Mitsubishi Eclipse. Manual - part 769

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-85

STEP 10. Check PCM connector C-61 <2.4L Engine> or 
C-63 <3.0L Engine> for loose, corroded or damaged 
terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?

YES : Go to Step 11.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

STEP 11. Check the harness for open circuit or short 
circuit to ground between A/T control solenoid valve 
connector B-40 terminal 1 and PCM connector C-61 <2.4L 
Engine> or C-63 <3.0L Engine> terminal 124.
Q: Is the harness wire in good condition?

YES : Go to Step 6.
NO :  Repair or replace the harness wire.

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

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>

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-86

STEP 12. Measure the ground voltage at PCM connector 
C-54 <2.4L Engine> or C-55 <3.0L Engine> by backprobing.
(1) Do not disconnect connector C-54 <2.4L Engine> or C-55 

<3.0L Engine>.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 57 and ground by 

backprobing.

• Voltage should be 0.5 volt or less.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage within the specified range?

YES : Go to Step 13.
NO :  Go to Step 14.

STEP 13. Check the harness for open circuit or damage 
between A/T control solenoid valve connector B-40 
terminal 2 and PCM connector C-54 <2.4L Engine> or C-55 
<3.0L Engine> terminal 57.
Q: Is the harness wire in good condition?

YES : Go to Step 6.
NO :  Repair or replace the harness wire.

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>

AC001791AR

C-54 <2.4L ENGINE> OR
C-55 <3.0L ENGINE>

HARNESS CONNECTOR:
HARNESS SIDE

ACX02479

CONNECTOR: B-40

AK

B-40

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>

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-87

STEP 14. Check PCM connector C-54 <2.4L Engine> or 
C-55 <3.0L Engine> for loose, corroded or damaged 
terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?

YES : Go to Step 6.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

DTC 16 (P0712): Transmission Fluid Temperature Sensor System (Short Circuit)

.

Transmission Fluid Temperature Sensor System 
Circuit
Refer to 

P.23A-77

.

.

CIRCUIT OPERATION
Refer to 

P.23A-77

.

.

DESCRIPTIONS OF MONITOR METHODS
If transmission fluid temperature equals or exceeds 
specified value, PCM judges that transmission fluid 
temperature sensor 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)

• Not applicable

Sensor (The sensor below is determined to be 

normal)

• Not applicable

.

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>

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-88

LOGIC FLOW CHARTS (Monitor Sequence)

.

DTC SET CONDITIONS

Check Conditions, Judgement Criteria

• Transmission fluid temperature sensor voltage: 

0.2 volt or less. (1 second)

.

OBD-II DRIVE CYCLE PATTERN
Start the engine, keep the vehicle stopped in P range 
for 5 seconds, and turn OFF the ignition switch. Then 
restart 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 transmission fluid temperature 

sensor circuit

• Damaged harness or 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

AC205182

Transmission fluid 
temperature sensor 
voltage > 0.2 V

START

Good

Malfunction

END

Yes

No

Yes

No

Continuous failure 
for 1 sec.