exceeds specified value, accel-
erator is ON, and torque converter slip amount is 
below specified value, PCM judges that torque con-
verter clutch is stuck ON.

.

MONITOR EXECUTION
Continuous

.

MONITOR EXECUTION CONDITIONS (Other 
monitor and Sensor)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• DTC 21 (P0335): Crankshaft position sensor mal-

function

• DTC 22 (P0715): Input shaft speed sensor mal-

function

• DTC 23 (P0720): Output shaft speed sensor mal-

function

• DTC 52 (P0741): Torque converter clutch system 

malfunction (Stuck OFF)

• DTC 36 (P0743): Torque converter clutch sole-

noid malfunction

Sensor (The sensor below is determined to be 

normal)

• Input shaft speed sensor

• Output shaft speed sensor

• Crankshaft position sensor

• Torque converter clutch solenoid

.

AC001860 AB

VALVE
BODY
ASSEMBLY

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-276

LOGIC FLOW CHARTS (Monitor Sequence)

.

DTC SET CONDITIONS (Entry Conditions and 
Malfunction Thresholds)

Check Conditions

• Throttle position sensor voltage: 1.5 volts or 

more.

• Output speed: 1,000 r/min or more.

• Solenoid status: OFF.

• Transmission range switch position: D, 3, 2 or L.

• Time after lock up clutch release: 5 seconds or 

more.

AC205239

START

END

Transmission range 
switch position is in 
D, 3, 2 or L range

TCC solenoid is in
OFF steady state

TCC in disengagement area

Timer start

TCC in disengagement area

Timer > 5 secs.

V

THROTTLE

 > 1.5 V

N

OPG-B

 > 1,000 r/min

N

E

 - 5 < N

IPG-A

 < N

E

 + 5

Continuous failure 
for 10 secs.

Good

Malfunction

Yes

No

Yes

No

Yes

No

Yes

No

Yes

No

Yes

No

Yes

No

Yes

No

Yes

No

N

E

 : 

Engine speed

N

OPG-B 

: Output speed

            (output shaft speed sensor)

N

IPG-A 

: Input speed

           (input shaft speed sensor)

V

THROTTLE

 : Throttle position sensor 

                  output voltage

 

 

 

 

 

 

 

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