Mitsubishi Eclipse. Manual - part 809

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-245

STEP 12. Check the harness for an open or short circuit to 
ground between A/T control solenoid valve assembly 
connector B-40 (terminals 3, 4 and 5) and PCM connector 
C-61 <2.4L Engine> or C-63 <3.0L Engine> (terminals 106, 
120 and 130).
Q: Are the harness wires in good condition?

YES : Go to Step 13.
NO :  Repair or replace the harness wire.

STEP 13. Check the harness for an open or short circuit to 
ground between A/T control solenoid valve assembly 
connector B-40 (terminals 3, 4, 5, and 9) and solenoid valve 
connectors B-40-1, B-40-2 and B-40-3.
Q: Is the harness wire in good condition?

YES : Replace the PCM.
NO :  Replace the harness wire.

ACX02479

CONNECTOR: B-40

AK

B-40

AC001657

CONNECTOR: C-61 <2.4L ENGINE> OR
C-63 <3.0L ENGINE>

PCM

BC

C-61 <2.4L ENGINE> OR C-63 <3.0L ENGINE>

ACX02479

CONNECTOR: B-40

AK

B-40

AC002219

CONNECTORS: B-40-1, B-40-2, B-40-3

CK

B-40-1

B-40-2

B-40-3

VALVE BODY
ASSEMBLY

2

1

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-246

DTC 36 (P0743): Torque Converter Clutch Solenoid Valve System

.

Solenoid Valve System Circuit
Refer to 

P.23A-209

.

.

CIRCUIT OPERATION
Refer to 

P.23A-209

.

.

DESCRIPTIONS OF MONITOR METHODS
If lock-up is not engaged, and solenoid terminal volt-
age is below specified value, PCM judges that torque 
converter clutch solenoid valve has a failure.

.

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 41 (P0731): 1st gear incorrect ratio

• DTC 42 (P0732): 2nd gear incorrect ratio

• DTC 43 (P0733): 3rd gear incorrect ratio

• DTC 44 (P0734): 4th gear incorrect ratio

• DTC 46 (P0736): Reverse gear incorrect ratio

• DTC 31 (P0753): Low-reverse solenoid malfunc-

tion

• DTC 32 (P0758): Underdrive solenoid malfunc-

tion

• DTC 33 (P0763): Second solenoid malfunction

• DTC 34 (P0768): Overdrive solenoid malfunction

• DTC 54 (P1751): A/T control relay malfunction

Sensor (The sensor below is determined to be 

normal)

• Low-reverse solenoid

• Underdrive solenoid

• Second solenoid

• Overdrive solenoid

• A/T control relay

.

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-247

LOGIC FLOW CHARTS (Monitor Sequence)

.

DTC SET CONDITIONS (Entry Conditions and 
Malfunction Thresholds)

Check Conditions

• Solenoid status: either solid ON or OFF.

• Voltage of battery: 10 volts or more.

Judgement Criteria

• Solenoid voltage: 3 volts or less. (0.3 second)

• If DTC 36 (P0743) is set consecutively four times, 

the transaxle is locked into 3rd gear as a fail-safe 
measure, and the "N" range light flashes once 
per second.

.

OBD-II DRIVE CYCLE PATTERN
Start the engine, and keep the vehicle stopped in "P" 
range for 5 seconds.

.

TROUBLESHOOTING HINTS (The most likely 
causes for this code to be set are:)

• Malfunction of the torque converter clutch sole-

noid valve

• Damaged harness or connector

• Malfunction of the PCM

AC205240

START

END

TCC solenoid is in ON 
or OFF steady state

Voltage of battery > 10 V

Solenoid circuit 
voltage < 3 V

Continuous failure 
for 0.3 sec.

Good

Malfunction

Yes

No

Yes

No

Yes

No

Yes

No

TCC solenoid valve is in 
ON or OFF steady state

AC

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-248

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 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 : It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-6

.

NO :  Go to Step 2.

AC303127

AB

MB991911

16-PIN

MB991827

MB991824